JPH1090213A - Electrolytic tester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an electrolytic tester provided with a catalyst consume the purification capacity of the catalyst close to its limitation and reduce frequency of replacing the catalyst. SOLUTION: This electrolytic tester is provided with a DC power source electrifying through a test body in the electrolyte and between eletrodes, a catalyst purifying harmful gas generated in the electrolyte during electrification, and a judgement device 270 for judging the time for replacing the catalyst. The catalyst purification capacity is indicated as an active current amount C1 which is the product of the current and time. After the judgement device 270 finding a residual active current amount C4 of the catalyst on the basis of the active current amount C1 and a consumed current amount C2 of the catalyst, it compares the residual active current amount C4 with an estimated consumption current amount C5 when the test is started and sends a catalyst replacement signal when it is C4 <C5 . By controlling the catalyst replacement time by the current amount, economical efficiency can be improved by consuming the purification capacity of the catalyst up to or close to its limitation and test operating efficiency can be improved by drastically reducing the frequency of replacing the catalyst.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrolytic tester,
As basic components, an electrolytic tank for storing an electrolytic solution for immersing a test body, an electrode immersed in the electrolytic solution, a DC power supply for energizing the test body and the electrode, The present invention relates to an electrolysis tester including a catalyst for purifying harmful gas generated from a liquid.

[0002]

2. Description of the Related Art The above-mentioned electrolytic tester is used, for example, in a cathode peel test of a coating film (for example, see Japanese Patent Application Laid-Open No.
No. 12). This test uses NaCl as the electrolyte.
Since the polarity of the specimen is set to the cathode and the polarity of the electrode is set to the anode using an aqueous solution, the harmful chlorine gas is generated on the electrode side due to the electrolysis of the NaCl aqueous solution.

In this case, it is conceivable to purify chlorine gas by using activated carbon as a catalyst.

[0004]

Since the purifying ability of the activated carbon declines with time, it is necessary to replace the activated carbon with a new one before the purifying ability of the activated carbon in use completely disappears.

Therefore, as a simple method, it is conceivable to control the time for replacing the activated carbon with time. However, if the time is controlled, the following problems occur.

During the test, the current flowing between the test body and the electrode changes depending on the structure of the test body. For example, if the maximum current of the DC power supply is set to 50 A and the maximum current flows continuously, The purifying capacity maintenance time per kg of activated carbon is about 50 hours. Here, one test time is about 2
In terms of time, the number of possible tests is 25, and therefore, the activated carbon must be replaced every 25 tests. In this case, the exchange frequency of the activated carbon is too high, which leads to a decrease in test operation efficiency.

The actual current during the test is about 10 A
Therefore, the amount of current used in the total number of tests per 1 kg of activated carbon is 10 A × 2 h × 25 times = 500 A · h, and the effective current per kg of activated carbon is 50 A × 50 h ≒ 2,500.
Since it is Ah, according to the time management, only about 20% of the purification capacity of the activated carbon is consumed, and about 80% is wasted.

[0008]

SUMMARY OF THE INVENTION According to the present invention, the replacement time of the catalyst is controlled by the amount of current, whereby the purification capacity of the catalyst can be consumed to near its limit and the frequency of replacement of the catalyst can be greatly reduced. An object of the present invention is to provide an electrolytic testing machine.

According to the present invention, in order to achieve the above object,
An electrolytic cell for storing an electrolyte for immersing the test body, an electrode immersed in the electrolyte, a DC power supply for energizing between the test body and the electrode, and a harmful gas generated from the electrolyte during energization purify, and the catalyst, expressed as the effective current amount C ₁ which is the product of the purification capacity current and time, and a determination device for determining the replacement time of the catalyst, the determination apparatus, the effective use current Storage means for storing the amount C ₁ as a remaining effective current amount C ₄ , first calculating means for calculating a used current amount C ₂ in the electrode under test, and the used current amount C ₄ from the remaining effective current amount C _{4. A second} calculating means for calculating a new remaining effective current amount by subtracting ₂ and storing the same in the storage means;
₅ for calculating the remaining effective current C ₄
By comparing the expected use current amount C ₅ with, when C ₄ <C _5, electrolytic test machine is provided with a control means for transmitting a catalyst replacement signal.

Further, according to the present invention, in order to immerse a test body,
Electrolyte tank for storing electrolyte and immersed in the electrolyte
An electrode and a DC power supply for supplying electricity between the test piece and the electrode
Purifies harmful gases generated from the electrolyte during energization
And the purifying capacity is the effective current that is the product of current and time
C₁And the time to replace the catalyst
And a judgment device for interrupting the test.
Current consumption C at the electrode_TwoFirst calculating means for calculating
And the amount of current used C_TwoIntegration means for integrating
Flow rate C_ThreeStorage means for storing the effective current amount C₁Or
From the integrated current amount C_ThreeAnd the remaining catalyst
Effective current C_FourSecond computing means for determining the
Assumed current C_FiveA third calculating means for calculating
Effective current C _FourAnd expected current C_FiveAnd C
_Four<C_FiveControl means for transmitting a catalyst exchange signal.
There is provided an electrolysis tester having:

With the above-described structure, it is possible to automatically detect that the purifying ability of the catalyst has deteriorated and the time for replacement thereof has come before the test is performed.

When the numerical values in the above example of time management are used as they are, the effective current amount C ₁ per kg of activated carbon as a catalyst is 2500 A · h, and the used current amount C ₂ required for one test is 20 A. H and the expected current consumption C
Assuming that ₅ is C ₅ = 50 A × 2 h = 100 A · h, the effective current amount C ₁ of the activated carbon is consumed by 2400 A · h and the remaining effective current amount C ₄ becomes C ₄ = 100 A · h. The test can be performed up to the number of tests, that is, the next 120 times. Therefore, when the amount of current is managed, the number of possible tests is 121, which is about five times that in the case of time management. As a result, the frequency of replacing the catalyst can be significantly reduced.

The effective current C ₁ per kg of activated carbon is 250
At 0 A · h, the used current amount C ₂ in all the number of tests is
Since A · h × 121 times = 2420 A · h, the purification capacity of the activated carbon has been consumed by 96.8%, thereby greatly reducing the waste of the catalyst.

Further, according to the present invention, there is provided an electrolytic cell for storing an electrolytic solution for immersing a test body, an electrode immersed in the electrolytic solution, a DC power supply for applying a current between the test body and the electrode, the generated from the electrolyte to purify harmful gases, comprising a catalyst and represented the purification ability as an effective current amount C ₁ which is the product of the current and time, and a determination device for determining the replacement time of the catalyst in the , the determination device includes a first calculating means for calculating a used current amount C ₂ in said electrode during a test, an integrating means for integrating the used current amount C _2, a memory means for storing a cumulative use current amount C ₃ a second calculating means for calculating a predicted using current amount C ₅ in the test, from said effective current amount C ₁ by subtracting the predicted current used amount C ₅ obtains the allowable use current amount C ₆ of said catalyst third arithmetic Means and the allowable current amount C at the start of the test. _{The present invention} provides an electrolysis tester having control means for transmitting a catalyst replacement signal when C ₆ <C ₃ by comparing ₆ with the accumulated use current amount C ₃ .

According to the above configuration, the same operation and effect as described above can be obtained.

Furthermore, according to the present invention, the test body is immersed.
Electrolyte tank for storing electrolyte and immersion in the electrolyte
And the direct current flowing between the test piece and the electrode
Cleans the power supply and harmful gases generated from the electrolyte during energization.
Current, which is the product of current and time
Quantity C₁And the catalyst replacement time
A judgment device for judging, wherein the judgment device is
Current amount C₁Is the remaining effective current C_FourMemory hand to remember as
And the amount of current used in the electrode under test C _TwoCalculate
The first calculating means, and the remaining effective current amount C_FourFrom the
Current consumption C_TwoIs subtracted to calculate a new remaining effective current
And a second operator for storing the information in the storage means.
And the remaining effective current amount C_FourIs C_Four≧ 0 or
Or C_Four<0_FourWhen <0, touch
An electrolysis tester having control means for transmitting a medium exchange signal
Provided.

With the above configuration, the same operation and effect as described above can be obtained. In addition, since the components related to the expected current consumption are unnecessary, the configuration of the determination device can be simplified.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION

[A] Outline of Electrolytic Testing Machine Electrolytic testing machine 1 shown in FIG.
That is, a steel plate 3 as a metal material and a coating film 4 formed on the entire steel plate 3 are used for a corrosion resistance test.

The electrolysis tester 1 has an electrolysis device 5, and a harmful gas treatment device 6, an exhaust device 7, and an overflow device 8 having a suction function are additionally provided to the electrolysis device 5.

The electrolysis apparatus 5 includes a DC power supply (constant voltage power supply, maximum voltage 20 V, maximum current 50 A) 9, a computer-programmable controller 10, an electrolytic tank 12 for storing an aqueous solution of NaCl 11 as an electrolytic solution, It has a plate-shaped carbon electrode 13, which is a consumable electrode as an electrode for electrolysis immersed in an aqueous NaCl solution 11, an electric heater 14, a water level sensor 15, a temperature sensor 16, a water supply pipe 17, and a drain pipe 18. .

Since the NaCl aqueous solution 11 is used as the electrolytic solution, chlorine gas as a harmful gas is generated during the test due to the electrolytic decomposition of the NaCl aqueous solution 11. To cope with this, the upward opening 19 of the electrolytic cell 12 is sealed by a synthetic resin cover 20 that covers the opening. The upward opening 21 of the cover 20 is for taking the specimen 2 in and out of the electrolytic cell 12 and is sealed by a lid 22 that can be opened and closed when the lid is closed.
Thereby, the electrolytic cell 12 is sealed.

An electric power cylinder 23, which is a drive source for opening and closing the lid 22, is supplied with power from an external power supply.

The test piece 2 is suspended on a support bar 24 of the electrolytic cell 12 via a synthetic resin string 25 and
Immersed in. The carbon electrode 13 and the steel plate 3 of the test body 2 are connected to the DC power supply 9 via the current paths 26 and 27. A polarity switching relay 28 as polarity switching means is provided in the current paths 26 and 27. One of the current paths 2 is provided between the DC power supply 9 and the polarity switching relay 28.
7, an ammeter 29 is provided.

The DC power supply 9 is controlled to a constant voltage by the control device 10 and ON / OFF controlled. The polarity switching relay 28 is controlled by the control device 10 so that the polarity of the steel plate 3 of the specimen 2 is alternately switched to the anode or the cathode. In this case, the polarity of the carbon electrode 13 is, of course, opposite to that of the steel plate 3. Ammeter 2
9 inputs the current flowing through the carbon electrode 13 and the steel plate 3 to the control device 10.

One end of the water supply pipe 17 is connected to a tap 30 of a water supply, which is a water supply source, and the other end communicates with the electrolytic cell 12.
An electromagnetic valve 31 is provided at an intermediate portion of the water supply pipe 17. The opening and closing of the electromagnetic valve 31 is controlled via the control device 10 by the detection signal of the water level sensor 15. The drainage line 18 communicates with the bottom of the electrolytic cell 12 and has a manual cock 32.

The electric heater 14 is supplied with power from an external power supply,
ON / OFF control is performed via the control device 10 by detection signals of the water level sensor 15 and the temperature sensor 16.

The chlorine gas processing apparatus 6 as a harmful gas processing apparatus has a processing pipe 33 extending from the electrolytic cell 12, and the processing pipe 33 has an electric suction pump 34 and a chlorine gas (harmful gas) purification. A member 35 and a flow sensor 36 for detecting an abnormal part are provided. The suction pump 34 is supplied with power from an external power supply.

The exhaust device 7 has an exhaust pipe 37 extending from the electrolytic cell 12, and the exhaust pipe 37 detects an adsorbing member 38 for chlorine gas (poisonous gas), an electric exhaust fan 39, and occurrence of abnormality. Detection means 40 is provided. The exhaust fan 39 is supplied with power from an external power supply.

Overflow device 8 having suction function
Is an overflow pipe 41 extending from the electrolytic cell 12,
An intake port 42 provided therein and an overflow pipe 41
And an adsorbing member 43 for chlorine gas (hazardous gas) disposed on the inlet side.

[B] Overall Structure of Electrolysis Testing Machine (FIGS. 4 to 9) The electrolysis testing machine 1 is of a mobile type, and the front side is the front part X in FIGS. The test operation is performed from the front part X side.

As shown in FIGS. 5 to 9, the electrolytic test machine 1 has a rectangular machine base 44, and a plurality of casters 45 as running wheels are respectively attached to the lower surface of the machine base 44, in the illustrated example, at four corners. Further, assuming that the moving direction a of the machine base 44 is the longitudinal direction, that is, the left-right direction, hooks 46 for towing and pushing are provided on both outer end faces of the machine direction 44, that is, the left and right outer end faces.

On the machine base 44 along the moving direction a,
7 and 8, a mechanical section M is disposed on the right side, a box-shaped synthetic resin electrolytic cell 12 is disposed in the center, and a control section C is disposed on the other end side and on the left side in FIGS. Is done.

As shown in FIGS. 7 and 8, the electrolytic cell 12 is detachably attached to the machine base 44 through a pair of attachment plates 50 projecting from the lower ends of the left and right side walls 48 and 49 of the peripheral wall 47. Can be

The electrolytic cell 12, the mechanical unit M and the control unit C
The central cover 51, the left cover 52, and the right cover 53 constituting the synthetic resin cover 20 are respectively covered. The central cover 51 that covers the electrolytic cell 12
While sealing the upward opening 19 of the electrolytic cell 12,
It has an opening 21 which is an upward and rectangular shape for taking the specimen 2 in and out of the electrolytic cell 12. The lid 22 that opens and closes the opening 21 has a rotation center on one end side, that is, on the rear side.

As clearly shown in FIGS.
The electric power cylinder 23 which is a drive source for opening and closing the lid 22, the suction pump 34 in the chlorine gas treatment device 6
And a chlorine gas purifying member 35, an exhaust fan 39 of the exhaust device 7, and the like.

As clearly shown in FIGS.
Has a DC power supply 9 and a computer program type controller 1
0 and the polarity switching relay 28, the suction pump 3
4 and a transformer (not shown) such as the exhaust fan 39 and various switches.

With the above configuration, since the electrolytic cell 12 is independent of the mechanical section M and the control section C, the electrolytic cell 1
2 can be made sufficiently large, so that restrictions on the size of the specimen 2 can be relaxed.

The electrolytic cell 12, the mechanical section M and the control section C
Are independent of each other, so the maintenance workability for them is good.

Furthermore, since the electrolytic tester 1 is of a mobile type, the tester 1 can be easily carried into and out of a test room.

In addition, the relatively large and heavy electrolytic cell 12 is arranged at the center, so that the electrolytic test machine 1 has a good balance when moving.

The electrolytic cell 12, the mechanical section M and the control section C
Are arranged in a line along the moving direction a of the electrolytic tester 1, so that the width in the direction orthogonal to the moving direction a can easily be adapted to the width of the entrance and exit of a ready-made test chamber. For example, as shown in FIG. 6, the width b in the electrolytic test machine 1 is b = 800 mm, and the length c in the moving direction a is c.
Is set to c = 1600 mm.

[C] Arrangement Structure of Carbon Electrode and Electric Heater (FIGS. 7, 8, 10 to 13)
7 and a partition plate 54 which is opposed to and close to the inner surface of the peripheral wall 47 and which is detachable from the electrolytic cell 12,
The electrode chamber 55 is formed so as to be immersed in the aqueous solution 11.

The left side wall 48 of the peripheral wall 47 has a synthetic resin partition plate 56 forming the rear wall of the electrode chamber 55, and the front wall 57 of the peripheral wall 47 forms the front wall of the electrode chamber 55. It has a ridge 58 facing the partition plate 56. The partition plate 54 is slidably fitted in the opposing guide grooves 59 and 60 of the partition plate 56 and the convex strip 58. Therefore, the partition plate 54 forms the right side wall of the electrode chamber 55, and the left side wall part 48 forms the left side wall of the electrode chamber 55.

The plate-like carbon electrode 13 is accommodated in the electrode chamber 55 in an upright state and in parallel with the partition plate 54, and the upper portion of the carbon electrode 13 protrudes from the partition plate 54. The front and rear end surfaces of the carbon electrode 13 are sandwiched between the protruding plate 61 of the left wall portion 48 and the sandwiching members 62 and 63 of the front wall portion 57. The partition plate 54 is sandwiched between the pair of sandwiching bodies 64 and 65. The carbon electrode 13 is
In order to guide the insertion, a slope d is formed on the electrode side at the upper part of each holding body. The partition plate 54 has a number of through holes 66 for passing the NaCl aqueous solution 11 at a position facing the carbon electrode 13.
Having.

At the lower right side in the electrolytic cell 12, the peripheral wall 4
An electrode chamber 55 similar to the above is formed by utilizing the right side wall portion 49 of 7, and the plate-like carbon electrode 13 similar to the above is accommodated therein. Thereby, the voltage distribution in the test body 2 can be made uniform. In the right electrode chamber 55, the same components as those in the left electrode chamber 55 are denoted by the same reference numerals.

At the rear side of the electrolytic cell 12, the electrolytic cell 1
A heater chamber 68 is formed by the second peripheral wall 47 and a partition plate 67 which is close to and opposed to the inner surface of the peripheral wall 47 and is detachable from the electrolytic cell 12. The partition plate 67 is made of NaCl
It has a plurality of through holes 69 through which the aqueous solution 11 passes, and is formed in a pair of partition plates 56 of both electrode chambers 55 and is slidably fitted in both guide grooves 70 opposed to each other. Therefore, in the heater chamber 68, the front wall is formed by the partition plate 67 and the pair of partition plates 56, the rear wall is formed by the rear wall portion 71 of the peripheral wall 47, and the left and right walls are left and right wall portions. 48 and 49 are formed.

As clearly shown in FIGS. 7, 8, 12, and 13,
A pair of electric heaters 14 are accommodated in the heater chamber 68 at predetermined intervals in the left and right directions, and their coil portions e are placed on the lower side, respectively.
Above the liquid level f of the aCl aqueous solution 11, it is supported by the support 72 of the rear wall 71. Also, both electric heaters 14
Temperature sensor 1 for detecting the temperature of the NaCl aqueous solution 11 in between
6 are provided. The lower end of the temperature sensor 16 is NaC
1 is immersed in the aqueous solution 11, and the upper side is supported by the support 73 of the rear wall 71 above the liquid level f.

In the electrolytic cell 12, three partition plates 5
4, 67 and the area surrounded by the front wall 57 are used as the installation space g of the test body 2.

As shown in FIGS. 7, 8, and 13, in the installation space g, the inner surface of the front wall 57 is located above the liquid level f of the NaCl aqueous solution 11 and at the middle part in the left-right direction. A U-shaped support 74 protrudes. The partition plate 67 on the heater chamber 68 side is opposed to the support 74.
A concave portion 77 is formed by a pair of projecting portions 76 existing in the step portion 75 of FIG. Between the U-shaped support member 74 and the concave portion 77, a support bar 24 made of a synthetic resin and in the form of a channel is detachably mounted. As shown in FIGS. 1 and 13, the specimen 2 is suspended on a support bar 24 through a loop portion h of a synthetic resin string 25 attached to the
It is immersed in a Cl aqueous solution 11.

When the two carbon electrodes 13 and the two electric heaters 14 are accommodated in the electrode chamber 55 and the heater chamber 68, respectively, as described above, the contact between the 13, 14 and the test body 2 is reliably prevented, and the two carbon electrodes 13 and the two electric heaters 14 are prevented. The electrode 13 and both electric heaters 14 can be protected. The partition plates 54 and 67 are close to the peripheral wall 47 of the electrolytic cell 12, and
In addition, since both the electrode chamber 55 and the heater chamber 68 use a part of the peripheral wall 47 as a part of the chamber wall, the peripheral wall 47
The installation space g of the test body 2 can be widened as compared with the case where another partition plate is used in place of the above. Further, since the partition plates 54 and 67 can be detached from the electrolytic tank 12 and the respective carbon electrodes 13 can also be detached from the electrolytic tank 12, the partition plates 54 and 67 can be detached from the electrolytic tank 12 when maintenance such as cleaning in the electrolytic tank 12 is performed. , 67 and each of the carbon electrodes 13 are not in the way, thereby improving the maintenance workability. In addition, since each carbon electrode 13 is sandwiched between the peripheral wall 47 and the partition plate 54, the supporting structure of the carbon electrode 13 is simple and strong. Further, since each electric heater 14 is mounted on the fixed peripheral wall 47, the mounting structure is strong. The three partition plates 54, 67
May be configured in an integrated U-shape.

[D] Supply and drainage structure of the electrolytic cell (FIGS. 7, 8,
10, 13, 14) Above the heater chamber 68, the left side wall 4 of the electrolytic cell 12
In FIG. 8, an L-shaped water supply pipe 79 of a water supply pipe line 17 made of a synthetic resin pipe is provided with its outlet facing downward. As shown in FIG. 10, a flexible synthetic resin tube 80 is attached to the water supply pipe 79, and the lower end of the tube 80 has a synthetic resin holding cylinder 81 attached to the rear surface of the partition plate 56 on the heater chamber 68 side. It is inserted inside. The holding cylinder 81 prevents the lower end side of the tube 80 from swinging unnecessarily during water supply. The tube 80 is extracted from the holding cylinder 81 and used for cleaning the electrolytic cell 12.

As clearly shown in FIGS. 8 and 14, the water supply line 1
7 is provided on the left side wall portion 48 and the rear wall portion 71 on the water supply pipe 79 side half.
Are connected to a water supply part 82a of a water distribution block 82 provided in the machine base 44, and the water supply part 82a is connected to a half of the water supply pipe 17 on the side of the water tap 30.
An electromagnetic valve 31 is provided in a half portion of the water supply pipe 17 on the side of the water supply pipe 79. Preparation of the NaCl aqueous solution 11 is performed in the electrolytic cell 12 after supplying water to the electrolytic cell 12.

A drain 84 is provided at the center of the bottom wall 83 of the electrolytic cell 12.
Is opened, and a drainage pipe 18 made of a synthetic resin pipe is connected to the drainage port 84. A half of the drain pipe 18 on the drain port 84 side passes through the inside of the machine base 44 and is connected to a drain section 82 b of the water distribution block 82. The drainage line 82b has a drainage line 1
Eight drain groove 86 side halves are connected. In a half portion of the drain pipe 18 on the drain port 84 side, a manual cock 3 is provided at an intermediate portion thereof.
2 are provided.

[E] Water Level Control of Electrolyzer (FIGS. 7 and 8) A water level sensor 15 for controlling the amount of the NaCl aqueous solution 11 is provided on the right end side of the inner surface of the rear wall 71 of the electrolyzer 12. The water level sensor 15 has first to third detectors i to k extending in the vertical direction and having different height positions at the lower end, and these are located behind the liquid surface f of the NaCl aqueous solution 11. Part 71
Is supported by the support member 87. The lower end of the first detector i is at the highest position, the lower end of the third detector k is at the lowest position, and the lower end of the second detector j is the first and third detectors i, It is at an intermediate position between both lower ends of k.

During the supply of water to the electrolytic cell 12, the first and third detectors i and k are non-conductive, and the solenoid valve 31 is controlled to the open state by the controller 10. When the liquid level f rises to the lower end of the first detector i, the conduction between the first and third detectors i and k is established, and the electromagnetic valve 31 is controlled by the controller 10 to the closed state. This stops the water supply. If the liquid level f drops during the test and is separated from the lower end of the first detector i,
When the first and third detectors i and k become non-conductive, the electromagnetic valve 31
Is opened, so that water supply is performed again. As described above, the NaCl aqueous solution 11 is normally used by the first detector i.
Is controlled.

On the other hand, if the first detector i malfunctions during the test and water is not supplied even if the liquid level f is separated from the lower end of the first detector i, the liquid level f is further lowered. When the liquid level f is separated from the lower end of the second detector j, the connection between the second and third detectors j and k becomes non-conductive, and the DC power supply 9 is controlled to the OFF state by the controller 10. . As a result, the power supply to the carbon electrode 13 and the specimen 2 is cut off,
The test is stopped.

The second and third detectors j and k are also used to control both electric heaters 14. In other words, if the amount of the NaCl aqueous solution 11 is a specified amount, the lower ends of the second and third detectors j and k are in the NaCl aqueous solution 11 and the conductive state is established between the second and third detectors j and k. Therefore, the control device 10
Accordingly, both electric heaters 14 are controlled to be in the energized state. For example, when the liquid level f is separated from the lower end of the second detector j, the electrical conduction between the second and third detectors j and k becomes non-conductive. Is done.

[F] Wiring Structure of Carbon Electrode and Current-carrying Terminal Block for Specimen (FIGS. 8, 9, 11, 13, 15) In the front wall portion 57 of the electrolytic cell 12, a channel shape is formed above the U-shaped support 74. The receiving member 88 made of synthetic resin is fixed so as to extend in the left-right direction.

As clearly shown in FIGS.
On the outer surface of the right side wall portion 49 of the second, the vertical in the machine base 44,
A rectangular frame 90 extends along the frame 90.
Terminal box 9 on the upper surface of the lower angle material 91 extending in the front-rear direction
2 is fixed.

11, 13, and 15, feed lines 93 are respectively connected to the upper front side and the upper rear side of the left and right carbon electrodes 13, and each of the two feed lines 93 of each carbon electrode 13 is connected to each partition plate 54. From the notch 94 of the electrode chamber 55
Pulled out. As shown in FIGS.
And is drawn out of the electrolytic cell 12 through the terminal box 92 and connected to the connection terminal of the terminal box 92. A main line 97 connected to the connection terminal extends from the terminal box 92, and the main line 97 is switched along the outer surfaces of the right wall portion 49, the rear wall portion 71, and the left wall portion 48 of the electrolytic cell 12 to switch the polarity. DC power supply 9 via relay 28
Connected to. The power supply line 93, the terminal box 92, and the trunk line 97 constitute one of the current paths 26.

8, 13, and 15, the electrolytic cell 1
On the front wall 57 of the second member, a current-carrying terminal block 98 made of titanium used for connection with the test piece 2 is provided below the receiving member 88 and near the U-shaped support 74. The first connection portion 99 of the current-carrying terminal block 98 with the test body 98 is formed by the electrolytic cell 12.
And the second connection part 100 on the DC power supply 9 side is connected to the electrolytic cell 1
2 are respectively arranged outside. A plurality of connection holes 101 having female threads are formed in the first connection portion 99 so as to correspond to a plurality of power supply lines 103 connected to the plurality of test pieces 2. A trunk line 102 is connected to the second connection portion 100, and the trunk line 102 is connected to the DC power supply 9 via the polarity switching relay 28 along the outer surfaces of the front wall portion 57 and the left wall portion 48. The power supply line 103, the power supply terminal block 98, and the main line 102 form the other power supply path 27.

[G] Connection structure between carbon electrode and power supply line (FIG. 16) Each power supply line 93 is composed of a conductor 104 and a corrosion-resistant insulating coating layer 10.
5 The terminal m of the conductor 104 protruding from the corrosion-resistant insulating coating layer 105 of the power supply line 93 is connected to a conductive connection bolt 106.
Connected to. The connection hole 10 is formed at the corner of the carbon electrode 13.
The connection hole 107 has a female screw portion n at the back, and a connection bolt 106 is screwed into the female screw portion n.

Although the connection hole 107 may be a blind hole, in the illustrated example, it is a through hole extending obliquely and vertically, and the power supply line 93 and the connection bolt 106 extend from the lower opening end o of the connection hole 107 to the connection hole. Inserted at 107. Therefore, the connection bolt 106 has a tool, for example, an engagement portion with a flathead screwdriver, at the end opposite to the side to which the power supply line 93 is connected.
That is, it has the engaging groove 108.

The connection hole 10 located between the lower opening end o of the connection hole 107 and the end face of the connection bolt 106 on the engagement groove 108 side.
The space p of 7 is filled with a sealing material 109 such as silicone. A sealing material 109 similar to the above is provided in a space r of the connection hole 107 between the upper open end q and the end face of the connection bolt 106 on the extension side of the power supply line 93 and surrounding the insulating coating layer 105 of the power supply line 93. Is filled.

The connection structure between the connection bolt 106 and the terminal m of the conductor 104 in the power supply line 93 is as follows. The connection bolt 106 is made of titanium for the purpose of improving its corrosion resistance, and has a blind hole 110 opened at one end surface. A hollow cylinder 111 made of a copper alloy, brass in the illustrated example, is press-fitted into the blind hole 110, and the conductor 1 is inserted into the hollow cylinder 111.
04 terminal m is inserted and connected via the solder layer 112. Since titanium has poor solderability,
The brass hollow cylinder 111 having good solderability is used.

One end surface of the hollow cylindrical body 111 and the power supply line 93
A sealing material 113 similar to the above is disposed between the end faces of the insulating coating layer 105 so as to surround the conductive wire 104 protruding from the end face. Thereby, the NaC of the conductive wire 104 protruding from the brass hollow cylindrical body 111 and the insulating coating layer 105 is formed.
The watertightness of the aqueous solution 11 can be improved.

With the above configuration, the carbon electrode 1
3 and the feed line 93 are connected to the connection hole 1 of the carbon electrode 13.
07, only the power supply line 93 is exposed to the outside, thereby achieving a compact connection structure.

Since the connection between the carbon electrode 13 and the conducting wire 104 of the power supply line 93 is securely sealed, the watertightness of the connection to the NaCl aqueous solution 11 is greatly improved to avoid corrosion of the connection. Can be.

Further, since the connection portion has excellent watertightness as described above, the carbon electrode 13 can be immersed in the NaCl aqueous solution 11, thereby making the upper part of the carbon electrode protrude from the liquid surface. Therefore, the effective capacity of the NaCl aqueous solution can be increased as compared with the case where the connection portion is provided there.

In addition, since the connection bolts 106 are screwed to the female threads n of the carbon electrode 13, the adhesion between the female threads n and the connection bolts 106 is good. Can be reliably connected electrically.

The connection bolt 106 and the end of the power supply line 93 connected to the connection bolt 106 are connected to the connection hole 1 by a seal material 109.
07, the carbon electrode 13 and the power supply line 9 are fixed.
3 has high mechanical connection strength.

[H] Corrosion resistance test of test specimen (FIGS. 1-3, 1
3, 15, 17 to 21) As shown in FIGS. 1 and 2, a damaged portion 114 reaching the steel plate 3 is formed by the cutter on the coating film 4 on one plane side of the test piece 2 in preparation for the corrosion resistance test. In this case, the coating film 4 on the other surface and the coating film 4 on the peripheral surface of the test body 2 function as masking for the steel plate 3. The hole 115 of the test body 2 is
It is used to pass the synthetic resin string 25 for suspension.

In the corrosion test of the test piece 2, the test piece 2
Is immersed in an aqueous NaCl solution 11 and then the steel sheet 3 and Na
A method of flowing a direct current between the two carbon electrodes 13 in the Cl aqueous solution 11 and alternately switching the polarity of the steel plate 3 to an anode or a cathode is performed.

When the polarity of the steel sheet 3 is the cathode, it is the coating film peeling step. During this process, on the steel plate 3 side, OH ions generated by the electrolysis of water are damaged by the damaged portions 114 of the coating film 4.
Is used as a starting point to decrease the adhesion of the coating film 4 to the steel plate 3, thereby promoting peeling of the coating film and blistering. On the other hand, when the polarity of the steel plate 3 is the anode, it is the steel plate corrosion process, that is, the anodic oxidation process. By alternately repeating the peeling of the coating and the anodic oxidation, the peeling of the coating 4 and the corrosion of the steel plate 3 starting from the damaged portion 114 are promoted, whereby the comprehensive evaluation of the corrosion resistance is completed in a short time. It can be performed.

In the steel sheet corrosion process, the amount of corrosion of the steel sheet 3 is proportional to the amount of coulomb that is energized.
The amount of coulomb required to corrode steel plate 3 is
Is determined based on the coating film peeling area.

Therefore, a method is adopted in which, after the coating film peeling step, the coating film peeling area of the steel sheet 3 is measured, and the amount of Coulomb in the steel sheet corrosion step is determined according to the coating film peeling area.

FIG. 17 shows an embodiment of the corrosion resistance test method. Hereinafter, the corrosion resistance test method will be described in detail with reference to FIG.

(A) First coating film peeling step In this step, as shown in FIG. 17 (i), the polarity of both carbon electrodes 13 in the NaCl aqueous solution 11 is set to the anode by the polarity switching relay 28, and the test is performed. The polarity of the steel plate 3 of the body 2 is set to the cathode, respectively, and a current is applied between the carbon electrodes 13 and the steel plate 3 from the DC power source 9 at a constant voltage via the NaCl aqueous solution 11.

After a lapse of 5 to 10 minutes from the start of energization, that is, after the current value has stabilized to some extent, the current value I ₀ flowing through the steel plate 3 is measured by the ammeter 29.

Although the peeling of the coating film 4 does not occur within the above-mentioned time, as shown in FIG. 17 (ii), the peeling coating film 4a is generated by the subsequent energization.

The measurement of the current value I ₀ may be performed before the start of the first coating film peeling step. In this case, the polarity of the steel plate 3 is set to the cathode. This is because if the polarity of the steel plate 3 is set to the anode, the steel plate 3 is corroded at the damaged portion 114 of the coating film 4 and the coating film 4 is hardly peeled in the next coating film peeling step.

(B) Release Coating Film Removal Step The test piece 2 was taken out of the aqueous NaCl solution 11, and the release coating 4a was removed from the test piece 2 using an adhesive tape. As shown, the coating film peeling surface 3a is exposed on the steel plate 3. This removal is performed by using an aqueous NaCl solution 1
In step 1, the cleaning can be performed by ultrasonic cleaning or high-pressure water flow.

(C) Second coating film peeling step In this step, as shown in FIG. 17 (iv), the polarity of both carbon electrodes 13 in the NaCl aqueous solution 11 is set to the anode by the polarity switching relay 28, and the test is performed. The polarity of the steel plate 3 of the body 2 is set to the cathode, respectively, and a current is applied between the carbon electrodes 13 and the steel plate 3 from the DC power source 9 at a constant voltage via the NaCl aqueous solution 11.

Then, in the same manner as described above, 5 to 10
After a lapse of minutes, that is, after the current value has stabilized to some extent, the current value I ₁ flowing through the steel plate 3 is measured by the ammeter 29.

Although the peeling of the coating film 4 does not occur within the above-mentioned time, as shown in FIG. 17 (iv), the peeling coating film 4a is generated by the subsequent energization.

(D) Coulomb amount setting step in steel sheet corrosion Both current values I ₀ and I measured in steps (a) and (c) above
₁ is introduced into the arithmetic unit 116. In the arithmetic unit 116, first, the difference ΔI between the two current values I ₀ and I ₁ is obtained. Since this difference ΔI is substantially proportional to the coating film peeling area of the steel sheet 3, obtaining this difference ΔI is substituted for measuring the coating film peeling area. Next, the coulomb amount according to the difference ΔI is obtained as the energizing time T under a constant voltage. The amount of coulomb can be determined by measuring a voltage change under a constant current or by simultaneously measuring a current and a voltage.

(E) First Steel Plate Corrosion Step In this step, as shown in FIG.
Without removing the release coating film 4a generated in the process, the polarity of both carbon electrodes 13 in the NaCl aqueous solution 11 is set to the cathode and the polarity of the steel plate 3 of the test piece 2 is set to the anode by the polarity switching relay 28. Then, a current is applied between the carbon electrodes 13 and the steel plate 3 from the DC power supply 9 via the NaCl aqueous solution 11 at a constant voltage. This energization time is the energization time T determined in the step (d).

As a result, a recess 117 due to corrosion (anodic oxidation) is formed on the coating peeling surface 3a of the steel plate 3, and the recess 1
Corrosion products 118 accumulate in 17.

The first steel plate corrosion step needs to be performed without removing the release coating 4a generated in the step (c) [FIG. 17 (iv)]. This is because when the release coating 4a is removed, the coulomb amount obtained in the step (d) does not match the coating removal area of the steel sheet 3, and the release coating 4a must be removed. For example, the peeling area of the steel sheet 3 in the corrosion step is the same as that in the step (b) (FIG. 17 (iii)).
This is because it is almost the same as the coating film peeling area of the steel sheet 3 generated in the above.

(F) Step of Removing Peeling Coating Film and Corrosion Product The test piece 2 is taken out from the aqueous NaCl solution 11, and the peeling coating film 4a and the corrosion product 118 are removed from the test piece 2 using an adhesive tape. As a result, as shown in FIG. 17 (vi), the coating film peeling surface 3a and the concave portion 117 are exposed on the steel plate 3. This removal can also be performed by ultrasonic cleaning or high-pressure water flow in the NaCl aqueous solution 11 as described above.

Thereafter, if necessary, the steps from the second coating film peeling step to the peeling coating film and corrosion product removing step are repeated as a cycle, and a plurality of cycles are repeated. In this case, the difference ΔI is obtained, for example, from the current value I ₁ measured in the second cycle peeling step of the first cycle and the current value I ₂ measured in the third cycle peeling step of the second cycle. Can be

When the coating film peeling step is performed after the steel sheet corrosion step, the peeling of the coating film 4 is hindered by the corrosion product 118. Therefore, between the two steps, the peeling coating film and the corrosion product removal step are performed. It is necessary to intervene.

Hereinafter, a specific example will be described.

I. Coating Film Peeling Test The following coating film peeling test was performed to examine the relationship between the applied voltage and the degree of peeling of the coating film 4.

(1) Conditions for Specimen 2 Steel plate: width 70 mm, length 150 mm, thickness 1.017 mm; coating film: pretreatment agent Nippon Paint Co., trade name SD2800,
Coating method Cationic electrostatic coating, film thickness 20-25 μm;
Damaged part Formed to a length of 50 mm using a cutter. Specimen 2 was prepared under the same conditions as above except that no pretreatment was performed.

As shown in FIG.
And a loop portion h was formed on the other end side. Corrosion resistant insulating coating layer 105 of power supply line 103
Of the test piece 2 was soldered to the steel plate 3 on the surface of the test body 2 opposite to the surface where the damaged portion 114 exists. The hole 115 of the test body 2, the portion where the steel plate 3 was exposed at the soldered portion, and the conductive wire 104 were covered with the same sealing material 119 as described above. The bolt insertion hole 121 of the terminal 120 connected to the other end of the power supply line 103 was aligned with the connection hole 101 of the power supply terminal block 98, and the bolt 122 was passed through the bolt insertion hole 121 and screwed into the connection hole 101. Thereby, the steel plate 3 and the DC power supply 9 were electrically connected via the polarity switching relay 28. Test body 2 is made of synthetic resin string 2
5 is suspended on the support bar 24 through the loop portion h of NaCl.
It was immersed in the aqueous solution 11.

(2) The concentration of the aqueous NaCl solution 11 was 3%
The solution temperature was set to 40 ° C., the polarity of the steel plate 3 was set to the cathode, the polarity of the carbon electrode 13 was set to the anode, the test time was set to 2 hours, and the applied voltage was changed in the range of 0 to 20 V. Test film 2 was subjected to a coating film peeling test.

(3) Test Results FIG. 19 is a graph showing the relationship between the applied voltage and the peeling width s of the coating film from the damaged portion 114 (see FIG. 17 (iii)). As is clear from FIG. 19, the peeling of the coating film 4 starts at an applied voltage of about 2.5 V regardless of the presence or absence of the pretreatment. In order to stably remove the coating film, the applied voltage is set to about 5.5 V or more for the specimen 2 with pre-treatment, and to about 8 V or more for the specimen 2 without pre-treatment. Good to do.

At the same applied voltage, the amount of peeling of the coating film 4 is smaller in the specimen 2 with pretreatment than in the specimen 2 without pretreatment. From this, it can be said that pretreatment is better in order to improve the durability of the coating film 4.

II. Corrosion resistance test (1) The conditions for the test piece 2 in this corrosion resistance test are the same as those in the above-mentioned section I.

(2) Each step in the specific example and the conditions related thereto are as shown in Table 1. However, the concentration of the NaCl aqueous solution was set to 3%, and the liquid temperature was set to 45 ° C.

[0102]

[Table 1]

(3) As a comparative example, a test piece 2 having the same pre-treatment as described above and a test piece 2 having no pre-treatment were used.
A composite corrosion test (CCT: Cycle Corrosion Test) capable of simultaneously evaluating the deterioration of the steel sheet and the corrosion of the steel sheet 3 was performed. In this test condition, a step of performing salt spray treatment for 2 hours, wet treatment for 2 hours and drying treatment for 4 hours was repeated three times, and this was one cycle. Therefore, the time required for one cycle is 24 hours.

(4) Test Results FIG. 20 shows that each cycle corresponds to 1, 40, 60, and 80 cycles of the comparative example to 1, 2, 3, and 4 cycles of the specific example, respectively. FIG. 17 is a graph showing the relationship with the coating film peeling width s (see FIG. 17 (iii)). As is clear from FIG. 20, in the coating film peeling width s, one cycle in the specific example is 2 cycles in the comparative example.
It is almost equal to 0 cycles.

Table 2 shows the relationship between each cycle and the maximum sheet thickness reduction in a specific example using the test piece 2 with pretreatment.

[0106]

[Table 2]

FIG. 21 is a graph showing the relationship between the same cycle as described above and the maximum sheet thickness reduction amount. Specimen 2 with pretreatment was also used in the comparative example. As is clear from FIG. 21, even in the maximum thickness reduction amount, one cycle in the specific example is substantially equal to 20 cycles in the comparative example.

From these results, according to the specific example, it is possible to promote the peeling of the coating film 4 and the corrosion of the steel plate 3 and, hence, the metal material, and to conduct a comprehensive corrosion resistance evaluation in a short time. It is clear that there is.

When only the peeling test of the coating film 4 is performed, the polarity switching relay 28 is switched so that the polarity of the steel plate 3 becomes the cathode as described above. In this case, the coating film 4 is provided only on one surface of the steel plate 3. This is because there is no need to mask the other side of the steel plate 3 or the like since the steel plate corrosion process is not included.

[I] Judgment device for judging replacement time of carbon electrode (FIGS. 4 to 6, 22 to 24) As the carbon electrode 13 is used for a long time, its carbon particles fall off and the energized area changes. Therefore, when the service life of the carbon electrode 13 has expired, the electrolysis tester 1 is provided with the present apparatus 123 in order to replace it with a new carbon electrode 13. This device 12
Reference numeral 3 is incorporated in the computer program control device 10.

FIG. 22 is a block diagram of the judging device 123, and FIG. 23 is a flowchart showing the operation of the judging device 123. "Test condition setting" in FIG. 23 means that a corrosion resistance test including a coating film peeling step and a steel sheet corrosion step is performed,
This means selecting whether to perform the coating film peeling test or terminating the test, and entering each condition.

In FIG. 22, the judgment device 123
The useful life of the carbon electrode 13 is defined as an effective current amount I ₁ · T ₁ which is a product of a certain current I ₁ flowing through the carbon electrode 13 and a total usable test time T ₁ when the current I ₁ continues to flow. A life storage means 124 for storing as C ₁ , a current measuring means (ammeter) 29 for measuring a current I ₂ flowing through the carbon electrode 13 during a test, a time measuring means 125 for measuring a test time T ₂ , ₂ and the first calculating means 132 ₁ calculates a used current amount C ₂ which is a product I ₂ · T ₂ of the test time T _2, from start of use of the carbon electrode 13 by integrating the current used amount C ₂ an integrating means 126 for calculating a cumulative use current amount C _3, as compared to the storage unit 127 for storing the cumulative use current amount C _3, and the effective current amount C ₁ and the integration used current amount C ₃ at the start of the study, Control means 128 for transmitting an electrode exchange signal when C ₁ <C ₃ And

With this configuration, it is possible to automatically detect the replacement time of the carbon electrode 13 which is a consumable electrode when the service life of the carbon electrode 13 has expired.

In this case, the test is continued even if the relationship between the effective current amount C ₁ and the accumulated current amount C ₃ satisfies C ₁ <C ₃ after the start of the test. This is permitted by the on a margin of a few times tested effective current amount C _1.

Further, the judging device 123 includes the control means 1
There is provided a message display means 129 for notifying that the electrode replacement time has arrived based on the electrode replacement signal from 28, and a prohibition means 130 for prohibiting energization of the carbon electrode 13.

As clearly shown in FIGS. 4 to 6, the message from the message display means 129 is displayed as characters on a liquid crystal display panel 131 provided on the upper surface of the left cover 52 covering the control section C. Further, the prohibiting means 130 turns the DC power supply 9
It operates to maintain the F state. Thereby, the tester can know the replacement time of the carbon electrode 13 without fail.

As shown in FIG. 23, after the electrode is replaced, the judging device 123 resets the device 123 to change the integrated current amount C ₃ of the storage means 127 to C ₃ = 0.
It is configured not to operate unless it is

If the relationship between the effective current amount C ₁ and the integrated current amount C ₃ at the start of the test is C ₁ ≧ C ₃ , the test is started, and the calculation and integration of the used current amount C ₂ are performed.

The determination device 123 is provided for the carbon electrode 13
An effective current amount C ₁ second calculating means 132 ₂ for determining the remaining effective current amount C ₄ by subtracting the integrated current used amount C ₃ from the remaining effective current amount display means for displaying the remaining effective current amount C ₄ 133 And

[0120] The second computing unit 132 _2, the remaining effective current amount _{C 4, C 4 (%)} = {1- (C 3 / C 1)} × 100
Is calculated as The remaining effective current amount C ₄ by the remaining effective current amount display means 133 is displayed on the liquid crystal display panel 131 as shown in FIG.
As shown in FIG. ₄ , a bar graph is displayed so that the remaining effective current amount C ₄ gradually decreases. Thereby, the tester can easily know the remaining service life of the carbon electrode 13 and the status of change.

The effective current amount C ₁ and the integrated current amount C
_When the relationship with ₃ is C ₁ ≦ C ₃ , the remaining effective current amount C ₄ is displayed as C ₄ = 0%.

[J] Sealing structure of opening in electrolytic cell (FIGS. 6 to 10, 13, 25 to 27) As shown in FIG.
Before that, the height of the rear wall 57, 71 is left, the right wall 48,
Lower than the height of 49. The left and right walls 48, 49
The protruding portions from the front and rear wall portions 57 and 71 are vertical front edges 1
34, a front lower edge 135, a horizontal upper edge 136, a rear lower upper edge 137, and a vertical rear edge 138. The upper edges of the front and rear walls 57, 71 and the left and right walls 48, 49
The rubber seal member 139 is attached to the entire edges 134 to 138 of the front opening 19, that is, the entire periphery of the upward opening 19.

As clearly shown in FIG. 25, the center cover 5
1 is a front wall 140, a rear wall 141, and both walls 140, 14
It consists of an upper wall 142 connecting the two, and is placed over the electrolytic cell 12 from above. Thereby, the front side of the electrolytic cell 12,
The upper side and the rear side are covered by the center cover 51. As shown in FIGS. 8, 9, and 25, inwardly protruding pieces 143 are provided on the right end side and the left end side, respectively, on the lower inner surfaces of the front and rear walls 140 and 141. The two protrusions 143 on the right end side
In order to form the frame body 90 of the machine base 44, the frame body 90 is detachably attached to the rear angle member 144 before extending in the vertical direction.
Further, the left-side projecting pieces 143 are detachably attached to the rear angle member 145 before extending in the vertical direction of the machine base 44.

As clearly shown in FIGS. 6, 10 and 25, the upper wall 142 has an outer frame 146 and a recess 147 surrounded by the outer frame 142. The recess 147 includes a relatively large shallow recess 148 on the front side and a relatively small deep recess 149 on the rear side.
At the bottom wall t of 8, there is an opening 21 having an upward and quadrangular shape for inserting and removing the specimen 2 into and out of the electrolytic cell 12.

The left and right portions 150, 150 of the outer peripheral frame portion 146,
As shown in FIG. 10, 151 has a shape along the upper edge 134, the upper horizontal edge 136, and the lower upper edge 137 of the front and lower walls 48 and 49 of the electrolytic cell 12. The left and right portions t ₁ , t ₂ of the bottom wall of the shallow recess 148 have a shape along the upper edge 135 and a part of the horizontal upper edge 136.

As clearly shown in FIGS.
The left and right side walls of the recess 147₁, U _TwoIs the electrolytic cell 12
Is fitted between the left and right side walls 48, 49 of the
Left and right portions 150 and 151 of the outer frame 146
But left and right side walls 48 and 49, upper edge 135 descending,
A part of the flat upper edge 136 and the rear lower upper edge 137
To contact the upper surface of the sealing member 139,
Left and right wall u₁, U_TwoOuter surfaces are left and right walls 48, 4
9 vertical leading edge 134, forward descending upper edge 135, horizontal top
Edge 136, rear descending upper edge 137 and vertical rear edge 138
At this time, it is in close contact with the inner surface of the seal member 139.

[0127] As further best shown in FIG. 7,10,13,27, the lower surface of the bottom wall front portion t ₃ of a shallow recess 148, seal member 139 at the front wall portion 57 of the electrolytic cell 12
And the lower surface of the bottom wall v of the deep recess 149 is in close contact with the upper surface of the sealing member 139 at the rear wall 71 of the electrolytic cell 12.

As described above, the central cover 51 is attached to the electrolytic cell 1.
2 from above, and attach the center cover 51 to the machine base 44.
, The opening 19 of the electrolytic cell 12 can be reliably sealed.

[K] Opening / closing structure of the lid and a structure for collecting water droplets attached to the inner surface of the lid (FIGS. 4 to 7, 9, 13, 14, 2)
5 to 28) As shown in FIGS. 4, 6, 26, and 27, an annular seal member 152 is attached to the upper wall 142 of the central cover 51 on the entire periphery forming the upward opening 21. The annular sealing member 152 has an annular lip 152a protruding from its upper surface and surrounding the opening 21. As a result, an annular gutter 153 that is outside the annular seal member 152 and surrounds the annular seal member 152 is formed by cooperation of the annular seal member 152, the shallow concave portion 148, and the deep concave portion 149. In the annular gutter 153, the left,
The right grooves 154 and 155 are substantially entirely inclined forward and downward, and the front grooves 156 are V-shaped. Figures 6 and 1
4, 27, drain holes 157, 15 are provided at the right end of the bottom surface of each of the front groove 156 and the rear deep recess 149.
8 are opened, and the drains 157 and 158 are connected to the tube 1
The drain 59 is connected to the downstream side of the manual cock 32 of the drain pipe 18.

As clearly shown in FIGS.
The lid 22 that opens and closes the opening 21 is located on the front side and covers the lid 2.
2, a transparent synthetic resin plate 160, and the plate 160
And a stainless steel plate 161 that abuts against the trailing edge. As clearly shown in FIGS. 6 and 13, when the opening 21 is closed, the transparent synthetic resin plate 160 covers substantially the entirety of the shallow recess 148, and its inner surface is in close contact with the annular lip 152a of the annular sealing member 152. 161 covers substantially the entirety of the deep recess 149, and the rear edge 161 a is located near the opening of the deep recess 149. That is, substantially the entire annular gutter 153 is covered by the lid 22.

[0131] A pair of stainless steel brackets 162 disposed at predetermined intervals on the inner surface side of the steel plate 161;
61 and a pair of stainless steel reinforcing rib members 163 arranged on the outer surface side of the
64 respectively. Also, both reinforcing rib members 1
At 63, a protruding portion 163a protruding forward from the steel plate 161 and disposed on the rear outer surface side of the transparent synthetic resin plate 160
And a rear part of a pair of synthetic resin reinforcing rib members 165 disposed on the inner surface side of the main plate 160, the transparent synthetic resin plate 160
Are connected by a plurality of bolts 166. The front side of each reinforcing rib member 165 is bonded to the transparent synthetic resin plate 160.

As clearly shown in FIGS. 6, 7, and 9, the lid supporting shaft 167 extends in the left-right direction substantially in the central region of the deep concave portion 149, and has both ends at the left and right side walls u ₁ , right side of the concave portion 147. u
₂ and the left and right side walls 48 and 49 of the electrolytic cell 12, and can be rotated by both bearings 169 on the outer side of both steel reinforcing plates 168 provided on the outer sides of the left and right side walls 48 and 49. Supported by Further, the support shaft 167 penetrates through each bracket 162 of the lid 22 and the short cylinder 170 fixed to the bracket 162, and is detent-coupled to the short cylinder 170.

As clearly shown in FIGS. 7, 9, and 28, the right end of the support shaft 167 protruding from the right side wall 49 of the electrolytic cell 12 penetrates the upper end of the link 171 and the short cylinder 172 fixed thereto. It is locked to the short cylinder 172 by rotation. The lower end of the link 171 is pivotally connected via a connecting pin 174 to a piston rod 173 of an electric power cylinder 23 disposed below the link 171.

The cylinder body 175 of the power cylinder 23
The lower end is connected to the bifurcated support member 176 of the machine base 44 by the connecting shaft 1.
It is pivoted through 77. The support member 176 is fixed to a mount 179 supported by the lower angle member 91 of the frame body 90 and the support 178. The power cylinder 23 is an electric motor 1 integrated with the cylinder body 175.
80.

On the outer surface of the right side wall 49 of the electrolytic cell 12,
A link guide plate 181 is provided so as to overlap the reinforcing plate 168. The guide plate 181 has L-shaped legs 183 on the upper and lower edges of the flat plate portion 182, respectively, and the L-shaped legs 183 are attached to the right side wall 49 via the reinforcing plate 168. The flat plate portion 182 has a notch portion 184 for avoiding interference with the support shaft 167 and a guide pin 185 projecting from the link 171 slidably fitted therein, and has an arc-shaped guide hole 186 extending vertically. And Limit switches 187 and 188 operated by guide pins 185 are mounted on the inner surface of the flat plate portion 182 above and near the lower end of the guide hole 186. The lower limit switch 188 is, as shown in FIG.
The upper limit switch 18
7 determines the open position of the lid 22, as shown in FIG. When the opening 21 is opened, as shown in FIG. 27, one end of the lid 22 on the rotation center side,
The rear edge 161a of the 61 is a deep recess 149 of the annular gutter 153.
It is arranged in.

In the corrosion resistance test, NaC was used as described above.
Since the temperature of the aqueous solution 11 is raised to about 40 ° C., the opening 2
Many water droplets tend to adhere to the inner surface of the transparent synthetic resin plate 160 of the lid 22 closing the cover 1.

With the above-described configuration, many water droplets adhering to the inner surface of the transparent synthetic resin plate 160 travel along the steel plate 161 when the lid 22 is opened, and the deep concave portion 149 of the annular gutter 153 from the rear edge 161a side. Dropped inside and collected.
Water attached to the annular seal member 152 and dripping to the outside thereof is similarly collected by the annular gutter 153. The water collected in this way is discharged through a drain line 18 through a tube 159.
Is discharged.

As shown in FIGS. 4, 10, 13, 25, and 27, an L-shaped plate 189 is attached to the center cover 51 below the front wall 149a forming the deep recess 149, and the L-shaped plate 189 is provided. 189 and the front wall 149a cooperate to form the narrow groove 190. In the narrow groove 190, the heater chamber 68 is provided.
The upper bent edge 191a of the cover member 191 that covers the cover member 191 is engaged with the lower bent portion 191b of the cover member 191. It is embedded.

[L] Connection structure between the center cover and the left and right side covers (FIGS. 6 to 8, 25, and 26) A center cover 51 covering the front side, the upper side, and the rear side of the electrolytic cell 12, and the center cover thereof The connection structure of the left side cover 52 that covers the control unit C adjacent to 51 is configured as follows. That is, as clearly shown in FIGS. 25 and 26, the edge of the central cover 51 adjacent to the left cover 52 is opened in a series over the entire circumference and forward, upward, and rearward. Is formed with a concave groove 192. On the edge adjacent to the center cover 51 in the left cover 52,
A ridge 193 is formed over the entire circumference so as to be bent in a series and inward.

When the center cover 51 is fixed to the machine base 44, the left side cover 52 is placed in front of the protruding ridge 193 and the rear lower end thereof in the concave groove 192 in the center cover 51.
If the left side cover 52 is lowered by engaging the front and rear upper ends, and the upper side of the convex ridge 193 is subsequently engaged with the upper side of the concave groove 192, the left side cover 52 is joined to the center cover 51. You. The same applies to the connection structure between the center cover 51 and the right cover 53.

With this configuration, even if the left and right side covers 52 and 53 are covered with water, it is possible to prevent the control section C and the mechanical section M from being flooded.

The water that has entered the joint between the center cover 51 and the left and right side covers 52 and 53 is received by the concave grooves 192 and discharged downward.

Further, in maintaining the electrolytic cell 12, the mechanical section M and the control section C, the left and right side covers 52,
53, lift the left and right side covers 52, 53
Can be removed from the center cover 51. On the other hand, connecting the left and right side covers 52 and 53 to the center cover 51 is also simple as described above. In addition, since no seal member is used for each joint, removal and attachment work is not required.

Thus, in the maintenance of the electrolytic cell 12, the mechanical section M and the control section C, their workability can be improved.

[M] Chlorine gas treatment device (1) Overall structure and operation (FIGS. 4, 7 to 11, 1)
3, 14, 29 to 32) In the coating film peeling step of the corrosion resistance test, each carbon electrode 13
Is set to the anode, chlorine gas is generated on the side of each carbon electrode 13 along with the electrolysis of the NaCl aqueous solution 11.

The chlorine gas treatment device 6 is provided in the electrolysis tester 1 for purifying chlorine gas. The chlorine gas generated around each of the carbon electrodes 13 due to the electrolysis of the NaCl aqueous solution 11 converts the chlorine gas into the NaCl aqueous solution 11. From the NaCl
A function of collecting together with the aqueous solution 11, a function of decomposing NaClO which is a reaction product of NaOH and chlorine gas generated by electrolysis of the NaCl aqueous solution to generate NaCl, and a function of returning the NaCl to the electrolytic cell 12. Having.

Hereinafter, the chlorine gas processing apparatus 6 will be specifically described. As shown in FIGS. 4, 7, 8, 10, 11, and 13, in the left electrode chamber 55, a chlorine gas (hazardous gas) collecting hood 194 is placed on the partition plate 54 and the partition plate 56. An attachment plate 195 integral with the hood 194 is screwed to the left side wall 48 of the electrolytic cell 12.
As clearly shown in FIGS. 7 and 11, the hood 194 covers the entire upper portion of the carbon electrode 13 and seals the upward opening 55a of the electrode chamber 55. The hood 194 has a box-shaped hood main body 196 mounted on the partition plate 54 and the partition plate 56, and a roof-shaped portion 197 integral with the hood main body 196 and having a cross-sectional mountain shape. Roof 19
7, the lower ridge line 199 is inclined at an angle α ≧ 1 degree such that the rear end side which is one end side is higher than the front end side which is the other end side. At the rear end side of the roof-shaped portion 197, at the start of water supply to the electrolytic cell 12, the electrode chamber 5
A through hole 200 for bleeding the air in 5 is formed.

The suction side of the processing pipe 33 penetrates through the bottom wall 83 of the electrolytic cell 12, and a suction pipe 201, which is a terminal thereof, is erected in the electrode chamber 55. The suction port 202 of the suction pipe 201 is disposed close to the high position side of the ridge line 199 of the roof-shaped portion 197, and is inclined forward and toward the ridge line 199 in order to smoothly suck the chlorine gas. doing. As clearly shown in FIGS. 7, 11, and 29, the hood 194 extends over both inner surfaces of the hood main body 196 and the lower surface of the roof-shaped portion 197, and has a suction port 202.
A pair of baffle plates 20 are located on both sides of the
3 Both baffle plates 203 are provided so that the chlorine gas (hazardous gas) avoids the suction port 202 and the air vent hole 200.
It acts to prevent it from flowing toward.

The suction pipe 201 extends along the rear surface of the protruding plate 61 on the left side wall portion 48 of the electrolytic cell 12 and fits into the through hole 205 of the annular body 204 protruding from the rear surface of the protruding plate 61. It is supported by the electrolytic cell 12 immovably.

The right electrode chamber 55 is also provided with a chlorine gas collecting hood 194, a suction pipe 201, and the like as described above. Therefore, on the right electrode chamber 55 side, the same components as those on the left are denoted by the same reference numerals.

As clearly shown in FIGS. 7, 8, and 14, the processing pipeline 33 having the two suction pipes 201 is connected to the machine base 44.
Along the outer surface of the rear wall 71 of the electrolytic cell 12 from the inside through the mechanical part M, it is finally branched into two branches, and the two discharge ports 206
Is N in the heater chamber 68 at the rear wall 71 of the electrolytic cell 12.
An opening is formed in each of the portions storing the aCl aqueous solution 11.

As clearly shown in FIGS. 9 and 14, a suction pump 34 is provided in the processing line 33 in the machine section M. Further, on the discharge side of the suction pump 34 of the processing pipeline 33, a chlorine gas purifying member 35 is provided on the upstream side, and a flow rate sensor 36 for detecting an abnormality in the processing system is provided on the downstream side. The suction pump 34 is a support member 207 of the machine base 44.
And the chlorine gas purifying member 35 is mounted on a support 208 of the machine base 44. The suction pump 34
A suction port 209 is provided at the lower end surface, and a discharge port 210 is provided at the lower end portion of the outer peripheral surface.

A drain pipe 211 branches off from the suction side of the suction pump 34 of the processing pipe 33, and the drain pipe 211 has a manual cock 212 at an intermediate portion and a drain pipe 18
Is connected downstream of the manual cock 32. The drain pipe 211 is connected to the suction pump 34 and the chlorine gas purifying member 35.
, So that the water can be drained from them.

The chlorine gas purifying member 35 has a filter and a catalyst therein, and the catalyst has a function of adsorbing chlorine gas and decomposing NaClO which is a reaction product. The NaClO is used for coating 4 due to its bleaching action.
Must be decomposed, since the appearance of the coating film 4 is significantly different from the corrosion state in the natural environment.

With the above configuration, the N
The chlorine gas generated around the carbon electrode 13 immersed in the aCl aqueous solution 11 is immediately collected together with the NaCl aqueous solution 11 from the NaCl aqueous solution 11 and then purified by the chlorine gas purifying member 35. It is returned to the tank 12.

In this case, the bubble-like chlorine gas generated in the vicinity of each carbon electrode 13 floats in the NaCl aqueous solution 11 and smoothly enters the suction port 202 in a bubble state by the guiding action of the chlorine gas collecting hood 194. In addition, the baffle plates 203 also have a suction port avoiding action for the chlorine gas, so that they are efficiently sucked into the processing pipeline 33 from the suction ports 202. Further, due to the inclination of the lower surface of the hood 194, generated chlorine gas does not accumulate in the hood 194, and the accumulated chlorine gas is not sucked, so that the suction pump 34 does not generate air bite.

Thus, the aqueous solution of chlorine gas NaCl 11
Since the diffusion into the NaCl aqueous solution 11 can be suppressed, generation of NaClO in the NaCl aqueous solution 11 and dissolution of chlorine gas in the NaCl aqueous solution can be suppressed as much as possible.

FIG. 30 shows the relationship between the test time and the effective chlorine concentration for activated carbon, ruthenium carbon (a mixture of activated carbon and ruthenium) and granular nickel as a catalyst used in the chlorine gas purifying member 35. In the figure,
The effective chlorine concentration is a quantitative value of chlorine gas dissolved in the NaCl aqueous solution 11 (see JIS K1425). In the measurement, the temperature of the NaCl aqueous solution 11 was kept at 45 ° C., and the current was continuously applied at 50 A for 20 hours. Then, 200 cc of the NaCl aqueous solution 11 was collected, and then the catalyst was put into the collected NaCl aqueous solution kept at 45 ° C. And a method of determining the effective chlorine concentration every time a predetermined time elapses. FIG.
As is clear from the above, as the catalyst used for the chlorine gas purifying member 35, activated carbon and ruthenium carbon having high effective chlorine resolution are effective.

FIG. 31 shows the relationship between the test time and the effective chlorine concentration when activated carbon is used as the catalyst. The test conditions were as follows: 50 A continuous energization, temperature of NaCl aqueous solution 11
° C. As is clear from FIG.
When activated carbon is used as a catalyst, the effective chlorine concentration can be kept extremely low at about 0.003% or less even after the test time exceeds 20 hours.

FIG. 32 shows the temperature 45 of the NaCl aqueous solution 11.
The case where 20 A continuous energization is performed at ℃ is shown. Also in this case, the effective chlorine concentration can be maintained at about 0.004% or less even after the test time exceeds 100 hours.

As a result of various experiments, the effective chlorine concentration was 0.00
It was confirmed that when the content was 5% or less, whitening of the coating film 4 did not occur.

In the processing apparatus 6, since the flow rate of the NaCl aqueous solution 11 flowing on the downstream side of the chlorine gas purifying member 35 is measured by the flow rate sensor 36, for example, the chlorine gas purifying member 35 may be normal without clogging. If so, the flow sensor 36 measures the corresponding flow rate. On the other hand, if the chlorine gas purifying member 35 is clogged, the flow rate is reduced as compared with the case where it is normal, and the flow rate sensor 36 measures the flow rate.

According to the above configuration, an abnormality in the processing system can be easily and reliably detected. Further, the flow sensor 36 is disposed downstream of the chlorine gas purifying member 35, and fine foreign matter that has entered the processing pipe line 33 is caught by the member 35, so that the operation of the flow sensor 36 is hindered by the foreign matter. There is no. Thus, the accuracy of the flow sensor 36 can be maintained for a long time.

(2) Abnormal point detector in processing system (FIG. 4 to FIG. 4)
In FIG. 33, the flow sensor 36 has a function of transmitting an abnormal signal that varies depending on the type of abnormality in the processing system, and the flow sensor 36 determines the type of abnormality based on the abnormal signal of the flow sensor 36. The control means 213 for determining and transmitting an output signal according to the type of the abnormality is connected,
13 is connected to a display means 214 for displaying the type of abnormality according to the output signal.

A storage means 215 is connected to the control means 213, and as shown in FIG. 34, an effective range of the flow rate Q, that is, an upper limit value A1 and a lower limit value A2 of the flow rate are previously stored in the storage means 215. A2 ≦ Q ≦ A1, which is a range between the two, is stored. Further, the control unit 213 is connected to a prohibition unit 216 that prohibits the power supply to the carbon electrode 13 based on the output signal.

These means 213 to 216 are incorporated in the computer program type control device 10 and constitute an abnormal point detector 217 of the processing system together with the flow rate sensor 36. The display means 214 displays, for example, a message, and the message is displayed in characters on the liquid crystal display panel 131 on the upper surface of the left cover 52 covering the control unit C as clearly shown in FIGS. The prohibiting means 216 turns the DC power supply 9 on.
It operates to control to the FF state.

As shown in FIGS. 33 and 35, when a test start signal is input, the flow sensor 36
Measuring the flow rate to Q ₁ aqueous solution of NaCl 11 flowing. If the measured flow rate Q ₁ is in the effective range of A2 ≦ Q ₁ ≦ A1, the control means 213 so it determines that the flow rate sensor 36 is transmitting a normal signal, the carbon electrodes 13 is energized corrosion test start Is done.

If the measured flow rate Q ₁ is Q ₁ > A1, the control means 213 determines that the flow rate sensor 36 has transmitted an abnormal signal and that the abnormal signal corresponds to the absence of the catalyst in the chlorine gas purifying member 35. Judgment is made and an output signal corresponding to the judgment is transmitted. As a result, the display means 214 displays a message indicating that the test is stopped because the catalyst is not mounted, and the prohibition means 216 prohibits energization of the carbon electrode 13.

The flow rate Q ₁ measured by the flow rate sensor 36 is Q ₁ <A
In the case of 2, the same operation as described above is performed. However, a message indicating that the test is to be stopped is displayed on the display means 214 because the filter / catalyst is clogged, the circulation is abnormal, or the like.

The abnormal point detector 217 of this processing system is controlled to operate even during the corrosion test.

According to the detector 217, a faulty part of the processing system can be easily and reliably detected and accurately notified to a tester, and the configuration is simple and relatively inexpensive.

(3) Chlorine gas purifying member (FIGS. 7, 9, 36)
36) As clearly shown in FIG. 36, the chlorine gas purifying member 35 is composed of a synthetic resin outer cylinder 218 and a cylindrical catalyst unit 219 housed in the outer cylinder 218. Outer cylinder 2
Reference numeral 18 denotes a bottomed cylindrical main body 220 fitted with the catalyst unit 219 and an opening 221 for closing the opening 221 of the main body 220 and pressing the catalyst unit 219 against the bottom wall 222 of the main body 220. It comprises a removable lid 223. The catalyst unit 219 includes a synthetic resin cylinder 225 having end walls 224 at both ends, and activated carbon 226 as a catalyst contained in the cylinder 225.

The one end wall 224 and one of the bottom walls 222 of the bottomed cylindrical body 220 facing the end wall 224, in the illustrated example, the annular convex portion 227 on the end wall 224 is the other, and therefore the bottom wall 2
22, the NaCl aqueous solution inlet 229 in the bottom wall 222 is communicated with the through-hole 230 in the end wall 224 inside the annular recess 228 in the bottom wall 222. The through hole 230 in the other end wall 224 of the catalyst unit 219 communicates with the NaCl aqueous solution outlet 232 on the peripheral wall of the bottomed cylindrical body 220 via the passage 231 of the lid 223.

In the outer cylindrical body 218, the bottomed cylindrical main body 220 is composed of a cylindrical body 233 and a circular end plate 235 which is attached to one end surface of the cylindrical body 233 by a plurality of bolts 234 and forms a bottom wall 222. Become. The circular end plate 235
The liquid sealant is applied to one end surface of the cylindrical body 233 with which the liquid sealant contacts. The outer surface of the circular end plate 235
9 having a through hole 236 communicating with the connector 9
9, is connected to a pipe member 238 which is a part of the processing pipe line 33 and extends from the discharge port 210 of the suction pump 34 as shown in FIG.

Further, the circular end plate 235 has a circular concave portion 239 located on the inner side of the circular end plate 235 inside the annular concave portion 228.
The circular recess 239 and the end wall 224 of the catalyst unit 219 cooperate to form a NaCl aqueous solution communication space 240 communicating with the inflow port 229 and the through hole 230.

The cylindrical body 225 of the catalyst unit 219 has a cylindrical body 241 and a pair of circular end plates 24 having the same structure, each of which is attached to the opening at both ends thereof to form an end wall 224.
It consists of two. The circular end plate 242 includes the outer plate 243 and the inner plate 24.
4 is provided. The outer plate 243 has the annular convex portion 227 on the outer peripheral portion of the outer surface thereof, and has a cylindrical body 24 near the outer peripheral portion of the inner surface.
As shown in FIG. 37, a plurality of openings 246 are provided so as to have an annular projection 245 fitted and joined to one of the openings, and to be opened in a region surrounded by the annular projections 227 and 245. Having. Annular convex portion 245 inside outer plate 243
The synthetic resin mesh filter 2 covers the entire area surrounded by
48, and the opening 2 of the outer plate 243 is provided in the area.
Inner plate 244 with a plurality of openings 247 that match 46
Are fitted and joined. The opposed openings 246 and 247 of the inner and outer plates 244 and 243 allow the circulation space 24 to be formed.
A plurality of through-holes 230 are formed to communicate the “0” with the inside of the cylindrical body 225 of the catalyst unit 219, and a filter 248 exists in each of the through-holes 230.

As shown in FIG. 38, the lid 223 has a circular cylindrical portion 249 and a circular flange portion 250 continuously provided on the outer end side of the circular cylindrical portion 249. The external thread 251 on the outer peripheral surface of the circular cylindrical portion 249 is
Is screwed into the female screw 252 on the inner peripheral surface of the opening 221 side.
A pair of half-moon-shaped recesses 2 on the outer surface of the circular flange portion 250
A fitting 256 having a hexagonal head 255 on the ridge 254 between 53
Is attached, and the hexagonal head 255
Is engaged with the tool. A ring groove 257 is formed on the flange 250 side of the circular cylindrical portion 249, and an opening of the circular cylindrical portion 249 and the bottomed cylindrical main body 220 is formed by a rubber seal ring 258 mounted in the ring groove 257. 221 are sealed.

The circular cylindrical portion 249 has a circular concave portion 259 on the inner surface side thereof.
N communicating with each through hole 230 in cooperation with the end wall 224 of
An aCl aqueous solution circulation space 260 is formed. A plurality of protrusions 261 are arranged at equal intervals around the circular recess 259, and the end surface of each protrusion 261 is connected to the end wall 2 of the catalyst unit 219.
24. In the circular cylindrical portion 249,
An outer peripheral surface inside the male screw 251 is formed as a tapered surface 264, and the flow space 2 communicating with the outlet 232 is formed between the tapered surface 264 and the inner peripheral surface of the bottomed cylindrical body 220.
65 are formed. Space 266 between adjacent protrusions 261
Communicates between the two circulation spaces 260 and 265,
The two circulation spaces 260 and 265 and the space 266 are connected to the passage 23.
Form one.

The outer peripheral surface of the bottomed cylindrical main body 220 is provided with an outlet 2
32 having a through hole 267 communicating with the connector 32
8 and the connecting member 268 is connected to the pipe material 269 of the processing pipeline 33 as shown in FIG.

In the outer cylinder 218, the inlet 229 and the outlet 232 are disposed on both sides of the axis of the outer cylinder 218, respectively.

As clearly shown in FIG. 9, the chlorine gas purifying member 35 is tilted to the machine base 44 via the support base 208 such that the outflow port 232 is directed upward and the inflow port 229 is positioned downward. It is arranged to be. The tilt angle β in this case
Is used for replacing the catalyst unit 219 with the bottomed cylindrical main body 2.
When the NaCl aqueous solution 11 inside 20 is drawn out from the inlet 229 through the suction pump 34 and the drain pipe 211, the residual N
The liquid level of the aCl aqueous solution 11 is
It is set so as to be located below 1.

With the above configuration, the concave and convex fitting portions 228 and 22 between the outer cylinder 218 and the catalyst unit 219 are formed.
NaCl containing chlorine gas by labyrinth structure
The aqueous solution 11 is supplied from the inlet 229 to the catalyst unit 21.
9 and the bottomed cylindrical main body 2 of the outer cylindrical body 218
20 and the catalyst unit 21
Since the gas is surely introduced into the chamber 9, the purification rate of chlorine gas can be improved.

In this case, since the catalyst unit 219 is pressed against the bottom wall 222 of the outer cylinder 218 by the lid 223, the labyrinth structure is reliably formed and maintained.
Completion or incompletion of the labyrinth structure can be easily determined by the state of attachment of the lid 223 to the bottomed cylindrical main body 220. For example, the incompleteness of the labyrinth structure is confirmed by the seal ring 258 being visible from the gap between the flange 250 and the main body 220.

Furthermore, the chlorine gas purifying member 35 is connected to the outlet 2
As described above, the slanting portion 32 is inclined so that even if unpurified chlorine gas is present therein, it is possible to minimize the accumulation of chlorine gas.

In addition, since the outlet 232 is not provided in the cover 223, the cover 223 can be easily attached and detached, and the catalyst can be exchanged efficiently by uniting the catalyst and the unit. be able to. Even after the drainage, even if the lid 223 is removed from the bottomed cylindrical main body 220, the residual N from the opening 221 of the main body 220 due to the inclined arrangement.
The dripping of the aCl aqueous solution can be prevented.

Further, since both end walls 224 of the catalyst unit 219 have the same structure, the catalyst unit 21 has the same structure.
When fitting 9 into the bottomed cylindrical body 220 and fitting the annular projection 227 into the annular recess 228, the catalyst unit 219 may be fitted to the body 220 from any end wall 224 side. Therefore, the mounting workability of the catalyst unit 219 is good.

In the chlorine gas purifying member 35, the labyrinth structure may be omitted.

(4) Judgment device for judging catalyst replacement time (FIGS. 4 to 6, 39, and 40) The purification ability of activated carbon 226 used as a catalyst depends on the product of the current flowing through carbon electrode 13 and time. To decline. Therefore, before the purifying ability of the activated carbon 226 in use is completely lost, the activated carbon 226 is replaced with a new activated carbon 22.
6. In this example, the electrolysis tester 1 is provided with the present apparatus 270 to replace the catalyst unit 219. This device 270
Are incorporated in the computer program control device 10.

FIG. 39 is a block diagram of the judging device 270, and FIG. 40 is a flowchart showing the operation of the judging device 270. The “test condition setting” in FIG. 40 indicates whether to perform a corrosion resistance test including a coating film peeling step and a steel sheet corrosion step, to perform a coating film peeling test, to terminate the test,
Means that each condition is input.

Referring to FIG. 39, the judgment device 270
The purification capacity of the activated carbon 226 flows through the carbon electrode 13.
Some current I₁And its current I₁Can be used when continues to flow
Total test time T₁With product I₁・ T₁Effective current amount C
₁Capacity storage means 271 for storing the effective current amount C
₁Is the remaining effective current C_FourStorage means 276 for storing as
And the current I flowing through the carbon electrode 13 during the test._TwoMeasure
Measuring means (ammeter) 29 and test time T_TwoTo
The time measuring means 273 for measuring_TwoAnd during the test
Interval T_TwoWith product I_Two・ T_TwoThe amount of current used C_TwoCalculate
The first calculating means 274 and the remaining effective current amount C_FourUsed from
Current amount C_TwoTo calculate a new remaining effective current
And a second operation for storing it in the storage means 276
Means 275 and the maximum current I of the DC power supply 9 at the start of the test._Three
Input means 277 for inputting₁And test time T_ThreeRemember
Storage means 277_TwoAnd the maximum current I_ThreeAnd test time
T _ThreeWith product I_Three・ T_ThreeExpected current consumption C_FiveCalculate
And the remaining effective current amount C_FourExpected
Current consumption C_FiveAnd C_Four<C_FiveWhen the catalyst exchange
Control means 279 for transmitting a switching signal.

With such a configuration, it is possible to automatically detect that the purifying ability of the activated carbon 226 has decreased and the time to replace the activated carbon 226 has arrived before performing the test.

Further, the judging device 270 includes the control means 2
There are provided a message display means 280 for notifying that the catalyst replacement time has arrived based on a catalyst replacement signal from 79 and a prohibition means 281 for prohibiting energization of the carbon electrode 13.

As clearly shown in FIGS. 4 to 6, the message from the message display means 280 is displayed as characters on the liquid crystal display panel 131 provided on the upper surface of the left cover 52 covering the control section C. The prohibiting means 281 turns the DC power supply 9
It operates to maintain the F state. As a result, the tester can reliably know the time to replace the activated carbon 226.

As shown in FIG. 40, after replacing the catalyst unit 219, the judging device 270 resets the device 270 and resets the remaining effective current amount C ₄ of the storage means 276 to C ₄ = C _{4. It} is configured not to operate unless set to ₁ .

At the start of the test, if the relationship between the remaining effective current amount C ₄ and the expected use current amount C ₅ is C ₄ ≧ C ₅ , the test is started and the use current amount C ₂ is calculated.

[N] Exhaust device (1) Overall structure and operation (FIGS. 7 to 9, 41 to 4)
4) In the corrosion resistance test, chlorine gas is generated around the carbon electrode 13 as described above. Most of the chlorine gas is collected and purified by the chlorine gas treatment device 6 described in the above section [M], but part of the chlorine gas floats from the NaCl aqueous solution 11 and floats on the liquid level f. I do. This exhaust device 7
The electrolytic tester 1 is provided to collect suspended chlorine gas.

As clearly shown in FIGS.
The exhaust fan 39 of FIG.
And fixed on a mounting base 284 supported by the support 283. In the exhaust pipe 37, an exhaust fan 39
The suction pipe 285 extending from the suction port of the pierce through the right side wall 49 of the electrolytic cell 12 and communicates with the electrolytic cell 12 above the liquid level f of the NaCl aqueous solution 11. A synthetic resin cap-shaped grill 287 is detachably attached to an intake port 286 of the intake pipe 285. In the exhaust pipe 37, an exhaust pipe 288 extending from the outlet of the exhaust fan 39 extends downward and is opened to the atmosphere near the water distribution block 82.

At the suction side of the exhaust fan 39 of the exhaust pipe line 37, that is, at the suction pipe 285, an adsorption member 38 for adsorbing chlorine gas is disposed upstream thereof, and a detection means for detecting an abnormality in the exhaust system downstream thereof. 40 are provided. The adsorbing member 38 has a structure similar to that of the catalyst unit 219, and thus has activated carbon and air permeability, and is unitized. Therefore, the grill 287 is removed from the inlet 286 of the intake pipe 285, and the intake air is removed. It is installed in the intake pipe 285 from the port 286.

The detecting means 40 includes a synthetic resin detecting pipe 290 mounted between the intake pipe 285 and the electrolytic cell 12 and a water level sensor D attached to the detecting pipe 290, as clearly shown in FIGS. Prepare. The upper end of the detection pipe 290 communicates with the downstream part of the intake pipe 285, and the lower end communicates with the portion of the electrolytic tank 12 storing the NaCl aqueous solution 11. The sensor part of the water level sensor D is disposed above the liquid level f ₁ at the same level as the liquid level f of the electrolytic cell 12 in the detection pipe 290.

In the above configuration, when the exhaust fan 39 is operated, the chlorine gas floating above the liquid level f of the electrolytic cell 12 is adsorbed by the activated carbon when passing through the adsorbing member 38, and the clean air is exhausted by the exhaust pipe 288. Emitted to the atmosphere through

FIG. 43 shows the test time in the case where the chlorine gas treatment device 6 of the above item [M] was operated without operating the exhaust device 7, the test time in the case where the device 6 was deactivated, and the electrolytic cell. 12 shows the relationship with the chlorine gas concentration above the liquid level f in FIG.
The test conditions are 50 A continuous energization and a temperature of 45 ° C. of the NaCl aqueous solution 11. As is clear from FIG. 43, when the chlorine gas treatment device 6 is operated while the exhaust device 7 is not operating, the chlorine gas concentration can be kept extremely low. The concentration can be even lower.

Therefore, in order to confirm the effect of using activated carbon as the adsorbent of the exhaust device 7 and the adsorbing member 38, the outlet side of the exhaust pipe 288 is communicated with the electrolytic tank 12 above the liquid level f of the electrolytic tank 12. Then, a test was performed in which the inside air above the liquid level f was circulated through the adsorbent.

FIG. 44 shows the relationship between the test time and the chlorine gas concentration above the liquid level f in the electrolytic cell 12. The test conditions were 2
0 A continuous energization, and the temperature of the NaCl aqueous solution 11 was 45 ° C. In this case, since the exhaust fan 39 was not operated until the test time reached 50 hours from the start of the test, the chlorine gas concentration increased relatively sharply. At the time of 50 hours, the concentration was about 18 ppm. Thereafter, when the exhaust fan 39 is operated, the chlorine gas concentration is extremely reduced to 0.5 ppm or less by the purifying action of the adsorbent. Accordingly, in the case of the exhaust device 7 in which one end of the exhaust pipe 288 is opened to the atmosphere, the concentration of chlorine gas above the liquid level f in the electrolytic cell 12 and the concentration of chlorine gas discharged to the atmosphere are further reduced, and at least It is clear that it can be suppressed to 0.5 ppm or less.

In the above configuration, for example, if the suction member 38 is normal, a corresponding negative pressure is generated in the downstream portion, and the liquid level f ₁ in the detection tube 290 is changed by the negative pressure in FIG. As shown, it rises above the position of the water level sensor D. Thereby, the water level sensor D detects that the exhaust system is normal. On the other hand, during replacement of the adsorbing member 38, unless the new mounting forget of the suction member 38 which is disposed within the intake pipe 285, the negative pressure is significantly reduced than in the case of the liquid level f ₁ Is below the water level sensor D, and this state is detected by the water level sensor D.

As described above, according to the above configuration, it is possible to easily and reliably detect an abnormality in the exhaust system.

(2) Exhaust system abnormal point detector (FIG. 4 to FIG. 4)
6, 45-47) As shown in FIGS. 45 (a) and (b), the detection means 40
In the detection pipe 290, the first and second water level sensors D are provided at both positions indicating the lower limit L1 and the upper limit L2 of the rising water level L, respectively.
_1, by disposing the D _2, a function of transmitting an abnormality signal different by abnormal types of exhaust system. The type of the abnormality is determined by the first and second water level sensors D ₁ and D ₂ of the detecting means 40 based on the abnormal signal from the _first and second water level sensors D ₁ and D _2. The control means 291 for transmitting an output signal corresponding to the output signal is connected to the control means 291. The control means 291 is connected to a display means 292 for displaying the type of abnormality according to the output signal. Also, the control means 291
A prohibiting means 294 for prohibiting energization of the carbon electrode 13 by the output signal is connected.

These means 291, 292 and 294 are:
It is incorporated in the computer-programmed control device 10 and constitutes an abnormal point detector 295 in the exhaust system together with the _first and second water level sensors D ₁ and D ₂ . The display means 292
For example, a message is displayed, and the message is displayed as characters on a liquid crystal display panel 131 provided on the upper surface of the left side cover 52 covering the control unit C as clearly shown in FIGS. The prohibiting means 294 operates so as to maintain the DC power supply 9 in the OFF state.

[0208] As shown in Figs.
When the start signal is input, the first and second water level sensors D
₁, D_TwoDetects the water level corresponding to the negative pressure of the intake pipe 285.
You. The detected water level L3 is L₁≦ L3 <L2 tolerance
If it is in the box, the first water level sensor D ₁Is in the ON state,
The control means 291 controls the first water level sensor D₁Sends a normal signal
It is determined that the current is flowing through the carbon electrode 13.
The corrosion test is started.

If the detected water level L3 is L3 <L1, the first
The water level sensor D ₁ is in its OFF state, the control means 291
The first water level sensor D ₁ is not transmitting the normal signal, i.e. the abnormal signal have originated, the abnormality signal is determined to correspond to the inoperative non-mounting of the adsorbing member 38 and the exhaust fan 39, accordingly the output Send a signal. As a result, the display means 292 displays a message indicating that the test is stopped because the suction member 38 is not mounted or the exhaust fan 39 is not operated, and the prohibition means 294 prohibits energization of the carbon electrode 13.

If the detected water level L3 is L3 ≧ L2, the second
A water level sensor D ₂ is ON, the control unit 291 have originated the second water level sensor D ₂ is abnormal signal, the abnormality signal is determined to correspond to the clogging of the adsorbing member 38, accordingly the output Send a signal. Thereby, the display means 2
A message indicating that the test is stopped because the suction member 38 is clogged is displayed by the
As a result, energization of the carbon electrode 13 is prohibited.

The abnormal part detector 295 of the exhaust system is controlled to operate even during the corrosion test.

According to the detector 295, a failure point in the exhaust system can be easily and surely detected to accurately inform the tester, and the configuration is simple and relatively inexpensive.

[0213] Only the display means 292 may be connected to the control means 291. The water level sensor D
Instead of ₁ and D ₂ , it is also possible to use a diaphragm type negative pressure sensor, an air volume sensor, a wind speed sensor, or the like.

(3) Modified Example of Exhaust Device (FIG. 48) The synthetic resin detection tube 296 is provided with first and second tube portions 297 and 298 extending vertically and a third tube portion connecting their lower end portions. 299. The upper end portion of the first pipe portion 297 communicates with the downstream portion of the intake pipe 285, and the second pipe portion 298
Is connected above the liquid level f of the electrolytic cell 12 at a position lower than the upper end of the first pipe portion 297. Third tube section 299, water supply conduit 17 ₁ made of synthetic resin pipe material is connected, the water supply conduit 17 ₁ is connected to the cock 30 ₁ of water.

[0215] First tubular portion 297, that the same water level sensor D as the liquid level f ₁ located above is provided, also inside the float valve 300 is accommodated. 1st pipe part 29
The valve seat 301 of the float valve 300 is formed at a portion of the float valve 300 communicating with the intake pipe 285.

[0216] A flexible synthetic resin tube 302 is connected to the upper end of the second tube portion 298,
2 is suspended in the electrolytic cell 12. The tube 302 is used for supplying water to the electrolytic cell 12 and cleaning the electrolytic cell 12.

[0217] an intermediate portion of the water supply conduit 17 _1, the [D]
Solenoid valve 31 ₁ similar to the solenoid valve 31 as described in the section is provided. Water supply conduit 17 in the example by providing such a water supply conduit 17 ₁ is removed.

[0218] water supply to the electrolytic cell 12 is conducted through the detector tube 296 from the water supply conduit 17 _1, the liquid surface of the first tubular portion 297 f
₁ is a case where water is supplied from the bent upper end of the second pipe portion 298 to the electrolytic cell 12.
By overflowing within, it is defined in the same position as the liquid level f ₂ of that occasion bent upper end.

When water is substantially filled in the first pipe portion 297 due to water force, clogging of the tube 302, or the like during the supply of water to the electrolytic cell 12, the float valve 300 is seated on the valve seat 301 to move to the exhaust fan 39 side. Overflow is prevented. This is the same when the inside of the electrolytic cell 12 is washed by the tube 302.

The sensor section of the water level sensor D has a liquid level f _1.
As a result, the sensor is immersed in tap water, so that the sensor can be kept clean. Further, the chlorine gas floating above the liquid level f of the electrolytic cell 12 is prevented from leaking outside due to the trapping action of the detection tube 296.

[O] Overflow device having an intake function (FIGS. 7, 8, 13, 14, 49) This device 8 is a water level sensor 15 installed in the electrolytic cell 12 on the intake side corresponding to the exhaust device 7. Failed and N
When the aCl aqueous solution 11 exceeds a specified amount, the aCl aqueous solution 11 is provided in the electrolytic tester 1 to discharge the excess amount.

As shown in FIGS. 8, 13, and 49, the overflow pipe 41 has a bent pipe section 304 having a vertical section 303 along the outer surface of the rear wall 71 of the electrolytic cell 12, and an upper end of the vertical section 303. It is connected and has a horizontal inlet-side pipe portion 305 that has a larger diameter than the vertical portion 303 and is horizontal. The inlet-side tube 305 penetrates the rear wall 71 of the electrolytic cell 12 and communicates above the liquid level f. As shown in FIGS. 8 and 14, the lower end of the bent pipe portion 304 is connected to the drainage portion 82 b of the water distribution block 82.

In order to use the inlet-side tube portion 305 as an intake tube, a portion of the inlet-side tube portion 305 protruding from the electrolytic cell 12 is cut out in a substantially upper half from an outer end to an intermediate portion. Thereby, the air inlet 42 is formed in the inlet side pipe portion 305. A net 306 for removing foreign matter is stretched around the periphery of the intake port 42 so as to cover the intake port 42.

In the inlet side pipe section 305, the intake port 42
An adsorbing member 43 for adsorbing chlorine gas is disposed closer to the inflow port 307 side. The adsorbing member 43 has a structure similar to that of the catalyst unit 219, and thus has activated carbon, air permeability and water permeability, and is unitized.
The detachable synthetic resin cap-shaped grill 308 is removed from the side, and the inlet side pipe portion 3
05 is installed.

In the above configuration, NaC in the electrolytic cell 12
If the 1 aqueous solution 11 exceeds the specified amount, the excess amount is discharged from the inflow port 307 to the water distribution block 82 through the adsorption member 43 and the overflow pipe 41. In this case, since the NaCl aqueous solution 11 flows through the lower portion of the inlet-side tube portion 305, no overflow from the inlet port 42 occurs.

Intake of the electrolytic cell 12 with the operation of the exhaust device 7 is performed through the intake port 42 and the inlet-side tube portion 305. The leakage of the chlorine gas floating above the liquid level f to the outside of the electrolytic tank 12 in the inoperative state of the exhaust device 7 is prevented by the adsorption member 43.

[P] Another Example of Judgment Apparatus for Determining Time to Replace Carbon Electrode (FIGS. 4 to 6, 50, and 51) FIG. 50 is a block diagram of the judgment apparatus 123, and FIG.
1 is a flowchart showing the operation of the device 123. The "test condition setting" in FIG. 51 indicates whether to perform a corrosion resistance test including a coating film peeling step and a steel sheet corrosion step, to perform a coating film peeling test, or to terminate the test as in the above [I]. It means selecting and inputting each condition.

In FIG. 50, the judgment device 123
Some current I flowing through the carbon electrode 13 ₁And its current I₁
Available test time T when the flow continues₁With product I₁
・ T ₁Effective current amount C₁As the carbon electrode 13
Life storage means 124 for storing the service life of the
Quantity C₁Is the remaining effective current C_FourStorage means 3 for storing as
11 and the current I flowing through the carbon electrode 13 during the test._TwoTo
Current measuring means (ammeter) 29 for measuring and test time T
_TwoTime measuring means 125 for measuring the current I_TwoAnd try
Test time T_TwoWith product I_Two・ T_TwoThe amount of current used C_TwoIs calculated
Outgoing first computing means 132₁And the remaining effective current C_FourOr
Use current C_TwoTo calculate a new remaining effective current
And storing it in the storage means 311
2 operation means 310 and remaining effective current amount C at the start of test_Four
And evaluate C_FourA system that transmits an electrode exchange signal when ≤0
Control means 312.

With this configuration, it is possible to automatically detect the replacement time of the carbon electrode 13 which is a consumable electrode as the service life of the carbon electrode 13 expires.

In this case, the residual effective current amount C after the start of the test
_The test continues even if ₄ becomes C ₄ <0. This is permitted by the on a margin of a few times tested effective current amount C _1.

[0231] Further, the judgment device 123
2, a message display means 129 for notifying that the electrode replacement time has arrived, and a prohibition means 130 for prohibiting energization of the carbon electrode 13.

As clearly shown in FIGS. 4 to 6, the message from the message display means 129 is displayed on the liquid crystal display panel 131 provided on the upper surface of the left cover 52 covering the control section C in the same manner as in the above item [I]. Is displayed. Prohibition means 13
0 operates to maintain the DC power supply 9 in the OFF state. Thereby, the tester can know the replacement time of the carbon electrode 13 without fail.

As shown in FIG. 51, after performing the electrode replacement, the judging device 123 resets the device 123 to change the remaining effective current amount C ₄ in the storage means 311 to C ₄ = C
_It is configured not to operate unless set to ₁ .

At the start of the test, the remaining effective current amount C ₄ is C ₄ >
0 a long if test is initiated calculated and accumulated, etc. used current amount C ₂ is performed.

[0235] The judgment device 123 is provided with the carbon electrode 13
Is provided with a remaining effective current amount display means 313 for displaying the remaining effective current amount C ₄ . The remaining effective current amount display means 3
13 remaining effective current amount C ₄ according to the said (I) term and the liquid crystal display panel 131 in the same manner, the remaining effective current amount C _4, as shown in FIG. 24 is a bar graph displaying to reduce gradually. Thereby, the tester can easily know the remaining service life of the carbon electrode 13 and the status of change.

[Q] Judgment device for judging catalyst replacement time
Other examples (FIGS. 4 to 6, 52 to 55) (1) In FIG.
226, the current flowing through the carbon electrode 13
I₁And its current I₁All available tests when continually flows
Test time T₁With product I₁・ T₁Effective current amount C₁age
Storage means 271 for storing and storing
Current I flowing through pole 13_TwoCurrent measuring means (current
29) and test time T_TwoTime measuring means 2 for measuring
73 and the current I_TwoAnd test time T_TwoWith product I_Two・ T_Two
The amount of current used C_TwoCalculation means 274 for calculating
And the amount of current used C_TwoIntegrating means 314 for integrating
Current consumption C_ThreeMeans 315 for storing the effective current
Quantity C₁From the integrated current amount C _ThreeActivated carbon 226
Remaining effective current C_FourSecond computing means 316 for determining
Maximum ionization I of DC power supply 9 at the start of test_ThreeInput to enter
Means 277₁And test time T_ThreeStorage means 2 for storing
77_TwoAnd the maximum current I_ThreeAnd test time T_ThreeWith product I_Three
・ T_ThreeExpected current consumption C_FiveThe third operator that calculates
Step 278 and remaining effective current amount C_FourAnd expected current C_Five
And C_Four<C_FiveSend catalyst exchange signal when
Control means 279.

With such a configuration, it is possible to automatically detect that the purifying ability of the activated carbon 226 has decreased and the time for replacement thereof has arrived before performing the test.

In addition, the judgment device 270 is provided with the control means 2
There are provided a message display means 280 for notifying that the catalyst replacement time has arrived based on a catalyst replacement signal from 79 and a prohibition means 281 for prohibiting energization of the carbon electrode 13.

As clearly shown in FIGS. 4 to 6, the message displayed by the message display means 280 corresponds to the item [M] (4).
The characters are displayed on the liquid crystal display panel 131 provided on the upper surface of the left side cover 52 that covers the control unit C in the same manner as described above. The prohibiting means 281 operates so as to maintain the DC power supply 9 in the OFF state. As a result, the tester can reliably know the time to replace the activated carbon 226.

After the replacement of the catalyst unit 219, the judging device 270 does not operate unless the device 270 is reset and the integrated use current amount C ₃ of the storage means 315 is set to C ₃ = 0. Is done.

At the start of the test, if the relationship between the remaining effective current amount C ₄ and the expected use current amount C ₅ is C ₄ ≧ C ₅ , the test is started and the use current amount C ₂ is calculated.

(2) Referring to FIG.
0 indicates the purification capacity of the activated carbon 226 and the carbon electrode 13
Some current I flowing₁And its current I₁Used when
Total test time T available₁With product I₁・ T₁Is an effective
Flow rate C₁Ability storage means 271 for storing as
Current I flowing through the carbon electrode 13_TwoAmmeter to measure
Measuring means (ammeter) 29 and test time T_TwoWhen measuring
Measuring means 273 and the current I_TwoAnd test time T_TwoWith
Product I_Two・ T_TwoThe amount of current used C_TwoFirst operation for calculating
Means 274 and the amount of current used C_TwoIntegrating means 31 for integrating
4 and integrated current amount C_ThreeStorage means 315 for storing
And the maximum current I of the DC power supply 9 in the test. _ThreeEnter
Input means 227₁And test time T_ThreeHand to remember
Step 277_TwoAnd the maximum current I_ThreeAnd test time T_ThreeProduct with
I_Three・ T_ThreeExpected current consumption C _Five2nd act to calculate
Calculating means 317 and the effective current amount C₁From the expected current C
_FiveIs subtracted from the allowable current amount C of the activated carbon 226.₆Ask for
Third operation means 318, and an allowable current amount used at the start of the test.
C₆And integrated current amount C_ThreeAnd C₆<C_Threeof
Control means 319 for transmitting a catalyst exchange signal when
You.

With such a configuration, it is possible to automatically detect that the purifying ability of the activated carbon 226 has decreased and the time to replace the activated carbon 226 has arrived before performing the test.

In addition, the judgment device 270 is
There are provided a message display means 280 for notifying that the catalyst replacement time has arrived based on the catalyst replacement signal from 19 and a prohibition means 281 for prohibiting energization of the carbon electrode 13.

As clearly shown in FIGS. 4 to 6, the message displayed by the message display means 280 corresponds to the item [M] (4).
The characters are displayed on the liquid crystal display panel 131 provided on the upper surface of the left side cover 52 that covers the control unit C in the same manner as described above. The prohibiting means 281 operates so as to maintain the DC power supply 9 in the OFF state. As a result, the tester can reliably know the time to replace the activated carbon 226.

After the replacement of the catalyst unit 219, the judging device 270 is reset so that the judging device 270 does not operate unless the integrated current amount C ₃ of the storage means 315 is set to C ₃ = 0. Is done.

If the relationship between the allowable use current amount C ₆ and the integrated use current amount C ₃ at the start of the test is C ₆ ≧ C ₃ , the test is started and the use current amount C ₂ is calculated. (3) FIG. 54 is a block diagram of the determination device 270, and FIG. 55 is a flowchart showing the operation of the device 270. The "test condition setting" in FIG.
As in the case of the example, whether to perform a corrosion resistance test including a coating film peeling step and a steel sheet corrosion step, or to perform a coating film peeling test,
This means selecting whether to end the test and inputting each condition.

Referring to FIG. 54, the judgment device 270
The purifying ability of the activated carbon 226 is determined by the effective current amount C ₁ which is a product I ₁ · T ₁ of a certain current I ₁ flowing through the carbon electrode 13 and a total usable test time T ₁ when the current I ₁ continues to flow.
Capacity storage means 271 for storing as ₁ ;
Storage means 276 for storing ₁ as remaining effective current amount C ₄
If the product of the time measuring means 273 for measuring the current measuring means (ammeter) 29 and test time T ₂ to measure the current I ₂ flowing through the carbon electrode 13, and the current I ₂ and the test time T ₂ during the test a first calculating means 274 for calculating a used current amount C ₂ which is I ₂ · T _2, it calculates a new residual effective current amount by subtracting the used current amount C ₂ from the remaining effective current amount C ₄ The second operation means 275 stored in the storage means 276 is compared with the remaining effective current amount C ₄ and 0 value, that is, it is determined whether C ₄ ≧ 0 or C ₄ > 0, Control means 279 for transmitting a catalyst exchange signal when C ₄ <0.

With this configuration, it is possible to automatically detect that the purifying ability of the activated carbon 226 has deteriorated and that the time to replace the activated carbon 226 has come, before performing the test.

Further, the judgment device 270 is provided with the control means 2
There are provided a message display means 280 for notifying that the catalyst replacement time has arrived based on a catalyst replacement signal from 79 and a prohibition means 281 for prohibiting energization of the carbon electrode 13.

As clearly shown in FIGS. 4 to 6, the message displayed by the message display means 280 corresponds to the item [M] (4).
The characters are displayed on the liquid crystal display panel 131 provided on the upper surface of the left side cover 52 that covers the control unit C in the same manner as described above. The prohibiting means 281 operates so as to maintain the DC power supply 9 in the OFF state. As a result, the tester can reliably know the time to replace the activated carbon 226.

The judgment device 270 is provided with the second calculating means 27
And a remaining effective current amount display means 350 for displaying the remaining effective current amount C ₄ obtained by 5.

The second calculating means 275 calculates the remaining effective current C
₄ is calculated as C ₄ (A · h) = C ₄ −C ₂ . The remaining effective current amount C ₄ by the remaining effective current amount display means 350
, The liquid crystal display panel 131, as in the case remaining effective current amount C ₄ shown in FIG. 24 is a bar graph displaying to reduce gradually. As a result, the tester can easily know the remaining service life of the activated carbon 226 and the status of change. Note that, as shown in FIG.
After replacing the catalyst unit 219, the device 27
0 is reset and the remaining effective current amount C of the storage means 276 is reset.
_It is configured not to operate unless _{4 is set} to C ₄ = C ₁ .

If the relationship between the remaining effective current amount C ₄ and the 0 value at the start of the test is C ₄ ≧ 0, the test is started and the used current amount C ₂ is calculated. If the remaining effective current amount C ₄ after the start of the test is C ₄ <0, as shown in FIG. 55, the test is terminated forcibly.

[0255]

According to the present invention, the purifying ability of the catalyst is consumed to its limit or close to its limit, thereby improving the economic efficiency and greatly reducing the frequency of replacing the catalyst to improve the test operation efficiency. The resulting electrolysis tester can be provided. In addition, the catalyst can be replaced properly, and the working environment can be prevented from deteriorating due to forgetting to replace the catalyst.

[Brief description of the drawings]

FIG. 1 is a schematic view of an electrolytic tester.

FIG. 2 is a perspective view of a test body.

FIG. 3 is a sectional view taken along line 3-3 of FIG. 2;

FIG. 4 is a perspective view of an electrolytic tester.

FIG. 5 is a front view of the electrolysis tester, and corresponds to a view taken in the direction of arrow 5 in FIG.

6 is a view taken in the direction of arrow 6 in FIG. 5;

FIG. 7 is a vertical sectional front view of the electrolytic testing machine, corresponding to a sectional view taken along line 7-7 of FIG. 6;

8 is a fragmentary plan view of the electrolysis tester, taken along line 8-8 in FIG. 7;
It corresponds to a line sectional view.

FIG. 9 is a sectional view taken along line 9-9 of FIG. 7;

FIG. 10 is a perspective view showing a relationship between an electrolytic cell, a cover, and a hood.

FIG. 11 is a sectional view taken along line 11-11 of FIG. 7;

FIG. 12 is a sectional view taken along line 12-12 of FIG. 8;

FIG. 13 is a sectional view taken along line 13-13 of FIG. 7;

FIG. 14 is a piping diagram of an electrolytic tester.

FIG. 15 is a wiring diagram of an electrolytic tester.

FIG. 16 is a cross-sectional view showing a connection structure between a carbon electrode and a power supply line.

FIG. 17 is an explanatory diagram of a corrosion resistance test.

FIG. 18 is a perspective view showing a connection between a test body and a current-carrying terminal block.

FIG. 19 is a graph showing the relationship between the applied voltage and the width of peeling of the coating film from the damaged part.

FIG. 20 is a graph showing a relationship between a cycle and a peeling width of a coating film from a damaged portion.

FIG. 21 is a graph showing a relationship between a cycle and a maximum sheet thickness reduction amount.

FIG. 22 is a block diagram of a determination device for determining a replacement time of a carbon electrode.

FIG. 23 is a flowchart showing an operation of a determination device for determining a replacement time of a carbon electrode.

FIG. 24 is an explanatory diagram of a remaining effective current amount display portion.

FIG. 25 is a perspective view of a center cover.

FIG. 26 is a sectional view taken along line 26-26 of FIG. 6;

FIG. 27 is a sectional view taken along line 27-27 of FIG. 6;

FIG. 28 is a sectional view taken along line 28-28 of FIG. 7;

FIG. 29 is a sectional view taken along line 29-29 of FIG. 11;

FIG. 30 is a graph showing a first example of a relationship between a test time and an available chlorine concentration.

FIG. 31 is a graph showing a second example of the relationship between the test time and the available chlorine concentration.

FIG. 32 is a graph showing a third example of the relationship between the test time and the available chlorine concentration.

FIG. 33 is a block diagram of an abnormal point detector in the chlorine gas processing device.

FIG. 34 is a graph showing the relationship between the status of the processing system and the flow rate.

FIG. 35 is a flowchart showing the operation of the abnormal point detector.

FIG. 36 is a vertical sectional side view of the chlorine gas purifying member,
This corresponds to a sectional view taken along line 6-36.

FIG. 37 is an end view of the catalyst unit, and is a section taken on line 37-3 in FIG.
This corresponds to the view from arrow 7.

FIG. 38 is an end view of the lid, and corresponds to a view taken in the direction of arrows 38-38 in FIG. 36;

FIG. 39 is a block diagram of a first example of a determination device for determining a catalyst replacement time.

FIG. 40 is a flowchart showing an operation of a first example of a determination device for determining a catalyst replacement time.

FIG. 41 is a sectional view taken along line 41-41 of FIG. 9;

FIG. 42 is an explanatory diagram showing an example of an exhaust system abnormality occurrence detection means.

FIG. 43 is a graph showing an example of a relationship between a test time and a chlorine gas concentration.

FIG. 44 is a graph showing another example of the relationship between the test time and the chlorine gas concentration.

FIG. 45 shows an exhaust system abnormality point detector (a).
FIG. 3 is an explanatory diagram of an arrangement position of a water level sensor, and FIG.

FIG. 46 is a graph showing the relationship between the status of the exhaust system and the rising water level.

FIG. 47 is a flowchart showing the operation of the abnormal point detector.

FIG. 48 is an explanatory diagram showing another example of the abnormality occurrence detecting means of the exhaust system.

FIG. 49 is a sectional view taken along line 49-49 of FIG. 7;

FIG. 50 is a block diagram of another example of the judgment device for judging the replacement time of the carbon electrode.

FIG. 51 is a flowchart showing the operation of another example of the judgment device for judging the replacement time of the carbon electrode.

FIG. 52 is a block diagram of a second example of a determining device for determining a catalyst replacement time.

FIG. 53 is a block diagram of a third example of a determining device for determining a catalyst replacement time.

FIG. 54 is a block diagram of a fourth example of a determining device for determining a catalyst replacement time.

FIG. 55 is a flowchart showing the operation of a fourth example of the determining device for determining the catalyst replacement time.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electrolysis test machine 2 Specimen 9 DC power supply 11 NaCl aqueous solution (electrolyte solution) 12 Electrolysis tank 13 Carbon electrode (electrode) 226 Activated carbon (catalyst) 270 Judgment device 274 First operation means 275, 316, 317 Second operation means 276, 315 Storage means 278,318 Third calculation means 279,319 Control means 280 Message display means 281 Prohibition means 314 Accumulation means 350 Residual effective current amount display means

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kenji Mashimo 1-268 Hachisawa-cho, Kiryu-shi, Gunma Mitsuba Co., Ltd. Address Mitsuba Co., Ltd.

Claims (9)

[Claims] 1. An electrolyte (1) for immersing a test body (2).
Electrolyzer (12) for storing 1) and its electrolyte (11)
The electrode (13) immersed in the test piece (2)
DC power supply (9) that conducts current between electrode and electrode (13)
Purifying harmful gas generated from the electrolyte (11),
And the purifying capacity is an effective current amount C which is a product of current and time.₁
(226), and the catalyst (22)
And 6) a determination device (270) for determining the replacement time.
The determination device (270) calculates the effective current amount C₁To
Residual effective current C_FourStorage means (276) for storing as
And the amount of current C used in the electrode (13) during the test._Two
First calculating means (274) for calculating the remaining effective voltage.
Flow rate C_FourFrom the current consumption C_TwoSubtract new survivor
An effective current amount is calculated and stored in the storage means (27
6) the second operation means (275) to be stored in the memory and the test start
Sometimes the expected amount of current C_FiveThe third calculating means (27
8) and the remaining effective current amount C_FourAnd expected current C_Five
And C _Four<C_FiveSends a catalyst exchange signal when
Control means (279) for performing
Solution testing machine. 2. A message display means (2) for notifying that a catalyst replacement time has arrived based on a catalyst replacement signal from the control means (279).
The electrolysis tester according to claim 1, further comprising a prohibition means (281) for prohibiting power supply to the electrode (13). 3. An electrolyte (1) for immersing a test body (2).
Electrolyzer (12) for storing 1) and its electrolyte (11)
The electrode (13) immersed in the test piece (2)
DC power supply (9) that conducts current between electrode and electrode (13)
Purifying harmful gas generated from the electrolyte (11),
And the purifying capacity is an effective current amount C which is a product of current and time.₁
(226), and the catalyst (22)
And 6) a determination device (270) for determining the replacement time.
The determination device (270) determines whether the electrode (1) is being tested.
Current consumption C in 3)_TwoFirst calculating means for calculating
(274) and the amount of current used C_TwoIntegration means (3
14) and the accumulated current amount C_ThreeStorage means (3)
15) and the effective current amount C₁From the integrated current
C _ThreeIs subtracted to obtain the remaining effective current C of the catalyst (226).
_FourThe second computing means (316) for obtaining the
Assumed current C_FiveThird calculating means (278) for calculating
And the remaining effective current amount C_FourAnd expected current C_FiveAnd
By comparison, C_Four<C_FiveSends a catalyst exchange signal when
Electrolysis test having control means (279)
Test machine. 4. A message display means (2) for notifying that a catalyst replacement time has arrived based on a catalyst replacement signal from the control means (279).
The electrolytic tester according to claim 3, further comprising a prohibition means (281) for prohibiting the power supply to the electrode (80) and the electrode (13). 5. An electrolyte (1) for immersing a test body (2).
Electrolyzer (12) for storing 1) and its electrolyte (11)
An electrode (13) immersed therein; a DC power supply (9) energized between the test body (2) and the electrode (13); and a harmful gas generated from the electrolytic solution (11) during energization. ,
And an effective current amount C _1, which is a product of a current and a time.
(226), and the catalyst (22)
6) a determination device (270) for determining a replacement time, and the determination device (270) is provided with the electrode (1) under test.
A first calculating means for calculating a used current amount C ₂ in 3) (274), accumulating means (3 for integrating the current used amount C ₂
And 14), storage means for storing a cumulative use current amount C ₃ (3
15), the expected use current amount second calculating means for calculating the C ₅ and (317), the allowable use of the from the effective current amount C ₁ predicted using current amount C ₅ with the subtracted catalyst (226) in the test third arithmetic means for calculating a current amount C ₆ (318)
And a control unit (319) for comparing the allowable use current amount C ₆ and the accumulated use current amount C ₃ at the start of the test and transmitting a catalyst replacement signal when C ₆ <C _3. And electrolytic testing machine. 6. A message display means (2) for notifying that a catalyst replacement time has arrived based on a catalyst replacement signal from the control means (319).
The electrolytic tester according to claim 5, further comprising a prohibition means (281) for prohibiting the power supply to the electrode (13). 7. An electrolyte (1) for immersing a test body (2).
Electrolyzer (12) for storing 1) and its electrolyte (11)
An electrode (13) immersed therein; a DC power supply (9) energized between the test body (2) and the electrode (13); and a harmful gas generated from the electrolyte (11) during energization. ,
And an effective current amount C _1, which is a product of a current and a time.
(226), and the catalyst (22)
Comprising determination device for determining the replacement time of 6) and (270), the determination unit (270), storage means for storing said effective current amount C ₁ as a remaining effective current amount C ₄ (276)
And the amount of current C ₂ used in the electrode (13) under test.
First calculating means and (274), said storing means it calculates a new residual effective current amount by subtracting the used current amount C ₂ from said remaining effective current amount C ₄ to calculate the (27
A second computing means for storing (275) in 6), wherein the or the remaining effective current amount C ₄ is C ₄ ≧ 0, or to determine which is the C ₄ <0, when C ₄ <0, An electrolysis tester comprising: control means (279) for transmitting a catalyst exchange signal. 8. The message display means (2) for notifying that a catalyst replacement time has arrived based on a catalyst replacement signal from the control means (279).
The electrolysis tester according to claim 7, further comprising a prohibition means (281) for prohibiting the power supply to the electrode (80) and the electrode (13). 9. The remaining effective current amount C ₄ obtained by the second calculating means (275) is determined by the determination device (270).
The electrolytic tester according to claim 7 or 8, further comprising a remaining effective current amount display means (350) for displaying the following.