JPH09329566A - Electrolytic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrolytic equipment wherein a specimen is surely isolated from an electrode and an electric heater, and workability of maintenance is excellent. SOLUTION: The electrolytic equipment 5 has an electrolytic cell 12 storing electrolyte in order to dip a specimen 2, and an electrode 13 and an electric heater 14 which are dipped in the electrolyte 11. The electrolytic equipment 5 is provided with an electrode chamber 55 and a heater chamber 68 which are constituted of a peripheral all 47 of the electrolytic cell 12 and bulkhead plates 54, 67 which adjacently face the inner surface of the peripheral wall 47 and are detachable from the electrolytic cell 12. The electrode 13 is accommodated in the electrode chamber 55 and clamped by the peripheral wall 47 and the bulkhead plate 54. The electric heater 14 is accommodated in the heater chamber 68, and fixed on the peripheral wall 47.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrolysis device, and more particularly to an electrolysis device having an electrolysis tank for storing an electrolytic solution for immersing a test body, an electrode immersed in the electrolytic solution, and an electric heater.

[0002]

2. Description of the Related Art The above electrolyzer is used, for example, in a cathode peeling test of a coating film (see, for example, JP-A-7-195612). This test is performed by raising the temperature of the electrolytic solution and setting the polarity of the test body to the cathode and the polarity of the electrode to the anode.

[0003]

In this case, in the electrolysis apparatus, the test body is not in contact with the electrode and the electric heater during the test, and the size of the test body is relaxed. Has a sufficiently large installation space, and has good workability when performing maintenance such as cleaning inside the electrolytic cell, electrode replacement, and electric heater repair.
On the assumption that the electrodes will be replaced, it is required that the structure for supporting the electrodes be simple and strong.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide the electrolysis device which can satisfy the above various requirements.

According to the present invention to achieve the above object,
In an electrolysis device having an electrolytic bath for storing an electrolytic solution to immerse a test body, and an electrode and an electric heater immersed in the electrolytic solution, a peripheral wall of the electrolytic bath and an inner surface of the peripheral wall are closely opposed to each other. Along with the electrolytic chamber, an electrode chamber formed by a detachable partition plate and a heater chamber are provided, the electrode is housed in the electrode chamber and sandwiched by the peripheral wall and the partition plate, and the electric heater is There is provided an electrolytic device housed in a heater chamber and attached to the peripheral wall.

When the electrode and the electric heater are housed in the electrode chamber and the heater chamber, respectively, as described above, the contact between them and the test body can be reliably prevented and the electrode and the electric heater can be protected. In addition, since the partition plate is close to the peripheral wall of the electrolytic cell and the electrode chamber and the heater chamber use part of the peripheral wall as part of the chamber wall, when using another partition plate instead of the peripheral wall. Compared with, the installation space of the test body can be taken wider. Further, since the partition plate can be detached from the electrolytic cell and the electrode can be detached from the electrolytic cell accordingly, the partition plate and the electrode do not get in the way when performing maintenance such as cleaning in the electrolytic cell. Maintenance workability is improved. Moreover, since the electrode is sandwiched between the peripheral wall and the partition plate, the structure for supporting the electrode is simple and strong. Further, since the electric heater is attached to the fixed peripheral wall, its attachment structure is strong.

[0007]

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 the electrolysis device 5 is provided with a harmful gas treatment device 6 and an exhaust device 7 with an overflow device 8 having an intake function.

The electrolysis device 5 is a direct current power supply (constant voltage power supply, maximum voltage 20 V, maximum current 50 A) 9, a computer program type control device 10, an electrolytic cell 12 for storing a NaCl aqueous solution 11 as an electrolytic solution, and its It has a plate-like carbon electrode 13 which is a consumable electrode as an electrode for electrolysis immersed in a NaCl aqueous solution 11, an electric heater 14, a water level sensor 15 and a temperature sensor 16, a water supply pipe line 17, and a drain pipe line 18. .

Since the NaCl aqueous solution 11 is used as the electrolytic solution, chlorine gas as a harmful gas is generated during the test as the NaCl aqueous solution 11 is electrolytically decomposed. 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.

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

The test body 2 was suspended from a support bar 24 of the electrolytic cell 12 via a synthetic resin string 25, and the NaCl solution 11
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 controller 10 and is also 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 the tap 30 of the water supply which is the water supply source, and the other end is connected to the electrolytic cell 12.
An electromagnetic valve 31 is provided at an intermediate portion of the water supply pipe line 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 source,
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 treatment device 6 as a harmful gas treatment device has a treatment pipe 33 extending from the electrolytic cell 12, and an electric suction pump 34 and chlorine gas (hazardous gas) purification in the treatment pipe 33. A member 35 and a flow rate sensor 36 for detecting an abnormal portion are provided. The suction pump 34 is supplied with power from an external power supply.

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

Overflow device 8 having an intake 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 tester (FIGS. 4 to 9) The electrolysis tester 1 is configured to be movable, and the front side is the front part X in FIGS. The test work is performed from the front X side.

As shown in FIGS. 5 to 9, the electrolysis tester 1 is provided with a rectangular machine base 44, and a plurality of casters 45 as traveling wheels are attached to the lower surface of the machine base 44, respectively at four corners in the illustrated example, When the moving direction a of the machine base 44 is the longitudinal direction, that is, the left-right direction, the pulling / pushing hooks 46 are provided on both outer end surfaces of the machine base 44 in the moving direction a, that is, the left and right outer end surfaces, respectively.

On the machine base 44, along its 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 via a pair of attachment plates 50 protruding from the lower ends of the outer surfaces of the left and right side walls 48 and 49 of the peripheral wall 47. To be

The electrolytic cell 12, the mechanical section M and the control section C are
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. 7 and 9, the mechanical part M is
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.

Further, as clearly shown in FIGS. 7 and 8, the control unit C
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 construction, the electrolytic cell 12 is independent of the mechanical section M and the control section C, so that the electrolytic cell 1
2 can be made sufficiently large, so that restrictions on the size of the specimen 2 can be relaxed.

Further, 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 electrolysis tester 1 is mobile, it is possible to easily carry the tester 1 into and out of the test chamber.

Moreover, since the electrolytic cell 12 which is relatively large and heavy is arranged in the central portion, the electrolytic tester 1 is well balanced when it is moved.

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) In the lower left part of the electrolytic cell 12, the peripheral wall 4 of the electrolytic cell 12 is formed.
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 portion 48 of the peripheral wall 47 has a partition plate 56 made of synthetic resin which forms the rear wall of the electrode chamber 55, and the front wall portion 57 of the peripheral wall 47 forms the front wall of the electrode chamber 55. It has a convex strip 58 that faces 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 housed 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 projects 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 has the holding member 62.
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.

On 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 portion 57 is located above the liquid surface f of the NaCl aqueous solution 11 and in the middle portion in the left-right direction. A U-shaped support 74 is provided so as to project. 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.

As described above, when the carbon electrodes 13 and the electric heaters 14 are housed in the electrode chamber 55 and the heater chamber 68, respectively, the contact between the carbon nanotubes 13 and 14 and the test body 2 is surely prevented, and both carbons 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 made wider than in the case where another partition plate is used instead. 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. Moreover, since each carbon electrode 13 is sandwiched between the peripheral wall 47 and the partition plate 54, the supporting structure for 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] Water supply / drainage structure for the electrolytic cell (see FIGS.
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 port 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.
Two 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 arranged 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 supply of water to the electrolytic cell 12, the first and third detectors i and k are not electrically connected, and the solenoid valve 31 is controlled by the controller 10 to be in an open state. 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.
The amount of is controlled.

On the other hand, if the first detector i malfunctions during the test and water is not supplied even if the liquid surface f is separated from the lower end of the first detector i, the liquid surface f is further lowered. Thus, when the liquid level f is separated from the lower end of the second detector j, the second and third detectors j and k become 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 test body (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 body 74. The synthetic resin receiving member 88 is fixed so as to extend in the left-right direction.

Further, 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.

In FIGS. 11, 13 and 15, power supply lines 93 are connected to the upper front side and the upper rear side of the left and right carbon electrodes 13, and the two power supply lines 93 of each carbon electrode 13 are 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.

Further, referring to FIGS. 8, 13 and 15, the electrolytic cell 1
On the front wall 57 of No. 2, a titanium energization terminal block 98 used for connection with the test body 2 is provided below the receiving member 88 and in the vicinity of 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
It is arranged outside each of the two. 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 of Carbon Electrode and Feeding Line (FIG. 16) Each feeding line 93 includes a conducting wire 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.

The connection hole 107 may be a blind hole, but in the illustrated example, it is a through hole that extends diagonally and vertically, and the power supply line 93 and the connection bolt 106 are connected from the lower opening end o of the connection hole 107 to the connection hole. It is inserted into 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 existing between the lower open end o of the connection hole 107 and the end surface 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 conducting wire 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.
The terminal m of 04 is inserted and connected through 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. As a result, the NaC of the lead wire 104 protruding from the brass hollow cylindrical body 111 and the insulating coating layer 105 is reduced.
The watertightness of the aqueous solution 11 can be improved.

With the above construction, 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.

Further, since the connecting portion between the carbon electrode 13 and the conducting wire 104 of the power feeding line 93 is reliably sealed, the watertightness of the connecting portion with respect to the NaCl aqueous solution 11 should be greatly improved and corrosion of the connecting portion should be avoided. You can

Further, as described above, since the connecting portion has the excellent watertightness, the carbon electrode 13 can be immersed in the NaCl aqueous solution 11, whereby the upper portion of the carbon electrode is projected from the liquid surface. Thus, 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 connecting bolts 106 are screwed onto the female threaded portions n of the carbon electrode 13, the female threaded portions n and the connection bolts 106 are in close contact with each other. Can be reliably connected electrically.

Further, the connecting bolt 106 and the end portion of the power supply line 93 connected thereto are connected to the connecting hole 1 by the sealing 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 (see FIGS.
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 side 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.

For the corrosion resistance 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, the coating film peeling step is performed. 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 plate corrosion step, the amount of corrosion of the steel plate 3 is proportional to the amount of Coulomb energized, but even if the amount of Coulomb is the same, the amount of corrosion will be different if the coating film peeling area of the steel plate 3 is different.
The amount of coulomb required to corrode steel plate 3 is
It is determined based on the peeled area of the coating film.

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

FIG. 17 embodies the corrosion resistance test method, and the corrosion resistance test method will be described in detail below with reference to this figure.

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

Then, 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 sheet 3 is measured by the ammeter 29.

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

The current value I ₀ may be measured before the first coating film peeling step is started. 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) Peeling coating film removing step The test body 2 was taken out from the NaCl aqueous solution 11 and the peeling coating film 4a was removed from the test body 2 using an adhesive tape, whereby FIG. 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 switching relay 28 is used to test the polarities of both carbon electrodes 13 in the NaCl aqueous solution 11 to the anode and to test. The polarity of the steel plate 3 of the body 2 is set to the cathode, respectively, and a current is applied from the DC power source 9 between the carbon electrodes 13 and the steel plate 3 via the NaCl aqueous solution 11 at a constant voltage.

Then, in the same manner as described above, 5 to 10 from the start of energization
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 time, the peeling coating film 4a is formed by the subsequent energization as shown in FIG. 17 (iv).

(D) Coulomb amount setting step in steel plate corrosion Both current values I ₀ and I measured in the above steps (a) and (c)
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 concave portion 117 due to corrosion (anodic oxidation) is formed on the coating film peeling surface 3a of the steel sheet 3.
Corrosion products 118 accumulate in 17.

It is necessary to perform the first steel plate corrosion step without removing the release coating film 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) Peeling coating film and corrosion product removing step The test body 2 was taken out from the NaCl aqueous solution 11, and the peeling coating film 4a and the corrosion product 118 were removed from the test body 2 using an adhesive tape. Thus, as shown in FIG. 17 (vi), the coating film peeling surface 3a and the recess 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 second coating film peeling step to the peeling coating film and corrosion product removing step are repeated as a single 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 plate corrosion step, the peeling of the coating film 4 is hindered by the corrosion product 118. Therefore, a peeling coating film and a corrosion product removing step are performed between both steps. It is necessary to intervene.

Specific examples will be described below.

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., Ltd., 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. 18, the hole 115 of the test body 2 is
And a loop portion h was formed on the other end side. Corrosion resistant insulating coating layer 105 of power supply line 103
The conductor wire 104 protruding from the test piece 2 was soldered to the steel plate 3 on the surface opposite to the surface where the damaged portion 114 was present. 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 piece 2 with 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) Increase the concentration of the NaCl aqueous solution 11 to 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 coating peeling width s 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.

Further, at the same applied voltage, the amount of peeling of the coating film 4 is smaller in the test body 2 with pretreatment than in the test body 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.

[0091]

[Table 1]

(3) As a comparative example, a coating film 4 was prepared using the same pretreatment sample 2 and pretreatment sample 2 as described above.
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 and the damaged portion 114 when the cycles 1, 40, 60 and 80 of the comparative example correspond to the cycles 1, 2, 3 and 4 of the specific example, respectively. FIG. 17 is a graph showing the relationship with the coating 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 reduction in plate thickness in the specific example using the test body 2 with pretreatment.

[0095]

[Table 2]

FIG. 21 is a graph showing the relationship between each cycle similar to the above and the maximum 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 accelerate the peeling of the coating film 4 and the corrosion of the steel plate 3, and hence the metal material, and to carry out 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 current-carrying area changes. Therefore, when the service life of the carbon electrode 13 has expired, a new carbon electrode 1
This device 123 is provided in the electrolysis tester 1 in order to replace the device 3. This device 123 is incorporated in the computer program control device 10.

FIG. 22 is a block diagram of the judgment device 123, and FIG. 23 is a flow chart showing the operation of the 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 judging 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
Current I flowing through carbon electrode 13₂Current measurement to measure
Means (ammeter) 29 and test time T₂Time to measure
Measuring means 125;₂And test time T₂Product of
I₂・ T₂The amount of current used C₂First operator to calculate
Step 132₁And the amount of current used C₂Accumulate the carbon electrode
Use current amount C from the start of use of No. 13_ThreeTo calculate
Integrating means 126 and integrated use current amount C_ThreeRemember
Means 127 and said effective current amount C at the start of the test.₁And multiplication
Current consumption C_ThreeAnd C₁<C_ThreeWhen the electrode exchange
Control means 128 for transmitting a switching signal. like this
When configured to, the use of the carbon electrode 13 which is a consumable electrode is used.
Automatically detect the replacement time as the service life reaches
It is possible.

In this case, the test is continued even if the relationship between the effective current amount C ₁ and the cumulative used current amount C ₃ becomes 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 has 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 displayed by the message display means 129 is displayed in characters on the liquid crystal display plate 131 provided on the upper surface of the left side 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, the judgment device 123 resets the device 123 after replacing the electrodes and resets the device 123 so that the cumulative current amount C ₃ stored in the storage means 127 is C ₃ = 0.
It is configured not to operate unless it is

At the start of the test, if the relationship between the effective current amount C ₁ and the integrated current amount C ₃ is C ₁ ≧ C ₃ , the test is started and the used current amount C ₂ is calculated and integrated.

[0107] The judging device 123 uses 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

[0108] 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 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 life of the carbon electrode 13 and the state of change.

It should be noted that the effective current amount C ₁ and the cumulative used 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 Openings in Electrolyzer (FIGS. 6-10, 13, 25-27) 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 central 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 central 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 peripheral frame-shaped portion 146 and a recess 147 surrounded by the outer peripheral frame-shaped portion 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 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. 7, 10, 25, and 26.
The left and right side walls of the recess 147₁, U ₂Is 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, U₂Outer 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.

Further, as clearly shown in FIGS. 7, 10, 13, and 27, the lower surface of the bottom wall front portion t ₃ in the shallow recess 148 is the sealing 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.

Thus, 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 Lid Body and Collection Structure of Water Droplets Attached to Inner Surface of Lid Body (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, the drain holes 157, 15 are provided on the right end sides of the bottom surfaces 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. 4, 5, 13, and 27,
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.

A pair of stainless steel brackets 162 arranged at a predetermined interval on the inner surface side of the steel plate 161, and the steel plate 1
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 support shaft 167 extends in the left-right direction in a substantially central region of the deep recess 149, and both ends thereof are left and right walls u _{1 of} the recess 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 shown in FIGS. 7, 9 and 28, the right end portion of the support shaft 167 protruding from the right side wall portion 49 of the electrolytic cell 12 penetrates the upper end portion of the link 171 and the short cylindrical body 172 fixed thereto. It is fixed to the short cylindrical body 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.

Cylinder body 175 of 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 portion 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 structure, 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 are deeply recessed 149 in the annular trough 153 from the rear edge 161a side. It hangs inside and is 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 lower portion of the front wall portion 149a forming the deep recess 149 in the central cover 51, and the L-shaped plate 189 is attached. The narrow groove 190 is formed by the cooperation of the 189 and the front wall portion 149a. 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] Coupling Structure of Central Cover and Left and Right Covers (FIGS. 6 to 8, 25 and 26) Central cover 51 covering the front side, upper side and rear side of electrolytic cell 12 and its central cover The left side cover 52, which is adjacent to 51 and covers the control section C, has a coupling structure 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.

With the center cover 51 fixed to the machine base 44, the left side cover 52 is provided with the concave groove 192 in the center cover 51 at the front and rear lower ends of the ridges 193.
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 structure, 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 joints between the central cover 51 and the left and right side covers 52 and 53 is received in the concave grooves 192 and discharged downward.

Further, in maintenance of 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 central 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.

As a result, the workability of the electrolytic cell 12, the mechanical section M, and the control section C can be improved during maintenance.

[M] Chlorine Gas Treatment Device (1) Overall Structure and Operation (FIGS. 4, 7-11, 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 to purify chlorine gas. The chlorine gas generated by the electrolysis of the NaCl aqueous solution 11 is extracted from the NaCl aqueous solution 11 together with the NaCl aqueous solution 11. It has a function of collecting, a function of decomposing NaClO which is a reaction product of chlorine gas and an aqueous solution of NaCl to generate NaCl, and a function of returning the NaCl to the electrolytic cell 12.

The chlorine gas treatment device 6 will be specifically described below. 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 conduit 33 penetrates through the bottom wall 83 of the electrolytic cell 12, and the suction pipe 201, which is the end thereof, is provided upright 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 side of the projecting plate 61 existing in the left side wall portion 48 of the electrolytic cell 12, and is fitted into the through hole 205 of the annular body 204 projecting on the upper rear surface of the projecting plate 61. They are combined and supported by the electrolytic cell 12 in an immovable state.

The right electrode chamber 55 is also provided with the same chlorine gas collecting hood 194, suction pipe 201, etc. 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 has a 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
However, the NaCl aqueous solution 1
Each is opened to the part where 1 is stored.

As clearly shown in FIGS. 9 and 14, a suction pump 34 is provided in the processing line 33 in the mechanical 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 drainage pipe 211 is branched from the suction side of the suction pump 34 of the processing pipe 33, and the drainage pipe 211 has a manual cock 212 in an intermediate portion and also has a drainage 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 purification member 35 has a filter and a catalyst therein, and the catalyst adsorbs chlorine gas and decomposes NaClO which is a reaction product of chlorine gas and the NaCl aqueous solution 11 to generate NaCl. Have the function to The NaClO is used for coating 4 due to its bleaching action.
Is whitened, and the appearance of the coating film 4 is significantly different from the corrosion state in the natural environment. Therefore, it is a harmful compound in the corrosion resistance test.

With the above construction, the N in the electrolytic cell 12 is
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 foamy chlorine gas generated in the vicinity of each carbon electrode 13 floats up in the NaCl aqueous solution 11 and is smoothly guided to the suction port 202 in a foamy state by the guide action of the chlorine gas collecting hood 194. In addition, the two baffle plates 203 also have a function of preventing the chlorine gas from avoiding the suction port, so that the suction port 202 is efficiently sucked into the processing conduit 33. 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.

As a result, an aqueous solution of chlorine gas in NaCl 11
Since the diffusion into NaCl can be suppressed, the generation of NaClO and the dissolution of chlorine gas in the NaCl aqueous solution 11 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 and granular nickel as catalysts used in the chlorine gas purification member 35. In the figure, the effective chlorine concentration is a quantitative value of chlorine gas dissolved in the NaCl aqueous solution 11 (JIS K142).
5). In the measurement, the temperature of the NaCl aqueous solution 11 was maintained at 45 ° C., and the current was continuously applied at 50 A for 20 hours.
A method was adopted in which the catalyst was added to the collected NaCl aqueous solution kept at 0 ° C., and the effective chlorine concentration was determined every predetermined time. As is clear from FIG. 30, 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 available chlorine concentration when activated carbon was 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 device 6, since the flow rate of the NaCl aqueous solution 11 flowing on the downstream side of the chlorine gas purification member 35 is measured by the flow rate sensor 36, for example, the chlorine gas purification member 35 may be normal without clogging. For example, the flow sensor 36 measures a 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.

As described above, according to the above configuration, it is possible to easily and surely detect the abnormality of the processing system. 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 of the processing system (Fig.
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.

Further, a storage means 215 is connected to the control means 213, and as shown in FIG. 34, the storage means 215 previously stores 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. The range A2 ≦ Q ≦ A1 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 the 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 rate sensor 36 operates in the processing conduit 33.
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 indicates that the flow rate sensor 36 has issued an abnormal signal, and that the abnormal signal corresponds to the chlorine gas purifying member 35 not mounting the catalyst. It discriminates and outputs an output signal according to the discrimination. 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 measured flow rate Q _{1 of 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 so as to operate even during the corrosion resistance test.

According to the detector 217, it is possible to easily and surely detect the faulty part of the processing system and notify the tester appropriately, and since the structure is simple, it is relatively inexpensive.

(3) Chlorine gas purifying member (see FIGS. 7, 9 and 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.

One end wall 224 and one of the bottom walls 222 of the bottomed cylindrical main body 220, which faces the one end wall 224, the annular projection 227 present on the end wall 224 in the illustrated example 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 with a plurality of bolts 234 and constitutes 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.

On the inner surface side of the circular end plate 235, a circular recess 239 located inside the annular recess 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, which are attached to the openings at both ends thereof to form end walls 224.
It consists of two. The circular end plate 242 has an outer plate 243 and an 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 body 223 has a circular tubular portion 249 and a circular flange portion 250 which is continuously provided on the outer end side of the circular tubular 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, and the circular concave portion 259 and the catalyst unit 2
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.

On the outer peripheral surface of the bottomed cylindrical main body 220, the outflow port 2 is provided.
32 having a through hole 267 communicating with the connector 32
8 is joined, and the pipe 269 of the processing pipe line 33 is connected to the connection body 268 as shown in FIG.

In the outer cylinder 218, the inflow port 229 and the outflow port 232 are arranged on both sides of the outer cylinder 218 with respect to the axis.

As clearly shown in FIG. 9, the chlorine gas purification member 35 is inclined to the machine base 44 via the support base 208 so that the outflow port 232 faces upward and the inflow port 229 is located at the lower side. It is arranged. 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-mentioned structure, the concave-convex fitting portions 228, 22 of the outer cylinder 218 and the catalyst unit 219.
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 cylindrical body 218 by the lid 223, the labyrinth structure is surely constructed 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.

Further, the chlorine gas purifying member 35 has 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.

Moreover, since the lid body 223 is not provided with the outflow port 232, the lid body 223 can be easily attached and detached, and by combining this with the catalyst unitization, the catalyst replacement work can be performed efficiently. 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, in the catalyst unit 219, the both end walls 224 have the same structure, so that the catalyst unit 21
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 the catalyst replacement timing (FIGS. 4 to 6, 39, 40) The purification capacity of the activated carbon 226 used as a catalyst depends on the product of the current flowing through the carbon electrode 13 and the time. Decrease. 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 judgment device 270, and FIG. 40 is a flow chart showing the operation of the 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.

In FIG. 39, the judging device 270 is
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 C₁Activated carbon 226
Storage means 271 for storing the conversion capacity, and 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.₂Measure
Measuring means (ammeter) 29 and test time T₂To
The time measuring means 273 for measuring₂And during the test
Interval T₂With product I₂・ T₂The amount of current used C₂Calculate
The first calculating means 274 and the remaining effective current amount C_FourUsed from
Current amount C₂To 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 277₂And 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 this configuration, it is possible to automatically detect that the purification capacity of the activated carbon 226 has decreased and the replacement time has come before the test.

Further, the judging device 270 has 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 by the message display means 280 is displayed in characters on the liquid crystal display plate 131 provided on the upper surface of the left side cover 52 which covers 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, the determining device 270 resets the device 270 after replacing the catalyst unit 219 and sets the remaining effective current amount C ₄ in the storage means 276 to C ₄ = C _4. Configured to not work unless set to ₁ .

At the start of the test, if the relationship between the remaining effective current amount C ₄ and the expected used current amount C ₅ is C ₄ ≧ C ₅ , the test is started and the used 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. 9 and 41, the exhaust device 7
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.

In the suction side of the exhaust fan 39 of the exhaust pipe line 37, that is, in the intake pipe 285, an adsorbing member 38 for adsorbing chlorine gas is arranged in the upstream part, and a detecting means for detecting an abnormality in the exhaust system in the downstream part. 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.

As shown in FIGS. 41 and 42, the detection means 40 includes a detection tube 290 made of synthetic resin mounted between the intake pipe 285 and the electrolytic cell 12 and a water level sensor D attached to the detection tube 290. 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 structure, when the exhaust fan 39 is operated, the chlorine gas floating above the liquid surface f of the electrolytic cell 12 is adsorbed by the activated carbon when passing through the adsorbing member 289, and clean air is discharged into the exhaust pipe 288. Through the atmosphere.

FIG. 43 shows the test time when the chlorine gas treatment device 6 of the above [M] is operated without operating the exhaust device 7 and when the device 6 is inactivated, and the electrolytic cell. The relationship with the chlorine gas concentration above the liquid level f in 12 is shown.
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 inside of the electrolytic cell 12 above the liquid level f of the electrolytic cell 12. Then, a test was conducted in which the inside air above the liquid surface 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 from the start of the test to 50 hours after the start of the test, the chlorine gas concentration rises relatively rapidly, and at 50 hours, the concentration becomes 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 structure, for example, the suction member 289
Is normal, a negative pressure corresponding to that is generated in the downstream portion, and the negative pressure causes the liquid level f ₁ in the detection tube 290 to be equal to or higher than the position of the water level sensor D as shown by the chain line in FIG. 42. To rise. Thereby, the water level sensor D detects that the exhaust system is normal. On the other hand, when the suction member 289 is replaced, the intake pipe 28
If it is not arranged within the liquid level sensor 5, the negative pressure is much lower than in the above case, so 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 structure, it is possible to easily and surely detect the abnormality of the exhaust system.

(2) Abnormal point detector in the exhaust system (Fig.
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 to 294 are incorporated in the computer program type control device 10 to provide the first and second means.
Together with the second water level sensors D ₁ and D ₂ , an abnormal point detector 295 of the exhaust system is configured. The display means 292 displays, for example, a message.
Characters are displayed on a liquid crystal display panel 131 provided on the upper surface of the left side cover 52 that covers the control unit C as clearly shown in FIG. The prohibiting means 294 operates so as to maintain the DC power supply 9 in the OFF state.

As shown in FIGS. 45 and 47, when the test start signal is input, the first and second water level sensors D ₁ and D
₂ detects a water level corresponding to the negative pressure of the intake pipe 285. If the detected water level L3 is within the allowable range of L ₁ ≦ L3 <L2, the first water level sensor D ₁ is in the ON state, and the control means 291 sends the normal signal to the first water level sensor D ₁ Therefore, the carbon electrode 13 is energized to start the corrosion resistance test.

If the detected water level L3 is L3 <L1, then 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 this exhaust system is controlled so as to operate even during the corrosion resistance test.

According to the detector 295, it is possible to detect the failure part of the exhaust system easily and surely to notify the tester appropriately, and since the structure is simple, it is relatively inexpensive.

It should be noted that 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 pipe 296 is a third pipe portion connecting the first and second pipe portions 297 and 298 extending in the vertical direction and their lower end portions. And 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.

A water level sensor D similar to the above is provided in the first pipe portion 297 so as to be located above the liquid level f ₁ , and a float valve 300 is housed inside. 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.

A flexible synthetic resin tube 302 is connected to the upper end portion 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.

[D] is provided in the middle of the water supply line 17 _1.
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.

Water is supplied to the electrolytic cell 12 from the water supply line 17 ₁ through the detection pipe 296, and the liquid level f of the first pipe portion 297 is increased.
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, etc., during the water supply to the electrolytic cell 12, the float valve 300 is seated on the valve seat 301 and is directed 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.

Further, the sensor part 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 Intake Function (FIGS. 7, 8, 13, 14, 49) This device 8 is the intake side corresponding to the exhaust device 7 and the water level sensor 15 installed in the electrolytic cell 12. Broke down 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 clearly shown in FIGS. 8, 13, and 49, the overflow pipe 41 includes a bent pipe portion 304 having a vertical portion 303 along the outer surface of the rear wall portion 71 of the electrolytic cell 12, and an upper end of the vertical portion 303. It is connected and has a horizontal pipe 305 having a diameter larger than that of the vertical portion 303 and 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 pipe portion 305 also as an intake pipe, in the portion of the inlet-side pipe portion 305 protruding from the electrolytic cell 12, the upper half from the outer end to the intermediate portion is cut out. As a result, the intake port 42 is formed in the inflow port 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 tube portion 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 structure, 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.

Further, the air is taken into the electrolytic cell 12 by the operation of the exhaust device 7 through the intake port 42 and the inlet side pipe 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] Other Examples of Judgment Device for Judging Replacement Time of Carbon Electrode (FIGS. 4 to 6, 50, 51) FIG. 50 is a block diagram of the judgment device 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 judging 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.₂To
Current measuring means (ammeter) 29 for measuring and test time T
₂Time measuring means 125 for measuring the current I₂And try
Test time T₂With product I₂・ T₂The amount of current used C₂Calculate
Outgoing first computing means 132₁And the residual effective current amount C_FourOr
Use current C₂To 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 structure, it is possible to automatically detect the replacement time of the carbon electrode 13, which is a consumable electrode, as it reaches the end of its service life.

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.

Further, the judging device 123 has a control means 31.
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 displayed by the message display means 129 is displayed on the liquid crystal display plate 131 provided on the upper surface of the left side cover 52 which covers the control section C as in the above [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, the determining device 123 resets the device 123 after replacing the electrodes and resets the remaining effective current amount C ₄ of the storage means 311 to C ₄ = C _4.
It is configured not to operate unless set to ₁ .

At the start of the test, the residual 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.

[0223] The judgment device 123 is 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 life of the carbon electrode 13 and the state of change.

[Q] Judgment device for judging catalyst replacement timing
Other Examples (FIGS. 4 to 6, 52, 53) (1) In FIG. 52, the determination device 270 is a carb
Current I flowing through the electrode 13₁And its current I₁Flows
Total test time T available when continued₁With product I ₁・ T₁
Effective current amount C₁As the purification capacity of activated carbon 226
Capacity storage means 271 for storing the
Current I flowing through pole 13₂Current measuring means (current
29) and test time T₂Time measuring means 2 for measuring
73 and the current I₂And test time T₂With product I₂・ T₂
The amount of current used C₂Calculation means 274 for calculating
And the amount of current used C₂Integrating means 314 for integrating
Current consumption C_ThreeStorage means 315 for storing
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
77₂And 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.

According to this structure, it is possible to automatically detect that the purification capacity of the activated carbon 226 has declined and the replacement time has come before the test.

Further, the judgment device 270 has 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 is the same as 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 determination device 270 is configured so as not to operate unless the catalyst unit 219 is replaced and then the device 270 is reset to set the cumulative operating current amount C ₃ of the storage means 315 to C ₃ = 0. To be done.

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

(2) In FIG. 53, the judgment device 27
0 is a certain current I flowing through the carbon electrode 13₁And that
Flow I₁Available test time T when the flow continues₁With
Product I ₁・ T₁Effective current amount C₁Activated carbon 22
6, capacity storage means 271 for storing the purification capacity, and during the test
Current I flowing through the carbon electrode 13₂Ammeter to measure
Measuring means (ammeter) 29 and test time T₂When measuring
Measuring means 273 and the current I₂And test time T₂With
Product I₂・ T₂The amount of current used C₂First operation for calculating
Means 274 and the amount of current used C₂Integrating 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 277₂And the maximum current I_ThreeAnd test time T_ThreeProduct of
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 226.₆Seeking
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.

According to this structure, it is possible to automatically detect that the purifying ability of the activated carbon 226 has decreased and the replacement time has come before the test.

Further, the judging device 270 has the control means 3
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 is the same as in 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 determining device 270 is configured so as not to operate unless the device 270 is reset after the catalyst unit 219 is replaced to set the cumulative current consumption C ₃ of the storage means 315 to C ₃ = 0. To be done.

At the start of the test, if the relationship between the allowable used current amount C ₆ and the integrated used current amount C ₃ is C ₆ ≧ C ₃ , the test is started and the used current amount C ₂ is calculated.

[0236]

According to the present invention, the test body is reliably separated from the electrodes and the electric heater, the electrodes and the electric heater are protected, the installation space of the test body in the electrolytic cell is enlarged, and the maintenance work is further performed. It is possible to provide an electrolysis device that has good properties and, moreover, has a simple and strong electrode support structure and a strong electric heater mounting structure.

[Brief description of 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, corresponding to the views as seen from arrows in FIGS.

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.

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

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 a view of the catalyst unit as viewed from arrows in FIGS. 36 and 37-37.

FIG. 38 is a view of the lid taken along arrows in FIGS. 36 and 38-38.

FIG. 39 is a block diagram of a judgment device for judging the catalyst replacement timing.

FIG. 40 is a flowchart showing the operation 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 another example of a determination device that determines the catalyst replacement timing.

FIG. 53 is a block diagram of still another example of the determination device for determining the catalyst replacement timing.

[Explanation of symbols]

 2 Specimen 5 Electrolyzer 11 NaCl aqueous solution (electrolyte) 12 Electrolyzer 13 Carbon electrode (electrode) 14 Electric heater 47 Peripheral wall 54,67 Partition plate 55 Electrode chamber 68 Heater chamber

 ─────────────────────────────────────────────────── --- Continuation of the front page (72) Shigeru Akutsu Inventor Mitsuba Electric Co., Ltd. 1-chome, Hirosawa, Kiryu-shi, Gunma Prefecture (72) Keiji Kiuchi 1-chome, Hirosawa-machi, Kiryu-shi, Gunma 268 8 Ichibanchi Mitsuba Electric Co., Ltd. (72) Inventor Kenji Mashita 1-chome, Hirosawa-cho, Kiryu-shi, Gunma Prefecture 26 8 Ichibanchi Mitsuba Electric Co., Ltd. (72) Inventor Atsushi Tsunezaki Mitsuba Electric Mfg. Co., Ltd.

Claims (1)

[Claims] 1. An electrolyte (1) for immersing a test body (2).
Electrolyzer (12) for storing 1) and its electrolyte (11)
Electrode (13) and electric heater (14) immersed therein
In the electrolysis device having: the partition wall (5) that is opposed to the peripheral wall (47) of the electrolytic cell (12) in close proximity to the inner surface of the peripheral wall (47) and is removable from the electrolytic cell (12).
4, 67), and an electrode chamber (55) and a heater chamber (68), and the electrode (13) is housed in the electrode chamber (55) and the peripheral wall (47) and a partition plate (). 5
4) and the electric heater (14) is housed in the heater chamber (68) and is surrounded by the peripheral wall (47).
An electrolyzer which is attached to.