CN1195715A - Electric corrosion-proof method and device for metal equipment - Google Patents

Electric corrosion-proof method and device for metal equipment Download PDF

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Publication number
CN1195715A
CN1195715A CN97120857A CN97120857A CN1195715A CN 1195715 A CN1195715 A CN 1195715A CN 97120857 A CN97120857 A CN 97120857A CN 97120857 A CN97120857 A CN 97120857A CN 1195715 A CN1195715 A CN 1195715A
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mentioned
thing
metal
water
anode
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高桥正浩
高桥靖彦
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Kinan Corp.
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TAC Corp
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Priority claimed from JP9054875A external-priority patent/JPH10251879A/en
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/04—Controlling or regulating desired parameters
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
    • C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
    • C23F13/20—Conducting electric current to electrodes
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F2201/00—Type of materials to be protected by cathodic protection

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Prevention Of Electric Corrosion (AREA)

Abstract

The invention provides a electrically anticorrosion method and device for preventing metal structure exposed to the atmosphere or water pipe through simple and cheap system.Mounting an anode on a coated surface of a metal structure exposed to the atmosphere; connecting a cathode to a main body of the metal structure; connecting the anode and the cathode to a solar battery; whereby when a defective part is generated on the coated surface of the metal structure and water film is formed on the coated surface, establishing a corrosive condition of the metal structure, a current is automatically flowed between the anode and the cathode to prevent corrosion of the metal structure.

Description

Metal is provided with the electric corrosion-proof method and the device of thing
The invention relates to the invention that metal is provided with the electric corrosion-proof method and the device of thing, be that electricity consumption prevents buildings metal roof, metope, or metal system bridge member etc. is exposed to the metal structure in the atmosphere, and perhaps metal such as metal system water-supply pipe is provided with the invention of thing generation corroding method and device.
Now, the metal that adopts in the living environment is provided with thing to be had, for example buildings metal roof, metope, or metal system bridge member etc. is exposed to the metal structure in the atmosphere, perhaps metal system water-supply pipe etc.Self-evident, the corrosion protection of thing is set is an important problems to very useful metal in the current living environment of this class.
For metal structures such as buildings metal roof, prevent the painted surface generation corrosive anodic protection of this metal structure and (the flat 3-306342 of Japanese Patent Application number) commodity device that there is Xi Aierai system house (U.S.) exploitation in the cathodic protection system.
This corrosion protective device can be to being exposed in the atmosphere, can bringing into play with the metal structure of protection by paints and lacquers and effectively prevent the corrosive effect, but keep away unavoidable following four problems.Specifically,
(1) though it can control its output by best volts DS by control device, and give a plurality of anode supplies by lead, because the difference of the conductor spacing of anode construction or the difference of wiring, each anodic voltage may not be optimum value.And, as overtension, will produce corrosion protection over-drastic problem, brownout, then corrosion protection scope is too narrow.
(2) the control device input is 100 volts or 200 volts of alternating-current, and for the metal structure in the explosion-proof district is carried out corrosion protection, control device and lead must meet explosion-proof specification, must be considered specially during construction, can have problems economically.
(3) exist the possibility that causes the outage of corrosion protection electric current because of wire fracture.
(4) do not have 100 volts or 200 volts of AC power as neighbouring, must grow the distance power supply that induces one.
Below, we investigate the corrosion protection problem that metal is provided with water-supply pipe in the thing.
Consider that from the relation of price, quality water pipes such as water-supply pipe, heat supply water pipe all adopt iron pipe usually.Problem is that the time one is long, will get rusty in the iron pipe the inside, and water generates is red muddy in the water pipe, and then smelly, spoiled.Promptly produce the rubescent problem of so-called water colour.The rubescent phenomenon of this water colour, not only can make in the water pipe water become muddy, and can be simultaneously or the metal ingredient that successively produces water-supply pipe sneak in the water, the firecoat based on rust is adhered in the water-supply pipe the inside, microorganic adhesion is multiplied all reasons that cause water quality deterioration such as reproduction on this firecoat.
For the rubescent problem of above-mentioned water colour, the past after deliberation and taked all countermeasures.For example, adopt to reduce the film degassing method or the vacuum outgas method of water oxygen concentration, form film in the water-supply pipe the inside and obtain medicaments such as the calcium injection method of corrosion protection result or rust-preventive agent injection method and sneak into method with calcium cpd or rust-preventive agent, and additive method such as magnetization method.These methods always all have problem, and it is perfect not having a kind of, degassing method for example, and the deposited lining cost that carries out for the degassing is very high, and medicament is sneaked into rule and just wanted medication every the several months, and is very expensive, and medicament also can polluted water.
Therefore, the method for repairing and mending that applies with resin inside water-supply pipe as very unwise move although cost is not low, uses the most universal.But even if added lining in the water-supply pipe, it is naked that the water-supply pipe connection section still is difficult to avoid metal to reveal, and the long meeting of lining time one in the water-supply pipe produces pin hole or be full of cracks.Consequently, even if added lining in water-supply pipe, owing to be difficult to avoid metal to reveal naked part, get rusty so can reveal naked part at this, being got rusty by the part enlarges gradually, causes the rubescent problem of water colour.This situation often takes place.
In addition, as the anti-corrosion method of water-supply pipe, the past has the people to propose the electric anticorrosion method.As is generally known the reason of why getting rusty in the water-supply pipe is because in the part of water-supply pipe, galvanic action can take place in the potential difference of uneven intermetallic generation when contacting in water (ionogen) in water-supply pipe the inside and the water pipe.In other words, electric current from the metal flow of water-supply pipe the inside to water (ionogen), metal ionization, soluble in water, generate iron rust.This phenomenon takes place respectively in some parts, water-supply pipe the inside, and whole water pipe is got rusty, and produces corrosion.So the electric anticorrosion method adds certain voltage, allow electric current (being called the corrosion protection electric current) flow to the metal of water-supply pipe the inside conversely from water (ionogen), stop metal ionization, prevent to get rusty.But in fact water-supply pipe is the very big equipment of a kind of scope, from the relevant knowledge of the electric anticorrosion method always understood, the useful range of electric anticorrosion method is narrower, if all load onto on the very big water equipment of actual range, then cost is very high, therefore is not put to practicality now.
The present invention develops in view of the situation before above-mentioned, and its problem provides a kind of installation cost, the coating cost is low, installs easily, manages electric corrosion-proof method and device that simple metal is provided with thing.That is to say, a kind of huge stringing engineering that do not need is provided, the metal that can keep optimum voltage at any time is provided with the cathodic protection method and apparatus of thing, and and then the useful range that is not put to practical electric anticorrosion method before a kind of can the expansion is provided, thereby carry out the corrosion protection of water-supply pipe economically, can improve the electric corrosion-proof method and the device of water quality simultaneously.
The inventor etc. are in order to solve above-mentioned problem, and at first the metal structure that buildings roof etc. is exposed in the atmosphere has carried out following test and research, has finally finished the present invention.
(i) measuring apparatus shown in Figure 1 has been adopted in test.
Solar radiation quantity be 100 milliwatts/centimetre 2Situation under, be that 7.5 volts, working current are that 14.5 milliamperes solar cell 1 usefulness insulating adhesive 9 sticks on the painted steel sheet 2 with operating voltage.40 millimeters square aluminum anode 3 usefulness insulating adhesives 9 are sticked on a end near the steel plate of battery, the anode line 1a of solar cell 1 is connected with anode 3.The cathode rays 1b of solar cell 1 is connected with the fertile material of painted steel sheet 2.
To opposite the filming of end 2a of anode position be installed with painted steel sheet 2 and peel off, the formation diameter is 3 centimetres an artificial defect portion 4.In defective part 4 silver/silver chloride microelectrode with the agar coating that contains saturated Repone K (φ=0.1 millimeter) 5 is set.By memory buffer the current potential of 2 pairs of these electrodes 5 of steel plate is outputed to computer, carry out data gathering.
This device was exposed under sunshine, and the surface of painted steel sheet 2 is drenched after-current by water and is circulated by moisture film, and corrosion protection current direction defective part 4 is confirmed can prevent to get rusty by the current potential of defective part 4.
Add under the state of 7.5 volts of voltages for anode 3 at solar cell 1, measurement is positioned at the current potential from about about the 2 meters artificial defect portion 4 of anode 3, its scope is between-800 millivolts to-900 millivolts, as when being carbon steel, because at-650 millivolts, just entered nonactive scope, so confirm to reach abundant corrosion protection.
The testing apparatus of (ii) above-mentioned (i) is after the sun sets, and the current potential of artificial defect portion 4 is not reduced to the corrosion protection scope.Therefore, constitute the circuit that to form store battery shown in Figure 2 below, test.
With 6 series connection of 5 1.2 volts nickel-cadmium cells, use as 6 volts store batteries.Among the figure, 7 is the painted surface of painted steel sheet 2, and 8 is the moisture film that forms on the painted surface 7.
Show that with its result who carries out exposure test on the 60th when raining and night, the current potential of artificial defect portion 4 is-760 millivolts to-880 millivolts, reaches the corrosion protection requirement.At this moment the power consumption of store battery 6 is few, can infer that consuming electric power is about the 20-40 microampere.
(iii) in order to realize comprising store battery, solar cell, aluminum anode is at interior whole equipment miniaturization, and the life-span is at least the target about 10 years, particularly make the charging and discharging of accumulator cycle reach for 4000 cycles, must have depth of discharge is controlled at below 30%, and can prevent overcharged controlled function.
For this point, the system of the Fig. 3 shown in the embodiment below having set up finally after having passed through the test of many times failure has finished technological development.
The inventor etc. solve above-mentioned problem for the water-supply pipe that metal is provided with in the thing, and repetition test has been carried out primary study to following items in earnest, has finally obtained to solve the way of this problem.
(a) voltage is improved, cause corrosion protection excessively to exceed with unlikely, the arrival distance of corrosion protection electric current will be grown.
(b) micro-calcium in the water or magnesium are separated out because of the corrosion protection electric current, separate out in the metallic surface of water-supply pipe to form the electrolysis tectum, and this electrolysis tectum is fine and close lime carbonate, magnesium hydroxide thin layer, is insulating.Consider this point, should find out method, after corrosion protection begins, form the electrolysis tectum as early as possible, until trying one's best away from the anodic position.
These projects are carried out the result of primary study, and having understood fully if can be with the current control of the output of the water in water-supply pipe in certain value, and voltage just can rise automatically with the tectal growth of electrolysis of water-supply pipe the inside, and the corrosion protection scope just can reach farther place.Understood fully also that simultaneously there is an optimum value in the current value that this is certain according to conditions such as the form of the water-supply line that is suitable for and water quality, so must have the function of set with constant current controlling valu easily.Understood fully again in addition,, therefore can make a large amount of the minimizing or extinction of common bacteria in the water supply owing to have the corrosion protection electric current to pass through in the water supply in the water pipe.
The present invention finds according to these, makes to have constantly held the view that water-supply pipe can not carry out economic electric anticorrosion and become history, and economical electric anticorrosion method for disinfection and device are become a reality.
Therefore, in order to solve above-mentioned problem, the feature that the described metal of claim 1 of the present invention is provided with the anti-corrosion method of thing is, near a side of thing is set at metal anode is set, negative electrode is set being provided with on owner's body with a certain distance from the locational above-mentioned metal of this anode, the side that thing is set at above-mentioned metal has water to exist, when having caused above-mentioned metal that the etching condition of thing is set, between above-mentioned anode and negative electrode, there is electric current to pass through, prevents that above-mentioned metal is provided with thing and is corroded.
The described metal of claim 2 of the present invention is provided with the anti-corrosion method of thing, the anti-corrosion method of thing is set as the described metal of above-mentioned claim 1, it is characterized in that it is that the metal that is exposed in the atmosphere is provided with thing that above-mentioned metal is provided with thing, above-mentioned anode is installed on the painted surface that this metal is provided with thing, above-mentioned negative electrode is connected with the main body that above-mentioned metal is provided with thing simultaneously, by this anode is connected with solar cell with negative electrode, the painted surface that thing is set at above-mentioned metal produces defective, simultaneously on this painted surface, form moisture film, when having caused above-mentioned metal that the etching condition of thing is set, between above-mentioned anode and negative electrode, flow through electric current automatically, prevent that above-mentioned metal is provided with thing and is corroded.
The described metal of claim 3 of the present invention is provided with the anti-corrosion method of thing, as the described metal of above-mentioned claim 2 anti-corrosion method of thing is set, and it is characterized in that compensating with long-life rechargeable cell the unstable of above-mentioned solar cell output.
The described metal of claim 4 of the present invention is provided with the anti-corrosion method of thing, as above-mentioned claim 2 or 3 described metals the anti-corrosion method of thing is set, and it is characterized in that above-mentioned electric current is added under constant voltage.
The anti-corrosion method that the described metal of claim 5 of the present invention is provided with thing is, the anti-corrosion method of thing is set as the described metal of above-mentioned claim 1, it is characterized in that it is metal system water-supply pipe that above-mentioned metal is provided with thing, above-mentioned anode is located in the above-mentioned metal system water-supply pipe, expose in water, above-mentioned negative electrode is set leaving this anodic water-supply pipe outside, supply with in the water in long-time in the water service pipe fixed constant current.
The described metal of claim 6 of the present invention is provided with the anti-corrosion method of thing, as the described metal of above-mentioned claim 5 anti-corrosion method of thing is set, the constant current that it is characterized in that afore mentioned rules increases voltage in the tectal growth ratio of the long-time electrolysis that forms in above-mentioned water-supply pipe the inside to be realized.
The described metal of claim 7 of the present invention is provided with the anti-corrosion method of thing, the anti-corrosion method of thing is set as above-mentioned claim 5 or 6 described metals, it is characterized in that when supplying with above-mentioned constant current, the magnesium hydroxide and the calcium carbonate aqueous solution of concentration that interpolation in the water in above-mentioned water-supply pipe is decided, promote the long-time tectal growth of electrolysis that forms in above-mentioned water-supply pipe the inside, enlarge this tectal corrosion protection scope.
The feature that the described metal of claim 8 of the present invention is provided with the corrosion protective device of thing is to have the metal of being contained at least lateral anode of thing is set, with above-mentioned metal the negative electrode that the main body of thing is connected is set, and the current supply arrangement that this anode and negative electrode is connected in the output terminal of self.
The described metal of claim 9 of the present invention is provided with the corrosion protective device of thing, the corrosion protective device of thing is set as the described metal of above-mentioned claim 8, it is characterized in that it is that the metal that is exposed in the atmosphere is provided with thing that above-mentioned metal is provided with thing, above-mentioned anode is contained in this metal and is provided with on the painted surface of thing, above-mentioned negative electrode is connected with the main body that above-mentioned metal is provided with thing, above-mentioned current supply arrangement is for being connected in above-mentioned anode and negative electrode in the solar cell of self output terminal, the painted surface that thing is set at above-mentioned metal produces defective, simultaneously on this painted surface, form moisture film, when having caused above-mentioned metal that the etching condition of thing is set, between above-mentioned anode and negative electrode, flow through electric current automatically, prevent that above-mentioned metal is provided with thing and is corroded.
The described metal of claim 10 of the present invention is provided with the corrosion protective device of thing, the corrosion protective device of thing is set as the described metal of above-mentioned claim 9, it is characterized in that as above-mentioned current supply source, except that solar cell, compensate the unstable of this solar cell output in addition, simultaneously the long lifetime rechargeable cell that when the electric current residue of solar cell, can carry out electric power storage.
The described metal of claim 11 of the present invention is provided with the corrosion protective device of thing, as above-mentioned claim 9 or 10 described metals the corrosion protective device of thing is set, and it is characterized in that above-mentioned electric current is added under constant voltage.
The described metal of claim 12 of the present invention is provided with the corrosion protective device of thing, the corrosion protective device of thing is set as the described metal of above-mentioned claim 8, it is characterized in that it is the metal structure that is exposed in the atmosphere that above-mentioned metal is provided with thing, above-mentioned anode has the recess of opening above being, central part forms the plate shape anode that above-mentioned recess is become circular hole with the bottom surface opening simultaneously, above-mentioned current supply arrangement is that anode is connected with above-mentioned recess, and being contained in the interior solar cell of this recess, above-mentioned negative electrode is for outwards to be installed in the above-mentioned circular hole highlightedly with installation parts, the needle-shaped cathode that is connected with the negative electrode of above-mentioned solar cell simultaneously.
The described metal of claim 13 of the present invention is provided with the corrosion protective device of thing, the corrosion protective device of thing is set as the described metal of above-mentioned claim 12, it is characterized in that current supply source as a supplement, except that solar cell, in above-mentioned recess, also be equipped with and compensating the instable of this solar cell output, simultaneously the long life accumulator that when the electric energy residue of solar cell, can carry out electric power storage.
The corrosion protective device that the described metal of claim 14 of the present invention is provided with thing is, as above-mentioned claim 12 or 13 described metals the corrosion protective device of thing is set, and it is characterized in that forming in above-mentioned plate shape anodic bottom surface the insulation knitting layer that the fixing metal structure is used.
The described metal of claim 15 of the present invention is provided with the corrosion protective device of thing, the corrosion protective device of thing is set as the described metal of above-mentioned claim 8, it is characterized in that it is water-supply pipe that above-mentioned metal is provided with thing, above-mentioned anode is contained in the shank of above-mentioned water-supply pipe, be exposed to space in the pipe, above-mentioned negative electrode is connected in the required outside surface of above-mentioned water-supply pipe, and above-mentioned current supply arrangement is to be connected, to give the constant current feedway of supplying with certain electric current between this anode and negative electrode with above-mentioned negative electrode with above-mentioned anode.
The described metal of claim 16 of the present invention is provided with the corrosion protective device of thing, as the described metal of above-mentioned claim 15 corrosion protective device of thing is set, it is characterized in that above-mentioned current supply arrangement has increases voltage in the tectal growth ratio of the long-time electrolysis that forms in above-mentioned water-supply pipe the inside constant current output characteristic.
The described metal of claim 17 of the present invention is provided with the corrosion protective device of thing, the corrosion protective device of thing is set as above-mentioned claim 15 or 16 described metals, it is characterized in that also having the annular support that inserts above-mentioned water supply pipe joint, clamping, above-mentioned anode is contained in the central space of above-mentioned annular support, a part is exposed outside, and the internal diameter of above-mentioned annular support is set at the internal diameter less than above-mentioned water-supply pipe.
The described metal of claim 18 of the present invention is provided with the corrosion protective device of thing, the corrosion protective device of thing is set as the described metal of above-mentioned claim 17, it is characterized in that above-mentioned annular support does thicklyer, on its heavy wall, form spatial accommodation, in this spatial accommodation, holding above-mentioned current supply arrangement, outside that simultaneously should the annular support is connected with above-mentioned negative electrode, makes whole device in aggregates like this.
Below, embodiments of the present invention are described, but the present invention is not limited to these embodiments.
Embodiment 1
Fig. 3 is one of the present invention and is suitable for being provided with under the situation that thing is a metal structure at metal, realizes the wiring diagram of the device of this metal structure simple type cathodic protection method.
In the method, defectiveness portion 4 on being applied to by the coating 7 on the corrosion protection body painted steel sheet 2, on above-mentioned painted surface with insulating adhesive 9 bonding aluminum anode 3.When humidity is 60% left and right sides, on painted steel sheet 2, cover with moisture film 8, in water, dissolved topsoil material or sea salt particle, form electrolytic aqueous solution, be formed in the condition that defective part 4 is got rusty.With solar cell 1 and subsystem thereof, by moisture film its defective part 4 is supplied with the corrosion protection electric currents, prevent that defective part 4 from getting rusty.On daytime, the electric current that solar cell 1 is supplied with is in accumulators 6 chargings, and above-mentioned electric current is supplied with defective part 4 from anode 3 by moisture film 8.When store battery 6 reached the state that dashes full electricity, overcharged in order to prevent, operational amplifier 11 detected the voltage of store battery 6, then transistor 10 work, and short circuit makes residual current be shorted to the negative electrode of solar cell 1.
Even if the voltage change of store battery 6, Zener diode 12 also can make the voltage before and after it keep constant, the detection of operational amplifier 11 is helped out.To evening, the electric current of solar cell 1 output is 0 o'clock, and the electric current that store battery 6 is emitted is stoped by diode 13, can not be back to solar cell 1, but flow to defective part 4 from anode 3 by moisture film 8.In Fig. 3,14a, 14b, 15,16,17,18 and 19 are system stability resistance.
As whole device, solar cell, Controlling System, store battery and anode are assembled together thick and fast, become one, and can stick on by on the painted surface of corrosion protection body with the softish double faced adhesive tape in order to gather shaping, do not need wiring.It can have various patterns, wherein an example that shown in Figure 4 is.
In Fig. 4 and Fig. 5,20 is plate shape aluminum anode, and setting-in the Controlling System substrate 23 that comprises solar cell 22 and store battery in the opening recess 21 in the above.Be formed on the circular hole 24 of bottom surface opening at the central part of above-mentioned plate shape anode 20.
The firm needle-shaped cathode 26 that is connected with the cathode rays 25 of the Controlling System of substrate 23 is welded on the spring 27, above-mentioned spring 27 usefulness resins are fixed, by above-mentioned circular hole 24 allow the tip of needle-shaped cathode 26 protrude in to adhere to anode 20 bottom surfaces insulation double faced adhesive tape 28 below.
As mentioned above; insulation double faced adhesive tape 28 is being pasted in the bottom surface of anode 20; paste painted steel sheet etc. by the coating of corrosion protection body on the time; as long as above-mentioned double faced adhesive tape 28 following protective membranes are torn off with hand; anode 20, solar cell 22 are got final product with 23 1 signatures of Controlling System substrate, can carry out the corrosion protection of outdoor member easily.
When this device was pressed onto on the painted surface, the tip of needle-shaped cathode 26 was run through coating and is contacted by the fertile material of corrosion protection body, energising.
This device is pasted test steel plate shown in Figure 1, and (its coating is: priming paint polyurethane resin coating, last coating is with heat embrittlement type water soluble propene cold coating) on carried out the results verification of corrosion protection test, no matter round the clock, all the year round, surpass 60% in humidity, form the environment of moisture film, when being corrosive environment, can make the current potential of steel plate artificial defect portion keep the corrosion protection current potential.The sign that gets rusty is not seen by artificial defect portion.In said structure, the position is set should selects cryogenic place as much as possible of store battery according to environment for use.For example, can in the space of rear surface of solar cell, store battery be set.In addition, the The whole control system that will comprise solar cell is made large-scale plant, is arranged at easy sunkissed place, draws anode line from device, be connected with each anode that includes current limiting device, the system that supplies with the corrosion protection electric current to a plurality of anodes also can be put to practicality with device.
Embodiment 2
Fig. 6 is that metal is provided with under the situation that thing is a water-supply pipe in the present invention, and the summary of the electric anticorrosion method for disinfection of this water-supply pipe constitutes explanatory view.In the anti-corrosion method of this water-supply pipe, adopted constant current feedway 32 with supply terminals 31.Anode 33 is contained in the front end of the constant current output line of this constant current feedway 32, and this anode 33 is installed on the inside 35a of water-supply pipe 35, and negative electrode 34 is installed in the outside 35b that is contained in water-supply pipe 35 simultaneously, and negative electrode 34 is connected with the input line of constant current feedway 32.The circuit of Zu Chenging like this, when above-mentioned constant current feedway 32 switched on, the constant low current, passed through in the water in water-supply pipe 35 to above-mentioned negative electrode 34 from above-mentioned anode 33.The direction of this electric current (corrosion protection electric current), to spontaneous corrosion current in the common water-supply pipe, promptly cause because of the potential difference of the water (ionogen) in the metal (iron) of water-supply pipe the inside and the water pipe, from metal flow to the electric current that supplies water, be in the other direction, this common opposite direction electric current can stop the ionization of metal, prevents corrosion.
Above-mentioned constant current feedway 32 has the mechanism of current control at certain value, and this constant current is set in the mechanism of optimum amounts of current, possesses circuit shown in Figure 7.This circuit is for being the constant current power supply device of attraction current mode the water between above-mentioned anode 33 and the negative electrode 34 at any time from load.The principle of this circuit is that the drain current Io according to field-effect transistor (electrolysis effectiveness transistor) 42 equates fully with source electric current I s, and TR answers transistor 43 only to make electric current to amplify and use.Twist switch 44 is switched to standard resistance 45, can specify output constant current Io by following formula.
(formula 1)
Io＝Vi/Ri(i＝1，2，3，4，5)
In Fig. 7, anode 33 forms annular, is contained in the interior week of the resin system annular support (but double as pad) 36 that inserts water-supply pipe 35 connection portions, exposes in water.The internal diameter of this circular anode 33 is less than the internal diameter of water-supply pipe 35.Like this, the current by this anode 33 become turbulent flow.Because produced turbulent flow here, so from here or when in water, adding magnesium hydroxide or lime carbonate near it, can impel it to sneak in the water in order to promote the tectal growth of electrolysis of water-supply pipe the inside.
Fig. 8 is the structure iron of partial cross section of electric anticorrosion sterilizing unit blocking one example of expression present embodiment.Each integral part of this device all is assembled in the heavy-walled annular support 36.These support 36 usefulness composite ganoine synthetic resins are made, and can inject or screw in the profile that is contained in the corrosion protection object water-supply pipe thereby have.Adorning anode 33 in the inside of this support 36, its part is exposed in water.Thick wall part at this support 36 forms spatial accommodation 36a, has held intensive above-mentioned constant current feedway 32 in this spatial accommodation 36a, and its power connector end 31 is exposed to the periphery of this support 36.Negative electrode 34 is connected with near the of screw 36b of this support 36.Above-mentioned anode 33 is exposed to the water flow section periphery with plate shape, but also can bar shaped be exposed in the water.The titanium of the most handy cladding platinum of its material or multiple niobium with platinum.
The test example
Water-supply pipe 35 to the 25A of Japanese Industrial Standards (JIS) carries out following several test.
(i) the coating steel pipe, (ii) white (zinc-plated) steel pipe (newly), (iii) used the galvanized steel pipe in 15 years, inner rust is warty and swells.
Subjects is selected long 5 meters, 10 meters, 15 meters steel pipe, to the coating steel pipe also select long 20 meters with 30 meters steel pipe.
From 5 meters of the outlet valves of working shaft, used the steel pipe that gets rusty in 15 years in the same old way, load onto the device of above-mentioned Fig. 8 at its front end, the device front connects test and tests with steel pipe.
Working shaft diurnally running (service discharge about 2,000-2,500 liters/hour), though night, off-day, working shaft quit work, water still in pipe, the device energising, the corrosion protection electric current continuously passes through.
(I) coating steel pipe
The coating lining of measured place is peeled off 5 millimeters φ, observe the situation of getting rusty of this part, measure the current potential at this position simultaneously.
Within a short period of time, with-750～-900 millivolts/silver/silver chloride contrast, the defective part (anode voltage is the 10-20 volt) from the about 30 meters positions of anode also can reach the corrosion protection current potential fully, does not find to get rusty.
(ii) galvanized steel pipe (newly)
At first the corrosion protection field can only reach several meters scope, but tests add magnesium hydroxide or calcium carbonate aqueous solution in water after again, forms the electrolysis tectum in the some months in the 13-15 mitron, and the corrosion protection scope can reach near 15 meters.
(iii) galvanized steel pipe (using 15 years)
With spending 15 years, stripping red rust in managing, it is bright pink turbid to circulate, so will change recirculated water continually.The corrosion protection field is described more farther than (ii), and early reaches, and the electrolysis that forms covers (by contained trace magnesium ION Mg in supplying water naturally ++, calcium ion Ca ++) also early.Reached 10-15 rice in 12-18 month.
Changing in the water examination process of carrying out, found common bacteria in the water sample before the device energising for measuring the ferrous components stripping quantity.Particularly situation (iii) is more, but device energising after one month the common bacteria in the water sample reduce to 18/1 part from originally 3,000/1 part.
Through repetition test, according to the length of voltage that is applied to anode 33 and water-supply pipe, found out and killed the scope of common bacteria and the correlationship of condition fully, set up high-rise building water supply disinfection system shown in Figure 9.
Among the figure, connect the water of being sent here by water-supply sources such as running water pipes down at water receiving layer 51, pump 52 sucts elevated tank 53 with water, gives the system of each water terminal water supplying from elevated tank 53, in the position from A to S anode is set.
In other words, by adorning 1 anode at the water outlet of the pump 52 adjacent with water receiving layer 51,1 anode is respectively adorned in inlet, outlet at elevated tank 53, respectively adorn 1 anode at arm (length 5-40 rice) up to the water terminal, use antirust native system in the water-supply pipe, established the technology that to kill the common bacteria of parasitized breeding in the waterworks simultaneously.
Embodiment 3
Further reduction engineering cost is developed, adopted to structure water-supply pipe corrosion protective device as shown in figure 10 without the flange-type anode of Fig. 7,8 shown devices,, simultaneously anode that also can install easily in narrow place, that have the screw-in mounting structure.
Among the figure, 61 are that screw-in installs tool, and 62 be iron outer tube, and 63 be plastic interior pipe the such as high-strength polyethylene.64 is anode, is made of the niobium or the titanium silk that apply platinum.This anode 64 is embedded in above-mentioned interpolation pipe 63.The water-supply pipe bore of the internal diameter of interpolation pipe 63 and mounting object is complementary.Periphery cover upper exterior tube 62 at interpolation pipe 63.The periphery two ends of this outer tube 62 form outside nut, can fix above-mentioned screw-in easily with this outside nut tool 61 is installed.
The open end of above-mentioned anode 64 is connected with brazen inside screw terminal 65, and the positive outside wire of power supply connects therewith.Bolt 66 screws in iron outer tube 62, and the negative outside wire of power supply is connected with this bolt 66.Convert AC power to 15 volts direct current with rectifier, as power supply.Electric current by constant flow system shown in Figure 7, flows to above-mentioned positive pole, negative outside wire from this power supply.Like this, just formed this device.
When using, in the periphery of interpolation pipe 63, load onto rectifier and constant flow system, realize the integrated of intensive anode and Controlling System.In this case, power supply can or be used store battery with 100 volts alternating-current.
When metal is provided with thing and is the metal structure that is exposed in the atmosphere, the present invention can guarantee the corrosion protection of metal structure with thin, little, intensive, the lightweight plate shape corrosion protective device of solar cell, anode, the integrated formation of Controlling System is sticked on the metal structure that is exposed in the atmosphere every 4-8 rice.By popularizing of this device, can reduce huge japanning engineering cost significantly, its economic benefit is inestimable.And it is different with electric anticorrosion always, does not need to carry out time-consuming engineerings such as backguy, does not also need to use external power source, and tangible progress is not only arranged economically, sees that from security standpoint meaning is also very big.It is all different with always method that antianode adds certain only voltage.
In the side area that does not have power units such as electric wire iron tower, adopt this device just can begin to carry out the corrosion protection of convenience, economy.
In the present invention, when metal is provided with thing and is water-supply pipe, different for water pipes such as water-supply pipe, heat supply water pipes with always general knowledge, established as then can be in the scope of anode one side 10-15 rice, as for being coated with tubine then can carry out electric anticorrosion in the scope of 30 meters of anode one sides technology for naked pipe.So just, can be economical, prevent that water-supply pipe from red water problems taking place enduringly.
Simultaneously, the present invention also has one second effect, and promptly with medicament just can not killed common bacteria parasitic in the waterworks.Apartment system particularly shown in Figure 8 does not have common bacteria in the water that can allow water tap emit fully.
In addition, in water-supply pipe, supply with electric current and treated water by this device,, the seepage force of dirty, the mucus that is attached to water-supply pipe the inside, firecoat dirt settling etc. is strengthened with common water ratio, therefore, the ability that above-mentioned dirt settling is washed is improved.This may be that the molecular grouping of water has diminished because have the faint electric current to pass through in the water in the water-supply pipe, and the water that molecular grouping has diminished just infiltrates in the above-mentioned dirt settling easily.
Above-mentioned sterilization effect that device of the present invention is obtained and seepage force reinforced effects, the localized metallic water pipe front end around anode is connecting under the situation of nonmetal water pipes such as pitch tube, also can relate to the pipeline in this nonmetal water pipe and its downstream.
Fig. 1 illustrates in the present invention, the oblique drawing of this metal structure electric anticorrosion device basic structure when metal is provided with thing and is the metal structure that is exposed in the atmosphere.
Fig. 2 is included in the corrosion protective device of Fig. 1 the explanatory view with the corrosion protective device wiring diagram after loading onto store battery and improveing.
Fig. 3 illustrates in the present invention, when metal is provided with thing and is the metal structure that is exposed in the atmosphere, and the wiring diagram of this metal structure electric anticorrosion device one example.
Fig. 4 is when in the present invention metal being provided with thing and being the metal structure that is exposed in the atmosphere, and this metal structure electric anticorrosion device carries out intensive orthographic plan when integrated.
Fig. 5 is the sectional view along the V-V line of Fig. 4.
Fig. 6 represents in the present invention, when metal is provided with thing and is water-supply pipe, and the explanatory view that this water-supply pipe electric anticorrosion method for disinfection summary constitutes.
Fig. 7 represents in the present invention, when metal is provided with thing and is water-supply pipe, is used for the wiring diagram of constant current feedway one example of this water-supply pipe.
Fig. 8 represents in the present invention, when metal is provided with thing and is water-supply pipe, and the explanatory view electric anticorrosion sterilizing unit schematic configuration of this water-supply pipe, when partial cross section is watched.
Fig. 9 is in the present invention, when metal is provided with thing and is water-supply pipe, and the structure iron of the corrosion protection disinfection system of the residential building waterworks that constitutes by the electric anticorrosion device of this water-supply pipe.
Figure 10 is in the present invention, when metal is provided with thing and is water-supply pipe, makes the side elevational view another kind of structure, when partial cross section is watched of this water-supply pipe electric anticorrosion sterilizing unit densification.

Claims (18)

1. a metal is provided with the electric corrosion-proof method of thing, it is characterized in that near metal is provided with a side of thing, anode being set, negative electrode is set being provided with on owner's body with a certain distance from the locational above-mentioned metal of this anode, the side that thing is set at above-mentioned metal has water to exist, when having caused above-mentioned metal that the etching condition of thing is set, between above-mentioned anode and negative electrode, there is electric current to pass through, prevents that above-mentioned metal is provided with thing and is corroded.
2. metal as claimed in claim 1 is provided with the electric corrosion-proof method of thing, it is characterized in that it is that the metal that is exposed in the atmosphere is provided with thing that above-mentioned metal is provided with thing, above-mentioned anode is installed on the painted surface that this metal is provided with thing, above-mentioned negative electrode is connected with the main body that above-mentioned metal is provided with thing simultaneously, by these anodes are connected with solar cell with negative electrode, the painted surface that thing is set at above-mentioned metal produces defective, simultaneously on this painted surface, form moisture film, when having caused above-mentioned metal that the etching condition of thing is set, between above-mentioned anode and negative electrode, flow through electric current automatically, prevent that above-mentioned metal is provided with thing and is corroded.
3. metal as claimed in claim 2 is provided with the electric corrosion-proof method of thing, it is characterized in that compensating with long-life rechargeable cell the unstable of above-mentioned solar cell output.
As above-mentioned claim 2 or 3 described metals the electric corrosion-proof method of thing is set, it is characterized in that above-mentioned electric current applies under certain voltage.
5. the electric corrosion-proof method of thing is set as the described metal of above-mentioned claim 1, it is characterized in that it is metal system water-supply pipe that above-mentioned metal is provided with thing, above-mentioned anode is located in the above-mentioned metal system water-supply pipe, be exposed in the water, outside leaving this anodic water-supply pipe, above-mentioned negative electrode is set, supplies with certain electric current of regulation in the water in long-time in the water service pipe.
As the described metal of above-mentioned claim 5 electric corrosion-proof method of thing is set, the certain electric current that it is characterized in that afore mentioned rules and above-mentioned water-supply pipe inner face are directly proportional through the long-time tectal growth of electrolysis that forms to be increased voltage and realizes.
As above-mentioned claim 5 or 6 described metals the electric corrosion-proof method of thing is set, it is characterized in that when supplying with above-mentioned constant current, add the magnesium hydroxide and the calcium carbonate aqueous solution of normality in the water in above-mentioned water-supply pipe, promote above-mentioned water-supply pipe the inside through the long-time tectal growth of electrolysis that forms, enlarge this tectal corrosion protection scope.
8. a metal is provided with the electric anticorrosion device of thing, it is characterized in that having at least the metal of being contained in lateral anode of thing is set, and with above-mentioned metal the negative electrode that the main body of thing is connected is set, and its output terminal of current supply arrangement connects anode and negative electrode.
9. the electric anticorrosion device of thing is set as the described metal of above-mentioned claim 8, it is characterized in that it is the metal structure that is exposed in the atmosphere that above-mentioned metal is provided with thing, above-mentioned anode is installed on the painted surface of this metal structure, above-mentioned negative electrode is connected with the main body of above-mentioned metal structure, above-mentioned current supply arrangement is the solar cell that output terminal connects above-mentioned anode and negative electrode, painted surface generation defective when above-mentioned metal structure, simultaneously on this painted surface, form moisture film, when having caused the etching condition of above-mentioned metal structure, between above-mentioned anode and negative electrode, flow through electric current automatically, prevent that above-mentioned metal structure is corroded.
10. the electric anticorrosion device of thing is set as the described metal of above-mentioned claim 9, it is characterized in that as above-mentioned current supply source, except that solar cell, compensate the unstable of this solar cell output in addition, simultaneously the long lifetime rechargeable cell that when the electric current residue of solar cell, can carry out electric power storage.
11. the electric anticorrosion device as above-mentioned claim 9 or 10 described metal structures is characterized in that above-mentioned electric current applies under certain voltage.
12. as the described metal of above-mentioned claim 8 is provided with the some corrosion protective device of thing, it is characterized in that it is the metal structure that is exposed in the atmosphere that above-mentioned metal is provided with thing, above-mentioned anode has the recess of opening above being, central part forms the plate shape anode that above-mentioned recess is become circular hole with the bottom surface opening simultaneously, above-mentioned current supply arrangement is for its anode and solar cell in above-mentioned recess is connected, is contained in this recess, and above-mentioned negative electrode is the needle-shaped cathode with elastomeric element outwards is installed in the above-mentioned circular hole highlightedly, the while is connected with the negative electrode of above-mentioned solar cell.
13. as the described metal of above-mentioned claim 12 is provided with the electric anticorrosion device of thing, it is characterized in that as the current supply source, except that solar cell, the unstable of this solar cell output of compensation also is housed, simultaneously the long lifetime rechargeable cell that when the electric energy residue of solar cell, can carry out electric power storage in above-mentioned recess.
14. as above-mentioned claim 12 or 13 described metals are provided with the electric anticorrosion device of thing, it is characterized in that forming in above-mentioned plate shape anodic bottom surface the insulation knitting layer that the fixing metal structure is used.
15. as the described metal of above-mentioned claim 8 is provided with the electric anticorrosion device of thing, it is characterized in that it is water-supply pipe that above-mentioned metal is provided with thing, above-mentioned anode is contained in the shank of above-mentioned water-supply pipe, be exposed to space in the pipe, above-mentioned negative electrode is connected in the required outside surface of above-mentioned water-supply pipe, and above-mentioned current supply arrangement is to be connected, to give the constant current feedway of supplying with certain electric current between this anode and negative electrode with above-mentioned negative electrode with above-mentioned anode.
16. as the described metal of above-mentioned claim 15 is provided with the electric anticorrosion device of thing, it is characterized in that above-mentioned continuous current feedway has to be directly proportional with the long-time tectal growth of electrolysis that forms in above-mentioned water-supply pipe the inside increases the constant current output characteristic of voltage.
17. as above-mentioned claim 15 or 16 described metals are provided with the electric anticorrosion device of thing, it is characterized in that also having the annular support that inserts above-mentioned water supply pipe joint part, clamping, above-mentioned anode is contained in the central space of above-mentioned annular support, a part is exposed outside, and the internal diameter of above-mentioned annular support is set at the internal diameter less than above-mentioned water-supply pipe.
18. as the described metal of above-mentioned claim 17 is provided with the electric anticorrosion device of thing, it is characterized in that above-mentioned annular support does thicklyer, on its heavy wall, form spatial accommodation, in this spatial accommodation, holding above-mentioned current supply arrangement, outside that simultaneously should the annular support is connected with above-mentioned negative electrode, makes whole device in aggregates like this.
CN97120857A 1996-12-27 1997-12-26 Electric corrosion-proof method and device for metal equipment Pending CN1195715A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP34996596 1996-12-27
JP349965/96 1996-12-27
JP054875/97 1997-03-10
JP9054875A JPH10251879A (en) 1997-03-10 1997-03-10 Simple cathodic protection method of metallic structure and device therefor

Publications (1)

Publication Number Publication Date
CN1195715A true CN1195715A (en) 1998-10-14

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Application Number Title Priority Date Filing Date
CN97120857A Pending CN1195715A (en) 1996-12-27 1997-12-26 Electric corrosion-proof method and device for metal equipment

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CN (1) CN1195715A (en)
TW (1) TW370575B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107831882A (en) * 2017-11-24 2018-03-23 英业达科技有限公司 Computer installation
CN108797811A (en) * 2018-06-19 2018-11-13 张丽聪 A kind of corrosion resistant construction steel structure

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100485953B1 (en) * 2002-12-13 2005-05-06 한국전력기술 주식회사 Method for cathodic protection for metal structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107831882A (en) * 2017-11-24 2018-03-23 英业达科技有限公司 Computer installation
CN108797811A (en) * 2018-06-19 2018-11-13 张丽聪 A kind of corrosion resistant construction steel structure

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TW370575B (en) 1999-09-21

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