JP4130491B2 - Method and apparatus for preventing electrolytic corrosion - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electrolytic corrosion prevention method and an apparatus therefor.
[0002]
[Prior art]
As a conventional electrolytic corrosion preventer, one disclosed in Japanese Patent Laid-Open No. 2-159392 has been proposed. This electric corrosion prevention device is for preventing the electric corrosion by the seawater of the engine used in the ocean. A low potential metal body is accommodated in a metal container, and the engine is connected to the metal container via a connecting wire. Are electrically connected. Furthermore, this metal container is interposed in the middle of the suction pipe connected to the suction port of the pump that pumps up engine coolant. Then, the static electricity generated in each part of the engine by the plurality of connection lines is guided to the metal container through the connection lines, and the static electricity is caused to flow from the metal container to the low-potential metal body accommodated therein, so that the low-potential metal body is ionized by the static electricity. Rust caused by static electricity in each part of the engine is removed. Thereafter, the low-potential metal body flows out as zinc ions by the principle of plating by the seawater pumped into the metal container, and a galvanized layer is formed inside the pump and the cooling water tank. Therefore, the pump and the inner surface of the cooling water tank after the rust is removed are kept in a galvanized state, and the electrolytic corrosion is prevented for a long time.
[0003]
[Problems to be solved by the invention]
However, it has been found that the conventional electrolytic corrosion protector has a very serious defect. That is, since static electricity is once flowed from the plurality of locations of the engine to the same metal container via the plurality of connection lines, the possibility that the static electricity flows to the low potential metal body housed inside the metal container is very low. For this reason, the static electricity of each part of the engine flows back and forth on the surface of the metal container and concentrates in the cooling water passage of the engine, for example, and the inner wall surface of the passage may be eroded by excessive static electricity. There was found. More specifically, in the conventional electric corrosion preventer, the distal ends of a plurality of connection wires are respectively connected to a pump, a cooling tank, or a clutch wire, and their base ends are connected to the outer periphery of the metal container of the electric corrosion preventer. Concentrated and connected to one terminal terminal on the surface. For this reason, it is difficult to reliably lead static electricity from a body to be corroded such as a pump, a cooling tank, or a clutch wire to a low potential metal body and to prevent the backflow. Therefore, not only is the effect of removing rust on the body to be electrically corroded, but also, for example, static electricity flowing from the pump through the connection line flows back to the cooling tank side via the terminal terminal, and the inner peripheral surface of the cooling tank is extremely eroded. However, there is a high possibility that the engine will be destroyed.
[0004]
In addition, since the conventional electric corrosion protector has only one kind of low-potential metal body such as zinc contained in the container, there is a problem that the formation of the plating layer and the removal of rust cannot be performed quickly. there were. That is, since the rate at which the low potential metal body is ionized is slow, there is a problem that it takes a considerable number of days until the rust is removed when the rust in the cooling water tank is severe.
[0005]
The first object of the present invention is to solve the above-mentioned problems in the prior art, and to reliably remove the rust by flowing the static electricity of a plurality of objects to be etched to a low potential metal body. It is an object of the present invention to provide an electrolytic corrosion prevention method and apparatus capable of preventing the backflow of static electricity between them, preventing the occurrence of excessive static electricity on the body to be corroded, and reliably preventing the body from being corroded. .
[0006]
In addition to the first object, a second object of the present invention is to provide an electrolytic corrosion preventing method and apparatus capable of quickly removing rust from an electrically corroded body.
In addition to the first object, a third object of the present invention is to provide an electrolytic corrosion preventing method and apparatus capable of appropriately forming a plating film on an object to be etched.
[0007]
[Means for Solving the Problems]
  The invention according to claim 1 is a plurality of electrically corroded bodiesAre connected in parallel to each other.Connecting wireEach terminalThe, Separated from each other,For low-potential metal bodiesConnected and occurred in each said bodyStatic electricity, Individually through the connection lines to the low potential metal bodyIn addition, by consuming the low potential metal body, the eroded body is prevented from being rusted.
[0008]
  According to a second aspect of the present invention, the low-potential metal body is ionized in the first aspect to form an anticorrosive film of the low-potential metal body on the body to be etched.
  The invention according to claim 3 is the first low-potential metal body according to claim 1 or 2, and the first potential metal body.And the metal bodyThan ionization tendencyHighA plurality of electrically corroded bodies using the second low potential metal bodyAre connected to the first and second low-potential metal bodies in a state of being spaced apart from each other, and generated in each of the objects to be electrically etched.Static electricity, Through each connection lineFirst2 lowLead to potential metal bodyTheBy consuming the second low-potential metal body, rust of the body to be corroded is prevented.
[0009]
  The invention according to claim 4 includes a container, and a low-potential metal body housed in an insulated state in the container.With,A plurality of connection lines respectively connected in parallel to a plurality of electrically corroded bodies,Penetrates the container in an insulated stateThe gist is that each terminal of each connection line is connected to the low-potential metal body in a state of being separated from each other.
[0010]
According to a fifth aspect of the present invention, in the fourth aspect, the container is made of an insulating material.
According to a sixth aspect of the present invention, in the fourth or fifth aspect, the container includes a suction port and a discharge port for an electrically conductive liquid, and the discharge port communicates with an object to be etched through a liquid pipe. is there.
[0011]
  A seventh aspect of the present invention provides the method according to any one of the fourth, fifth, and sixth aspects, wherein the low potential metal body includes a first low potential metal body and the first potential metal body.And the metal bodyThan ionization tendencyHighA low-potential metal assembly comprising a second low-potential metal bodyThe terminals of the connection lines are sequentially connected to the first and second low potential metal bodies while being separated from each other.RuThis is the gist.
[0012]
According to an eighth aspect of the present invention, in the sixth aspect, a direct current battery is disposed in the vicinity of the outside of the container, and a pair of lead wires connected to both terminals of the direct current battery are fixed to the container in a penetrating manner. When the liquid is connected to the pair of electrode terminals and supplied into the container, a voltage is applied to the low potential metal body through the liquid.
[0013]
  A ninth aspect of the present invention is the seventh or eighth aspect, wherein the low-potential metal bodies are arranged in a set via a predetermined insulating space or insulating member in the container.
  A tenth aspect of the present invention is the direct current battery according to the eighth or ninth aspect.From the batteryoutputBe doneConstant voltage that keeps the voltage constantSupply deviceIs connected.
[0014]
According to an eleventh aspect of the present invention, in any one of the seventh, eighth, ninth, and tenth aspects, the first low potential metal body is a copper plate, and the second low potential metal body is a zinc block.
[0015]
A twelfth aspect of the present invention is that, in any one of the seventh, eighth, ninth, tenth, and eleventh aspects, the first low potential metal body is formed in a thin cylindrical shape, and the first low potential metal body is thick. It is fitted to the outer peripheral surface of the second low potential metal body formed in the shape of a meat cylinder.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a first embodiment in which the present invention is embodied as an electric corrosion prevention device for a marine engine will be described with reference to FIGS.
[0017]
As shown in FIG. 4, the marine engine 11 is provided with a pump 12 and a cooling tank 13, and an electrolytic corrosion prevention device 15 is interposed in the middle of the suction pipe 14 connected to the pump 12. The cooling seawater sucked from the Kingston 16 is guided to the pump 12 and the cooling tank 13 through the electric corrosion prevention device 15. Reference numeral 17 denotes a rudder.
[0018]
Next, the structure of the electric corrosion prevention device 15 will be described with reference to FIGS.
Connection members 22 and 23 made of an insulating material are provided on both front and rear (left and right in FIG. 1) end surfaces of an insulating container 21 made of an insulating material such as an epoxy resin by means of bolts and nuts. Connected and fixed. The flange portions 22 a and 23 a of the connection members 22 and 23 are fixedly bonded to the upper surface of the pedestal 24. Further, the cylindrical portions 22b and 23b of the connecting members 22 and 23 are connected in the middle of the suction pipe 14 as shown in FIG.
[0019]
  A first low-potential metal assembly 25 and a second low-potential metal assembly 26 are disposed in the insulating container 21 in the front-rear direction. The first low potential metal assembly 25 is made of copper having a thin horizontal cylindrical shape located outside.BoardA first low-potential metal body 27 made of zinc, and zinc fitted into and contacted with the inner peripheral surface of the metal body 27blockAnd a second low-potential metal body 28 having a thick horizontal cylindrical shape. Similarly, the second low-potential metal assembly 26 includes a first low-potential metal body 29 and a second low-potential metal body 30 similar to the first low-potential metal body 27 and the second low-potential metal body 28. . The first and second low potential metal assemblies 25 and 26 are connected in series by a ring-shaped insulating member 31. The insulating member 31 is supported by the insulating container 21 via a bracket 31a made of an insulating material.
[0020]
  When the copper constituting the first low-potential metal bodies 27 and 29 and the iron constituting the engine 11 are dissolved as water, copper constitutes the engine 11 in terms of ionization tendency to become cations. Ionized compared to ironDifficultyIt is a good metal. Further, when the zinc constituting the second low potential metal bodies 28 and 30 and the iron constituting the engine 11 are dissolved in water as a solution, zinc tends to ionize the engine 11 to become a cation. It is a metal that is easier to ionize than the constituent iron.The
[0021]
The container 21 is supported by a pair of electrode terminals T1 and T2 made of, for example, bolts, pins or the like having electrical conductivity such as iron. And the front-end | tip of the 1st and 2nd connection lines 32 and 33 which have insulation coating is each connected to the outer end part of the said electrode terminal T1, T2, and the base end of both connection lines 32 and 33 is the direct current cell 34. Are connected to the positive terminal 35 and the negative terminal 36, respectively. As shown in FIG. 3, the inner ends of the pair of electrode terminals T1 and T2 are insulated from the outer peripheral surfaces of the first and second low potential metal assemblies 25 and 26 with predetermined insulating spaces G and G. .
[0022]
Further, a constant voltage supply device 37 is disposed in the vicinity of the DC battery 34 as shown in FIG. 2, and is connected to the DC battery 34 by a connection line 33 and a connection line 38. Then, the voltage output from the DC battery 34 is held at a low constant voltage so as not to exceed 3.0 V and supplied to the first and second low-potential metal assemblies 25, 26 from both connection lines 32, 33. Is possible. Further, when a lightning surge current enters the constant voltage supply device 37, a function of absorbing it is given. For this reason, static electricity does not have to remain in the electrolytic corrosion prevention device. An example of a member that absorbs this surge is zinc.
[0023]
The thickness of the first low-potential metal bodies 27 and 29 made of copper is set to 0.1 mm to 1.5 mm, for example, and the thickness of the second low-potential metal bodies 28 and 30 is set to 20 mm to 40 mm.
[0024]
Four terminal fittings T3, T4, T5, and T6 are respectively embedded in the first and second low potential metal assemblies 25 and 26 at a predetermined distance. Then, the base ends of the lead wires 39, 40, 41, 42 having an insulation coating different from the connection wires 32, 33 are connected to the four terminal fittings T3, T4, T5, T6, and the lead wires 39˜ The intermediate part of 41 penetrates the wall part of the container 21 through an insulating sealing material, and is led to the outside. As shown in FIG. 4, the lead wires 39 to 41 are connected to the pump 12, the tank 13, the screw holding fitting 43 and It is connected to each of the flanges 17.
[0025]
Next, the operation of the electrolytic corrosion prevention apparatus configured as described above will be described.
Now, immediately after the electrolytic corrosion preventing device 15 is incorporated into the suction pipe 14 and the pump 12 shown in FIG. 4 is stopped, the seawater in the electrolytic corrosion preventing device 15 is kingston of the suction pipe 14. 16 is discharged to the outside. In this state, the first and second low-potential metal assemblies 25 and 26 are electrically insulated from each other via the insulating member 31.
[0026]
In this state, the static electricity of the pump 12, the tank 13, the screw holding fitting 43, and the rod 17 passes through the lead wires 39, 40, 41, 42 and the terminal fittings T3, T4, T5, T6, and the first and second low potential metal assemblies. Rust generated on the surfaces of the pump 25, the tank 13, the screw holding metal fitting 43, the flange 17, etc. is removed by being guided to the bodies 25 and 26, respectively.
[0027]
  When the pump 12 is started after the rust generated in the body to be electrically etched such as the pump 12 and the tank 13 is removed in this way, the seawater is sucked into the suction pipe 14 from the Kingston 16, and therefore, in FIG. The container 21 shown is filled with seawater. At this time, the electrode terminals T1, T2 and the first and second low-potential metal assemblies 25, 26 are electrically connected by seawater entering the insulating spaces G, G by seawater. Thereby, the voltage of the DC battery 34 is applied to the first and second low-potential metal assemblies 25 and 26 from the both connection lines 32 and 33 and the electrode terminals T1 and T2 through the constant voltage supply device 37..
[0028]
  in frontAs described above, when the current of the DC battery 34 flows through the first and second low-potential metal bodies 27, 29, 28, and 30, the metal bodies 27 to 30 become anodes and the engine 11 becomes the cathode. Copper and zinc ions eluted from the anode into the seawater are diffused into the seawater and electrodeposited on the engine 11 as a cathode, and a mixed coating of copper and zinc is formed on the surface of the engine 11.Be.
[0029]
Next, the function and effect of the electrolytic corrosion prevention device configured as described above will be described together with the configuration.
In the first embodiment, the first and second low-potential metal assemblies 25, 26, the pump 12, the tank 13, the screw holding bracket 43, and the rod 17 are connected to the lead wires 39, 40, 41, 42, and The terminals were connected in parallel by terminal fittings T3, T4, T5, and T6 embedded at a predetermined interval. For this reason, the static electricity generated in the electrically corroded body such as the pump 12 is guided to the low potential metal assemblies 25 and 26 without flowing back to each electrically corroded body, Rust generated on the outer surface is surely removed.
[0030]
In the first embodiment, the first and second low-potential metal assemblies 25 and 26 are arranged separately via the insulating member 31, and a constant voltage is applied from the DC battery 34 via the lead wires 32 and 33. It was made to supply, and when seawater was filled in the insulated container 21, an electric current was made to flow between both metal assemblies 25 and 26. Therefore, the first and second low potential metal bodies 27, 29, 28, and 30 are ionized and the plated coating mixed with copper and zinc is rusted and removed on the inner surfaces of the pump 12 and the cooling tank 13. Electrodeposition can enhance the antirust effect on the inner surfaces of the pump 12 and the cooling tank 13 after rust removal.
[0031]
In the first embodiment, the metal assemblies 25 and 26 are constituted by the first low potential metal bodies 27 and 29 made of copper and the second low potential metal bodies 28 and 30 made of zinc. For this reason, when the voltage of the DC battery 34 is first applied, the thickness of the coating is increased by the method of ionizing only zinc and electrodepositing the coating from the beginning. The mixed coating can be made thin, and therefore the flow resistance due to the coating on the inner surfaces of the pump 12 and the cooling tank 13 can be reduced.
[0032]
  In the first embodiment, the DC battery 34 has a constant voltageSupply device37 is connected, for example, a voltage of 3.0 V or more is not applied to both metal assemblies 25 and 26, and therefore, a large amount of mixed ions of copper and zinc are generated from the metal assemblies 25 and 26. Therefore, it is possible to prevent the formation of an excessively thick anticorrosion film.
[0033]
Next, a second embodiment embodying the present invention will be described with reference to FIGS.
In the second embodiment, the end portions of the lead wires 32 and 33 connected to the DC battery 34 are connected to electrode terminals 43 and 44 that are fixed to the outer peripheral surface of the insulating container 21. These electrode terminals 43 and 44 are fastened and fixed to the insulating container 21 by a nut 46 through a seal member 45. Both electrode terminals 43 and 44 are always insulated from the first and second low potential metal assemblies 25 and 26 through predetermined insulating spaces G and G.
[0034]
Further, in this second embodiment, the insulating member 31 of the first embodiment for connecting the first and second low potential metal assemblies 25 and 26 is omitted, and instead the insulating partition wall 211 is formed on the inner peripheral surface of the container 21. Is attached. As shown in FIG. 6, support rods 47 (48) and 49 (50) made of conductive bolts are passed through the insulating container 21, and each support rod is fastened and fixed to the container 21 by a nut 46 via a seal member 45. ing. The first low potential metal assembly 25 is supported by the two support rods 47 and 49 among the four support rods 47 to 50, and the second low potential metal assembly is supported by the remaining two support rods 48 and 50. 26 is supported. Other configurations are the same as those in the first embodiment.
[0035]
Therefore, in the second embodiment, when the engine is stopped, the first and second low potential metal assemblies 25 and 26 are insulated from the electrode terminals 43 and 44, so that seawater is contained in the container 21. Only when it enters, the current of the battery 34 flows through both the low potential metal assemblies 25 and 26. For this reason, the electric current of the battery 34 does not flow to the metal assemblies 25 and 26 or the lead wires 39 to 42 in a state where seawater does not enter the container 21.
[0036]
Next, a third embodiment embodying the present invention will be described with reference to FIGS.
In the third embodiment, the electric corrosion prevention device 15 described in the first embodiment is attached to the automobile 51. As shown in FIG. 8, the cooling passage 52 a of the engine 52 and the radiator 53 are connected by a cooling pipe 54. The electrolytic corrosion preventing device 15 is interposed in the middle of the cooling pipe 54. Lead wires 39, 40, 41, 42 of the electric corrosion prevention device 15 are connected to three locations of a muffler 55 and a vehicle body frame 56. Lead wires 57 and 58 are connected to the inner wall of the cooling passage 52 a of the engine 52 and the inner wall of the radiator 53. The structure of the electric corrosion prevention device 15 is the same as that of the first embodiment, but the lead wires 57 and 58 are connected in parallel to the first and second low potential metal assemblies 25 and 25 via terminal fittings. The connection is different.
[0037]
Therefore, in the third embodiment, first, static electricity flows from the inner wall of the cooling passage 52a and the inner wall of the radiator 53 to the first and second low-potential metal assemblies 25 and 26 by the lead wires 57 and 58, and rust is generated. Removed. In the case of this rust removal, static electricity is effectively removed once the cooling water in the cooling passage 52a and the radiator 53 is discharged.
[0038]
  Thereafter, using the cooling water flowing through the radiator 53, a corrosion-resistant coating made of zinc and copper is formed on the radiator 53 and the inner wall surface of the cooling passage 52 a of the engine 52.AndEven after the output of the battery 34 is stopped, the antirust effect of the cooling water system in the engine 52 and the radiator 53 can be maintained for a long time. Moreover, in this embodiment, the rust preventive agent conventionally mixed with the cooling water of the radiator can be omitted.
[0039]
Further, in the third embodiment, the electric corrosion prevention device 15 is disposed above the cooling pipe 54 so that the cooling water does not enter the electric corrosion prevention device 15 while the engine is stopped. In this case, similarly to the first embodiment, when the engine is operated and the cooling water is circulating, the electrolytic corrosion prevention device 15 is activated and a corrosion-resistant coating is formed.
[0040]
Next, a fourth embodiment embodying the present invention will be described with reference to FIG.
This 4th Embodiment is related with the electrolytic corrosion prevention apparatus for the rust prevention of the iron plate 62 or the iron frame 63 of the ship 61. FIG. The electrolytic corrosion preventing device 15 includes a flat copper first low potential metal body 27 on the upper surface side, and a second low potential metal body 28 placed on the ship bottom in contact with the lower surface of the first low potential metal body 27. And terminal fittings (not shown) embedded in both metal bodies 27 and 28. The terminal fittings embedded in the first and second low-potential metal bodies 27 and 28 are connected in parallel to each part of the iron plate 62 and the iron frame 63 by lead wires 39 to 42.
[0041]
  In the fourth embodiment, static electricity of the iron plate 62 and the iron frame 63 is guided to the first and second low potential metal bodies without using a battery, and rust on the surfaces of the iron plate 62 and the iron frame 63 is removed. Is. Also in this embodiment, since the lead wires 39, 40, 41, and 42 are respectively arranged in parallel, the backflow of static electricity to the iron plate 62 and the iron frame 63, which are subject to electrical corrosion, is prevented and erosion is prevented. be able to. In addition, since the first low potential metal body 27 and the second low potential metal body 28 are used, for example, when used in a ship 61 where a lot of rust is generated,zincNo. made of board2Low-potential metal body 28Eliminates static electricity efficientlywear.
[0042]
Next, a fifth embodiment embodying the present invention will be described with reference to FIGS.
In the fifth embodiment, the present invention is applied to a steel structure 71 for building construction. As shown in FIG. 11, the first and second low-potential metal bodies 27 and 28 are accommodated in an insulating container 21A, and a plurality of holes through which rainwater enters are provided in the insulating container 21A. The first to fourth lead wires 39, 40, 41, and 42 are connected between the steel structure 71, respectively. Each of the lead wires 39, 40, 41, and 42 is provided with a current sensor 72 for detecting that static electricity is flowing, and each current sensor 72 is provided with a current display meter 73 for displaying it. .
[0043]
  Accordingly, in the electrolytic corrosion preventing device 15 of the fifth embodiment, since the lead wires 39, 40, 41, and 42 are arranged in parallel, static electricity flows back to the local part of the steel structure 71 that is the electrically corroded body. It is possible to prevent concentration and prevent erosion. Also in the fifth embodiment, the initial removal of rust generated in the steel structure 71 for the same reason as in the fourth embodiment is performed.2Low-potential metal body 28More efficient lineUrineYou can.
[0044]
Next, a sixth embodiment of the present invention will be described with reference to FIG.
In the sixth embodiment, the ends of the lead wires 39 and 40 of the electrolytic corrosion prevention device 15 are connected from a connection part provided in the middle of the pipe 81, that is, a connection part of the flange fittings 82 and 82, and the flange part 82 of the pipe 81 is connected. The static electricity generated in the lead is guided to the electrolytic corrosion prevention device 15 through both lead wires 39 and 40.
[0045]
  In the sixth embodiment, since the lead wires 39 and 40 are arranged in parallel, it is possible to prevent erosion by preventing static electricity from flowing back and concentrating on the local portion of the pipe 81 which is the body to be electrically corroded. it can. Also, removal of rust generated in the pipe 81 for the same reason as in the fourth embodimentEffectWellDone, longA stable anticorrosive action can be maintained over a period.
[0046]
In addition, this invention is not limited to the said 1st-6th embodiment, It can also be concretely implemented as follows.
In the first to sixth embodiments, the first low potential metal body is made of copper and the second low potential metal body is made of zinc. Instead, for example, the first low potential metal body is made of The second low-potential metal body can be made of a material such as tin, which is less easily ionized than the first low-potential metal body.
[0047]
In each of the embodiments, the first low potential metal bodies 27 and 29 are omitted.
As the material of the connecting wires 32, 33 and the lead wires 39, 40, 41, 42 is made of, for example, copper as the first low potential metal bodies 27, 29, the lead wires themselves are not eroded. An iron-based material is also conceivable. However, the time for which the first low-potential metal bodies 27 and 29 are corroded is not so long by forming the metal bodies thin, and may be a copper thick line.
[0048]
In the first to sixth embodiments, the terminal fittings T3 to T6 are embedded in the second low-potential metal bodies 28, 30, but the terminal fittings, as shown in FIG. It is also possible to connect the core wires of lead wires 39, 40, 41, and 42 that are buried in the central portion of 30 and have an insulating coating in the central portion. In this case, when the distances from the terminal fittings T3 to T6 to the surfaces of the second low potential metal bodies 28, 30 are made equal and the second low potential metal bodies 28, 30 are eroded by the principle of plating, the terminal fittings are used. It is desirable that T3 to T6 be exposed last.
[0049]
The lead wires 39, 40, 41, and 42 and the second low-potential metal body 28 of all the electrolytic corrosion prevention devices 15 described above for the connection configuration of the terminal fittings T3 to T6 and the lead wires 39, 40, 41, and 42 of the above embodiment. , 30 can also be applied to each connection configuration.
[0050]
As shown in FIG. 14, the terminal fittings T3 to T6 are spirally formed and embedded in the second low-potential metal bodies 28 and 30, and lead wires 39, 40, 41, and 42 are connected to intermediate portions thereof. thing.
[0051]
Each connection configuration of the lead wires of all the electrolytic corrosion prevention devices 15 and the second low potential metal bodies 28, 30 described above as the connection configuration of the terminal fittings T3 to T6 and the lead wires 39, 40, 41, 42 of the above embodiment. It can also be applied to.
[0052]
As shown in FIG. 15, the terminal fittings T3 to T6 are omitted, and lead wires 39, 40, 41, and 42 having insulating coatings are embedded in the second low potential metal bodies 28 and 30, and the inner ends of the respective wires Electrically connect the exposed core wire to the metal bodies 28 and 30.
[0053]
The connection configuration of the lead wires 39, 40, 41, and 42 in the above embodiment is changed to each connection configuration of the lead wires 39, 40, 41, and 42 of the electric corrosion prevention device 15 and the second low potential metal bodies 28 and 30 described above. It can also be applied.
[0054]
Technical ideas other than claims 1 to 12 that can be grasped from the embodiment described above will be described below.
9. The electrolytic corrosion preventing device according to claim 4, wherein the body to be corroded is an iron plate of a ship, a steel structure 71 for building construction, or a pipe 81.
[0055]
  7. The electrolytic corrosion preventing device according to claim 6, wherein the container is interposed in a cooling water path of a ship or vehicle engine as an electrically corroded body.
  9. The lead wire according to claim 5, wherein each lead wire is consumed by a sensor that detects static electricity and a low-potential metal body based on the static electricity detected by the sensor.TheAn electric corrosion prevention device comprising an indicator for indicating whether or not the operation has been performed.
[0056]
This electric corrosion prevention device can easily confirm whether or not the low-potential metal body accommodated in the container is consumed, and can replace the low-potential metal body in a timely manner.
[0057]
8. The electrolytic corrosion prevention device according to claim 4, wherein the container has a large number of small holes through which rainwater or groundwater enters.
In this electric corrosion prevention device, the low-potential metal body housed inside is covered with water, so that the static electricity from the lead wire can be surely flowed to the low-potential metal body and consumption of the low-potential metal body can be performed stably. it can.
[0058]
13. The electrolytic corrosion prevention device according to claim 7, wherein the plurality of lead wires are single wires.
This electric corrosion prevention device has an effect that the rust removal by the first and second low potential metal bodies described above can be performed quickly.
[0059]
In this specification, the body to be electrically corroded generates rust such as a window frame made of aluminum, a power transmission tower, etc., in addition to a ship and vehicle engine, various parts, and a steel structure that generate rust by electric corrosion. It also includes various objects.
[0060]
【The invention's effect】
  As described above in detail, the invention of the electrolytic corrosion prevention method according to claim 1 can remove the rust by surely flowing the static electricity of the plurality of electrically etched bodies to the low-potential metal bodies.whileofStatic electricityTherefore, it is possible to prevent the occurrence of excessive static electricity on the object to be corroded, and to surely prevent the object to be corroded.
[0061]
In addition to the effect of the invention according to claim 1, the invention of the method for preventing corrosion according to claim 2 can prevent the occurrence of rust after rust removal by forming a plating film on the object to be etched.
[0062]
  In addition to the effect of the invention of claim 1 or 2, the invention of the method of preventing electrolytic corrosion according to claim 3 can efficiently rust the object to be etched.
  According to a fourth aspect of the present invention, the galvanic corrosion prevention device can remove rust by surely flowing static electricity of a plurality of eroded bodies through low-potential metal bodies.Static electricity betweenTherefore, it is possible to prevent the occurrence of excessive static electricity on the object to be corroded, and to surely prevent the object to be corroded.
[0063]
In addition to the effect of the invention according to claim 4, the container of the electric corrosion prevention device according to claim 5 is made of an insulating material, so that the low-potential metal body and the container can be easily insulated. Can do.
[0064]
In addition to the effect of the invention according to claim 4 or 5, the invention of the electric corrosion prevention device according to claim 6 can be easily incorporated into piping such as a cooling water system of a ship or a vehicle engine.
[0065]
In addition to the effect of the invention according to any one of claims 4, 5, and 6, the invention of the electrolytic corrosion prevention device according to claim 7 can efficiently perform rust removal of the body to be etched. .
[0066]
In addition to the effect of the invention described in claim 8, the invention described in claim 8 can quickly and properly form a plating film on an electrically corroded body such as a cooling water system of a ship or vehicle engine in an initial stage. Can be done.
[0067]
  According to the ninth aspect of the invention, in addition to the effect of the seventh or eighth aspect of the invention, it is possible to stably form a plating film on the object to be etched over a long period of time.
  In addition to the effect of the invention according to claim 8 or 9, the invention according to claim 10 has a constant voltage.Supply deviceAs a result, the voltage with respect to the low potential metal body is suppressed to a constant value, so that the film can be formed properly.
[0068]
The invention according to claim 11 can produce the first and second low-potential metal bodies at low cost in addition to the effect of the invention according to any one of claims 7, 8, 9, and 10. .
[0069]
In addition to the effect of the invention according to any one of the seventh, eighth, ninth, tenth, and eleventh aspects, the first low-potential metal body can be easily changed to the second low-potential metal body. Can be formed.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a central portion of an electrolytic corrosion preventing apparatus showing a first embodiment embodying the present invention.
FIG. 2 is a partially omitted perspective view of the electrolytic corrosion preventing apparatus according to the first embodiment.
FIG. 3 is an explanatory diagram showing a circuit of the electrolytic corrosion preventing apparatus according to the first embodiment.
FIG. 4 is a cross-sectional view in which the electrolytic corrosion preventing apparatus according to the first embodiment is used for a marine engine.
FIG. 5 is a longitudinal sectional view of a central portion of an electrolytic corrosion preventing apparatus according to a second embodiment.
FIG. 6 is a partial cross-sectional view of the electrolytic corrosion preventing apparatus according to the second embodiment.
FIG. 7 is a schematic front view of a third embodiment in which the present invention is applied to an automobile.
FIG. 8 is an enlarged explanatory view of a main part of the third embodiment.
FIG. 9 is a sectional view showing a fourth embodiment in which the present invention is applied to a ship.
FIG. 10 is a perspective view showing a fifth embodiment in which the present invention is applied to a steel structure.
FIG. 11 is a cross-sectional view of a main part of an electrolytic corrosion prevention apparatus according to a fifth embodiment.
FIG. 12 is a front view showing a sixth embodiment in which the present invention is applied to piping.
FIG. 13 is a partial sectional view showing another embodiment of the present invention.
FIG. 14 is a partial sectional view showing another embodiment of the present invention.
FIG. 15 is a partial sectional view showing another embodiment of the present invention.
[Explanation of symbols]
  DESCRIPTION OF SYMBOLS 15 ... Electric corrosion prevention apparatus, 21 ... Container, 25, 26 ... 1st and 2nd low potential metal assembly, 27, 29 ... 1st low potential metal body, 28, 30 ... 2nd low potential metal body 31 ... Insulating member, 32, 33 ... Connection line, 34 ... DC battery, 37 ... Constant voltageSupply device, 39, 40, 41, 42, 56, 57 ... lead wires.

Claims (12)

A plurality of respective terminals of the plurality of connection lines connected in parallel to the electric 蝕体, while spaced apart from one another, connected to a low potential metal body, the static electricity generated to the each object collector 蝕体, each A method for preventing erosion , comprising: individually leading to the low potential metal body through a connecting line and consuming the low potential metal body to prevent rust of the body to be electrically corroded.   2. The method of preventing electrolytic corrosion according to claim 1, wherein the low potential metal body is ionized to form an anticorrosive film of the low potential metal body on the body to be etched. According to claim 1 or 2 and the first low-potential metal bodies, housed inside the first potential metal body, and with a high has a second low-potential metal bodies ionization tendency than the metal body, a plurality of Each terminal of a plurality of connection lines connected in parallel to the body to be eroded is sequentially connected to the first and second low-potential metal bodies in a state of being separated from each other, and is generated in each body to be eroded. static electricity, leading the a second low-potential metal bodies through the respective connection lines, electrical corrosion prevention method characterized by preventing rust of the conductive蝕体by consuming said second lower potential metal bodies. Comprising a container and a low-potential metal body housed in an insulated state in said container, a plurality of connection lines connected in parallel to a plurality of the conductive蝕体, through in an insulated state in the container, 2. The electrolytic corrosion preventing apparatus used in the electrolytic corrosion preventing method according to claim 1 , wherein each terminal of each connection line is connected to the low potential metal body in a state of being separated from each other .   5. The electrolytic corrosion preventing apparatus according to claim 4, wherein the container is made of an insulating material.   6. The electrolytic corrosion prevention device according to claim 4, wherein the container includes an electrically conductive liquid suction port and a discharge port, and the discharge port communicates with an object to be etched through a liquid pipe. 7. The low-potential metal body according to claim 4, wherein the low-potential metal body is accommodated inside the first low-potential metal body and the first potential metal body , and is more ionized than the metal body . low potential metal assemblies der comprising a second low-potential metal bodies have high is, each terminal of each connection line is in a state of being spaced apart from each other, are sequentially connected to the first and second low-potential metal bodies Electric corrosion prevention device.   In claim 6, a DC battery is disposed in the vicinity of the outside of the container, and a pair of lead wires connected to both terminals of the DC battery are connected to a pair of electrode terminals penetratingly fixed to the container, An electrolytic corrosion prevention device configured to apply a voltage to a low potential metal body through a liquid when the liquid is supplied into the container.   9. The electrolytic corrosion prevention device according to claim 7 or 8, wherein the low-potential metal body is disposed as a set in a container via a predetermined insulating space or insulating member. According to claim 8 or 9, wherein the DC battery electric corrosion preventing device constant voltage supply device for holding the voltage output from the battery to a constant voltage is connected to.   11. The electrolytic corrosion prevention device according to claim 7, wherein the first low potential metal body is a copper plate and the second low potential metal body is a zinc block.   12. The first low potential metal body according to any one of claims 7, 8, 9, 10, and 11, wherein the first low potential metal body is formed in a thin cylindrical shape, and the first low potential metal body is formed in a thick cylindrical shape. 2 An electrolytic corrosion prevention device fitted on the outer peripheral surface of the low potential metal body.

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