Rust detection device

Abstract

To provide a rust detection device that can reduce the occurrence of false detections due to corrosion. [Solution] A rust detection device comprising a power supply, a first electrode, and a second electrode disposed at a certain distance from the first electrode, The first electrode comprises a first metal and a second metal which is less corroded than the first metal, on the surface of the first metal and in a region facing the second electrode. The rust detection device is characterized in that the second electrode has the first metal and the second metal on the surface of the first metal and in a region opposite to the first electrode.

Description

Technical Field

[0001] This disclosure relates to a rust detection device.

Background Art

[0002] A rust detection device can be arranged around electric components in a vehicle, for example, to detect the degree of rust generation and notify the user of a sign of malfunction, thereby promoting component replacement.

[0003] For example, Patent Document 1 below discloses an electric resistance type corrosion sensor that measures the corrosion amount of a sensor part based on an increase in the electric resistance value accompanying a decrease in the plate thickness of the sensor part (iron) as one of the corrosion monitoring methods.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the rust detection device described in Patent Document 1 above, the degree of corrosion is determined by directly measuring the electric resistance value in the sensor part. In a high-temperature environment or a severe corrosion environment, it is expected that the amount of decrease in the thickness of the measurement electrode will increase, making it difficult to measure the electric resistance value. Therefore, in the conventional rust detection device, it is difficult to accurately measure the electric resistance value over a long period, and there is a risk of false detection.

Means for Solving the Problems

[0006] A rust detection device according to an embodiment for solving the above problems is a rust detection device having a power source, a first electrode, and a second electrode arranged at a certain distance from the first electrode. The first electrode comprises a first metal and a second metal which is less corroded than the first metal, on the surface of the first metal and in a region facing the second electrode. The second electrode comprises the first metal and the second metal on the surface of the first metal in a region facing the first electrode. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a rust detection device that can reduce the occurrence of false detections due to corrosion. [Brief explanation of the drawing]

[0008] [Figure 1] This is a schematic diagram illustrating an example of the rust growth process in the rust detection device of the present invention. [Modes for carrying out the invention]

[0009] (Rust detection device) The rust detection device of the present invention comprises a power supply, a first electrode, and a second electrode disposed at a certain distance from the first electrode, and may optionally include other means.

[0010] Here, the rust detection device of the present invention will be specifically described with reference to Figure 1. Figure 1 is a schematic diagram showing an example of the rust growth process in the rust detection device of the present invention.

[0011] The rust detection device 100 shown in Figure 1 comprises a power supply 1, a first electrode 21, and a second electrode 22.

[0012] <Power supply> As for power source 1, there are no particular restrictions as long as it is capable of supplying power to the first electrode 21 and the second electrode 22, and any known power source can be appropriately selected.

[0013] <Electrode> The first electrode 21 has a first metal 31 and a second metal 32 on the surface of the first metal 31 and in a region facing the second electrode 22, and may have other members as required.

[0014] The second electrode 22 has a first metal 31 and a second metal 32 on the surface of the first metal 31 and in a region facing the first electrode 21, and may have other members as required.

[0015] In the present invention, any of the electrodes in the electrode group may be used as the first electrode 21 or the second electrode 22. In FIG. 1, for convenience, the electrode on the left side in FIG. 1 is used as the first electrode, and the electrode on the right side in FIG. 1 is used as the second electrode.

[0016] - First metal - There is no particular limitation on the first metal 31, and generally used electrode members can be used. For example, iron (Fe), copper (Cu), etc. can be mentioned.

[0017] - Second metal - The second metal 32 is a metal that is more corrosion-resistant than the first metal 31. There is no particular limitation on the second metal 32 as long as it is a metal that is more corrosion-resistant than the first metal 31, and it can be appropriately selected according to the purpose. For example, gold (Au), etc. can be mentioned.

[0018] There is no particular limitation on the method of disposing the second metal 32 on the surface of the first metal 31, and it can be appropriately selected according to the purpose. For example, a method of winding a metal wire made of the second metal 32 around the first metal 31 can be mentioned.

[0019] Here, the mechanism of the present invention will be specifically described with reference to FIG. 1.

[0020] FIG. 1(a) shows the state before the operation of the rust detection device 100. Specifically, since the first electrode 21 is disposed at a certain distance from the second electrode 22, it is in a non-powered state.

[0021] FIG. 1(b) shows a state where rust 4 has been generated after the operation of the rust detection device 100. Specifically, due to the rust 4 generated in the region between the first metal 31 and the second metal 32 by the operation of the rust detection device 100, each electrode is in a state of expansion.

[0022] FIG. 1(c) shows a state where the electrodes expanded by the rust 4 generated by the operation of the rust detection device 100 are in contact. Specifically, the second metal 32 disposed on the surface of each electrode and in the region facing the other electrode comes into contact due to the expansion of the electrode caused by rust generation, and a current is flowing in the direction of the arrow in FIG. 1(c).

[0023] By detecting the energization generated in this way, the generation of rust can be detected.

[0024] In this specification, the "region facing the first electrode" and the "region facing the second electrode" are regions where the first electrode 21 and the second electrode 22 come into contact when expanded by the rust 4.

[0025] The fixed distance L provided between the first electrode 21 and the second electrode 22 is not particularly limited and can be appropriately selected according to the purpose. However, from the viewpoint of preventing false detection, it is preferably larger than the size of the water droplet. Such a configuration can predict that rust generation is in progress even when a short circuit occurs due to a water droplet.

[0026] Note that the "fixed distance L" in this specification is the distance between the electrodes before the operation of the rust detection device, that is, the distance between the electrodes in the state before rust is generated.

[0027] As described above, the preferred embodiments of the present invention have been described in detail. However, the present invention is not limited to these embodiments, and various modifications or changes are possible within the scope of the gist of the present invention described in the claims.

Claims

[Claim 1] A rust detection device comprising a power supply, a first electrode, and a second electrode disposed at a certain distance from the first electrode, The first electrode comprises a first metal and a second metal which is less corroded than the first metal, on the surface of the first metal and in a region facing the second electrode. The rust detection device is characterized in that the second electrode has the first metal and the second metal on the surface of the first metal and in a region opposite to the first electrode.

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