Rust detection device

Abstract

A rust detection device is provided with a power source, a first electrode, and a second electrode disposed at a predetermined distance from the first electrode. The first electrode has a first metal and a second metal that is less susceptible to corrosion than the first metal in a region facing the second electrode on the surface of the first metal. The second electrode has the first metal and the second metal on a surface of the first metal and in a region facing the first electrode.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a rust detection device. BACKGROUND

[0002] A rust detection device is, for example, arranged around an electric component in a car, thereby detecting a degree of generation of rust, and notifying a user of a precursor to a functional failure, thereby enabling promotion of component replacement.

[0003] For example, in Patent Literature 1 described below, as one of corrosion monitoring methods, a resistance type corrosion sensor that measures a corrosion amount of a sensor portion based on an increase amount of a resistance value accompanying a decrease in a plate thickness of the sensor portion is disclosed.

[0004] PRIOR ART DOCUMENTS

[0005] PATENT LITERATURE

[0006] Patent Literature 1: Japanese Patent Application Publication No. 2016-197102 SUMMARY

[0007] PROBLEMS TO BE SOLVED BY THE INVENTION

[0008] In the rust detection device described in Patent Literature 1 described above, the degree of corrosion is determined by directly measuring the resistance value in the sensor portion. It is expected that in a high-temperature environment, in a severe corrosion environment, the decrease amount of the thickness of the measurement electrode becomes large, and the measurement of the resistance value becomes difficult. Thus, in the conventional rust detection device, it is difficult to perform accurate measurement of the resistance value for a long period of time, and there is a risk of false detection.

[0009] MEANS FOR SOLVING THE PROBLEMS

[0010] A rust detection device according to an embodiment for solving the above-described problems includes a power supply, a first electrode, and a second electrode arranged apart from the first electrode by a certain distance, wherein

[0011] the first electrode has a first metal and a second metal that is less likely to corrode than the first metal at a region on a surface of the first metal and opposite to the second electrode,

[0012] the second electrode has the first metal and the second metal at a region on a surface of the first metal and opposite to the first electrode.

[0013] EFFECTS OF THE INVENTION

[0014] According to the present application, it is possible to provide a rust detection device that can reduce the occurrence of false detection caused by corrosion. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1is a schematic diagram showing an example of a process of rust growth in the rust detection device of the present application. DETAILED DESCRIPTION

[0016] (Rust detection device)

[0017] The rust detection device of the present application has a power supply, a first electrode, and a second electrode disposed apart from the first electrode, and can have other units as necessary.

[0018] Here, the use of Figure 1 The rust detection device of the present application will be described in detail. Note that, Figure 1 is a schematic diagram showing an example of a process of rust growth in the rust detection device of the present application.

[0019] Figure 1 The rust detection device 100 shown has a power supply 1, a first electrode 21, and a second electrode 22.

[0020] (Power supply)

[0021] As the power supply 1, there is no particular limitation as long as it can supply power to the first electrode 21 and the second electrode 22, and a publicly known power supply can be appropriately selected.

[0022] (Electrode)

[0023] The first electrode 21 has a first metal 31 and a second metal 32 in a region on the surface of the first metal 31 and opposite the second electrode 22, and can have other components as necessary.

[0024] The second electrode 22 has a first metal 31 and a second metal 32 in a region on the surface of the first metal 31 and opposite the first electrode 21, and can have other components as necessary.

[0025] In the present application, any one of the electrodes in the electrode group can be set as the first electrode 21 or the second electrode 22. Note that, in Figure 1 , for convenience, the electrode on the left side in Figure 1 is set as the first electrode, and the electrode on the right side in Figure 1 is set as the second electrode.

[0026] -First metal-

[0027] As the first metal 31, there is no particular limitation, and a commonly used electrode component can be used, and examples thereof include iron (Fe), copper (Cu), and the like.

[0028] -Second metal-

[0029] The second metal 32 is a metal that is less likely to corrode than the first metal 31. As the second metal 32, there is no particular limitation as long as it is a metal that is less likely to corrode than the first metal 31, and it can be appropriately selected according to the purpose, and for example, gold (Au) or the like can be mentioned.

[0030] As a method of disposing the second metal 32 on the surface of the first metal 31, there is no particular limitation, and it can be appropriately selected according to the purpose, and for example, a method of winding a wire composed of the second metal 32 around the first metal 31 or the like can be mentioned.

[0031] Here, the use of Figure 1 The mechanism of the present application will be described in detail.

[0032] Figure 1 (a) of FIG. 1 indicates a state before the rust detection device 100 is operated. Specifically, the first electrode 21 and the second electrode 22 are disposed apart by a certain distance, and thus are in a state where no current flows.

[0033] Figure 1 (b) of FIG. 1 indicates a state where rust 4 is generated after the rust detection device 100 is operated. Specifically, it is a state where each electrode is expanded 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.

[0034] Figure 1 (c) of FIG. 1 indicates a state where the electrodes are in contact due to the expansion of the electrodes caused by the rust 4 generated by the operation of the rust detection device 100. Specifically, the second metal 32 disposed on the surface of each electrode and opposite to the other electrode is in contact due to the expansion of the electrodes caused by the rust generation, and a current flows along Figure 1 the arrow direction in (c) of FIG. 1.

[0035] By detecting the current thus generated, the generation of rust can be detected.

[0036] In the present specification, the "region opposite to the first electrode" and the "region opposite to the second electrode" refer to regions where the first electrode 21 and the second electrode 22 come into contact when they are expanded due to the rust 4.

[0037] As the certain distance L provided between the first electrode 21 and the second electrode 22, there is no particular limitation, and it can be appropriately selected according to the purpose, but from the viewpoint of preventing false detection, it is preferably greater than the size of a water droplet. With such a structure, even in the case where a short circuit occurs due to a water droplet, it can be predicted that the generation of rust is in progress.

[0038] Note that the "certain distance L" in the present specification is the distance between the electrodes before the rust detection device is operated, that is, the distance between the electrodes in the state before the rust is generated.

[0039] While the preferred embodiments of the present application have been described above, the present application is not limited to these embodiments, and various modifications or changes can be made within the scope of the present application as set forth in the claims.

Claims

1. A rust detecting device having a power source, a first electrode, and a second electrode disposed apart from the first electrode by a distance, characterized in that, the first electrode has a first metal and a second metal that is less prone to corrosion than the first metal at a region on the surface of the first metal and opposite the second electrode, the second electrode has the first metal and the second metal at a region on the surface of the first metal and opposite the first electrode.

2. The rust detecting device according to claim 1, wherein the second electrode has a third metal that is less prone to corrosion than the first metal at a region on the surface of the first metal and opposite the first electrode.

3. The rust detecting device according to claim 1, wherein the second electrode has a fourth metal that is less prone to corrosion than the first metal at a region on the surface of the first metal and opposite the first electrode.

4. The rust detecting device according to claim 1, wherein the second electrode has a fifth metal that is less prone to corrosion than the first metal at a region on the surface of the first metal and opposite the first electrode.

5. The rust detecting

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