JP6826470B2 - Anode electrode members, monitoring devices, and anticorrosion systems - Google Patents

Description

The present invention relates to an anode electrode member, a monitoring device, and an electrocorrosion protection system.

Conventionally, a method of knowing the degree of wear of the anode electrode has been known (see Patent Document 1). In this method, an anode electrode having a triangular cross-sectional shape is prepared, and a change with time of the anode current with an increase in the corrosion protection time of the anode electrode is measured (monitored). Specifically, the electrode material is eluted by the anode reaction, and the triangular-shaped anode electrode is thinned. In the triangular cross section of the anode electrode, since the anode electrode is thinned from the bottom surface to the apex, the bottom surface of the triangle is gradually reduced, and the water saving area is also reduced for a while. As a result, the anode current changes, so that it is possible to monitor the degree of wear of the anode electrode from the change in the anode current.

Further, a method and a monitoring system for monitoring the corrosion state of the cathode anticorrosion control probe are known (see Patent Document 2). This system monitors the corrosion status of the probe with the probe installed near the buried metal structure buried, and the effect of exposure of the buried metal structure to the corrosion status is frequent and over time. To grasp.

JP-A-2015-129346 Japanese Patent No. 5470191

By the way, in the method disclosed in Patent Document 1, there is a problem that the shape (triangular shape) of the anode electrode is limited. Further, the system disclosed in Patent Document 2 does not disclose a method or structure for monitoring the degree of wear of the anode electrode.

The present invention has been made in consideration of such circumstances, and an anode electrode member suitable for monitoring the thinning of the electrode body, a monitoring device for monitoring the thinning of the anode electrode member, and an anode electrode member. An object of the present invention is to provide an anticorrosion system using a monitoring device.

In order to solve the above problems, the anode electrode member according to the first aspect of the present invention is an anode electrode member attached to a piping flange, and has a first end region and a second end region adjacent to each other through a gap. It has an electrode body formed in a substantially C shape.
According to the anode electrode member according to the above aspect, it is possible to realize an anode electrode member suitable for monitoring the thinning of the electrode body in a state of being attached to the pipe flange.

The anode electrode member according to the above aspect includes a first coil wound around the first end region and a second coil wound around the second end region, and the first coil and the second coil are It may be integrated with the electrode body.

According to the anode electrode member according to the above aspect, it is possible to realize an anode electrode member in which the first coil and the second coil are integrated with the electrode body. Further, it is possible to realize an anode electrode member suitable for monitoring the thinning of the electrode body by using the first coil and the second coil. Since the first coil and the second coil are integrated with the electrode body, when the anode electrode member is replaced, the first coil and the second coil can be replaced while being attached to the electrode body. ..

The monitoring device according to the second aspect of the present invention is a monitoring device that monitors an anode electrode member, has a first end region and a second end region adjacent to each other through a gap, and is formed in a substantially C shape. An anode electrode member having an electrode body and arranged so that the inner surface of the electrode body is exposed inside a pipe, a first coil wound around the first end region, and a winding around the second end region. The second coil, the signal transmission unit electrically connected to the first coil, the signal detection unit electrically connected to the second coil, and the signal transmission unit and the signal detection unit are electrically connected. It is provided with a monitoring unit connected to the object.

According to the monitoring device according to the above aspect, the signal transmitting unit transmits an AC signal to the first coil. At this time, the magnetic field in the first end region changes, and the guide wave signal is propagated to the second end region due to the magnetic distortion effect. The second coil in the second end region outputs an AC signal generated by the guide wave signal. The signal detection unit detects the signal generated from the second coil. The monitoring unit can compare the signal transmitted by the signal transmitting unit with the signal detected by the signal detecting unit, and estimate the amount of wall thinning of the electrode body of the anode electrode member based on the attenuation ratio or the like.

The electrocorrosion protection system according to the third aspect of the present invention has an electrode body having a pipe provided with a pipe flange, a first end region and a second end region adjacent to each other through a gap, and a substantially C-shaped electrode body. An anode electrode member arranged so that the inner surface of the electrode body is exposed inside the pipe, a cathode electrode connected to the outside of the pipe, and wiring to the anode electrode member and the cathode electrode. It includes a DC power supply connected via the device and a monitoring device according to the second aspect.

According to the anticorrosion system according to the above aspect, a current is supplied to the anode electrode member from the DC power supply. Therefore, electrons are supplied to the inner surface of the pipe to which the cathode electrode is connected, that is, the inner surface of the pipe in contact with the fluid. The cations (positive ions) in the fluid are attracted to the piping, and the release of metal cations in the piping due to the corrosion reaction is suppressed. As a result, corrosion of the pipe can be suppressed. Further, since the above-mentioned monitoring device is provided, the amount of wall thinning of the electrode body of the anode electrode member can be estimated.

According to the above aspect of the present invention, an anode electrode member suitable for monitoring the thinning of the electrode body, a monitoring device for monitoring the thinning of the anode electrode member, and electricity using the anode electrode member and the monitoring device. An anticorrosion system can be provided.

It is a partial cross-sectional view which shows the schematic structure of the electric corrosion protection system provided with the anode electrode member which concerns on embodiment of this invention. It is the schematic which shows the structure of the monitoring device which monitors the anode electrode member which concerns on embodiment of this invention.

Hereinafter, the configuration of the electrocorrosion protection system including the anode electrode member according to the present embodiment will be described with reference to FIG.
In each drawing used for the description of the present embodiment, the scale of each member is appropriately changed in order to make each member recognizable in size.
In the present embodiment, the "fluid" includes, for example, seawater that may cause corrosion of the piping material.

(Electrical anticorrosion system)
The anticorrosion system 100 includes a pipe 70A (first pipe) having a pipe flange 71A (first flange), a pipe 70B (second pipe) having a pipe flange 71B (second flange), and an anode electrode member 1. The pipe 70A is provided with a cathode electrode 20 connected to the outside, a DC power supply 30 connected to the anode electrode member 1 and the cathode electrode 20 via wiring, and a monitoring device 50. The anode electrode member 1 is fixed between the piping flanges 71A and 71B. The inner surface 1A of the electrode body 10 of the anode electrode member 1 is exposed inside the pipes 70A and 70B. The cathode electrode 20 is connected to the outside of the pipe 70B.

An insulating seal member 15 is provided between the piping flanges 71A and 71B. The insulating seal member 15 covers and fixes the anode electrode member 1 and seals the connection portion between the piping flanges 71A and 71B.
The piping flanges 71A and 71B are fixed to each other by fastening members (not shown) using known bolts and nuts.

The wiring extending from each of the anode electrode member 1 and the cathode electrode 20 is connected to the DC power supply 30. The anode electrode member 1 is connected to the positive side of the DC power supply 30 via wiring. The cathode electrode 20 is connected to the negative side of the DC power supply 30 via wiring. The DC power supply 30 includes an AC-DC converter that converts a commercial power supply (alternating current) into DC, and a DC voltage can be applied between the anode electrode member 1 and the cathode electrode 20. Further, as the DC power source 30, for example, a primary battery, a secondary battery, a solar cell, or the like may be used. The voltage applied between the anode electrode member 1 and the cathode electrode 20 is about 1V to 2V.

(Anode electrode member)
Next, a schematic configuration of the anode electrode member according to the present embodiment will be described with reference to FIG.
The anode electrode member 1 is a member attached to the piping flanges 71A and 71B. The anode electrode member 1 has a first end region 11 and a second end region 12 adjacent to each other via a gap G, and has an electrode body 10 formed in a substantially C shape. Examples of the material constituting the anode electrode member 1 include carbon, graphite, ferrite and the like. The anode electrode member 1 constitutes a part of the monitoring device 50.

(Monitoring device)
Next, a schematic configuration of a monitoring device for monitoring the anode electrode member according to the present embodiment will be described with reference to FIG.
The monitoring device 50 covers the anode electrode member 1, the first coil 11A wound around the first end region 11 (transmitting portion) of the anode electrode member 1, and the second end region 12 (receiving portion) of the anode electrode member 1. The wound second coil 12A, the signal transmission unit 21 electrically connected to the first coil 11A via the first signal line L11, and the second coil 12A electrically via the second signal line L12. It has a connected signal detection unit 22, a signal transmission unit 21, and a monitoring unit 23 electrically connected to the signal detection unit 22.

The first end region 11 around which the first coil 11A is wound functions as a first magnetic pole portion 11B (first magnet) that forms a magnetic field. The second end region 12 around which the second coil 12A is wound functions as a second magnetic pole portion 12B (second magnet) that forms a magnetic field. In such a monitoring device 50, the signal transmitting unit 21 transmits an AC signal, the signal detecting unit 22 receives the AC signal, and the monitoring unit 23 measures the attenuation ratio.
Further, in the monitoring device 50, the inner surface 1A of the electrode body 10 of the anode electrode member 1 is arranged so as to be exposed inside the pipes 70A and 70B.

In the above configuration, the number of turns of the coil is adjusted as appropriate. The first coil 11A and the second coil 12A wound around the electrode body 10 may be integrated with the electrode body 10. In this case, when the anode electrode member 1 is replaced, the replacement is performed with the first coil 11A and the second coil 12A attached to the electrode body 10. Examples of the structure in which the first coil 11A and the second coil 12A are integrated with the electrode body 10 include a structure in which the first coil 11A and the second coil 12A are attached to the electrode body 10 by applying a resin material or the like. ..

On the other hand, when the anode electrode member 1 is replaced, the first coil 11A and the second coil 12A may be removed from the used electrode body, and the first coil 11A and the second coil 12A may be attached to the new electrode body for use. Good.

Next, the operation of the anticorrosion system 100 including the anode electrode member 1 and the monitoring device 50 configured as described above will be described.

As shown in FIG. 1, the anode electrode member 1 is sandwiched between the pipe flanges 71A and 71B, and the inner surface 1A of the electrode body 10 of the anode electrode member 1 is exposed inside the pipes 70A and 70B. The fluid flows in the pipes 70A and 70B in the direction shown in F.

A current is supplied from the DC power supply 30 to the anode electrode member 1. The current flows from the anode electrode member 1 to the inner surface of the pipe 70B via the fluid in the pipe 70B. Therefore, electrons are supplied to the inner surface of the pipe 70B to which the cathode electrode 20 is connected, that is, the inner surface of the pipe 70B in contact with the fluid. The cation (positive ion) in the fluid is attracted to the pipe 70B, and the release of the metal cation in the pipe 70B due to the corrosion reaction is suppressed.

Here, since the anode electrode member 1 acts as an anode and continues the anticorrosion function of the pipe 70B, the material of the electrode body 10 of the anode electrode member 1 in contact with the fluid is eluted from the inner surface 1A by the anode reaction. As the elution of the inner surface 1A progresses with the passage of time, the thickness of the electrode body 10 is reduced. Such thinning of the electrode body 10 is monitored by the monitoring device 50.

Hereinafter, the function of the monitoring device 50 will be specifically described.
The signal transmission unit 21 transmits an AC signal to the first coil 11A via the first signal line L11 as a signal for generating a guide wave signal. At this time, the magnetic field in the first end region 11 (transmitting portion) changes, and the guide wave signal is propagated to the opposite side of the anode electrode member 1, that is, the second end region 12 (receiving portion) due to the magnetic distortion effect. ..
The second coil 12A in the second end region 12 outputs an AC signal generated by the guide wave signal. The signal detection unit 22 detects the signal generated from the second coil 12A.

The monitoring unit 23 compares the signal transmitted by the signal transmitting unit 21 with the signal detected by the signal detecting unit 22, and estimates the amount of wall thinning of the electrode body 10 of the anode electrode member 1 based on the attenuation ratio and the like. The amount of wall thinning of the electrode body 10 is substantially proportional to the signal attenuation ratio, and it can be estimated that the larger the attenuation ratio (dB / m), the larger the amount of wall loss (mm) and the progress of corrosion.

By changing the frequency of the signal transmitted by the signal transmission unit 21, the sensitivity at the time of converting the attenuation ratio into the wall thinning amount can be adjusted. When the frequency is set to a relatively low frequency (about 10 kHz), the amount of wall thinning in a wide range can be measured with a high correlation with the attenuation ratio. Further, when the frequency is set to a relatively high frequency (50 to 130 kHz), a slight amount of wall thinning can be measured with high sensitivity. It is preferable that the monitoring device 50 is configured so as to measure the amount of wall loss by changing the frequency according to the situation at the measurement site.

As described above, according to the electrocorrosion protection system 100, the amount of wall thinning of the electrode body 10 of the anode electrode member 1 can be estimated, and the corrosion of the pipe 70B can be suppressed.

Although preferred embodiments of the present invention have been described above and described above, it should be understood that these are exemplary of the invention and should not be considered as limiting. Additions, omissions, substitutions, and other modifications can be made without departing from the scope of the invention. Therefore, the present invention should not be considered as limited by the above description, but is limited by the claims.

1 Anode electrode member 1A Inner surface 10 Electrode body 11 1st end region 11A 1st coil 11B 1st magnetic pole 12 2nd end region 12A 2nd coil 12B 2nd magnetic pole 15 Insulation seal member 20 Cathode electrode 21 Signal transmitter 22 Signal Detection unit 23 Monitoring unit 30 DC power supply 50 Monitoring device 70A, 70B Piping 71A, 71B Piping flange 100 Electrical corrosion protection system G Gap L11 1st signal line L12 2nd signal line

Claims (3)

An anode electrode member attached to a piping flange
An electrode body having a first end region and a second end region adjacent to each other through a gap and formed in a substantially C shape ,
The first coil wound around the first end region and
The second coil wound around the second end region and
With
The first coil and the second coil are anode electrode members integrated with the electrode body. A monitoring device that monitors the anode electrode members.
It has a first end region and a second end region adjacent to each other through a gap, and has an electrode body formed in a substantially C shape, and is arranged so that the inner surface of the electrode body is exposed inside the pipe. Anode electrode member and
The first coil wound around the first end region and
The second coil wound around the second end region and
A signal transmitter electrically connected to the first coil and
A signal detection unit electrically connected to the second coil,
A monitoring device including a signal transmitting unit and a monitoring unit electrically connected to the signal detecting unit. Piping with a piping flange and
It has a first end region and a second end region adjacent to each other through a gap, and has an electrode body formed in a substantially C shape, and is arranged so that the inner surface of the electrode body is exposed inside the pipe. Anode electrode member and
With the cathode electrode connected to the outside of the pipe,
A DC power supply connected to the anode electrode member and the cathode electrode via wiring, and
An electrocorrosion protection system comprising the monitoring device according to claim 2.

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