Electrode, corrosion analysis device, and corrosion analysis method

Patent metadata

Field	Value
Publication number	US-11821817-B2
Application number	US-201917287215-A
Country	US
Kind code	B2
Filing date	Nov 1, 2019
Priority date	Nov 16, 2018
Publication date	Nov 21, 2023
Grant date	Nov 21, 2023

Abstract

To provide a technology capable of analyzing soil corrosion of an underground buried metal material. There is provided an electrode for analyzing corrosion of a buried metal material in real time, the electrode including: a metal portion composed of a metal material; a metal fixation portion covering and fixing the metal portion except on an exposed surface thereof; a plurality of particles arranged so as to be in contact with the exposed surface; a gelation substance portion covering the plurality of particles and being in close contact with the exposed surface and the metal fixation portion; and a conduction portion that secures electric conduction with the metal portion, wherein the plurality of particles and the gelation substance portion transmit light.

First claim

The invention claimed is:

1. An electrode for analyzing corrosion of a buried metal material in real time, the electrode comprising an electrode structure having:
a metal portion composed of a metal material;
a metal fixation portion covering the entire metal portion except an exposed surface of the metal portion and fixing the metal portion in the electrode structure;
a plurality of particles arranged so as to be in contact with the exposed surface;
a gelation substance portion covering the plurality of particles and being in close contact with the exposed surface and the metal fixation portion; and
a conduction portion that secures electric conduction with the metal portion, wherein
the plurality of particles and the gelation substance portion each transmit light.

2. The electrode according to claim 1 , wherein the gelation substance portion contains water for supplying moisture to the exposed surface.

3. The electrode according to claim 1 , comprising:
the metal portion comprising a plurality of metal portions positioned in the metal fixation portion; and
the conduction portion comprising a plurality of conduction portions, each of the plurality of conduction portions being connected to a single metal portion of the plurality of metal portions.

4. A corrosion analysis device comprising:
the electrode according to claim 1 ;
an image capture unit positioned adjacent to the exposed surface that captures an image of the exposed surface from a direction that allows for capturing an image of the plurality of particles and the gelation substance portion;
an electrochemical measurement unit that is connected to the electrode via the conduction portion and performs electrochemical measurement of the electrode; and
an analysis unit connected to the image capture unit and the electrochemical unit that calculates a corrosion rate of the metal portion using an image captured by the image capture unit and a measurement result of the electrochemical measurement unit.

5. The corrosion analysis device according to claim 4 , wherein the analysis unit calculates an area of an active region of corrosion on the exposed surface from the captured image and corrects the corrosion rate calculated using the measurement result of the electrochemical measurement unit using the area of the active region.

6. A corrosion analysis method performed by the corrosion analysis device according to claim 4 , the method comprising:
an image capturing step capturing an image of the exposed surface of the metal portion;
an electrochemical measurement step of parallelly performing electrochemical measurement of the electrode and the image capturing step; and
a step of calculating a corrosion rate of the metal portion with the analysis unit using the captured image in the image capturing step and the measurement result in the electrochemical measurement step.

7. The electrode according to claim 2 , comprising:
the metal portion comprising a plurality of metal portions positioned in the metal fixation portion; and
the conduction portion comprising a plurality of conduction portions, each of the plurality of conduction portions being connected to a single metal portion of the plurality of metal portions.

8. A corrosion analysis device comprising:
electrode according to claim 2 ;
an image capture unit positioned adjacent to the exposed surface that captures an image of the exposed surface from a direction that allows for capturing an image of the plurality of particles and the gelation substance portion;
an electrochemical measurement unit that is connected to the electrode via the conduction portion and performs electrochemical measurement of the electrode; and
an analysis unit connected to the image capture unit and the electrochemical unit that calculates a corrosion rate of the metal portion using an image captured by the image capture unit and a measurement result of the electrochemical measurement unit.

9. A corrosion analysis device comprising:
electrode according to claim 3 ;
an image capture unit positioned adjacent to the exposed surface that captures an image of the exposed surface from a direction that allows for capturing an image of the plurality of particles and the gelation substance portion;
an electrochemical measurement unit that is connected to the electrode via the conduction portion and performs electrochemical measurement of the electrode; and
an analysis unit connected to the image capture unit and the electrochemical unit that calculates a corrosion rate of the metal portion using an image captured by the image capture unit and a measurement result of the electrochemical measurement unit.

10. A corrosion analysis method performed by the corrosion analysis device according to claim 5 , the method comprising:
an image capturing step capturing an image of the exposed surface of the metal portion;
an electrochemical measurement step of parallelly performing the electrochemical measurement of the electrode and image capturing step; and
a step of calculating a corrosion rate of the metal portion with the analysis unit using the captured image in image capturing step and the measurement result in the electrochemical measurement step.

Assignees

• Nippon Telegraph & Telephone

Inventors

• Oki Shota
• Mineta Shingo
• Mizunuma Mamoru
• Tsuda Masayuki

Classifications

• G01N17/006 Primary

  of metals · CPC title

• G01N17/02 Primary

  Electrochemical measuring systems for weathering, corrosion or corrosion-protection measurement · CPC title

• G01N27/02

  by investigating impedance · CPC title

• G01N27/26

  by investigating electrochemical variables; by using electrolysis or electrophoresis · CPC title