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An electrochemical nondestructive testing device and method for detecting metal surface defects

A metal surface, non-destructive testing technology, applied in the direction of material electrochemical variables, etc., to achieve the effect of convenient operation, intuitive and clear measurement results, and high measurement accuracy

Inactive Publication Date: 2017-10-27
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

but can only detect magnetic materials
Moreover, the above-mentioned detection means are all purely physical means

Method used

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  • An electrochemical nondestructive testing device and method for detecting metal surface defects
  • An electrochemical nondestructive testing device and method for detecting metal surface defects
  • An electrochemical nondestructive testing device and method for detecting metal surface defects

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Embodiment 1

[0034]An electrochemical nondestructive testing device for detecting metal surface defects, including a metal sample to be tested, an ion-conducting membrane, a reference electrode, a multi-channel electrode probe and an electrochemical measuring device, the multi-channel electrode probe is arranged on the metal sample to be tested The upper surface of the multi-channel electrode probe is composed of phenolic resin and metal electrode rods, and an ion conducting film is arranged between the bottom end of the multi-channel electrode probe (ie, the probe detection end) and the upper surface of the metal sample to be tested. The ion-conducting membrane is in close contact with the bottom end of the multi-channel electrode probe and the upper surface of the metal sample to be tested. The reference electrode is set above the metal sample to be tested and is in close contact with the ion-conducting membrane. The multi-channel electrode probe The top of the terminal (that is, the sign...

Embodiment 2

[0047] An electrochemical nondestructive testing device for detecting metal surface defects, including a metal sample to be tested, an ion-conducting membrane, a reference electrode, a multi-channel electrode probe and an electrochemical measuring device, the multi-channel electrode probe is arranged on the metal sample to be tested The upper surface of the multi-channel electrode probe is composed of phenolic resin and metal electrode rods, and an ion conducting film is arranged between the bottom end of the multi-channel electrode probe (ie, the probe detection end) and the upper surface of the metal sample to be tested. The ion-conducting membrane is in close contact with the bottom end of the multi-channel electrode probe and the upper surface of the metal sample to be tested. The reference electrode is set above the metal sample to be tested and is in close contact with the ion-conducting membrane. The multi-channel electrode probe The top of the terminal (that is, the sig...

Embodiment 3

[0060] An electrochemical nondestructive testing device for detecting metal surface defects, including a metal sample to be tested, an ion-conducting membrane, a reference electrode, a multi-channel electrode probe and an electrochemical measuring device, the multi-channel electrode probe is arranged on the metal sample to be tested The upper surface of the multi-channel electrode probe is composed of phenolic resin and metal electrode rods, and an ion conducting film is arranged between the bottom end of the multi-channel electrode probe (ie, the probe detection end) and the upper surface of the metal sample to be tested. The ion-conducting membrane is in close contact with the bottom end of the multi-channel electrode probe and the upper surface of the metal sample to be tested. The reference electrode is set above the metal sample to be tested and is in close contact with the ion-conducting membrane. The multi-channel electrode probe The top of the terminal (that is, the sig...

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Abstract

The invention discloses an electro-chemical nondestructive detection device and method for detecting metal surface defects. According to the method, proper sensing electrode beams and reference electrodes are selected according to the material and surface shape of a to-be-detected sample, a device with a zero-resistance circuit is adopted for acquiring potential signals, a visual potential distribution diagram of the metal surface is obtained through processing of Origin software, the potential distribution diagram is analyzed through electro-chemical knowledge, cathode and anode regions are determined, the corrosion condition of all the regions of the metal surface is inferred, and then the positions and the shapes of the defects are determined. Compared with a traditional method for metal surface defect nondestructive detection, an electro-chemical means is adopted in the method, the method is more visual and distinct, easy to operate and high in measuring accuracy and precision, and is not limited by the surface shape, and the defects of other physical detection means can be overcome.

Description

technical field [0001] The invention relates to the technical field of non-destructive testing, and specifically collects potential signals of a metal surface by a sensor electrode probe beam and draws to obtain a surface potential distribution map, and then analyzes the defect distribution on the sample surface. Background technique [0002] Non-destructive testing is now a mature technology, mainly including (1) penetrant testing (PT); (2) eddy current testing (ET); (3) ultrasonic testing (UT); (4) radiographic testing (RT); ( 5) Magnetic memory detection. Each detection method has its own advantages and disadvantages. For example: Ultrasonic phased array detection: fast scanning speed, high accuracy, all-round scanning, suitable for measuring internal defects and surface defects with a certain depth, not only can measure the position of defects, but also can measure the shape of defects, size. However, it is easily affected by subjective and objective factors, and the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/26
CPCG01N27/26
Inventor 高志明刘晓玉夏大海修妍胡文彬刘永长
Owner TIANJIN UNIV