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Metal surface defect detection method based on electrochemical nondestructive testing device

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

Inactive Publication Date: 2017-11-24
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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  • Metal surface defect detection method based on electrochemical nondestructive testing device
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  • Metal surface defect detection method based on electrochemical nondestructive testing device

Examples

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Embodiment 1

[0035] 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 2

[0048] 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

[0061] 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 a metal surface defect detection method based on an electrochemical nondestructive testing device. According to the method, a proper sensing electrode bundle and a reference electrode are selected according to a to-be-tested sample material and a surface shape; an electric potential signal is collected by using a device with a zero resistance circuit; Origin software is used for processing, so as to obtain a metal surface intuitive electric potential distribution map; the electric potential distribution map is analyzed by using electrochemical knowledge, so as to determine a cathode zone and an anode zone; and corrosion conditions of each zone on the surface of metal are deduced, so as to determine a position and a shape of a defect. Compared with traditional nondestructive metal surface defect detection methods, the method is an electrochemical method, has the advantages of more intuitition and clearness, easy operation, high measurement precision, high accuracy, no limit of surface shape, and can overcome defects of other physical detection methods.

Description

[0001] The application of the present invention is a divisional application of "an electrochemical nondestructive testing device and method for detecting metal surface defects". The application date of the parent application is February 25, 2015, and the application number is 2015100872777. technical field [0002] 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 [0003] 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 spe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/26
CPCG01N27/26
Inventor 高志明刘晓玉胡文彬夏大海修妍刘永长
Owner TIANJIN UNIV