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Method and electrolytic oxidation device for detecting film layer on surface of metal

A metal surface, electrolytic oxidation technology, applied in measuring devices, electromagnetic measuring devices, measuring electrical variables, etc., to achieve the effect of simple operation

Inactive Publication Date: 2011-02-16
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the main problems existing in the methods for detecting the quality of the metal surface film or coating at present, and proposes to use plasma electrolytic oxidation technology to detect the quality of the metal surface film or coating

Method used

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  • Method and electrolytic oxidation device for detecting film layer on surface of metal
  • Method and electrolytic oxidation device for detecting film layer on surface of metal
  • Method and electrolytic oxidation device for detecting film layer on surface of metal

Examples

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Embodiment 1

[0040]Plasma electrolytic oxidation detects the film thickness of magnesium metal samples coated with ceramic film on the surface, and the plasma electrolytic oxidation device includes three parts: DC power supply 1, data acquisition and processing system 3 and plasma electrolytic oxidation tank 6; the output current of DC power supply 1 is 0~2.5A, the voltage output is 0~700V; the positive pole of the power supply is connected to the sample 4 to be tested as the anode, the negative pole of the power supply is connected to the stainless steel plate auxiliary electrode 5 as the cathode, and the output current and voltage signals of the DC power supply 1 pass through the data The line 2 is input into the computer data acquisition system 3; the sample to be tested 4 and the auxiliary electrode 5 are placed in the plasma electrolytic oxidation tank 6, and the plasma electrolytic oxidation tank 6 has a circulating water cooling jacket 7, and the function of the cooling jacket is to k...

Embodiment 2

[0060] Plasma electrolytic oxidation detection surface corrosion resistance of aluminum metal surface coated with ceramic film, plasma electrolytic oxidation device, including DC power supply 1, data acquisition and processing system 3 and plasma electrolytic oxidation tank 6 three parts; the output current of DC power supply 1 is 0~2.5A, the voltage output is 0~700V; the positive pole of the power supply is connected to the sample 4 to be tested as the anode, the negative pole of the power supply is connected to the stainless steel plate auxiliary electrode 5 as the cathode, and the output current and voltage signals of the DC power supply 1 pass through the data The line 2 is input into the computer data acquisition system 3; the sample to be tested 4 and the auxiliary electrode 5 are all placed in the plasma electrolytic oxidation tank 6, and the plasma electrolytic oxidation tank 6 has a circulating water cooling jacket 7, and the circulating cooling water jacket is used for...

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Abstract

The invention discloses a method and electrolytic oxidation device for detecting a film layer on the surface of metal. The method specifically comprises the following steps: (1) pretreating the surface of metal to be detected; (2) preparing alkaline silicate electrolyte; and (3) carrying out plasma electrolytic oxidation. The electrolytic device comprises a direct-current power supply, a data acquisition and processing system and a plasma electrolytic oxidation tank, wherein the output current of the direct-current power supply is 0-2.5A and the output voltage thereof is 0-700V; the positive electrode of the direct-current power supply is connected with a sample to be detected and the negative electrode thereof is connected with an auxiliary electrode; the output current and voltage signals of the direct-current power supply are transmitted to the data acquisition and processing system via a data line; and the sample to be detected and the auxiliary electrode are placed in the plasma electrolytic oxidation tank. The detection method is simple to operate, is suitable for the samples made of different materials (aluminium, magnesium, titanium, chromium, iron, zinc and the like or alloys of the metals) and is also suitable for detecting the surfaces of the samples with various complex shapes (grooves, internal surfaces of the materials, etc).

Description

technical field [0001] The invention belongs to the field of detection of a film layer on the surface of a metal material, and specifically refers to the detection of a film layer with poor conductivity by using the principle of plasma electrolysis. Background technique [0002] Plasma electrolytic oxidation technology uses plasma discharge to directly grow oxide ceramic films on the surface of magnesium, aluminum, titanium and other metals through complex electrochemical, plasma chemical and thermal chemical processes. Plasma electrolysis, as a unique plasma application technology, refers to applying a certain voltage between the electrode and the solution, breaking down the solution vapor layer formed by Joule heat around the electrode, generating discharge plasma, and then discharging the solution or the pair The process of treating the electrode surface. Plasma electrolysis actually uses the electrolytic solution as an electrode, and maintains the discharge plasma betwe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/48G01R27/00G01B7/06
Inventor 严宗诚陈砺王红林王丽
Owner SOUTH CHINA UNIV OF TECH
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