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Electrochemical probe for coating layer corrosion resistance in-situ testing and use method thereof

An in-situ testing and corrosion resistance technology, applied in the field of physical and chemical testing, achieves the effects of convenient operation, strong designability and wide application

Pending Publication Date: 2021-10-26
SHANDONG NON METALLIC MATERIAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for in-situ testing of coating corrosion resistance and its special electrochemical probe to solve the problems of aging evaluation of coatings in service, rapid evaluation of corrosion resistance and prediction of remaining life, etc.

Method used

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  • Electrochemical probe for coating layer corrosion resistance in-situ testing and use method thereof
  • Electrochemical probe for coating layer corrosion resistance in-situ testing and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The electrochemical probe used in the in-situ test of the corrosion resistance of metal-based coatings in this embodiment includes a vacuum adsorption device, a flexible conductor 1, a positive electrode 2, a negative electrode 5, an electrode joint and a flexible insulator 14, such as figure 1 and figure 2 shown.

[0026] The flexible conductor 1 is a square plate made of silicone rubber filled with conductive nano-silver particles, with a size of 50mm×10mm×2mm.

[0027] The positive electrode 2 is a silver electrode.

[0028] The electrode connectors include positive electrode connectors 3 and negative electrode connectors 4 .

[0029] The negative electrode 5 is a graphite electrode.

[0030] The vacuum adsorption device includes an insulating shell 6 , a sealing ring 7 , a piston 8 , a rotatable fixed pin 9 and a fixed pin support 10 . The insulating shell 6 is made of polycarbonate material, and its shape is a cuboid with a size of 50mm×30mm×50mm. The inner ca...

Embodiment 2

[0035] The difference from Example 1 is:

[0036] The electrochemical probe of this embodiment is used for in-situ testing of the corrosion resistance of ceramic-based coatings.

[0037] The flexible conductor 1 is a 1 / 4 annular plate with a thickness of 5 mm, an outer diameter of 50 mm, and an inner diameter of 40 mm, and is made of a water-absorbing polymer filled with 3.5% NaCl electrolyte.

[0038] The positive electrode 2 is a platinum electrode.

[0039] The negative electrode 5 is a platinum black electrode.

[0040] The insulating shell 6 is made of glass fiber reinforced plastic material. Its shape is a cylinder with a height of 60mm and a diameter of 50mm. The inner cavity is a groove with a height of 50mm and ф40mm. direction through holes. The sealing ring 7 is a hydrogenated nitrile rubber lip ring. Piston 8 is made of glass fiber reinforced plastics, including a circular plate and a cylinder with a diameter of 8 mm fixed in the middle of its upper surface, an...

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PUM

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Abstract

The invention discloses a method for coating layer corrosion resistance in-situ testing and a special electrochemical probe thereof. According to the method for coating layer corrosion resistance in-situ testing, the probe is directly adsorbed on the surface of a detected coating layer by virtue of negative pressure, so that metal-based, ceramic-based, non-metal-material-based and other coating layers can be detected without damaging the coating layer, in-situ nondestructive detection of in-service equipment coating layers and coating layer samples can be realized, the repeatability of test results is ensured, and the method is suitable for detecting the corrosion resistance of various coating layer materials. The special electrochemical probe has the advantages of simple structure, strong designability, wide application range, convenience in operation, high efficiency and the like.

Description

technical field [0001] The invention belongs to the technical field of physical and chemical testing, and relates to a coating corrosion resistance testing technology, in particular to a method for in-situ testing of coating corrosion resistance and a special electrochemical probe thereof. Background technique [0002] Coatings are affected by physical and chemical factors during use and aging occurs. Rapid evaluation of coating anti-corrosion properties can improve the service safety of equipment. [0003] After the coating is aged, the appearance shows loss of light, discoloration, pulverization, blistering, rust, mildew, peeling, staining, etc., and the essence shows blocking, electrochemical (corrosion inhibition or cathodic protection) and adhesion, etc. Degradation of several properties and eventually loss of protection of the metal. Since the coating always contains more or less hydrophilic groups and water-soluble components, which will be affinity with water and ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/02G01N17/04
CPCG01N17/02G01N17/04
Inventor 王登霞李晖邹德广庞明磊谢可勇王新波段剑孙岩
Owner SHANDONG NON METALLIC MATERIAL RES INST