A kind of conductive anticorrosion coating and its corrosion resistance evaluation method
A conductive anti-corrosion and corrosion-resistant technology, applied in conductive coatings, anti-corrosion coatings, weather resistance/light resistance/corrosion resistance, etc., can solve the problems of poor heat resistance, insufficient adhesion, poor paint construction performance, etc., and achieve excellent electrical conductivity. the effect of improving electrical conductivity and corrosion resistance, and high electrical conductivity
Active Publication Date: 2021-05-07
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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Problems solved by technology
[0007] This application provides a conductive anti-corrosion coating and its corrosion resistance evaluation method, in order to solve the problem of insufficient electrical conductivity of the existing conductive anti-corrosion coating, poor construction performance of the coating, insufficient adhesion, poor heat resistance, and the resistance of the existing conductive anti-corrosion coating. Corrosion evaluation method only conducts qualitative comparison of conductive anti-corrosion coatings
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Embodiment 1
[0065] A method for evaluating corrosion resistance of conductive anticorrosion coatings, said method comprising:
[0066] Step S1, obtaining the surface area, current, impedance modulus, average corrosion rate, and maximum pitting corrosion rate of the test substrate sample and the grounded sample of the conductive anti-corrosion coating;
[0067] The impedance modulus values of the test substrate sample and the conductive anticorrosion paint grounding sample are respectively denoted as C i and C j , the impedance modulus is the impedance modulus at a preset frequency, the preset frequency is f=0.01 Hz, and the impedance modulus is the impedance spectrum evaluation score.
[0068] Step S2, according to the obtained surface area, respectively calculate the ratio of the corrosion surface area of the test substrate sample and the conductive anti-corrosion paint grounding sample to the entire area;
[0069] According to the electric current that obtains, calculate respectiv...
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Abstract
The application discloses a conductive anti-corrosion coating and its corrosion resistance evaluation method. The conductive anti-corrosion coating includes a surface layer, an intermediate layer and a bottom layer from top to bottom. The surface layer is a modified graphene oxide-polyurethane composite material, which has strong corrosion resistance. Abrasive. The middle layer is polyaniline / modified graphene / silver-epoxy resin composite material, which prevents the exposure of silver particles and direct contact with the grounding grid, and improves the conductivity and corrosion resistance. The bottom layer is a polyaniline / modified graphene-epoxy resin / polyurethane composite material with high electrical conductivity. The conductive anti-corrosion coating provided by the application has excellent electrical conductivity, corrosion resistance and abrasion resistance. The corrosion resistance evaluation method of conductive anti-corrosion coatings can accurately and quantitatively judge the corrosion resistance of conductive anti-corrosion coatings by calculating the ratio of the corrosion resistance of the grounded sample of the conductive anti-corrosion coating to the corrosion resistance of the test substrate sample.
Description
technical field [0001] The present application relates to the field of electrical anti-corrosion, in particular to a conductive anti-corrosion coating and a method for evaluating its corrosion resistance. Background technique [0002] At present, conductive anti-corrosion coatings can be divided into structural conductive anti-corrosion coatings and filled conductive anti-corrosion coatings. [0003] Structural conductive anti-corrosion coatings refer to the anti-corrosion coatings that have conductive functions due to the structure of the film-forming agent itself or after a certain doping treatment. The most typical ones are polyaniline, polypyrrole, polythiophene, polyquinoline and the like. Filled conductive anti-corrosion coating refers to the anti-corrosion coating formed by uniform mixing of film-forming agent and conductive filler. When the amount of conductive filler added exceeds a certain value, the conductive filler forms a continuous conductive path in the fil...
Claims
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IPC IPC(8): C09D175/04C09D7/62C09D163/00C09D179/02C09D7/61C09D5/10C09D5/24G01N17/00
CPCC08K2003/0806C08L2201/04C08L2205/03C09D5/10C09D5/24C09D163/00C09D175/04C09D7/61C09D7/62G01N17/00C08K3/042C08L79/02C08K3/08C08L75/04
Inventor 杨宇玲郭新良宋美华张少泉陈晓云马显龙
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST