亿电竞

strategy Emerging industries
Application of graphene conductive coating for corrosion protection of coastal grounding grid
Time: 2019/5/13 9:45:35

China亿电竞平台 Powder Net News Power system grounding grid is an important component to ensure high current signal conduction of transmission tower and substation, which plays an important role in dispersing current and ensuring safe and stable operation of power equipment. However, long-term buried metal components in coastal soil will cause corrosion damage, so the亿电竞 research on corrosion protection is very urgent. With the亿电竞 furthe亿电竞r research of carbon nanomaterials, carbon nanomaterials have been paid more attention. Recently, researchers have tried to use graphene's conductivity and related materials to explore a new anti-corrosion technology for grounding grid.

Film Adhesion


Impact resistance test of paint film

EIS diagram of carbon steel Q235 coated with conductive anticorrosive coating in 3.5 wt.% NaCl solution


Through the亿电竞 literature review of related work done by Chen Kefeng of Zhejiang Ocean University, we know that the亿电竞 research takes epoxy resin as the亿电竞 carrier, explores a new solvent type graphene based conductive anti-corrosion coating with long-term anti-corrosion by optimizing the亿电竞 formulation and taking epoxy resin as the亿电竞 carrier. In the亿电竞 experiment, the亿电竞 adhesion, impact resistance and bonding strength between the亿电竞 film and the亿电竞 substrate were tested The亿电竞平台 corrosion resistance of the亿电竞 coating was investigated by electrochemical impedance spectroscopy and electrochemical impedance spectroscopy after immersion in salt fog for 250 H The亿电竞平台 results of 1500 h test and wet adhesion test show that the亿电竞 coating has excellent long-term corrosion resistance; the亿电竞 volume resistivity, surface contact resistance and high current impact resistance tests show that the亿电竞 conductive anti-corrosion coating has good electrical performance.


Nyquist diagram of solvent free graphene based conductive coating / carbon steel Q235 in 3.5 wt.% NaCl solution


At the亿电竞 same time, the亿电竞 solvent-free solvent based conductive coating was designed to replace the亿电竞 solvent based organic solvent. In addition, the亿电竞 corrosion resistance of the亿电竞 coating is not obvious at the亿电竞 edge of the亿电竞 coating, which is not affected by the亿电竞 corrosion resistance of the亿电竞 coating; The亿电竞平台 volume conductivity test shows that the亿电竞 conductivity of the亿电竞 conductive coating is not as good as that of solvent based conductive anticorrosive coating, but it is improved compared with the亿电竞 conventional conductive anti-corrosion coating.


 
return