A waterborne anti-corrosion coating system was prepared by spraying waterborne epoxy zinc-rich primer,waterborne epoxy micaceous iron intermediate paint and waterborne acrylic polyurethane topcoat on the surface of Q235 carbon steel.The corrosion resistance of the coating system in simulated marine atmospheric environment was systematically studied by cyclic salt spray test combined with adhesion and gloss test,electrochemical test and so on.The results show that the adhesion of the coating decreased gradually at the beginning of the cyclic salt spray test,and then the chang was not obvious.After 1 200 h cyclic salt spray test,the adhesion was still as high as 6 MPa,which could meet the Class Ⅰ standard in the technical requirements.After 1 200 h test,the low-frequency impedance value of the coating was still as high as 108 Ω·cm2,indicating that the coating could provide excellent protection performance for power transmission and transformation equipment in marine climate.
关键词
电力设备/水性防腐蚀涂层/循环盐雾试验/防护作用
Key words
power equipment/waterborne anticorrosive coating/cyclic salt spray test/protective performance
维普
万方数据