(1.Department of Equipment Support and Remanufacturing, Academy of Army Armored Force, Beijing 100072, China） (2. State Grid Ningbo Power Supply Company, Ningbo 315201, China） (3. Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China）
A kind of waterborne phosphate high temperature resistant anticorrosive coating (grade ZK052) was prepared in this paper, and coated spherical aluminum powder was used as pigment. The ZK052 coating exhibited excellent anti-corrosion and high-temperature salt spray resistance. The electrochemical testing, high-temperature salt spray accelerating test and corrosion morphology characterization were used to explore the high temperature resistance and corrosion resistance mechanism of the coating on carbon steel substrate. The high temperature resistance and corrosion resistance of ZK052 and Sermetel W water-based coatings coated on Q235 carbon steel were compared. Results indicated that ZK052 coating and Sermetel W coating exhibited good high temperature resistance and corrosion resistance to Q235 carbon steel. Both ZK052 coating and Sermetel W coating could inhibit both anodic oxidation and cathodic reduction of carbon steel in 5wt% NaCl solution, and reduce the self-corrosion current density of carbon steel in 5wt% NaCl solution by 10 times.