Preparation of polyureabased iron red anticorrosive coating for pipelines
(1. School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin, Heilongjiang 150040, China; 2. Key Laboratory of Engineering Electrolytes of Ministry of Education, Harbin University of Science and Technology, Harbin, Heilongjiang 150080, China)
Abstract：To solve the problems of solvent volatilization and slow curing of commonly used iron oxide red anticorrosive coatings for underground pipelines, polyaspartic acid polyurea was used as matrix with iron oxide red as pigment filler to prepare polyurea anticorrosive coatings. FTIR test was used to characterize the structure of polyurea, and the anticorrosive properties of coating were characterized by salt spray resistance time and electrochemical test. The results show that the prepared polyaspartic acid polyurea is suitable for coating application. The polyurea anticorrosive coating has excellent anticorrosive properties. When the iron oxide red content is 10%, the salt spray resistance time can reach 260 h, and the maximum corrosion potential is -0887 6 V with the minimum corrosion current density of 2.608×10-5 A·cm-2.
