▎ 摘　　要

NOVELTY - Preparing graphene modified coating material comprises (i) taking polyetherimide in N-methyl pyrrolidone solution, mixing and stirring to obtain film preparation liquid; taking polyethylene pyrrolidine dissolved in dichloromethane solution, mixing and stirring to obtain graphene sheet solution; (ii) taking the graphene sheet solution for ultrasonic, mixing and stirring to obtain first graphene sheet dispersion liquid; (iii) taking the film-making liquid dropping into the first graphene sheet dispersion liquid, and then performing ultrasonic, mixing and stirring to obtain second graphene sheet dispersion liquid; and (iv) taking the second graphene sheet dispersion liquid to steam the methylene dichloride, after the second graphene sheet dispersion liquid without bubble, adding curing agent, mixing and stirring. USE - The material is used as an anticorrosive material (claimed). ADVANTAGE - The material is wider, stronger practicability; is suitable for mass production.