▎ 摘　　要

NOVELTY - Preparation of corrosion-resistant composite coating involves dispersing graphene oxide in high boiling organic solvent, adding non-ionic surfactant to solvent, reacting mixture to obtain dispersion liquid of graphene organic solvent, adding dianhydride monomer and fluorinated diamine monomer to dispersion liquid, carrying out in-situ polymerization reaction of mixture for 12-48 hours to obtain graphene-containing polyamic acid slurry, coating prepared slurry on metal substrate by spin coating process and carrying out thermal imidization of coated metal substrate. USE - Preparation of corrosion-resistant composite coating (claimed). ADVANTAGE - The method provides composite coating with excellent high-temperature performance and optical transparency. DETAILED DESCRIPTION - Preparation of corrosion-resistant composite coating involves (a) dispersing graphene oxide in high boiling organic solvent by solvent displacement method, adding non-ionic surfactant to solvent, reacting mixture at 160-200 degrees C for 12-48 hours to obtained dispersion liquid of graphene organic solvent, (b) adding dianhydride monomer and fluorinated diamine monomer to dispersion liquid of graphene organic solvent, carrying out in-situ polymerization reaction of mixture for 12-48 hours to obtain graphene-containing polyamic acid slurry, and (c) coating prepared slurry on metal substrate by spin coating process and carrying out thermal imidization of coated metal substrate at 160-480 degrees C for 5-60 minutes.