▎ 摘　　要

NOVELTY - Cationic dopamine functionalized graphene aqueous anti-corrosive coating comprises cationic dopamine functionalized graphene material and aqueous resin emulsion, where the cationic dopamine functionalized graphene material is uniformly dispersed in the aqueous resin emulsion. USE - The dopamine functionalized graphene aqueous anti-corrosive coating or anti-corrosion coating is useful in corrosion field (claimed) for mainstream automotive and ship coating. ADVANTAGE - The dopamine functionalized graphene aqueous anti-corrosive coating uses a simple and convenient electrophoretic deposition technique, is economical, less-polluting, and has wide application prospects. The aqueous anti-corrosive coating is widely used and cost efficient and anti-corrosion measures, is green and environmentally friendly (meets the requirements of low volatile organic compound emissions), has ideal adhesion, and improves impermeability of organic coating to enhance corrosion resistance. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) a method for preparing cationic dopamine functional graphene aqueous anti-corrosion coating comprises performing modification treatment to the graphene oxide by dopamine, obtaining the graphene material of dopamine functionalization, ionizing the graphene material functionalized with dopamine to obtain the graphene material functionalized by cationic dopamine, uniformly dispersing the cationic dopamine functionalized graphene material in the aqueous resin emulsion, and obtaining cationic dopamine functional graphene aqueous anti-corrosion coating; and (2) a method for preparing anti-corrosion coating comprising constructing an electrochemical reaction system making at least making the substrate as the cathode, the anode and the electrolyte, where the electrolyte uses the cationic dopamine functional graphene aqueous anti-corrosion coating, using electrophoretic deposition technology, electrifying to the electrochemical reaction system, depositing and forming a dense passivation layer on the surface of the substrate, then curing to obtain the anti-corrosive coating