▎ 摘　　要

NOVELTY - An aqueous epoxy-based anti-corrosion coating comprises 0.1-2 parts mass composite functionalized modified graphene oxide (I), 80-100 parts mass epoxy resin, 20-100 parts mass self-emulsifying water-based epoxy curing agent, 100-350 parts mass water, 0.5-10 parts mass silane coupling agent, 0.5-3 parts mass dispersant, 0.5-3 parts mass accelerator, 0.5-3 parts mass defoamer and 0.5-3 parts mass leveling agent. USE - Aqueous epoxy-based anti-corrosion coating used for surface of metal component (claimed). ADVANTAGE - The aqueous epoxy-based anti-corrosion coating has excellent acid and alkali resistance, water resistance, salt spray resistance and hydrophobicity after film formation. DETAILED DESCRIPTION - An aqueous epoxy-based anti-corrosion coating comprises 0.1-2 parts mass composite functionalized modified graphene oxide, 80-100 parts mass epoxy resin, 20-100 parts mass self-emulsifying water-based epoxy curing agent, 100-350 parts mass water, 0.5-10 parts mass silane coupling agent, 0.5-3 parts mass dispersant, 0.5-3 parts mass accelerator, 0.5-3 parts mass defoamer and 0.5-3 parts mass leveling agent. The composite functionalized modified graphene oxide is of formula (I). R1 = group chosen from groups of formulae (a1)-(a4); and R2 = group of formula (a5). An INDEPENDENT CLAIM is included for preparation of aqueous epoxy-based anti-corrosion coating, which involves (1) dispersing graphene oxide in water by ultrasonically treating to obtain graphene oxide suspension, then adding amino acid for reaction, and obtaining amino acid modified graphene oxide after purification, (2) dispersing titanium dioxide in an aqueous ethanol solution by ultrasonically treating to obtain a titanium dioxide suspension, then adding the silane coupling agent to react, and purifying to obtain a silane coupling agent-modified titanium dioxide, (3) dispersing the amino acid-modified graphene oxide obtained in the step (1) and the silane coupling agent-modified titanium dioxide obtained in the step (2) in water by ultrasonically treating, then reacting, and drying to obtain a composite functional modification graphene oxide, (4) reacting the epoxy resin and polyetheramine in a solvent, and after removing the solvent, obtaining a polyether product with an amino group at the end, adding an acid compound for acid treatment, and then adding water to obtain self-emulsifying waterborne epoxy curing agent, and (5) mixing the composite functionalized modified graphene oxide, epoxy resin and self-emulsifying water-based epoxy curing agent evenly, then adding water, preparing the epoxy resin emulsion by the reverse inversion method, and adding the dispersant, the accelerator, the defoaming agent and the leveling agent, uniformly mixing the mixture.