▎ 摘　　要

NOVELTY - Preparing graphene coating comprises (a) adding graphene and metal salt to an organic solvent, and ultrasonically processing to obtain a graphene dispersion liquid, (b) adding the graphene dispersant as an electrolyte to an electrophoretic deposition groove, and (c) forming graphene coating on the surface of the cathode. USE - The graphene coating is used in field of metal material surface anti-corrosion, composite material, solar battery, coating, and electro-deposition technology field. ADVANTAGE - The method: is easy to obtain and non-toxic; has simple and controllable operation, and no toxicity; provides graphene coating with high bonding force on the surface of the metal material; and improves the corrosion resistance of metal substrate.