▎ 摘　　要

NOVELTY - An epoxy resin composite coating solution is obtained by dispersing graphene and 0.1-10 %mass epoxy resin in solvent (a). USE - Epoxy resin composite coating solution is used in substrate surface cleaning process (claimed). ADVANTAGE - The surface coated with epoxy resin composite coating solution has excellent water resistance, friction resistance and wear resistance, and reduced friction coefficient. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) preparation of epoxy resin composite coating solution; and (2) usage method of epoxy resin composite coating solution in substrate surface cleaning process.