▎ 摘　　要

NOVELTY - The preparation method of composite coating involves weighing substrate and then washing, adding 15% diluted hydrochloric acid to the washed substrate and then mixing, washing the mixture using water, adding 3-aminopropyltriethoxysilane and graphene oxide dispersion liquid to the mixture and then reacting, adding surfactant, nickel plating solution and water to the mixture and then stirring, washing using water, and drying. USE - The method is useful for preparation of composite coating. ADVANTAGE - The method enables preparation of composite coating with excellent wear resistance, water solubility, hardness, bonding strength and mechanical properties in environmentally-friendly manner.