▎ 摘　　要

NOVELTY - Boron nitride/graphene composite material comprises graphene and boron nitride. The graphene is grown on the surface of the boron nitride in situ. The mass percentage of graphene is 2.5-3 wt.%, and balance is boron nitride. USE - Boron nitride/graphene composite material is used in metal equipment and for applying surface protective coating composition to surface of metal device and curing (all claimed). ADVANTAGE - The boron nitride/graphene composite material has low cost, characteristics of high thermal conductivity and infrared emissivity radiation and improves the heat dissipation of the coating composition while taking into account the functions of corrosion protection and decoration. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) a method for preparing boron nitride/graphene composite material, which involves performing combustion synthesis reaction, mixing boron nitride powder and magnesium powder to obtain reactant, combusting reactants in oxidizing atmosphere under vacuum to completeness, purifying product and drying to obtain boron nitride/graphene composite material; and (2) a surface protective coating composition, which comprises first component comprises boron nitride/graphene composite material, binder, auxiliary agent, solvent and second component comprises curing agent.