▎ 摘　　要

NOVELTY - Black metal surface nano-graphene composite layer comprises 0.01-0.05 wt.% graphene, 0.02-0.1 wt.% mixed rare earth, 5-30 wt.% zinc, 0.7-3.2 wt.% silicon, 0.07-0.08 wt.% manganese, 0.001-0.03 wt.% boron, 0.001-0.03 wt.% magnesium, 0.001-0.03 wt.% vanadium, 0.001-0.03 wt.% titanium, 0.001-0.03 wt.% zirconium and aluminum (remaining amount). The nano-graphene composite layer is a composite layer with a thickness of 0.1-0.4 mm. USE - Black metal surface nano-graphene composite layer. ADVANTAGE - The composite layer has high strength, wear resistance, corrosion resistance and high temperature resistance, and can withstand 800°C high temperature erosion for a long time, 2500 hours of salt spray, weak, medium acid, alkali corrosion and other multi-functional advantages. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation method of black metal surface nano-graphene composite layer.