▎ 摘　　要

The research involved in selecting graphene as the reinforcing phase and thereby depositing graphene-Ni-P composite coatings with different graphene content on surface of AlCu4Mg1 aluminum alloy as plating. The influence of graphene concentration on the hardness, thickness, surface morphology, structure and composition of the composite coatings was tested and analyzed by mic hardness tester, digital eddy current thickness gauge, electrochemical workstation, scanning electron microscopy and X-ray diffraction, respectively. Results showed that when the graphene concentration in the electrolyte was 0.25 g/L, the hardness of the coatings was 590.3 HV, which was about 1.22 times higher than that of Ni-P coatings. It also showed that the addition of graphene of 0.25 g/L gave the coating the maximum thickness of 10 mu m. The corrosion potential was the highest (- 669.8 mV) when the graphene concentration was 0.25 g/L, which was 93.88 mV higher than the Ni-P coating. Addition of graphene refined the grain of the coating, and the grain of the coating was compact and uniform.