▎ 摘　　要

In order to obtain a metal coating with excellent corrosion resistance by a simple preparation process applied to navy vessel corrosion protection, Ni-graphene composite coatings were grown on 45# steel substrates by electro-brush plating. Scanning electron microscope (SEM), energy dispersive spectrometer (EDS), atomic electron microscopy (AFM) and Raman spectroscopy were employed to characterize the morphology of graphene and the coatings. The corrosion resistance of Ni-graphene composite coatings was studied by electrochemical test and immersion experiments. Results show that the graphene layers enter the Ni-graphene composite coating; compared with Ni coating, Ni-graphene composite coating exhibits better quality. In electrochemical test and immersion experiments, we find that in the comparison between Ni-GE composite coating and Ni plating, the corrosion potential of the former moves positively by 70 mV, the corrosion current density of the former is only 0.34 times of that of the latter, and the charge transfer resistance of the former is 3.1 times of that of the latter. After immersion for 168 h in 3.5% NaCl solution, the mass loss of Ni-graphene composite coating is 0.47 times of Ni plating layer, indicating that the corrosion resistance of Ni- graphene composite coating is obviously enhanced.