▎ 摘　　要

In this paper. ceramic coatings were prepared on the surface of 7050 high strength aluminum alloy using a micro-arc oxidation process in a silicate electrolyte combined with the rare earth element cerium or graphene. To analyze the surface morphology, roughness, phase composition, and corrosion resistance, scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectrometry, and electrochemical measurements were used, respectively. It was shown that the micropore size of the composite coatings, which mainly consisted of alpha-Al2O3 and gamma-Al2O3, decreases and the density improved with the simultaneous addition of 4 g . L-1 of CeO2 and 10 g . L-1 of graphene to the electrolyte. In addition, with the addition of CeO2, and graphene, the roughness was the lowest and the corrosion resistance was significantly improved.