▎ 摘　　要

In the study, polyaniline/reduced-graphene oxide (PANI-RGO) composites, fabricated by loading 2, 5, and 8wt% graphene oxide, was prepared by in-situ emulsion polymerization and reduction. They are characterized by Fourier transform infrared spectroscopy, X-ray diffraction, and scanning electron microscopy. Epoxy coatings adding PANI and PANI-RGO composites were coated on the surface of AA5083 Al alloy. The anticorrosion performance of the coatings is measured by electrochemical impedance spectroscopy and potentiodynamic polarization curve in 3.5wt% NaCl solution. The results demonstrate that the epoxy/PANI-RGO coating exhibits a better protection against AA5083 alloy corrosion compared with the epoxy/PANI coating. Enhancement of the passivation performance of PANI was obtained by the addition of RGO into epoxy/PANI coating system.