▎ 摘　　要

Graphene oxide is an ideal nanofiller for epoxy resins because of its excellent mechanical properties, high thermal resistance, and abundant oxygen-containing functional groups. However, the poor dispersion of graphene oxide in epoxy resins restricts its application in corrosive environments. In this study, epoxy coating was prepared by incorporating triethanolamine (TEA)-modified graphene oxide (TEA-GO-EP). TEA acted as a modification agent for graphene oxide to improve its dispersion in epoxy and corrosion inhibitor for the underlying copper substrate. The long-term potentiodynamic polarization and electrochemical impedance spectroscopy results demonstrated the improved anti-corrosion performance of the TEA-GO-EP coatings in 3.5 wt.% NaCl aqueous solution, compared with the coatings without TEA. Moreover, the anti-corrosion mechanism was discussed in detail. The findings reported in this paper have important implications for developing new types of eco-friendly epoxy-based coatings.