▎ 摘　　要

A novel organic-inorganic nanocomposite material of rare earth ions/pol(styrene-alt-maleic anhydride) ionic salt/reduced graphene oxide (Re3+/SMA-Is/rGO) was prepared successfully. Poly(styrene-alt-maleic anhydride) ionic salt functionalized reduced graphene oxide (SMA-Is/rGO) was processed with two methods of pi-pi conjugation and ionization; rare earth ions (Re3+ = La3+, Ce3+ Pr3+) was doped on the surface of rGO by physical mixing. SMA-Is reduced surface energy and enlarged the interlayer spacing between rGO nanosheets, ensuring that Re3+/SMA-Is/rGO could form a uniform dispersed phase in the organic coating. The anti-corrosion performance of the nanocomposite coating was measured by electrochemical techniques in corrosive medium, revealing that introducing the nanocomposite to epoxy matrix exhibited a significant decline of the increase of corrosion potential and corrosion current density. In all samples, La3+/SMA-Is/rGO had the highest anticorrosion performance, and the protection efficiency on mild steel was up to 98.97%.