▎ 摘　　要

Heavy-duty anticorrosive applications usually require coatings to possess self-healing ability and high protection efficiency. In this paper, we propose a self-healing anticorrosion coating based on graphene (GP)-reinforced brominated butyl rubber (BIIR) ionomer. An ionomer with a reversible ionic network is fabricated by cross -linking BIIR with tert-butylpyridine and then compounded with GP nanosheets. The pi-cationic interactions be-tween GP nanosheets and pyridyl groups result in high interfacial contact. The interfacial contact promotes the dispersion of GP nanosheets in the polymer matrix, increasing the difficulty of corrosive chemical diffusion. Such material design enables the protection efficiency of the coating for a steel substrate to exceed 99 % in strong acid, strong alkali or high salt corrosive solutions. Furthermore, the coating exhibits high self-healing effectiveness in corrosive solutions. The recovered protection effectiveness is as high as 97.7 % after 24 h of self-healing. The coatings' remarkable anticorrosive and self-healing properties allow them to improve the service life of metallic equipment and components under harsh working situations.