▎ 摘　　要

In order to improve the dispersion of graphene in epoxy resin, the preparation of melamine modified graphene oxide (M-rGO) is reported. The pi-pi interaction between melamine and graphene oxide (GO) sheet is confirmed via ultraviolet-visible spectroscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy analysis, which endows M-rGO with well dispersion. The dispersion concentration of M-rGO in dimethyl sulfoxide is up to 9 mg/ml, and the stability of which keeps more than 18 months. The anticorrosion performance of M-rGO/epoxy composite coatings was analyzed through electrochemical measurements and salt spray tests, these results indicate that M-rGO has a good barrier effect on corrosive medium and even can replace zinc powder in zinc-rich epoxy. In addition, the reinforced mechanical strength of M-rGO/epoxy composite coatings is proved via mechanical strength tests.