利用正交试验筛选出最优基础涂料（EP）配方，通过在基础涂料中添加分散剂和石墨烯（GE-EP）、偶联剂改性石墨烯（GK-EP）、或改性石墨烯以及分散剂（GDK-EP），制备了三种石墨烯/环氧复合涂料。测试了纯环氧涂层（EP）和三种石墨烯/环氧复合涂层的基础物理性能、耐盐雾性能和电化学性能，考察了石墨烯加入量和加入方式对环氧涂层防腐蚀性能的影响。结果表明：当在环氧涂层中添加分散剂，且偶联剂改性石墨烯质量分数为1.5%时，涂层的综合性能最好。此时，涂层的抗冲击性达到50 cm·kg，附着力为2级，硬度高于6 H，并且耐盐雾时间高达1 500 h，腐蚀电流密度低至2.039×10^-8 A/cm²。含1.5%石墨烯的GDK-EP涂层的各项性能都远高于EP涂层的。

Orthogonal test was used to select the optimal base coating (EP) formula, and three kinds of graphene/epoxy composite coating were prepared by adding dispersant and graphene (GE-EP), coupling agent modified graphene (GK-EP), or modified graphene and dispersant (GDK-EP) in the base coating. The basic physical properties, salt spray resistance and electrochemical properties of pure epoxy coating (EP) and three graphene/epoxy composite coatings were tested, and the effects of the amount and adding method of graphene on the corrosion resistance of epoxy coatings were investigated. The results show that when the dispersant was added to the epoxy coating and the mass fraction of graphene modified by the coupling agent was 1.5%, the comprehensive performance of the coating was the best. At this time, impact resistance of the coating reached 50 cm·kg, adhesion of the coating was level 2, hardness was higher than 6 H, salt spray resistance time was up to 1,500 h, and the corrosion current density was as low as 2.039×10^-8 A/cm². The performance of GDK-EP coating with 1.5% graphene was much higher than that of EP coating.