目的 通过添加改性氧化石墨烯，提高环氧富锌涂层的防腐性能。方法 采用对氨基苯磺酸重氮盐、聚乙烯吡咯烷酮(PVP)以及磺化碳纳米管(SMWCNT)作为改性剂，分别对氧化石墨烯(GO)进行改性处理，并制备改性氧化石墨烯基环氧富锌涂层。采用X-射线衍射谱、傅里叶红外转换光谱和扫描电镜，分析了GO改性前后的结构变化和在涂层中的分散效果。选择改性效果最佳的氧化石墨烯基环氧富锌涂层，并通过电化学交流阻抗谱、盐雾试验、扫描电镜和开路电位等手段分析涂层在腐蚀环境中的腐蚀行为，测试其耐腐蚀性能。结果 三种改性GO被成功制备，片层分散效果均得到提升，其中经SMWCNT改性后，GO的片层间距由0.83 nm变为0.88 nm，且在涂层中的分散效果最佳，形成的涂层致密无孔隙。加入改性氧化石墨烯后，环氧富锌涂层的阴极保护时间得到延长，物理屏蔽作用得以增强。在盐雾试验1680 h后，涂层表面完整无起泡现象，金属基底腐蚀坑的最大坑深由42.31 μm降至16.09 μm。涂层在电解质溶液的浸泡过程中均表现出比纯环氧富锌涂层更高的阻抗模量，且在浸泡72 d后，涂层的低频阻抗值由10³ Ω.cm²提升到10⁴ Ω.cm²，耐蚀性能优于纯环氧富锌涂层。结论 环氧富锌涂层中添加改性石墨烯后，防腐性能提升了62.4%。

Aiming to improve the anti-corrosion performance of epoxy zinc-rich coating by adding modified graphene oxide, this paper modifies the graphene oxide (GO) by p-aminobenzenesulfonic acid diazo salt, polyvinylpyrrolidone (PVP) and sulfonated carbon nanotube (SMWCNT), prepares the modified graphene oxide-based epoxy zinc-rich coating, analyzes the structure change and the dispersion effect in the coating of modified GO by X-ray diffraction spectrum, Fourier transform infrared spectrum and scanning electron microscope, and discusses the corrosion behavior of the coating in corrosion environment and tests its corrosion resistance by electrochemical impedance spectroscopy, salt spray test, scanning electron microscope and open-circuit potential for graphene oxide epoxy zinc-rich coating with the best modification effect. The results showed that three kinds of modified GO were successfully prepared, and the dispersion effects were all improved. After SMWCNT modification, the lamellar spacing of GO changed from 0.83 nm to 0.88 nm, the dispersion effect was the best in the coating, and the coating formed was dense without pores. With the addition of modified graphene oxide, the cathodic protection time of zinc-rich epoxy coating was prolonged and the physical shielding effect was enhanced. After 1680 hours of salt spray test, there was no blistering on the surface of the coating. The maximum depth of corrosion pits on metal substrate is reduced from 42.31 μm to 16.09 μm. In the process of immersion in electrolyte solution, the impedance modulus of the coating is higher than that of the pure epoxy zinc-rich coating, and after 72 days, the low-frequency impedance of the coating increases from 103 Ω.cm2 to 104 Ω.cm2, and the corrosion resistance is much stronger than that of the pure epoxy zinc-rich coating. It can be concluded that with the addition of modified graphene oxide, the anti-corrosion performance is improved by 62.4%.