Abstract This study reports a facile method to prepare silica-coated graphene oxide nanoflakes (SiO2–GO). Results of X-ray diffraction analysis, Raman spectroscopy, Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy and atomic force microscopy reveal that silica was successfully coated on the GO flakes. The effect of SiO2–GO nanosheets on the corrosion protection and barrier performance of the epoxy coating was investigated in this work. Results indicate that the mechanical properties of all coatings added with GO and SiO2–GO were significantly improved. Furthermore, electrochemical impedance and Tafer polarisation curves showed that added 0.5 wt% SiO2–GO nanoflakes into zinc-rich epoxy coating could greatly improve the anti-corrosion performance of the sample, and the corrosion protection efficiency increased from 67.01 to 99.58%.

中文翻译：

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使用纳米二氧化硅/氧化石墨烯混合物增强富锌环氧涂层的阻隔和防腐性能

摘要 本研究报告了一种制备二氧化硅涂层氧化石墨烯纳米薄片 (SiO2-GO) 的简便方法。X 射线衍射分析、拉曼光谱、傅里叶变换红外光谱、扫描电子显微镜、透射电子显微镜和原子力显微镜的结果表明，二氧化硅成功地涂覆在 GO 薄片上。在这项工作中研究了 SiO2-GO 纳米片对环氧树脂涂层的腐蚀保护和阻隔性能的影响。结果表明，所有添加了 GO 和 SiO2-GO 的涂层的机械性能都得到了显着改善。此外，电化学阻抗和 Tafer 极化曲线表明，在富锌环氧树脂涂层中加入 0.5 wt% SiO2-GO 纳米薄片可以大大提高样品的防腐性能，