Abstract Seawater is regarded as the most corrosive natural environment, and can lead to serious corrosion, friction, and their collaborative effects. In this work, composite films were fabricated by combining a graphene oxide (GO)-modified hybrid sol-gel (sol-gel/GO) layer and plasma electrolytic oxidation (PEO) layer for corrosion protection. XRD, TFIR, XPS, and Raman analyses were used to prove the covalent functionalisation between the GO and silane coupling agents. The results showed that the micropores in the PEO film were filled with the GO/sol-gel layer. Electrochemical tests indicated that the addition of GO at different concentrations could significantly improve the corrosion performance of the substrates through the good barrier property of the GO nanosheets. Moreover, the enhanced wear resistance of the GO/sol-gel layer during tribocorrosion tests could be attributed to the solid lubrication property of the GO nanosheets.

中文翻译：

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等离子体电解氧化层和氧化石墨烯填充的溶胶-凝胶层复合涂层对 Ti6Al4V 的腐蚀保护

摘要 海水被认为是最具腐蚀性的自然环境，会导致严重的腐蚀、摩擦及其协同效应。在这项工作中，通过将氧化石墨烯 (GO) 改性的混合溶胶-凝胶 (溶胶-凝胶 / GO) 层和等离子体电解氧化 (PEO) 层相结合来制备复合膜，以防止腐蚀。XRD、TFIR、XPS 和拉曼分析用于证明 GO 和硅烷偶联剂之间的共价官能化。结果表明，PEO薄膜中的微孔被GO/溶胶-凝胶层填充。电化学测试表明，通过GO纳米片良好的阻隔性，添加不同浓度的GO可以显着提高基材的腐蚀性能。而且，