In this study, (3-aminopropyl)-triethoxysilane–modified graphene oxide (GO) composite thin films were synthesized on magnesium alloy AZ31 substrate. The structure, composition, and morphology of silane-GO films were analyzed. Electrochemical measurements and immersion tests showed that silane-GO coatings provide effective protection for magnesium alloy substrates, owing to the good barrier property of the layered GO, and decrease the defects on the GO film surface due to the silane modification. In addition, the corrosion product between the outer silane-GO film and Mg alloy substrate also improved the corrosion resistance of the Mg alloy. Thus, silane-GO composite thin films provide an effective approach for protecting the lightweight metal substrate.

在这项研究中，(3-氨基丙基)-三乙氧基硅烷改性的氧化石墨烯 (GO) 复合薄膜在镁合金 AZ31 基板上合成。分析了硅烷-GO薄膜的结构、组成和形貌。电化学测量和浸没试验表明，硅烷-GO涂层由于层状GO的良好阻隔性，为镁合金基材提供了有效的保护，并减少了由于硅烷改性而导致的GO膜表面缺陷。此外，外层硅烷-GO膜与镁合金基体之间的腐蚀产物也提高了镁合金的耐腐蚀性能。因此，硅烷-GO复合薄膜为保护轻质金属基材提供了一种有效的方法。