Abstract An electrically conductive coating was prepared on micro-arc oxidized (MAO) Mg alloy AZ31 via antimony tin oxide (ATO) particles doping in methyltrimethoxysilane (MTMS) coating. A sandwich structure was observed as the ATO particles agglomerated at the top and bottom layers in the MTMS coating via field-emission scanning electron microscopy (FE-SEM). Electrochemical and hydrogen evolution tests revealed high corrosion resistance of the composite coating. Although the ATO-doped MAO/MTMS coating showed a low electrical conductivity, a conductive path was formed on the coating surface layer, enhancing the transfer of static charges. The formation and corrosion mechanisms of the composite coatings are proposed.

中文翻译：

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镁合金AZ31上纳米ATO掺杂MAO/甲基三甲氧基硅烷复合涂层的耐腐蚀性和导电性

摘要 通过在甲基三甲氧基硅烷（MTMS）涂层中掺杂氧化锑锡（ATO）颗粒，在微弧氧化（MAO）镁合金AZ31上制备了导电涂层。通过场发射扫描电子显微镜（FE-SEM）观察到 ATO 颗粒聚集在 MTMS 涂层的顶层和底层时形成夹心结构。电化学和析氢测试表明复合涂层具有高耐腐蚀性。尽管 ATO 掺杂的 MAO/MTMS 涂层显示出低电导率，但在涂层表面层上形成了导电路径，增强了静电荷的转移。提出了复合涂层的形成和腐蚀机理。