Abstract Magnesium (Mg) AZ31 samples were chemically treated by a series of room temperature nanostructure cerium based conversion coatings containing Mn(NO 3 ) 2 ·4H 2 O, Co(NO 3 ) 2 ·6H 2 O, and polyvinyl alcohol (PVA). The microstructure and corrosion protection properties of different samples were studied by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), electrochemical impedance spectroscopy (EIS) and polarization test in 3.5 wt.% NaCl solution. Results demonstrated that the AZ31 Mg alloy sample treated by Ce-Mn-PVA showed the highest corrosion resistance. A denser Ce film with lower crack was precipitated on the sample treated by Ce-Mn-PVA conversion coating.

中文翻译：

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有机和无机复合缓蚀剂对 AZ31 镁合金铈基转化涂层性能的影响：形态学和腐蚀研究

摘要 镁 (Mg) AZ31 样品通过一系列含有 Mn(NO 3 ) 2 ·4H 2 O、Co(NO 3 ) 2 ·6H 2 O 和聚乙烯醇 (PVA) 的室温纳米结构铈基转化涂层进行化学处理。 . 通过扫描电子显微镜(SEM)、X射线光电子能谱(XPS)、电化学阻抗谱(EIS)和3.5 wt.% NaCl溶液中的极化试验研究了不同样品的微观结构和腐蚀防护性能。结果表明，经 Ce-Mn-PVA 处理的 AZ31 Mg 合金样品表现出最高的耐腐蚀性。经Ce-Mn-PVA转化涂层处理的样品上析出致密、裂纹较少的Ce膜。