Micro-arc oxidization of a novel Mg-1Ca alloy in three alkaline KF electrolytes: Corrosion resistance and cytotoxicity

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• 作者：Z.J. Jia ; M. Li ; Q. Liu ; X.C. Xu ; Y. Cheng ; Y.F. Zheng ; T.F. Xi ; S.C. Wei
• 关键词：Mg&ndash ; 1Ca alloy ; Micro-arc oxidation (MAO) ; Electrolyte ; Corrosion resistance ; Cytotoxicity
• 刊名：Applied Surface Science
• 出版年：15 February, 2014
• 年：2014
• 卷：292
• 期：Complete
• 页码：1030-1039
• 全文大小：3410 K

文摘

A newly-developed Mg-1Ca (wt%) alloy was treated by micro-arc oxidization (MAO) in KF-silicate- (Si coating), KF-phosphate- (P coating) and KF-silicate-phosphate (SiP coating) electrolytes. The microstructure, composition and corrosion resistance of the resultant MAO coatings were investigated using scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and X-ray diffractometry (XRD). Electrochemical analysis and immersion test in Hanks鈥?solution and MTT assay for in-vitro toxicity against MG63 cells were subsequently carried out. Results showed that all the three MAO coatings contributed to the improvement of corrosion resistance and cytocompatibility of substrate; however, P coating outperformed the two others due to its specific microstructure and composition.