Degradation mechanism of micro-arc oxidation coatings on biodegradable Mg-Ca alloys: The influence of porosity

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• 作者：Lan-Yue Cui^a ; ^b ; Rong-Chang Zeng^a ; ^b ; ^{rczeng@foxmail.com} ; Shao-Kang Guan^c ; Wei-Chen Qi^a ; ^b ; Fen Zhang^a ; ^b ; Shuo-Qi Li^a ; ^b ; En-Hou Han^d
• 关键词：Metals and alloys ; Thin films ; Corrosion ; Oxidation ; SEM
• 刊名：Journal of Alloys and Compounds
• 出版年：2017
• 出版时间：25 February 2017
• 年：2017
• 卷：695
• 期：Complete
• 页码：2464-2476
• 全文大小：3491 K
• 卷排序：695

文摘

The change in open circuit potentials leads to alternating degradation mechanisms. Degradation mechanisms include chemical and electrochemical corrosion. Chemical corrosion of the coatings may be related to the non-through pores. Electrochemical corrosion is due to through-pores and micro-cracks of the coating. Through-pores in the microarc oxidation coating designate a galvanic effect.