Improved corrosion resistance on biodegradable magnesium by zinc and aluminum ion implantation

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• 作者：Ruizhen Xu ; Xiongbo Yang ; Kai Wong Suen ; Guosong Wu ; Penghui Li ; Paul K. Chu ; ^{paul.chu@cityu.edu.hk}
• 关键词：Biomaterials ; Magnesium ; Ion implantation ; Corrosion
• 刊名：Applied Surface Science
• 出版年：2012
• 出版时间：15 December, 2012
• 年：2012
• 卷：263
• 期：Complete
• 页码：608-612
• 全文大小：645 K

文摘

Magnesium and its alloys have promising applications as biodegradable materials, and plasma ion implantation can enhance the corrosion resistance by modifying the surface composition. In this study, suitable amounts of zinc and aluminum are plasma-implanted into pure magnesium. The surface composition, phases, and chemical states are determined, and electrochemical tests and electrochemical impedance spectroscopy (EIS) are conducted to investigate the surface corrosion behavior and elucidate the mechanism. The corrosion resistance enhancement after ion implantation is believed to stem from the more compact oxide film composed of magnesium oxide and aluminum oxide as well as the appearance of the ¦Â-Mg₁₇Al₁₂ phase.