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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Exploring the corrosion behavior of Mn-implanted biomedical Mg
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Exploring the corrosion behavior of Mn-implanted biomedical Mg

机译：探索Mn植入生物医学MG的腐蚀行为

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摘要

Many surface modification technologies have been developed on biomedical magnesium (Mg) and its alloys to expand potential clinical applications. In this study, the bio-safe manganese (Mn) element was implanted into the biomedical Mg surface by a metal vapor vacuum arc (MEVVA) technique. In the Mn-implanted layer, Mn existed in the form of both metallic and oxidized states. Besides, Mn ion implantation changed the corrosion behavior of biomedical Mg in Hank's solution. At the initial stage of immersion, the corrosion rate was accelerated owing to the galvanic couple between metallic Mn and Mg, and micro-scale galvanic corrosion was uniformly distributed on surfaces. With the immersion time prolonging, Mn-implanted Mg displayed enhanced anti-corrosive property, presenting as a change from corrosion prone to corrosion resistance. On the one hand, the anti-corrosive and uniform Ca, P-containing products were formed on the corroded surface based on uniformly-distributed micro-scale pitting corrosion. On the other hand, the metallic Mn tended to be oxidized to stable Mn oxide so that galvanic corrosion was retarded. This research attempts to explore the effect of Mn ion implantation on the corrosion behavior of biomedical Mg, and offers new insight into novel surface modifications of biomedical Mg devices for long-time implantation.
机译：为了扩大潜在的临床应用，已经在生物医学镁及其合金上开发了许多表面改性技术。本研究采用金属蒸气真空电弧（MEVVA）技术将生物安全锰（Mn）元素注入生物医学镁表面。在Mn注入层中，Mn以金属态和氧化态的形式存在。此外，锰离子注入改变了医用镁在汉克溶液中的腐蚀行为。在浸泡初期，金属锰和镁之间的电偶作用加速了腐蚀速率，微尺度电偶腐蚀均匀分布在表面。随着浸泡时间的延长，锰离子注入镁的耐蚀性增强，表现为从易腐蚀到耐腐蚀的转变。一方面，在均匀分布的微尺度点蚀基础上，腐蚀表面形成了耐蚀、均匀的含钙、磷产物。另一方面，金属锰倾向于被氧化成稳定的锰氧化物，从而延缓电偶腐蚀。本研究试图探索锰离子注入对生物医学镁腐蚀行为的影响，并为长期注入生物医学镁器件的新型表面改性提供新的见解。

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