腐蚀
材料科学
等离子体电解氧化
涂层
合金
氧化物
冶金
化学工程
金属
电解质
离子键合
表面改性
复合材料
化学
离子
电极
有机化学
物理化学
工程类
作者
Yupeng Zhang,Yong Li,You Lv,Xinxin Zhang,Zehua Dong,Lei Yang,Erlin Zhang
标识
DOI:10.1016/j.electacta.2022.140089
摘要
The application of biodegradable Mg alloys as implanted devices has been hindered by their low corrosion resistance and potential risk associated with microbial infection. In the present work, a rolled Mg-Ag alloy was studied, which was subjected to plasma electrolytic oxidation (PEO) to achieve a favoured balance between corrosion resistance and antimicrobial capability. The Ag distribution, corrosion resistance and Ag ionic release behaviour have been examined in details. It is revealed that PEO process leads to both incorporated Ag+ and Ag-rich nanoparticles in forms of metallic Ag and Ag oxide across the coating. In addition, a nano-sized Ag-enriched layer also exists at the substrate/coating interface. The microstructural modification associated with PEO process results in an increased corrosion resistance and a sustained Ag ionic release, indicating that it is a promising surface modification technique for antibacterial Mg-Ag alloy.
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