首页|Effect of Mn Addition and Heat Treatment on the Corrosion Behaviour of Mg-Ag-Mn Alloy
Effect of Mn Addition and Heat Treatment on the Corrosion Behaviour of Mg-Ag-Mn Alloy
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The high corrosion sensitivity and the potential bio-toxicity of Mg-Ag alloys limit their wide applications for the produc-tion of implanted devices.In the present work,Mn is added into the Mg-Ag alloy to optimize its corrosion behaviour.The corrosion behaviour of Mg-Ag-Mn alloys is investigated with the underlying microstructural factors examined.The Mg-Ag alloy with 2 wt％Mn exhibits the highest corrosion resistance after post-casting heat treatment at 440 ℃.The addition of Mn results in α-Mn phase with the incorporation of Fe,which suppresses the cathodic activity of impurity Fe.Further,heat treatment of the cast alloys homogenizes the distribution of Ag and promotes the precipitation of α-Mn phase.The former removes Ag segregations as potential cathodes;the latter promotes a more uniform distribution of cathodes and,therefore,prevents localized corrosion.
You Lv、Yupeng Zhang、Xi Liu、Zehua Dong、Xiaorong Zhou、Xinxin Zhang
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Key Laboratory of Material Chemistry for Energy Conversion and Storage,Ministry of Education,Hubei Key Laboratory of Material Chemistry and Service Failure,School of Chemistry and Chemical Engineering,Huazhong University of Science and Technology,Wuhan 430074,China
Hubei Engineering Research Centre for Biomaterials and Medical Protective Materials,Huazhong University of Science and Technology,Wuhan 430074,China
Corrosion and Protection Centre,Department of Materials,The University of Manchester,Manchester M13 9PL,UK
National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaHubei Provincial Natural Science Foundation of China
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