Effect of Ca Micro-Alloying on the Microstructure and Anti-Corrosion Property of Mg0.5Zn0.2Ge Alloy
作者机构：School of Materials Science and Engineering and Henan Key Laboratory of Advanced Magnesium AlloysZhengzhou UniversityZhengzhou450001China Center of Advanced Analysis and Gene SequencingZhengzhou UniversityZhengzhou450001China Key Laboratory of Materials Processing and Mold TechnologyMinistry of EducationZhengzhou450002China
出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)
年 卷 期：2024年第37卷第7期
页 面：1147-1160页
核心收录：
学科分类：0806[工学-冶金工程] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）]
基 金：supported by the Natural Science Foundation of Henan Provincial(222300420309) the China Postdoctoral Science Foundation(2022M710132) the Henan Postdoctoral Foundation(202102006) the Startup Research Fund of Zhengzhou University(32340146)
主 题：Magnesium alloy Micro-alloying Calcium Corrosion resistance
摘 要：Magnesium and its alloys have attracting rising attention as one of biodegradable metallic ***,the rapid corrosion and severe localized corrosion still hinder their extensive applications in *** this study,micro-alloying of Ca(≤0.1 wt%)into Mg0.5Zn0.2Ge alloy developed in our previous work was explored to further enhance the corrosion resistance and alleviate the localized corrosion of the *** results reveal that the addition of Ca leads to the transformation of the cathodic Mg_(2)Ge phase in Mg0.5Zn0.2Ca alloy into anodic MgCaGe phase in Ca-containing alloys,thereby changing the galvanic couples in alloys during *** preferential dissolution of MgCaGe phase promotes the participation of Ca and Ge into the formation of corrosion products,resulting in the enrichment of Ca and Ge in the outmost of corrosion product layer,which stabilizes and passivates the corrosion product layer on Mg alloy ***,the enrichment of Zn at the corrosion interface seems to further hinder the corrosion of Mg *** of these factors confer a slower and more uniform corrosion on Mg0.5Zn0.2GexCa(x0.1 wt%)alloy,which provides favorable candidates for the further processing to gain suitable biodegradable Mg alloys.
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