Relationship between the corrosion behavior and the thermal characteristics and microstructure of Mg-0.5Ca-xZn alloys

被引：272
作者：
Bakhsheshi-Rad, H. R. [2 ]
Abdul-Kadir, M. R. [1 ]
Idris, M. H. [2 ]
Farahany, S. [2 ]
机构：
[1] Univ Teknol Malaysia, Fac Biomed Engn & Hlth Sci, Dept Biomech & Biomed Mat, Johor Baharu 81310, Johor, Malaysia
[2] Univ Teknol Malaysia, Fac Mech Engn, Dept Mat Engn, Johor Baharu 81310, Johor, Malaysia
来源：
CORROSION SCIENCE | 2012年 / 64卷
关键词：
Magnesium; Alloy; Polarization; Weight loss; SEM; AZ31 MG ALLOY; MAGNESIUM-ALLOY; BIO-CORROSION; CA ALLOYS; ELECTROCHEMICAL-BEHAVIOR; MECHANICAL-PROPERTIES; ZN; SOLIDIFICATION; ND;
D O I：
10.1016/j.corsci.2012.07.015
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Effects of secondary phases on corrosion behaviour of the Mg-0.5Ca-xZn alloys were investigated by polarization, immersion and hydrogen evolution tests. The Mg2Ca phase nucleated at 520 degrees C while, Ca2Mg6Zn3 and Mg51Zn20 phases were formed at 420 degrees C and 330 degrees C respectively. The corrosion resistance of Mg-0.5Ca alloy was enhanced with the addition of Zn up to 1%, while further addition reversed the effect. The Mg-0.5Ca-1Zn alloys with (alpha-Mg + Ca2Mg6Zn3 Mg2Ca) phase showed lower corrosion rate than the alloys with (alpha-Mg + Ca2Mg6Zn3) and (alpha-Mg + Ca2Mg6Zn3 + Mg51Ca20) phases. The amount of corrosion product, composed of Mg(OH)(2) and hydroxyapatite on the surface of the alloy, increased with increasing Zn content. (C) 2012 Elsevier Ltd. All rights reserved.
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收藏
页码：184 / 197
页数：14
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