Effect of solution treatment on microstructure and corrosion resistance of biodegradable Mg-2.0Zn-0.5Zr-3.0Gd magnesium alloy

被引：0
|
作者：
Yao H. [1 ,2 ]
Wen J.-B. [1 ,2 ]
Xiong Y. [1 ,2 ]
He J.-G. [1 ,2 ]
Liu Y. [1 ]
Li X.-Y. [1 ]
机构：
[1] School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang
[2] Collaborative Innovation Center of Nonferrous Metals, Luoyang
来源：
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2019年 / 29卷 / 03期
关键词：
Biocorrosion property; Electrochemical property; Magnesium alloy; Microstructure;
D O I：
10.19476/j.ysxb.1004.0609.2019.03.09
中图分类号：
学科分类号：
摘要：
The effects of temperatures on microstructure of Mg-2.0Zn-0.5Zr-3.0Gd magnesium alloy were investigated by metallographic microscope (OM), scanning electronic microscope (SEM), transmission electron microscope (TEM). The corrosion properties of magnesium alloy were studied by mass loss, hydrogen evolution and electrochemical tests in the simulated body fluid (SBF). The results show that the second phase (Mg, Zn)3Gd is network distributed in the alloy matrix for the as-cast alloy. The grain size of alloy gradually increases with the increase of solid solution temperature at a temperature range of 460-500℃. There is no dissolved (Mg, Zn)3Gd phase present as a strip and particle form in alloy matrix when the temperature is 480℃. While partially granular phase has coherent interface relationship with α-Mg matrix. The corrosion rate for the solid solution alloy decreases with the increase of the solid solution temperature, and then increases. The corrosion resistance of the alloy is better than that of the as-cast alloy when the solid solution temperature is 480℃. In the immersion test of 120 h, the corrosion rate of alloys gradually reaches a steady state value in the last 24 h. © 2019, Science Press. All right reserved.
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页码：498 / 507
页数：9
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