Ce与固溶处理对Mg-9Al-1Zn-2Ca合金组织和耐腐蚀性能的影响

刘俊茹; 贾磊; 张秋成

doi:10.15980/j.tzzz.2022.11.022

研究·合金性能 | 浏览量 : 0 下载量: 34 CSCD: 0

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Ce与固溶处理对Mg-9Al-1Zn-2Ca合金组织和耐腐蚀性能的影响
Effects of Ce and Solution Treatment on Microstructure and Corrosion Resistance of Mg-9Al-1Zn-2Ca Alloy
2022年42卷第11期页码：1424-1428
纸质出版日期： 2022 ，
DOI： 10.15980/j.tzzz.2022.11.022

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刘俊茹, 贾磊, 张秋成. Ce与固溶处理对Mg-9Al-1Zn-2Ca合金组织和耐腐蚀性能的影响[J]. 特种铸造及有色合金, 2022,42(11):1424-1428.

Liu Junru, Jia Lei, Zhang Qiucheng. Effects of Ce and Solution Treatment on Microstructure and Corrosion Resistance of Mg-9Al-1Zn-2Ca Alloy[J]. Special Casting & Nonferrous Alloys, 2022,42(11):1424-1428.
刘俊茹, 贾磊, 张秋成. Ce与固溶处理对Mg-9Al-1Zn-2Ca合金组织和耐腐蚀性能的影响[J]. 特种铸造及有色合金, 2022,42(11):1424-1428. DOI： 10.15980/j.tzzz.2022.11.022.

Liu Junru, Jia Lei, Zhang Qiucheng. Effects of Ce and Solution Treatment on Microstructure and Corrosion Resistance of Mg-9Al-1Zn-2Ca Alloy[J]. Special Casting & Nonferrous Alloys, 2022,42(11):1424-1428. DOI： 10.15980/j.tzzz.2022.11.022.

摘要

添加微量稀土元素Ce及固溶处理，通过扫描电镜(SEM)、能谱仪(EDS)、X射线衍射仪(XRD)、光学显微镜(OM)、浸泡试验和电化学测试等研究了Mg-9Al-1Zn-2Ca合金的显微组织和腐蚀性能。结果表明，添加Ce使晶粒尺寸变小、组织均匀性提高；固溶处理后第二相体积分数降低，合金元素Al、Ce溶入基体使基体电位升高等因素减弱了微电偶腐蚀，有效提高了材料的耐腐蚀性能。其中固溶处理Mg-9Al-1Zn-2Ca-0.5Ce合金试样具有较好的耐腐蚀性能。

Abstract

Microstructures and corrosion resistance of the Mg-9 Al-1 Zn-2 Ca alloy with trace rare earth Ce and solution treatment were investigated by scanning electron microscopy（SEM）

energy dispersive spectroscopy（EDS）

X-ray diffraction（XRD）

optical microscopy（OM）

immersion test and electrochemical test. The results reveal that the addition of Ce can reduce the grain size and improve the uniformity of microstructure. The volume fraction of the second phase in the alloy is decreased

and factors such as Al and Ce melting into the matrix can increase the potential of the matrix

weakening the microgalvanic corrosion and effectively improving the corrosion resistance of the alloy after solution treatment. The solution treated Mg-9 Al-1 Zn-2 Ca-0.5 Ce alloy sample exhibits excellent corrosion resistance.