Effect of Ga Content on Microstructure and Degradability of Al-Mg-Ga-Sn Alloys
Zhang Jianbin; Liu Junjun; Li Qinglin
2019-12
发表期刊RARE METAL MATERIALS AND ENGINEERING
ISSN1002-185X
卷号48期号:12页码:4039-4045
摘要Al-Mg-Ga-Sn alloys with different Ga contents were prepared by electric furnace melting. The microstructure morphology and composition were characterized by optical microscopy (OM), scanning electron microscopy (SEM) and X-ray diffractometry (XRD); the degradation rates were measured in pure water at 30, 40, 70 and 90 degrees C; and the electrochemical performance at room temperature was tested using the electrochemical workstation. The results reveal that in case that Mg+Sn is 10% (mass fraction), Al-Mg-Ga-Sn alloys with 0 wt%, 4 wt%, 8 wt%, 12 wt% and 16 wt% Ga, all contain Al matrix phase and Mg2Sn phase. Moreover, Ga5Mg2 phase appears with the increase in Ga content. The degradability of Al-Mg-Ga-Sn alloys primarily presents start-up with pitting corrosion in aluminum matrix phase, and acceleration with intergranular corrosion between Mg2Sn and Ga5Mg2 compound phases. The initial degradation temperatures of alloys with different Ga contents depend on the content of low melting point elements (Ga+Sn) solved in the aluminum matrix; the alloy with the same Ga content rapidly degrades with elevating temperature, and the degradation reaction kinetics follows Arrhenius equation. Electrochemical analysis at room temperature indicates that as Ga content increases in Al-Mg-Ga-Sn alloy, the corresponding corrosion potential negatively shifts to different extents, while the corrosion current gradually improves.
关键词aluminum alloy degradable microstructure corroded morphology
收录类别SCI ; SCIE
语种中文
WOS研究方向Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号WOS:000504920800037
出版者NORTHWEST INST NONFERROUS METAL RESEARCH
来源库WOS
引用统计
被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符https://ir.lut.edu.cn/handle/2XXMBERH/64300
专题省部共建有色金属先进加工与再利用国家重点实验室
材料科学与工程学院
通讯作者Zhang Jianbin
作者单位Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China
第一作者单位省部共建有色金属先进加工与再利用国家重点实验室
通讯作者单位省部共建有色金属先进加工与再利用国家重点实验室
第一作者的第一单位省部共建有色金属先进加工与再利用国家重点实验室
推荐引用方式
GB/T 7714
Zhang Jianbin,Liu Junjun,Li Qinglin. Effect of Ga Content on Microstructure and Degradability of Al-Mg-Ga-Sn Alloys[J]. RARE METAL MATERIALS AND ENGINEERING,2019,48(12):4039-4045.
APA Zhang Jianbin,Liu Junjun,&Li Qinglin.(2019).Effect of Ga Content on Microstructure and Degradability of Al-Mg-Ga-Sn Alloys.RARE METAL MATERIALS AND ENGINEERING,48(12),4039-4045.
MLA Zhang Jianbin,et al."Effect of Ga Content on Microstructure and Degradability of Al-Mg-Ga-Sn Alloys".RARE METAL MATERIALS AND ENGINEERING 48.12(2019):4039-4045.
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