The corrosion characteristics and mechanism of directionally solidified Mg-3Zn-xCa alloys

doi:10.1016/j.jma.2022.02.010

IMR OpenIR

	The corrosion characteristics and mechanism of directionally solidified Mg-3Zn-xCa alloys
	Zhang, Yi 1,2; Feng, Xiaohui 1; Huang, Qiuyan 1; Li, Yingju 1; Hao, Xuehui 3; Wang, Changzheng 3; Yang, Yuansheng 1,2,3
通讯作者	Yang, Yuansheng(ysyang@imr.ac.cn)
	2023-10-01
发表期刊	JOURNAL OF MAGNESIUM AND ALLOYS
ISSN	2213-9567
卷号	11 期号:10 页码:3673-3687
摘要	An investigation into the corrosion characteristics and mechanism of directionally solidified (DSed) Mg-3Zn-xCa ( x = 0, 0.2, 0.5, 0.8 wt.%) alloys in 0.9 wt.% NaCl solution is presented. The DSed microstructure consists of columnar dendrites and eutectics distributed in the interdendritic region. The primary dendritic arm spacing (PDAS) and the volume fraction (fv ) of the secondary phases are under the significant impact of the content of Ca. The corrosion rates evaluated using electrochemical measurements and immersion tests are accelerated monotonously with the increase of Ca content in DSed alloys. The corrosion resistance of the DSed alloys is significantly affected by the corrosion products film (CPF) and the secondary phases. The corrosion products of DSed Mg-3Zn alloy contain Mg(OH)2 and ZnO. The existence of ZnO greatly enhances the corrosion resistance of DSed Mg-3Zn alloy. As for the DSed alloys containing Ca content, a relatively protective CPF without deep pits can form on the surface of DSed Mg-3Zn-0.2Ca specimen during the corrosion. The fv of the secondary phases dominates the corrosion rate of the DSed Mg-Zn-Ca alloys. The corrosion of DSed Mg-3Zn-xCa alloys initiates as a result of microgalvanic coupling between the cathodes of secondary phases and alpha-Mg matrix anode. Then, the corrosion gradually extends longitudinally with the breakdown of CPF. (c) 2022 Chongqing University. Publishing services provided by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ ) Peer review under responsibility of Chongqing University
关键词	Mg-Zn-Ca alloy Directional solidification Electrochemical characterization Corrosion mechanism.
资助者	Key Research and Devel- opment Plan of Shandong Province ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; DongGuan Innovative Research Team Program
DOI	10.1016/j.jma.2022.02.010
收录类别	SCI
语种	英语
资助项目	Key Research and Devel- opment Plan of Shandong Province[2019JZZY020329] ; National Key Research and Development Program of China[2017YFB0103904] ; National Natural Science Foundation of China[51701211] ; DongGuan Innovative Research Team Program[2020607134012]
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001124555200001
出版者	KEAI PUBLISHING LTD
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/182908
专题	中国科学院金属研究所
通讯作者	Yang, Yuansheng
作者单位	1.Chinese Acad Sci, Inst Met Res, Wenhua Rd 72, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Liaocheng Univ, Sch Mat Sci & Engn, Liaocheng 252000, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Yi,Feng, Xiaohui,Huang, Qiuyan,et al. The corrosion characteristics and mechanism of directionally solidified Mg-3Zn-xCa alloys[J]. JOURNAL OF MAGNESIUM AND ALLOYS,2023,11(10):3673-3687.
APA	Zhang, Yi.,Feng, Xiaohui.,Huang, Qiuyan.,Li, Yingju.,Hao, Xuehui.,...&Yang, Yuansheng.(2023).The corrosion characteristics and mechanism of directionally solidified Mg-3Zn-xCa alloys.JOURNAL OF MAGNESIUM AND ALLOYS,11(10),3673-3687.
MLA	Zhang, Yi,et al."The corrosion characteristics and mechanism of directionally solidified Mg-3Zn-xCa alloys".JOURNAL OF MAGNESIUM AND ALLOYS 11.10(2023):3673-3687.