Unraveling the precipitate-induced discontinuity of the surface oxide film on Al alloy

doi:10.1016/j.apsusc.2022.153108

CORC > 金属研究所 > 中国科学院金属研究所

	Unraveling the precipitate-induced discontinuity of the surface oxide film on Al alloy
	Zhou, Y. T.2; Jia, X. L.1,2; Li, J. B.1,2; Guan, G. G.1,2; Ma, X. L.2; Zhang, J. S.2
刊名	APPLIED SURFACE SCIENCE
	2022-07-15
卷号	590 页码:10
关键词	Aluminum alloy Surface oxide Precipitate Transmission electron microscopy Quasi in-situ
ISSN号	0169-4332
DOI	10.1016/j.apsusc.2022.153108
通讯作者	Zhou, Y. T.(ytzhou@imr.ac.cn)
英文摘要	Precipitate-induced discontinuity of the surface oxide film is a significant reason for the increasing pitting susceptibility of age-hardening aluminum alloys but lacking of direct characterization. In the present work, the oxide film heterogeneity induced by Mg(Zn,Cu)(2) particles with different sizes in an Al-Zn-Mg-Cu alloy and the consequent corrosion behaviors were studied. Quasi in-situ transmission electron microscopy (TEM) observations indicated that the eta'-Mg(Zn,Cu)(2) precipitates with sizes less than 10 nm were electrochemically inert, while the grown eta particles underwent de-alloying and then promoted pitting events of the nearby alloy matrix. By means of cross-sectioning, it was revealed that the surface film on the solid solution and peak-aged alloys were structurally uniform although oxidation of the eta' resulted in local Mg enrichment in the surface film. For the grown eta particle, the Mg-rich zone was remarkable and covered not only the particle but also the surrounding alloy matrix. The flawed structure in the Mg-rich area should be responsible for the immediately de-alloying of the precipitate and then the corrosion attack of the peripheric alloy.
资助项目	research foundation of SYNL[L2019F15]
WOS研究方向	Chemistry ; Materials Science ; Physics
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000788220700003
资助机构	research foundation of SYNL
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/172566]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zhou, Y. T.
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Y. T.,Jia, X. L.,Li, J. B.,et al. Unraveling the precipitate-induced discontinuity of the surface oxide film on Al alloy[J]. APPLIED SURFACE SCIENCE,2022,590:10.
APA	Zhou, Y. T.,Jia, X. L.,Li, J. B.,Guan, G. G.,Ma, X. L.,&Zhang, J. S..(2022).Unraveling the precipitate-induced discontinuity of the surface oxide film on Al alloy.APPLIED SURFACE SCIENCE,590,10.
MLA	Zhou, Y. T.,et al."Unraveling the precipitate-induced discontinuity of the surface oxide film on Al alloy".APPLIED SURFACE SCIENCE 590(2022):10.