| Unraveling the precipitate-induced discontinuity of the surface oxide film on Al alloy | |
| Zhou, Y. T.1; Jia, X. L.1,2; Li, J. B.1,2; Guan, G. G.1,2; Ma, X. L.1; Zhang, J. S.1 | |
| Corresponding Author | Zhou, Y. T.(ytzhou@imr.ac.cn) |
| 2022-07-15 | |
| Source Publication | APPLIED SURFACE SCIENCE
 |
| ISSN | 0169-4332 |
| Volume | 590Pages:10 |
| Abstract | 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. |
| Keyword | Aluminum alloy Surface oxide Precipitate Transmission electron microscopy Quasi in-situ |
| Funding Organization | research foundation of SYNL |
| DOI | 10.1016/j.apsusc.2022.153108 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | research foundation of SYNL[L2019F15] |
| WOS Research Area | Chemistry ; Materials Science ; Physics |
| WOS Subject | Chemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter |
| WOS ID | WOS:000788220700003 |
| Publisher | ELSEVIER |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/172567 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Zhou, Y. T. |
| Affiliation | 1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China |
| Recommended Citation 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. |
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