On the in-situ aqueous stability of an Mg-Li-(Al-Y-Zr) alloy: Role of Li

被引：37
作者：
Yan, Y. M. [1 ,2 ]
Maltseva, A. [2 ]
Zhou, P. [2 ,3 ]
Li, X. J. [2 ]
Zeng, Z. R. [1 ]
Gharbi, O. [4 ]
Ogle, K. [2 ]
La Haye, M. [6 ]
Vaudescal, M. [6 ]
Esmaily, M. [1 ,7 ]
Birbilis, N. [5 ]
Volovitch, P. [2 ]
机构：
[1] Monash Univ, Dept Mat Sci & Engn, Clayton, Vic 3800, Australia
[2] PSL Res Univ, Chim ParisTech, CNRS, IRCP, F-75005 Paris, France
[3] Northeastern Univ, Shenyang Natl Lab Mat Sci, Shenyang 110819, Peoples R China
[4] Sorbonne Univ, CNRS, LISE, F-75005 Paris, France
[5] Australian Natl Univ, Coll Engn & Comp Sci, Canberra, ACT 2601, Australia
[6] PLACAMAT, 87 Ave Docteur Albert Schweitzer, F-33608 Pessac, France
[7] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA
来源：
CORROSION SCIENCE | 2020年 / 164卷
关键词：
Magnesium; In-situ Raman spectroscopy; ICP-OES; AES (Auger spectroscopy); Interfaces; Neutral inhibition; ATOMIC-EMISSION SPECTROELECTROCHEMISTRY; ENHANCED CATALYTIC-ACTIVITY; MECHANICAL-PROPERTIES; ANODIC-DISSOLUTION; MAGNESIUM ALLOYS; DETECTION LIMITS; MG; CORROSION; LITHIUM; MICROSTRUCTURE;
D O I：
10.1016/j.corsci.2019.108342
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The aqueous stability of a corrosion resistant Mg-Li(-Al-Y-Zr)-alloy was investigated by combining in-situ confocal Raman Microscopy, Atomic Emission SpectroElectroChemistry, ex-situ Photoluminiscence Spectroscopy, Auger Electron Spectroscopy and Glow Discharge Optical Emission Spectroscopy. Li and Mg dissolved from visually intact anodic areas, leaving a Li-depleted metallic layer under approximately 100 nm thick Li-doped MgO. The transformation MgO -> Mg(OH)(2) was inhibited. Li-2[Al-2(OH)(6)](2)center dot CO3 center dot nH(2)O, LiAlO2, Y2O3 and Mg(OH)(2) accumulated locally around active cathodic sites. New corrosion mechanism is proposed, which associates the improved corrosion resistance of Mg-Li alloys with an enhanced chemical stability and modified catalytic activity of MgO in presence of Li+.
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页数：13
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