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

Y. M. Yan; A. Maltseva; P. Zhou; X. J. Li; Z. R. Zeng; O. Gharbi; K. Ogle; M. La Haye; M. Vaudescal; M. Esmaily; N. Birbilis; P. Volovitch

doi:10.1016/j.corsci.2019.108342

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

Y. M. Yan, A. Maltseva, P. Zhou, X. J. Li, Z. R. Zeng, O. Gharbi, K. Ogle, M. La Haye, M. Vaudescal, M. Esmaily, N. Birbilis, P. Volovitch^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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Abstract

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. Li₂[Al₂(OH)₆]₂·CO₃·nH₂O, 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⁺.

Original language	English
Article number	108342
Journal	Corrosion Science
Volume	164
DOIs	https://doi.org/10.1016/j.corsci.2019.108342
Publication status	Published - Mar 2020

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@article{26199e9a0ac747b9bbe22c7ace522f99,

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

abstract = "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. Li2[Al2(OH)6]2·CO3·nH2O, 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+.",

keywords = "A. Magnesium, B. AES (Auger spectroscopy), B. ICP-OES, B. In-situ Raman spectroscopy, C. Interfaces, C. Neutral inhibition",

author = "Yan, {Y. M.} and A. Maltseva and P. Zhou and Li, {X. J.} and Zeng, {Z. R.} and O. Gharbi and K. Ogle and {La Haye}, M. and M. Vaudescal and M. Esmaily and N. Birbilis and P. Volovitch",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

year = "2020",

month = mar,

doi = "10.1016/j.corsci.2019.108342",

language = "English",

volume = "164",

journal = "Corrosion Science",

issn = "0010-938X",

publisher = "Elsevier Ltd.",

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TY - JOUR

T1 - On the in-situ aqueous stability of an Mg-Li-(Al-Y-Zr) alloy

T2 - Role of Li

AU - Yan, Y. M.

AU - Maltseva, A.

AU - Zhou, P.

AU - Li, X. J.

AU - Zeng, Z. R.

AU - Gharbi, O.

AU - Ogle, K.

AU - La Haye, M.

AU - Vaudescal, M.

AU - Esmaily, M.

AU - Birbilis, N.

AU - Volovitch, P.

PY - 2020/3

Y1 - 2020/3

N2 - 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. Li2[Al2(OH)6]2·CO3·nH2O, 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+.

AB - 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. Li2[Al2(OH)6]2·CO3·nH2O, 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+.

KW - A. Magnesium

KW - B. AES (Auger spectroscopy)

KW - B. ICP-OES

KW - B. In-situ Raman spectroscopy

KW - C. Interfaces

KW - C. Neutral inhibition

UR - http://www.scopus.com/inward/record.url?scp=85076253237&partnerID=8YFLogxK

U2 - 10.1016/j.corsci.2019.108342

DO - 10.1016/j.corsci.2019.108342

M3 - Article

SN - 0010-938X

VL - 164

JO - Corrosion Science

JF - Corrosion Science

M1 - 108342

ER -

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

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