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The ability of Mg2Ge crystals to behave as ‘smart release’ inhibitors of the aqueous corrosion of Zn-Al-Mg alloys

Natalie Wint, Amar Malla, N. Cooze, Tim Savill Orcid Logo, Shahin Mehraban, Tom Dunlop Orcid Logo, James Sullivan Orcid Logo, David Penney Orcid Logo, Geraint Williams Orcid Logo, Hamilton McMurray

Corrosion Science, Volume: 179, Start page: 109091

Swansea University Authors: Natalie Wint, Amar Malla, Tim Savill Orcid Logo, Shahin Mehraban, Tom Dunlop Orcid Logo, James Sullivan Orcid Logo, David Penney Orcid Logo, Geraint Williams Orcid Logo, Hamilton McMurray

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DOI (Published version): 10.1016/j.corsci.2020.109091

Abstract

In-situ scanning vibrating electrode technique and time-lapse microscopy are used to investigate the influence of germanium additions (0.19-1.8 wt.%) on the corrosion performance of zinc-aluminium-magnesium model alloys immersed in 0.17 mol.dm-3 NaCl. The addition of Ge results in the formation of M...

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Published in: Corrosion Science
ISSN: 0010-938X
Published: Elsevier BV 2021
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URI: https://cronfa.swan.ac.uk/Record/cronfa55603
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spelling 2021-12-01T14:07:37.1082035 v2 55603 2020-11-05 The ability of Mg2Ge crystals to behave as ‘smart release’ inhibitors of the aqueous corrosion of Zn-Al-Mg alloys 5be5dcc4b97c78b3063e258add4fff5c Natalie Wint Natalie Wint true false 51d0d611e98814e99679d9bb21836e3d Amar Malla Amar Malla true false 633772f4c0a71d30f5603d4f5e0f4730 0000-0002-2750-1492 Tim Savill Tim Savill true false c7e4a4152b2cf403da129be7d1c2904d Shahin Mehraban Shahin Mehraban true false 809395460ab1e6b53a906b136d919c41 0000-0002-5851-8713 Tom Dunlop Tom Dunlop true false 40e32d66748ab74184a31207ab145708 0000-0003-1018-773X James Sullivan James Sullivan true false 869becc35438853f2bca0044df467631 0000-0002-8942-8067 David Penney David Penney true false 0d8fc8d44e2a3c88ce61832f66f20d82 0000-0002-3399-5142 Geraint Williams Geraint Williams true false 56fc1b17ffc3bdf6039dc05c6eba7f2a Hamilton McMurray Hamilton McMurray true false 2020-11-05 FGSEN In-situ scanning vibrating electrode technique and time-lapse microscopy are used to investigate the influence of germanium additions (0.19-1.8 wt.%) on the corrosion performance of zinc-aluminium-magnesium model alloys immersed in 0.17 mol.dm-3 NaCl. The addition of Ge results in the formation of Mg2Ge and a decrease in the fractional area of eutectic phase. A 58 % decrease in SVET derived mass loss is achieved at 1.8 wt.% Ge. It is proposed that Mg2Ge crystals are anodically attacked and behave as reservoirs of Mg2+ ions. Mg(OH)2 is precipitated and local electrolyte pH stabilises to values at which the zinc surface is passive. Journal Article Corrosion Science 179 109091 Elsevier BV 0010-938X A Alloy, A Metal Coating, A Zinc, A Aluminium, A Magnesium, C De alloying 1 2 2021 2021-02-01 10.1016/j.corsci.2020.109091 COLLEGE NANME Science and Engineering - Faculty COLLEGE CODE FGSEN Swansea University 2021-12-01T14:07:37.1082035 2020-11-05T13:49:27.2859839 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering Natalie Wint 1 Amar Malla 2 N. Cooze 3 Tim Savill 0000-0002-2750-1492 4 Shahin Mehraban 5 Tom Dunlop 0000-0002-5851-8713 6 James Sullivan 0000-0003-1018-773X 7 David Penney 0000-0002-8942-8067 8 Geraint Williams 0000-0002-3399-5142 9 Hamilton McMurray 10 55603__18595__1bcad676e8df441d9ce44d7c2e94daee.pdf 55603.pdf 2020-11-05T13:51:39.8170000 Output 4212629 application/pdf Accepted Manuscript true 2021-11-02T00:00:00.0000000 © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license true eng http://creativecommons.org/licenses/by-nc-nd/4.0/
title The ability of Mg2Ge crystals to behave as ‘smart release’ inhibitors of the aqueous corrosion of Zn-Al-Mg alloys
spellingShingle The ability of Mg2Ge crystals to behave as ‘smart release’ inhibitors of the aqueous corrosion of Zn-Al-Mg alloys
Natalie Wint
Amar Malla
Tim Savill
Shahin Mehraban
Tom Dunlop
James Sullivan
David Penney
Geraint Williams
Hamilton McMurray
title_short The ability of Mg2Ge crystals to behave as ‘smart release’ inhibitors of the aqueous corrosion of Zn-Al-Mg alloys
title_full The ability of Mg2Ge crystals to behave as ‘smart release’ inhibitors of the aqueous corrosion of Zn-Al-Mg alloys
title_fullStr The ability of Mg2Ge crystals to behave as ‘smart release’ inhibitors of the aqueous corrosion of Zn-Al-Mg alloys
title_full_unstemmed The ability of Mg2Ge crystals to behave as ‘smart release’ inhibitors of the aqueous corrosion of Zn-Al-Mg alloys
title_sort The ability of Mg2Ge crystals to behave as ‘smart release’ inhibitors of the aqueous corrosion of Zn-Al-Mg alloys
author_id_str_mv 5be5dcc4b97c78b3063e258add4fff5c
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author_id_fullname_str_mv 5be5dcc4b97c78b3063e258add4fff5c_***_Natalie Wint
51d0d611e98814e99679d9bb21836e3d_***_Amar Malla
633772f4c0a71d30f5603d4f5e0f4730_***_Tim Savill
c7e4a4152b2cf403da129be7d1c2904d_***_Shahin Mehraban
809395460ab1e6b53a906b136d919c41_***_Tom Dunlop
40e32d66748ab74184a31207ab145708_***_James Sullivan
869becc35438853f2bca0044df467631_***_David Penney
0d8fc8d44e2a3c88ce61832f66f20d82_***_Geraint Williams
56fc1b17ffc3bdf6039dc05c6eba7f2a_***_Hamilton McMurray
author Natalie Wint
Amar Malla
Tim Savill
Shahin Mehraban
Tom Dunlop
James Sullivan
David Penney
Geraint Williams
Hamilton McMurray
author2 Natalie Wint
Amar Malla
N. Cooze
Tim Savill
Shahin Mehraban
Tom Dunlop
James Sullivan
David Penney
Geraint Williams
Hamilton McMurray
format Journal article
container_title Corrosion Science
container_volume 179
container_start_page 109091
publishDate 2021
institution Swansea University
issn 0010-938X
doi_str_mv 10.1016/j.corsci.2020.109091
publisher Elsevier BV
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Materials Science and Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Materials Science and Engineering
document_store_str 1
active_str 0
description In-situ scanning vibrating electrode technique and time-lapse microscopy are used to investigate the influence of germanium additions (0.19-1.8 wt.%) on the corrosion performance of zinc-aluminium-magnesium model alloys immersed in 0.17 mol.dm-3 NaCl. The addition of Ge results in the formation of Mg2Ge and a decrease in the fractional area of eutectic phase. A 58 % decrease in SVET derived mass loss is achieved at 1.8 wt.% Ge. It is proposed that Mg2Ge crystals are anodically attacked and behave as reservoirs of Mg2+ ions. Mg(OH)2 is precipitated and local electrolyte pH stabilises to values at which the zinc surface is passive.
published_date 2021-02-01T04:09:56Z
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score 11.012924

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