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Quantifying the Role of Transition Metal Electrodeposition in the Cathodic Activation of Corroding Magnesium

E. Michailidou, Hamilton McMurray, Geraint Williams Orcid Logo

Journal of The Electrochemical Society, Volume: 165, Issue: 5, Pages: C195 - C205

Swansea University Authors: Hamilton McMurray, Geraint Williams Orcid Logo

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DOI (Published version): 10.1149/2.0251805jes

Abstract

High purity (80 ppm iron) magnesium immersed in aqueous sodium chloride solution exhibits a filiform pattern of localized corrosion in which hydrogen is evolved at local (filament head) and remote (filament tail and uncorroded surface) cathode sites. Transition metal cations in solution are shown to...

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Published in: Journal of The Electrochemical Society
ISSN: 0013-4651 1945-7111
Published: 2018
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URI: https://cronfa.swan.ac.uk/Record/cronfa39012
first_indexed 2018-03-12T14:33:28Z
last_indexed 2020-12-19T03:59:07Z
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spelling 2020-12-18T14:23:23.2615386 v2 39012 2018-03-12 Quantifying the Role of Transition Metal Electrodeposition in the Cathodic Activation of Corroding Magnesium 56fc1b17ffc3bdf6039dc05c6eba7f2a Hamilton McMurray Hamilton McMurray true false 0d8fc8d44e2a3c88ce61832f66f20d82 0000-0002-3399-5142 Geraint Williams Geraint Williams true false 2018-03-12 High purity (80 ppm iron) magnesium immersed in aqueous sodium chloride solution exhibits a filiform pattern of localized corrosion in which hydrogen is evolved at local (filament head) and remote (filament tail and uncorroded surface) cathode sites. Transition metal cations in solution are shown to significantly accelerate rates of corrosion, principally by activating (catalyzing) the remote cathode sites. The degree of activation is cation concentration dependent and efficiency increases in the order Mn2+ < Fe2+ < Zn2+ < Cu2+. It is proposed that activation occurs as a result of transition metal electrodeposition through a displacement reaction. It is also shown that precipitation of insoluble transition metal (hydr)oxides through time-dependent cation hydrolysis competes with, and reduces the efficiency of, electrodeposition-induced cathodic activation. Journal Article Journal of The Electrochemical Society 165 5 C195 C205 0013-4651 1945-7111 31 12 2018 2018-12-31 10.1149/2.0251805jes COLLEGE NANME COLLEGE CODE Swansea University 2020-12-18T14:23:23.2615386 2018-03-12T09:28:56.1686763 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering E. Michailidou 1 Hamilton McMurray 2 Geraint Williams 0000-0002-3399-5142 3 0039012-17042018152248.pdf michailidou2018(2)v2.pdf 2018-04-17T15:22:48.7100000 Output 1672038 application/pdf Version of Record true This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License. true eng http://creativecommons.org/licenses/by/4.0
title Quantifying the Role of Transition Metal Electrodeposition in the Cathodic Activation of Corroding Magnesium
spellingShingle Quantifying the Role of Transition Metal Electrodeposition in the Cathodic Activation of Corroding Magnesium
Hamilton McMurray
Geraint Williams
title_short Quantifying the Role of Transition Metal Electrodeposition in the Cathodic Activation of Corroding Magnesium
title_full Quantifying the Role of Transition Metal Electrodeposition in the Cathodic Activation of Corroding Magnesium
title_fullStr Quantifying the Role of Transition Metal Electrodeposition in the Cathodic Activation of Corroding Magnesium
title_full_unstemmed Quantifying the Role of Transition Metal Electrodeposition in the Cathodic Activation of Corroding Magnesium
title_sort Quantifying the Role of Transition Metal Electrodeposition in the Cathodic Activation of Corroding Magnesium
author_id_str_mv 56fc1b17ffc3bdf6039dc05c6eba7f2a
0d8fc8d44e2a3c88ce61832f66f20d82
author_id_fullname_str_mv 56fc1b17ffc3bdf6039dc05c6eba7f2a_***_Hamilton McMurray
0d8fc8d44e2a3c88ce61832f66f20d82_***_Geraint Williams
author Hamilton McMurray
Geraint Williams
author2 E. Michailidou
Hamilton McMurray
Geraint Williams
format Journal article
container_title Journal of The Electrochemical Society
container_volume 165
container_issue 5
container_start_page C195
publishDate 2018
institution Swansea University
issn 0013-4651
1945-7111
doi_str_mv 10.1149/2.0251805jes
college_str Faculty of Science and Engineering
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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 High purity (80 ppm iron) magnesium immersed in aqueous sodium chloride solution exhibits a filiform pattern of localized corrosion in which hydrogen is evolved at local (filament head) and remote (filament tail and uncorroded surface) cathode sites. Transition metal cations in solution are shown to significantly accelerate rates of corrosion, principally by activating (catalyzing) the remote cathode sites. The degree of activation is cation concentration dependent and efficiency increases in the order Mn2+ < Fe2+ < Zn2+ < Cu2+. It is proposed that activation occurs as a result of transition metal electrodeposition through a displacement reaction. It is also shown that precipitation of insoluble transition metal (hydr)oxides through time-dependent cation hydrolysis competes with, and reduces the efficiency of, electrodeposition-induced cathodic activation.
published_date 2018-12-31T07:24:02Z
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score 11.04748

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