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The influence of arsenic alloying on the localised corrosion behaviour of magnesium

Geraint Williams Orcid Logo, H. Ap-Llwyd Dafydd, Hamilton McMurray, N. Birbilis

Electrochimica Acta, Volume: 219, Pages: 401 - 411

Swansea University Authors: Geraint Williams Orcid Logo, Hamilton McMurray

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DOI (Published version): 10.1016/j.electacta.2016.10.006

Abstract

An in-situ scanning vibrating electrode technique is used to investigate the effect of alloyed arsenic on magnesium immersed in chloride containing aqueous solution, both in freely corroding and anodically polarised conditions. Arsenic is shown to strongly suppress cathodic activation of the corrodi...

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Published in: Electrochimica Acta
ISSN: 0013-4686
Published: 2016
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URI: https://cronfa.swan.ac.uk/Record/cronfa30310
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first_indexed 2016-10-03T13:07:23Z
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spelling 2020-07-17T13:10:52.1517555 v2 30310 2016-10-03 The influence of arsenic alloying on the localised corrosion behaviour of magnesium 0d8fc8d44e2a3c88ce61832f66f20d82 0000-0002-3399-5142 Geraint Williams Geraint Williams true false 56fc1b17ffc3bdf6039dc05c6eba7f2a Hamilton McMurray Hamilton McMurray true false 2016-10-03 MTLS An in-situ scanning vibrating electrode technique is used to investigate the effect of alloyed arsenic on magnesium immersed in chloride containing aqueous solution, both in freely corroding and anodically polarised conditions. Arsenic is shown to strongly suppress cathodic activation of the corroding Mg even under circumstances where breakdown has occurred and subsequent propagation of dark filiform-like tracks is observed. Under galvanostatic anodic polarisation, rates of hydrogen evolution are significantly mitigated compared to pure Mg and no time-dependent evolution of local cathodic sites is detected. The findings support the theory that cathodic activation of the dark corroded Mg surface is associated with accumulated transition metal impurity, which in turn become poisoned towards cathodic hydrogen evolution by the presence of As. In addition, these preliminary studies suggest that alloying with a strong cathodic poison may provide a means of producing a more-charge effective anode material for primary sea-water activated Mg batteries. Journal Article Electrochimica Acta 219 401 411 0013-4686 20 11 2016 2016-11-20 10.1016/j.electacta.2016.10.006 COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University 2020-07-17T13:10:52.1517555 2016-10-03T09:08:33.0931507 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering Geraint Williams 0000-0002-3399-5142 1 H. Ap-Llwyd Dafydd 2 Hamilton McMurray 3 N. Birbilis 4 0030310-05102016141523.pdf williams2016(2).pdf 2016-10-05T14:15:23.9470000 Output 1435911 application/pdf Accepted Manuscript true 2017-10-03T00:00:00.0000000 true
title The influence of arsenic alloying on the localised corrosion behaviour of magnesium
spellingShingle The influence of arsenic alloying on the localised corrosion behaviour of magnesium
Geraint Williams
Hamilton McMurray
title_short The influence of arsenic alloying on the localised corrosion behaviour of magnesium
title_full The influence of arsenic alloying on the localised corrosion behaviour of magnesium
title_fullStr The influence of arsenic alloying on the localised corrosion behaviour of magnesium
title_full_unstemmed The influence of arsenic alloying on the localised corrosion behaviour of magnesium
title_sort The influence of arsenic alloying on the localised corrosion behaviour of magnesium
author_id_str_mv 0d8fc8d44e2a3c88ce61832f66f20d82
56fc1b17ffc3bdf6039dc05c6eba7f2a
author_id_fullname_str_mv 0d8fc8d44e2a3c88ce61832f66f20d82_***_Geraint Williams
56fc1b17ffc3bdf6039dc05c6eba7f2a_***_Hamilton McMurray
author Geraint Williams
Hamilton McMurray
author2 Geraint Williams
H. Ap-Llwyd Dafydd
Hamilton McMurray
N. Birbilis
format Journal article
container_title Electrochimica Acta
container_volume 219
container_start_page 401
publishDate 2016
institution Swansea University
issn 0013-4686
doi_str_mv 10.1016/j.electacta.2016.10.006
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 An in-situ scanning vibrating electrode technique is used to investigate the effect of alloyed arsenic on magnesium immersed in chloride containing aqueous solution, both in freely corroding and anodically polarised conditions. Arsenic is shown to strongly suppress cathodic activation of the corroding Mg even under circumstances where breakdown has occurred and subsequent propagation of dark filiform-like tracks is observed. Under galvanostatic anodic polarisation, rates of hydrogen evolution are significantly mitigated compared to pure Mg and no time-dependent evolution of local cathodic sites is detected. The findings support the theory that cathodic activation of the dark corroded Mg surface is associated with accumulated transition metal impurity, which in turn become poisoned towards cathodic hydrogen evolution by the presence of As. In addition, these preliminary studies suggest that alloying with a strong cathodic poison may provide a means of producing a more-charge effective anode material for primary sea-water activated Mg batteries.
published_date 2016-11-20T03:36:59Z
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score 11.017731

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