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An Experimental Survey of the Cathodic Activation of Metals Including Mg, Sc, Gd, La, Al, Sn, Pb, and Ge in Dilute Chloride Solutions of Varying pH

R.L. Liu, S. Thomas, J.R. Scully, G. Williams, N. Birbilis, Geraint Williams Orcid Logo

CORROSION, Volume: 73, Issue: 5, Pages: 494 - 505

Swansea University Author: Geraint Williams Orcid Logo

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DOI (Published version): 10.5006/2282

Abstract

The kinetics of the hydrogen evolution reaction (HER) have been reported to increase upon pure magnesium (Mg) surfaces, following prior anodic polarisation or corrosion. This phenomenon is termed anodically induced âÂÂcathodic activationâÂÂ, which is not necessarily an elementary concept. The tend...

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Published in: CORROSION
ISSN: 0010-9312 1938-159X
Published: 2017
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URI: https://cronfa.swan.ac.uk/Record/cronfa32001
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spelling 2018-12-04T08:53:27.0631751 v2 32001 2017-02-16 An Experimental Survey of the Cathodic Activation of Metals Including Mg, Sc, Gd, La, Al, Sn, Pb, and Ge in Dilute Chloride Solutions of Varying pH 0d8fc8d44e2a3c88ce61832f66f20d82 0000-0002-3399-5142 Geraint Williams Geraint Williams true false 2017-02-16 MTLS The kinetics of the hydrogen evolution reaction (HER) have been reported to increase upon pure magnesium (Mg) surfaces, following prior anodic polarisation or corrosion. This phenomenon is termed anodically induced âÂÂcathodic activationâÂÂ, which is not necessarily an elementary concept. The tendencies of other metals to exhibit cathodic activation has not been systematically explored in the past. In this study, an experimental survey of cathodic activation was conducted for different metals on the basis of understanding the origin of the cathodic activation phenomenon on Mg; including the metals Sc, Gd, La, Al, Sn, Pb and Ge, in 0.1 M NaCl with pH ranging from 3-11. Sc, Gd, La and Mg showed cathodic activation in solutions of various pH, whereas Al showed cathodic activation only in an acidic solution. Sn, Pb and Ge did not show significant cathodic activation across the pH range tested. It is proposed on the basis of the results herein, metals that tend to directly react with water to form hydroxides in aqueous electrolytes have a higher tendency to demonstrate cathodic activation. Journal Article CORROSION 73 5 494 505 0010-9312 1938-159X 31 5 2017 2017-05-31 10.5006/2282 COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University 2018-12-04T08:53:27.0631751 2017-02-16T11:30:18.8125601 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering R.L. Liu 1 S. Thomas 2 J.R. Scully 3 G. Williams 4 N. Birbilis 5 Geraint Williams 0000-0002-3399-5142 6 0032001-16022017113101.pdf liu2017.pdf 2017-02-16T11:31:01.8870000 Output 1819169 application/pdf Accepted Manuscript true 2017-05-15T00:00:00.0000000 true eng
title An Experimental Survey of the Cathodic Activation of Metals Including Mg, Sc, Gd, La, Al, Sn, Pb, and Ge in Dilute Chloride Solutions of Varying pH
spellingShingle An Experimental Survey of the Cathodic Activation of Metals Including Mg, Sc, Gd, La, Al, Sn, Pb, and Ge in Dilute Chloride Solutions of Varying pH
Geraint Williams
title_short An Experimental Survey of the Cathodic Activation of Metals Including Mg, Sc, Gd, La, Al, Sn, Pb, and Ge in Dilute Chloride Solutions of Varying pH
title_full An Experimental Survey of the Cathodic Activation of Metals Including Mg, Sc, Gd, La, Al, Sn, Pb, and Ge in Dilute Chloride Solutions of Varying pH
title_fullStr An Experimental Survey of the Cathodic Activation of Metals Including Mg, Sc, Gd, La, Al, Sn, Pb, and Ge in Dilute Chloride Solutions of Varying pH
title_full_unstemmed An Experimental Survey of the Cathodic Activation of Metals Including Mg, Sc, Gd, La, Al, Sn, Pb, and Ge in Dilute Chloride Solutions of Varying pH
title_sort An Experimental Survey of the Cathodic Activation of Metals Including Mg, Sc, Gd, La, Al, Sn, Pb, and Ge in Dilute Chloride Solutions of Varying pH
author_id_str_mv 0d8fc8d44e2a3c88ce61832f66f20d82
author_id_fullname_str_mv 0d8fc8d44e2a3c88ce61832f66f20d82_***_Geraint Williams
author Geraint Williams
author2 R.L. Liu
S. Thomas
J.R. Scully
G. Williams
N. Birbilis
Geraint Williams
format Journal article
container_title CORROSION
container_volume 73
container_issue 5
container_start_page 494
publishDate 2017
institution Swansea University
issn 0010-9312
1938-159X
doi_str_mv 10.5006/2282
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 The kinetics of the hydrogen evolution reaction (HER) have been reported to increase upon pure magnesium (Mg) surfaces, following prior anodic polarisation or corrosion. This phenomenon is termed anodically induced âÂÂcathodic activationâÂÂ, which is not necessarily an elementary concept. The tendencies of other metals to exhibit cathodic activation has not been systematically explored in the past. In this study, an experimental survey of cathodic activation was conducted for different metals on the basis of understanding the origin of the cathodic activation phenomenon on Mg; including the metals Sc, Gd, La, Al, Sn, Pb and Ge, in 0.1 M NaCl with pH ranging from 3-11. Sc, Gd, La and Mg showed cathodic activation in solutions of various pH, whereas Al showed cathodic activation only in an acidic solution. Sn, Pb and Ge did not show significant cathodic activation across the pH range tested. It is proposed on the basis of the results herein, metals that tend to directly react with water to form hydroxides in aqueous electrolytes have a higher tendency to demonstrate cathodic activation.
published_date 2017-05-31T03:39:08Z
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