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The Evolution of Anodic Hydrogen on High Purity Magnesium in Acidic Buffer Solution

Santiago Fajardo, Carol Glover, Geraint Williams Orcid Logo, Gerald Frankel

Corrosion

Swansea University Author: Geraint Williams Orcid Logo

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DOI (Published version): 10.5006/2247

Abstract

Hydrogen evolution (HE) on anodically polarized Mg, commonly referred to as Negative Difference Effect, was studied by galvanodynamic measurements coupled with real-time gravimetric H2 volume collection, the Scanning Vibrating Electrode Technique and potentiodynamic polarization experiments. High pu...

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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/cronfa32003
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last_indexed 2018-02-09T05:19:27Z
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spelling 2017-02-16T12:30:16.3913551 v2 32003 2017-02-16 The Evolution of Anodic Hydrogen on High Purity Magnesium in Acidic Buffer Solution 0d8fc8d44e2a3c88ce61832f66f20d82 0000-0002-3399-5142 Geraint Williams Geraint Williams true false 2017-02-16 MTLS Hydrogen evolution (HE) on anodically polarized Mg, commonly referred to as Negative Difference Effect, was studied by galvanodynamic measurements coupled with real-time gravimetric H2 volume collection, the Scanning Vibrating Electrode Technique and potentiodynamic polarization experiments. High purity Mg (99.96% Mg) electrodes were studied in chloride-free 0.1 M citric acid solution buffered at pH with the aim of determining the source of anodic HE and the role of the corrosion film on the process. In such conditions of pH, the typical dark corrosion product exhibited in neutral and alkaline solutions was not found but the HE rate still increased with increasing potential. Evidence that HE on dissolving high purity Mg is associated with the regions dominated by the anodic dissolution reaction is provided. The role of noble impurity enrichment on the electrode surface during anodic polarization and the effect of Fe re-deposition are also discussed. Journal Article Corrosion 0010-9312 1938-159X 31 12 2017 2017-12-31 10.5006/2247 COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University 2017-02-16T12:30:16.3913551 2017-02-16T12:29:02.6644465 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering Santiago Fajardo 1 Carol Glover 2 Geraint Williams 0000-0002-3399-5142 3 Gerald Frankel 4 0032003-16022017122956.pdf fajardo2017.pdf 2017-02-16T12:29:56.9370000 Output 1191658 application/pdf Accepted Manuscript true 2017-05-15T00:00:00.0000000 false eng
title The Evolution of Anodic Hydrogen on High Purity Magnesium in Acidic Buffer Solution
spellingShingle The Evolution of Anodic Hydrogen on High Purity Magnesium in Acidic Buffer Solution
Geraint Williams
title_short The Evolution of Anodic Hydrogen on High Purity Magnesium in Acidic Buffer Solution
title_full The Evolution of Anodic Hydrogen on High Purity Magnesium in Acidic Buffer Solution
title_fullStr The Evolution of Anodic Hydrogen on High Purity Magnesium in Acidic Buffer Solution
title_full_unstemmed The Evolution of Anodic Hydrogen on High Purity Magnesium in Acidic Buffer Solution
title_sort The Evolution of Anodic Hydrogen on High Purity Magnesium in Acidic Buffer Solution
author_id_str_mv 0d8fc8d44e2a3c88ce61832f66f20d82
author_id_fullname_str_mv 0d8fc8d44e2a3c88ce61832f66f20d82_***_Geraint Williams
author Geraint Williams
author2 Santiago Fajardo
Carol Glover
Geraint Williams
Gerald Frankel
format Journal article
container_title Corrosion
publishDate 2017
institution Swansea University
issn 0010-9312
1938-159X
doi_str_mv 10.5006/2247
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 Hydrogen evolution (HE) on anodically polarized Mg, commonly referred to as Negative Difference Effect, was studied by galvanodynamic measurements coupled with real-time gravimetric H2 volume collection, the Scanning Vibrating Electrode Technique and potentiodynamic polarization experiments. High purity Mg (99.96% Mg) electrodes were studied in chloride-free 0.1 M citric acid solution buffered at pH with the aim of determining the source of anodic HE and the role of the corrosion film on the process. In such conditions of pH, the typical dark corrosion product exhibited in neutral and alkaline solutions was not found but the HE rate still increased with increasing potential. Evidence that HE on dissolving high purity Mg is associated with the regions dominated by the anodic dissolution reaction is provided. The role of noble impurity enrichment on the electrode surface during anodic polarization and the effect of Fe re-deposition are also discussed.
published_date 2017-12-31T03:39:08Z
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score 11.036706

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