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The role of niobium carbides in the localised corrosion initiation of 20Cr-25Ni-Nb advanced gas-cooled reactor fuel cladding

Ronald N. Clark, Justin Searle, Tomas L. Martin, W.S. Walters, Geraint Williams Orcid Logo, Justin Searle Orcid Logo

Corrosion Science, Volume: 165, Start page: 108365

Swansea University Authors: Geraint Williams Orcid Logo, Justin Searle Orcid Logo

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DOI (Published version): 10.1016/j.corsci.2019.108365

Abstract

The role of niobium carbide (NbC) inclusions in directing the initiation of localised corrosion in sensitised 20Cr-25Ni-Nb stainless steel is investigated using a range of in-situ scanning techniques, allowing visualisation of corrosion behaviour over multiple length scales. Volta potential mapping...

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Published in: Corrosion Science
ISSN: 0010-938X
Published: Elsevier BV 2020
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URI: https://cronfa.swan.ac.uk/Record/cronfa52970
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spelling 2021-03-18T14:55:34.0470542 v2 52970 2019-12-05 The role of niobium carbides in the localised corrosion initiation of 20Cr-25Ni-Nb advanced gas-cooled reactor fuel cladding 0d8fc8d44e2a3c88ce61832f66f20d82 0000-0002-3399-5142 Geraint Williams Geraint Williams true false 0e3f2c3812f181eaed11c45554d4cdd0 0000-0003-1101-075X Justin Searle Justin Searle true false 2019-12-05 MTLS The role of niobium carbide (NbC) inclusions in directing the initiation of localised corrosion in sensitised 20Cr-25Ni-Nb stainless steel is investigated using a range of in-situ scanning techniques, allowing visualisation of corrosion behaviour over multiple length scales. Volta potential mapping shows NbC inclusions are up to 30 mV noble to the matrix, while chromium-depleted grain boundaries are up to 65 mV less noble. Corrosion initiation, shown by scanning vibrating electrode technique to comprise highly localised anode sites, is observed at grain boundaries, adjacent to the location of NbC inclusion clusters which remain unaffected by anodic dissolution of the surrounding matrix. Journal Article Corrosion Science 165 108365 Elsevier BV 0010-938X Stainless steel A, AFM B, SEM B, Intergranular corrosion C, Pitting corrosion C, Inclusion C 1 4 2020 2020-04-01 10.1016/j.corsci.2019.108365 http://dx.doi.org/10.1016/j.corsci.2019.108365 COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University 2021-03-18T14:55:34.0470542 2019-12-05T11:12:11.2956680 Professional Services ISS - Uncategorised Ronald N. Clark 1 Justin Searle 2 Tomas L. Martin 3 W.S. Walters 4 Geraint Williams 0000-0002-3399-5142 5 Justin Searle 0000-0003-1101-075X 6 52970__16044__36f8e5f744a04e6f9654efd988532505.pdf clark2019(3).pdf 2019-12-05T11:16:51.5293598 Output 5350028 application/pdf Accepted Manuscript true 2020-11-30T00:00:00.0000000 true © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
title The role of niobium carbides in the localised corrosion initiation of 20Cr-25Ni-Nb advanced gas-cooled reactor fuel cladding
spellingShingle The role of niobium carbides in the localised corrosion initiation of 20Cr-25Ni-Nb advanced gas-cooled reactor fuel cladding
Geraint Williams
Justin Searle
title_short The role of niobium carbides in the localised corrosion initiation of 20Cr-25Ni-Nb advanced gas-cooled reactor fuel cladding
title_full The role of niobium carbides in the localised corrosion initiation of 20Cr-25Ni-Nb advanced gas-cooled reactor fuel cladding
title_fullStr The role of niobium carbides in the localised corrosion initiation of 20Cr-25Ni-Nb advanced gas-cooled reactor fuel cladding
title_full_unstemmed The role of niobium carbides in the localised corrosion initiation of 20Cr-25Ni-Nb advanced gas-cooled reactor fuel cladding
title_sort The role of niobium carbides in the localised corrosion initiation of 20Cr-25Ni-Nb advanced gas-cooled reactor fuel cladding
author_id_str_mv 0d8fc8d44e2a3c88ce61832f66f20d82
0e3f2c3812f181eaed11c45554d4cdd0
author_id_fullname_str_mv 0d8fc8d44e2a3c88ce61832f66f20d82_***_Geraint Williams
0e3f2c3812f181eaed11c45554d4cdd0_***_Justin Searle
author Geraint Williams
Justin Searle
author2 Ronald N. Clark
Justin Searle
Tomas L. Martin
W.S. Walters
Geraint Williams
Justin Searle
format Journal article
container_title Corrosion Science
container_volume 165
container_start_page 108365
publishDate 2020
institution Swansea University
issn 0010-938X
doi_str_mv 10.1016/j.corsci.2019.108365
publisher Elsevier BV
college_str Professional Services
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hierarchy_top_title Professional Services
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hierarchy_parent_title Professional Services
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url http://dx.doi.org/10.1016/j.corsci.2019.108365
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description The role of niobium carbide (NbC) inclusions in directing the initiation of localised corrosion in sensitised 20Cr-25Ni-Nb stainless steel is investigated using a range of in-situ scanning techniques, allowing visualisation of corrosion behaviour over multiple length scales. Volta potential mapping shows NbC inclusions are up to 30 mV noble to the matrix, while chromium-depleted grain boundaries are up to 65 mV less noble. Corrosion initiation, shown by scanning vibrating electrode technique to comprise highly localised anode sites, is observed at grain boundaries, adjacent to the location of NbC inclusion clusters which remain unaffected by anodic dissolution of the surrounding matrix.
published_date 2020-04-01T04:05:40Z
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