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The Effect of Sodium Hydroxide on Niobium Carbide Precipitates in Thermally Sensitised 20Cr-25Ni-Nb Austenitic Stainless Steel

Ronald N. Clark Orcid Logo, Choen May Chan, Tomas L. Martin, W.S. Walters, Dirk Engelberg, Robert Burrows, Geraint Williams Orcid Logo

Corrosion Science, Start page: 108596

Swansea University Authors: Ronald N. Clark Orcid Logo, Geraint Williams Orcid Logo

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DOI (Published version): 10.1016/j.corsci.2020.108596

Abstract

Niobium-stabilised austenitic stainless steel (20Cr-25Ni-Nb) has been immersed in sodium hydroxide, which is used as a corrosion inhibitor. The work shows how NbC precipitates may be degraded by use of pH 13 NaOH. Initial electrochemical measurements indicate that there is no benefit to this pretrea...

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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/cronfa53821
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last_indexed 2020-09-17T03:17:16Z
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spelling 2020-03-16T15:18:30.7014111 v2 53821 2020-03-16 The Effect of Sodium Hydroxide on Niobium Carbide Precipitates in Thermally Sensitised 20Cr-25Ni-Nb Austenitic Stainless Steel eff2b951eb21917b4b734c665b2cbd8c 0000-0002-5844-7716 Ronald N. Clark Ronald N. Clark true true 0d8fc8d44e2a3c88ce61832f66f20d82 0000-0002-3399-5142 Geraint Williams Geraint Williams true false 2020-03-16 Niobium-stabilised austenitic stainless steel (20Cr-25Ni-Nb) has been immersed in sodium hydroxide, which is used as a corrosion inhibitor. The work shows how NbC precipitates may be degraded by use of pH 13 NaOH. Initial electrochemical measurements indicate that there is no benefit to this pretreatment as regards long-term corrosion inhibition, and post corrosion imaging shows the initiation of pitting corrosion at Nb-rich precipitates still present in the microstructure. Journal Article Corrosion Science 108596 Elsevier BV 0010-938X 16 3 2020 2020-03-16 10.1016/j.corsci.2020.108596 COLLEGE NANME Engineering COLLEGE CODE Swansea University 2020-03-16T15:18:30.7014111 2020-03-16T15:18:30.7014111 Ronald N. Clark 0000-0002-5844-7716 1 Choen May Chan 2 Tomas L. Martin 3 W.S. Walters 4 Dirk Engelberg 5 Robert Burrows 6 Geraint Williams 0000-0002-3399-5142 7 53821__16852__a704a326bb134eafb8b60c351c07773f.pdf 53821.pdf 2020-03-16T15:20:01.1346231 Output 259856 application/pdf Accepted Manuscript true 2021-03-16T00:00:00.0000000 Released under the terms of a Creative Commons Attribution Non-Commercial No Derivatives License (CC-BY-NC-ND). true eng
title The Effect of Sodium Hydroxide on Niobium Carbide Precipitates in Thermally Sensitised 20Cr-25Ni-Nb Austenitic Stainless Steel
spellingShingle The Effect of Sodium Hydroxide on Niobium Carbide Precipitates in Thermally Sensitised 20Cr-25Ni-Nb Austenitic Stainless Steel
Ronald N. Clark
Geraint Williams
title_short The Effect of Sodium Hydroxide on Niobium Carbide Precipitates in Thermally Sensitised 20Cr-25Ni-Nb Austenitic Stainless Steel
title_full The Effect of Sodium Hydroxide on Niobium Carbide Precipitates in Thermally Sensitised 20Cr-25Ni-Nb Austenitic Stainless Steel
title_fullStr The Effect of Sodium Hydroxide on Niobium Carbide Precipitates in Thermally Sensitised 20Cr-25Ni-Nb Austenitic Stainless Steel
title_full_unstemmed The Effect of Sodium Hydroxide on Niobium Carbide Precipitates in Thermally Sensitised 20Cr-25Ni-Nb Austenitic Stainless Steel
title_sort The Effect of Sodium Hydroxide on Niobium Carbide Precipitates in Thermally Sensitised 20Cr-25Ni-Nb Austenitic Stainless Steel
author_id_str_mv eff2b951eb21917b4b734c665b2cbd8c
0d8fc8d44e2a3c88ce61832f66f20d82
author_id_fullname_str_mv eff2b951eb21917b4b734c665b2cbd8c_***_Ronald N. Clark
0d8fc8d44e2a3c88ce61832f66f20d82_***_Geraint Williams
author Ronald N. Clark
Geraint Williams
author2 Ronald N. Clark
Choen May Chan
Tomas L. Martin
W.S. Walters
Dirk Engelberg
Robert Burrows
Geraint Williams
format Journal article
container_title Corrosion Science
container_start_page 108596
publishDate 2020
institution Swansea University
issn 0010-938X
doi_str_mv 10.1016/j.corsci.2020.108596
publisher Elsevier BV
document_store_str 1
active_str 0
description Niobium-stabilised austenitic stainless steel (20Cr-25Ni-Nb) has been immersed in sodium hydroxide, which is used as a corrosion inhibitor. The work shows how NbC precipitates may be degraded by use of pH 13 NaOH. Initial electrochemical measurements indicate that there is no benefit to this pretreatment as regards long-term corrosion inhibition, and post corrosion imaging shows the initiation of pitting corrosion at Nb-rich precipitates still present in the microstructure.
published_date 2020-03-16T04:06:58Z
_version_ 1763753505806352384
score 11.016235

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