Owen, J orcid.org/0000-0003-0778-0858, Ropital, F, Joshi, GR et al. (2 more authors) (2022) Galvanic effects induced by siderite and cementite surface layers on carbon steel in aqueous CO2 environments. Corrosion Science, 209. 110762. ISSN 0010-938X
Abstract
Siderite (FeCO3) and cementite (Fe3C) layers develop naturally on carbon steel surfaces in aqueous carbon dioxide (CO2) environments. This study evaluates galvanic corrosion induced by such layers when coupled to bare carbon steel. In CO2-saturated, 50 °C, pH 5 conditions, the Fe3C-filmed carbon steel acted as the net cathode, significantly enhancing bare steel corrosion rates. Galvanic currents induced by the FeCO3-filmed steel were much lower, with FeCO3 removed from the surface as Fe3C was revealed concomitantly on bare steel. It is proposed that the presence of Fe3C amongst the FeCO3 layer is responsible for galvanic interaction, rather than FeCO3 itself.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2022 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
Keywords: | Carbon steel; iron carbide; iron carbonate; galvanic corrosion; localised corrosion; electrochemistry |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mechanical Engineering (Leeds) > Institute of Engineering Thermofluids, Surfaces & Interfaces (iETSI) (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 04 Nov 2022 16:10 |
Last Modified: | 19 May 2023 12:17 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.corsci.2022.110762 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:192759 |