Marine atmospheric corrosion of carbon steel in the tropical microclimate of Port Louis
Marine atmospheric corrosion of carbon steel in the tropical microclimate of Port Louis
The atmospheric corrosion performance of S235 carbon steel is assessed when exposed to the tropical/marine aerosol pollutants of Port Louis, Mauritius. Port Louis is situated on the northwest coast and has a distinct microclimate, leading to major atmospheric corrosion concerns. In addition, sulphur dioxide emissions from three heavy oil‐fired power stations complicate corrosion prediction within the region. Mass‐loss analysis shows distinctive corrosion progression behaviours linked to the environmental and geographical variables. The formation of porous surface layers leads to a continuous increase in metal dissolution during the electrochemical process. The surface analysis reveals lepidocrocite (γ‐FeOOH) and goethite (γ‐FeOOH) as the predominant rust phases, with low percentages of magnetite (Fe3O4), akageneite (β‐FeOOH) and jarosite (KFe3(OH) (SO4)2). A key insight in the S235 atmospheric corrosion involves two stages: the early rapid corrosion stage followed by a slow stage of linear or power‐law corrosion kinetics due to the formation of stable rust phases.
Atmospheric corrosion, carbon steel, rust, SEM, weight loss, X‐ray diffraction, rust, weight loss, X-ray diffraction, SEM, atmospheric corrosion, carbon steel
1474-1489
Wharton, Julian
965a38fd-d2bc-4a19-a08c-2d4e036aa96b
Seechurn, Yashwantraj
25b027fb-7a6c-4b86-ba1a-b8cfb9e609f4
Surnam, Baboo Y. R.
3ef61dd7-3134-48f9-aa83-dcf2ded0c5f8
September 2022
Wharton, Julian
965a38fd-d2bc-4a19-a08c-2d4e036aa96b
Seechurn, Yashwantraj
25b027fb-7a6c-4b86-ba1a-b8cfb9e609f4
Surnam, Baboo Y. R.
3ef61dd7-3134-48f9-aa83-dcf2ded0c5f8
Wharton, Julian, Seechurn, Yashwantraj and Surnam, Baboo Y. R.
(2022)
Marine atmospheric corrosion of carbon steel in the tropical microclimate of Port Louis.
Materials and Corrosion, 73 (9), .
(doi:10.1002/maco.202112871).
Abstract
The atmospheric corrosion performance of S235 carbon steel is assessed when exposed to the tropical/marine aerosol pollutants of Port Louis, Mauritius. Port Louis is situated on the northwest coast and has a distinct microclimate, leading to major atmospheric corrosion concerns. In addition, sulphur dioxide emissions from three heavy oil‐fired power stations complicate corrosion prediction within the region. Mass‐loss analysis shows distinctive corrosion progression behaviours linked to the environmental and geographical variables. The formation of porous surface layers leads to a continuous increase in metal dissolution during the electrochemical process. The surface analysis reveals lepidocrocite (γ‐FeOOH) and goethite (γ‐FeOOH) as the predominant rust phases, with low percentages of magnetite (Fe3O4), akageneite (β‐FeOOH) and jarosite (KFe3(OH) (SO4)2). A key insight in the S235 atmospheric corrosion involves two stages: the early rapid corrosion stage followed by a slow stage of linear or power‐law corrosion kinetics due to the formation of stable rust phases.
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Materials Corrosion - 2022 - Seechurn - Marine atmospheric corrosion of carbon steel in the tropical microclimate of Port
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Accepted/In Press date: 25 February 2022
Published date: September 2022
Additional Information:
Funding Information:
The authors express their gratitude to the Central Electricity Board, Mauritius Civil Service Mutual Aid Association Ltd. and Rajiv Gandhi Science Centre for allocating the required space in their premises for the field tests. The authors would also like to thank the Mauritius Meteorological Services for providing the climatic data. This study received funding under the Africa Collaboration Grant to conduct X-ray diffraction analysis, scanning electron microscopy and energy-dispersive X-ray spectroscopy using equipment available at Stellenbosch University. Correction added on 4 April 2022, after first online publication: Online open access has been added. Open access funded by JISC - UNIVERSITY OF SOUTHAMPTON.
Publisher Copyright:
© 2022 The Authors. Materials and Corrosion published by Wiley-VCH GmbH.
Keywords:
Atmospheric corrosion, carbon steel, rust, SEM, weight loss, X‐ray diffraction, rust, weight loss, X-ray diffraction, SEM, atmospheric corrosion, carbon steel
Identifiers
Local EPrints ID: 472480
URI: http://eprints.soton.ac.uk/id/eprint/472480
PURE UUID: e9068869-d1b9-4525-876f-9f46db354dee
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Date deposited: 06 Dec 2022 17:43
Last modified: 17 Mar 2024 02:46
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Author:
Yashwantraj Seechurn
Author:
Baboo Y. R. Surnam
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