Mechanistic modelling of atmospheric corrosion of carbon steel in Port-Louis by electrochemical characterisation of rust layers
Mechanistic modelling of atmospheric corrosion of carbon steel in Port-Louis by electrochemical characterisation of rust layers
S235 structural steel was exposed for 14 months at six locations in the marine/urban atmosphere of Port-Louis, distinguished by the surrounding bay and mountains. An unusual geospatial variability in terms of chloride deposition rate (7.8 – 54.3 mg m–2 d–1), SO2 level (1.2 – 2.4 mg m–2 d–1) and corrosion rate (77.6 – 189.2 g m–2 y–1) was observed. Electrochemical techniques, supported by mass loss and surface analysis, provide insights into environment-specific corrosion mechanisms, with the occurrence of anomalous diffusion at the aggressive exposure sites. Rust layer corrosion resistances ranged between 4 and 113 Ω·cm2.
Carbon steel, EIS, X-ray diffraction, Atmospheric corrosion, Rust
Seechurn, Yashwantraj
25b027fb-7a6c-4b86-ba1a-b8cfb9e609f4
Wharton, Julian
965a38fd-d2bc-4a19-a08c-2d4e036aa96b
Surnam, Baboo Y. R.
3ef61dd7-3134-48f9-aa83-dcf2ded0c5f8
Seechurn, Yashwantraj
25b027fb-7a6c-4b86-ba1a-b8cfb9e609f4
Wharton, Julian
965a38fd-d2bc-4a19-a08c-2d4e036aa96b
Surnam, Baboo Y. R.
3ef61dd7-3134-48f9-aa83-dcf2ded0c5f8
Seechurn, Yashwantraj, Wharton, Julian and Surnam, Baboo Y. R.
(2022)
Mechanistic modelling of atmospheric corrosion of carbon steel in Port-Louis by electrochemical characterisation of rust layers.
Materials Chemistry and Physics, 291, [126694].
Abstract
S235 structural steel was exposed for 14 months at six locations in the marine/urban atmosphere of Port-Louis, distinguished by the surrounding bay and mountains. An unusual geospatial variability in terms of chloride deposition rate (7.8 – 54.3 mg m–2 d–1), SO2 level (1.2 – 2.4 mg m–2 d–1) and corrosion rate (77.6 – 189.2 g m–2 y–1) was observed. Electrochemical techniques, supported by mass loss and surface analysis, provide insights into environment-specific corrosion mechanisms, with the occurrence of anomalous diffusion at the aggressive exposure sites. Rust layer corrosion resistances ranged between 4 and 113 Ω·cm2.
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Accepted/In Press date: 20 August 2022
e-pub ahead of print date: 31 August 2022
Keywords:
Carbon steel, EIS, X-ray diffraction, Atmospheric corrosion, Rust
Identifiers
Local EPrints ID: 472437
URI: http://eprints.soton.ac.uk/id/eprint/472437
ISSN: 0254-0584
PURE UUID: 98ec50a9-d46c-4040-b52e-716caa3eae59
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Date deposited: 05 Dec 2022 17:54
Last modified: 17 Mar 2024 02:46
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Contributors
Author:
Yashwantraj Seechurn
Author:
Baboo Y. R. Surnam
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