Atmospheric Corrosion of Weathering and Mild Steels in the High Salinity Environment of Mauritius.
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| Title: | Atmospheric Corrosion of Weathering and Mild Steels in the High Salinity Environment of Mauritius. |
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| Authors: | Surnam, B. Y. R.1 (AUTHOR) y.surnam@uom.ac.mu, Ma, Xingyu2 (AUTHOR), Pedrazzini, Stella2 (AUTHOR) s.pedrazzini@imperial.ac.uk, Bilsland, Chris2 (AUTHOR) c.bilsland17@imperial.ac.uk, Kootab, Z. S.1 (AUTHOR) |
| Source: | Surface & Interface Analysis: SIA. Aug2025, Vol. 57 Issue 8, p619-629. 11p. |
| Subjects: | Small states, Raman spectroscopy, Industrial sites, Steel, Humidity, Weathering, Carbon steel, Mild steel |
| Abstract: | Weathering steel generally corrodes more slowly than conventional mild steel but are susceptible to conditions that cause high surface wetness. Island nations and coastal states have atmospheric environments (high salinity and humidity) that promote wetness but data on the performance of weathering grades of steel are sparse, restricting their use. Their corrosion behaviour have been rarely studied in small island states. Hence, the aim of this study is to investigate the corrosion rate and the corrosion mechanism of mild steel and weathering steel in the Mauritian atmosphere. The two types of steel were exposed outdoors in Port Louis, a marine industrial site. Samples were removed after an exposure period of 3, 6, 10 and 13 months. Their corrosion loss was determined using the weight loss method. The corrosion products were analysed using Raman spectroscopy, X‐ray diffraction, FTIR and energy dispersive X‐ray spectra to determine the corrosion mechanism. The corrosion loss of weathering steel was found to be 32% lower than that of mild steel. This difference was lower than expected and it was due to the fact that the corrosion mechanism for both carbon steel and weathering steel were similar. The morphology of the rust layer also did not show significant differences. The results are expected to give a better insight into the possibility of the use of weathering steel in Mauritius and in countries with similar environments. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | Weathering steel generally corrodes more slowly than conventional mild steel but are susceptible to conditions that cause high surface wetness. Island nations and coastal states have atmospheric environments (high salinity and humidity) that promote wetness but data on the performance of weathering grades of steel are sparse, restricting their use. Their corrosion behaviour have been rarely studied in small island states. Hence, the aim of this study is to investigate the corrosion rate and the corrosion mechanism of mild steel and weathering steel in the Mauritian atmosphere. The two types of steel were exposed outdoors in Port Louis, a marine industrial site. Samples were removed after an exposure period of 3, 6, 10 and 13 months. Their corrosion loss was determined using the weight loss method. The corrosion products were analysed using Raman spectroscopy, X‐ray diffraction, FTIR and energy dispersive X‐ray spectra to determine the corrosion mechanism. The corrosion loss of weathering steel was found to be 32% lower than that of mild steel. This difference was lower than expected and it was due to the fact that the corrosion mechanism for both carbon steel and weathering steel were similar. The morphology of the rust layer also did not show significant differences. The results are expected to give a better insight into the possibility of the use of weathering steel in Mauritius and in countries with similar environments. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 01422421 |
| DOI: | 10.1002/sia.7413 |
