On the effect of pre-formed scales in mitigating corrosion of steels in CO2 environments
Zekos, Iasonas and McMeekin, Kristoffer and Stack, Margaret M. (2020) On the effect of pre-formed scales in mitigating corrosion of steels in CO2 environments. Journal of Bio- and Tribo-Corrosion, 6 (2). 56. ISSN 2198-4220 (https://doi.org/10.1007/s40735-020-00347-w)
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Abstract
Chromium (Cr) containing steels were tested to analyse corrosion behaviour in carbon dioxide saturated water of varying salinities with extended exposure time. Both potentiodynamic and mass loss data were collected to gain a better understanding of the corrosion mechanisms. It was found that both the high Cr steels displayed degradation in the form of pitting with increasing salinities. However, the carbon steel reference material showed uniform iron carbonate (FeCO₃) precipitation. The use of high salinity precipitated layers to aid corrosion protection in lower salinity seawater environments was then established as an interesting area for greater examination. Subsequently, samples of the carbon steel previously corroded in solutions of 7, 14 and 28% sodium chloride (NaCl) concentration were then tested in seawater salinities of 3.5% NaCl. It was found that both the 7 and 14% NaCl pre-corroded samples resulted in a significant reduction in the corrosion rate when compared with non-pre-corroded samples. The 7% NaCl pre-corroded sample showed the greatest reduction in corrosion rate, and through SEM analysis of the layer both on the surface and cross-section it was found to display an iron carbonate layer more densely packed and defect free. This indicated the potential benefits of high salinity pre-corrosion techniques to aid protection in seawater salinity environments.
ORCID iDs
Zekos, Iasonas ORCID: https://orcid.org/0000-0002-1940-7877, McMeekin, Kristoffer and Stack, Margaret M. ORCID: https://orcid.org/0000-0001-6535-6014;-
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Item type: Article ID code: 71843 Dates: DateEvent26 March 2020Published10 March 2020Accepted3 July 2019SubmittedSubjects: Technology > Mechanical engineering and machinery Department: Faculty of Engineering > Mechanical and Aerospace Engineering Depositing user: Pure Administrator Date deposited: 23 Mar 2020 11:57 Last modified: 03 Sep 2024 00:58 URI: https://strathprints.strath.ac.uk/id/eprint/71843