Corrosion protection characteristics of doped magnetite layers on carbon steel surfaces in aqueous CO2 environments

Magnetite (Fe3O4) corrosion product surface layers can limit uniform corrosion rates of carbon steel in aqueous carbon dioxide (CO2)-saturated environments. However, as Fe3O4 is a semiconductor, localised corrosion can proceed due to galvanic interaction between the Fe3O4 layers and bare steel. In t...

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Bibliographic Details
Published inJournal of Pipeline Science and Engineering Vol. 4; no. 4; p. 100199
Main Authors Owen, Joshua, Ropital, Francois, Joshi, Gaurav R., Kittel, Jean, Barker, Richard
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.12.2024
KeAi Communications Co. Ltd
Subjects
Carbon steel
CO2 corrosion
Electrochemical impedance spectroscopy
Electrodeposition
Localised corrosion
Magnetite
Localised corrosion
Electrodeposition
Carbon steel
Magnetite
CO2 corrosion
Electrochemical impedance spectroscopy
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Summary:Magnetite (Fe3O4) corrosion product surface layers can limit uniform corrosion rates of carbon steel in aqueous carbon dioxide (CO2)-saturated environments. However, as Fe3O4 is a semiconductor, localised corrosion can proceed due to galvanic interaction between the Fe3O4 layers and bare steel. In this study, metal dopants were integrated into Fe3O4 layers to mitigate the effects of localised corrosion, whilst maintaining its protective barrier properties. Model Fe3O4 and metal-doped Fe3O4 layers were electrodeposited on carbon steel and immersed in a pH 5, 1 wt% sodium chloride (NaCl), CO2-saturated, 50 °C solution. Under the conditions studied, the incorporation of magnesium into the Fe3O4 layer resulted in reduced localised corrosion when the 3D surface profiles of the underlying carbon steel were measured using white light interferometry.
ISSN:2667-1433
2667-1433
DOI:10.1016/j.jpse.2024.100199