The effect of chemical species on the electrochemical reactions and corrosion product layer of carbon steel in CO2 aqueous environment: A review

• Published in: Materials and corrosion Vol. 72; no. 7; pp. 1152 - 1167
• Main Authors: Basilico, Edoardo, Marcelin, Sabrina, Mingant, Remy, Kittel, Jean, Fregonese, Marion, Ropital, Francois
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley Subscription Services, Inc 01.07.2021
• Subjects: Aqueous environments; Carbon dioxide; Carbon sequestration; Carbon steel; Carbon steels; Carbonates; Chemical effects; Chemical reactions; chlorides; CO2 corrosion; contamination; Corrosion; Corrosion effects; Corrosion products; Corrosion rate; Gas mixtures; oxygen; Underground corrosion
• ISSN: 0947-5117; 1521-4176
• DOI: 10.1002/maco.202012118

This study summarizes the chemical effects that can occur during the corrosion process of carbon steel in a CO2‐saturated aqueous environment. Particularly, it focuses more on the results that small chemical contaminations in the environment have on the corrosion process. Underground waters present complex chemistry with several different dissolved ions (chlorides, carbonates) even in high concentrations that impact substantially the corrosion rates of these materials. Moreover, gas impurities present in the gas mixture, such as oxygen in carbon capture and storage applications, constitute a supplementary form of significant contamination in the CO2‐saturated aqueous environment. In particular, the effect on both electrochemical reactions and corrosion product layer is examined for several chemical species that are commonly present either in the gas mixture or in underground waters. This study summarizes the chemical effects that can occur during the corrosion process of carbon steel in a CO2‐saturated aqueous environment. It focuses more on the results that small chemical contaminations in the environment have on the corrosion process. In particular, the effect on both electrochemical reactions and corrosion product layer is examined for several chemical species that are commonly present either in the gas mixture or in underground waters.