Assessment of the Risk of SCC of Pipelines Transporting CO2 in Presence of CO Contamination

Abstract In carbon capture applications, the transport of CO2 in pipeline raises many questions on the material integrity, particularly linked to the level of contaminants in the steam. A project is ongoing to address the effect of CO contamination on the risk of stress corrosion cracking. In a first approach, this can be made through high-pressure electrochemical screening to tackle the conditions where a risk of cracking should be considered. The results demonstrate that CO, at levels of contamination that can be observed in real fields, modifies the electrochemical behavior of the steel and can indeed generate environmental conditions conducive to stress corrosion cracking suggesting that CO acts like a corrosion inhibitor.