Corrosion and Cracking of CRAs Under CCUS Conditions

Carbon capture and sequestration (CCUS) is essential for reducing greenhouse gas emissions. A critical challenge in CCUS is transporting carbon dioxide (CO2) via pipelines while mitigating corrosion and cracking risks caused by impurities such as water (H2O), sulfur dioxide (SO2), nitrogen dioxide (NO2), oxygen (O2), and hydrogen sulfide (H2S).1 This study evaluates the performance of 316L, 22Cr, S13Cr-110, 6Mo stainless steels, and 625 nickel alloy under these conditions. Oxygen presence significantly influences corrosion, particularly at the H2O/CO2 interface.2 High-PREN (Pitting Resistance Equivalent Number) materials like 6Mo, 22Cr DSS, and Alloy 625 demonstrate superior resistance, making them preferable choices for CO2 transport applications.