Corrosion of Pipelines in Supercritical CO₂ Environment during Carbon Sequestration

Carbon capture and storage (CCS) technology is crucial for reducing global CO₂ emissions and represents an essential pathway for achieving long-term green and low-carbon development in China. However, during CCS operations, pipelines and injection wells are exposed to supercritical CO₂ (SC-CO₂) environments, leading to severe corrosion issues. Effectively mitigating this corrosion has become an urgent challenge. This review summarizes recent research progress on the corrosion of pipeline equipment in SC-CO₂ environments, with a focus on the influence of various factors such as water content, salinity, temperature, pressure, flow velocity, and pipe material on corrosion rates and corrosion products. Additionally, corrosion protection methods suitable for SC-CO₂ conditions are discussed.