Research Progress on Corrosion Behavior of Gaseous CO2 Transportation Pipelines Containing Impurities

Gaseous CO2 transportation pipelines are an important part of carbon capture and storage. Corrosion control of gaseous CO2 transportation pipelines containing impurities is important to the safe operation of pipelines. This paper reviews recent research progress on the corrosion of gaseous CO2 transportation pipelines containing impurities, and the impact factors of gaseous CO2 transportation pipelines are summarized. The influence of pipe impurities and environmental conditions on the mutual solubility of water and CO2, the corrosion behavior of pipelines, the characteristic of corrosion scales, and corrosion mechanism of transportation pipelines are discussed. The determination of critical water content for the corrosion of gaseous CO2 transportation pipelines is analyzed. Predictive corrosion models of gaseous CO2 transportation pipelines are also concluded. For further research on corrosion of gaseous CO2 transportation pipelines containing impurities, the following should be the focal points: the calculation of water and CO2 mutual solubility in gaseous CO2 environments containing impurities, the influence of impurities on corrosion product film characteristics and the corrosion mechanism in a gaseous CO2 environment, the determination of the critical water content of corrosion for gaseous CO2 transportation pipelines containing impurities, and the establishment of inner corrosion prediction models of gaseous CO2 transportation pipelines containing impurities.