Investigation of Pipeline Corrosion in Pressurized CO2 Containing Impurities

AbstractTransmission of captured CO2 in pipelines is an essential part of the carbon capture and sequestration process chain. Dependent of the fuel, the combustion process and the capture technology the resulting gas contains impurities that might cause corrosion effects in pipelines constructed of low alloyed steels. Corrosion testing under simulated conditions therefore is a prerequisite for the installation of reliable and safe CCS systems. Sulfur and nitrogen oxides together with water vapor form corrosive acids. Their behaviours and corrosive effects in static pressurized experiments were critically investigated in the present study. The results indicate that experimental limitations might influence the predictive capability of corrosion tests with sulfur dioxide. The limited supply of corrosive constituents in static test might lead to an underestimation of the corrosion risk