| Abstract Scope |
Carbon capture and storage (CCS) is a promising technology that can retain the core value of fossil fuel power plants while significantly reduce CO2 emissions. As an essential part of CCS, CO2 transportation is achieved by pipeline network since it could transport large amounts of CO2 in a relatively cost-effective and safe fashion. However, the unavoidable impurities in the transported s-CO2 stream may cause severe corrosion and threaten the pipeline integrity. Cr-bearing steels are believed to improve corrosion resistance, yet little work has been carried out. In this paper, corrosion studies of carbon steels and Cr-containing steels in supercritical CO2 streams with impurities are conducted at 10 MPa and 45 oC. The morphology and chemical composition of the formed surface corrosion products are characterized by optical images, X-ray diffraction and SEM. Besides, the effect of Cr addition on corrosion behavior of steel is discussed. |