As a promising technology, carbon capture and storage (CCS) can significantly reduce CO2 emissions while retaining the core value of fossil fuel power plants. CO2 transportation is a crucial step to ensure the successful deployment of CCS, which is achieved by pipeline network. However, the impurities in the captured supercritical CO2 (s-CO2) may cause severe corrosion damages to pipeline steels. As a control strategy, Cr-bearing steels are proposed as potential candidate materials to mitigate corrosion, especially at the crucial parts of the transportation system. In this paper, corrosion behaviors of steels with different Cr contents were studied in s-CO2 streams with impurities (H2O, SO2, O2, etc.) at 10 MPa and 45°C. The corrosion rates were measured by mass loss method and the corrosion products were characterized. The effect of Cr on corrosion behavor of steels was also discussed.

Subject
Steel surfaces, Water, Corrosion rate, Materials performance, Mass loss, Autoclaves, Pipelines, Corrosion products, Impurities, Transportation, Steel, Corrosion resistance, Types of corrosion
Keywords:
supercritical carbon dioxide, corrosion, Cr-bearing steels
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2022
Association for Materials Protection and Performance (AMPP)
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