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Understanding the Anomalous Corrosion Behaviour of 17% Chromium Martensitic Stainless Steel in Laboratory CCS-Environment—A Descriptive Approach

Author

Listed:
  • Anja Pfennig

    (Department of Engineering and Life Sciences, University of Applied Science—HTW Berlin, 12459 Berlin, Germany)

  • Axel Kranzmann

    (BAM Federal Institute of Materials Research and Testing, 12205 Berlin, Germany)

Abstract

To mitigate carbon dioxide emissions CO 2 is compressed and sequestrated into deep geological layers (Carbon Capture and Storage CCS). The corrosion of injection pipe steels is induced when the metal is in contact with CO 2 and at the same time the geological saline formation water. Stainless steels X35CrMo17 and X5CrNiCuNb16-4 with approximately 17% Cr show potential as injection pipes to engineer the Northern German Basin geological onshore CCS-site. Static laboratory experiments (T = 60 °C, p = 100 bar, 700–8000 h exposure time, aquifer water, CO 2 -flow rate of 9 L/h) were conducted to evaluate corrosion kinetics. The anomalous surface corrosion phenomena were found to be independent of heat treatment prior to exposure. The corrosion process is described as a function of the atmosphere and diffusion process of ionic species to explain the precipitation mechanism and better estimate the reliability of these particular steels in a downhole CCS environment.

Suggested Citation

  • Anja Pfennig & Axel Kranzmann, 2022. "Understanding the Anomalous Corrosion Behaviour of 17% Chromium Martensitic Stainless Steel in Laboratory CCS-Environment—A Descriptive Approach," Clean Technol., MDPI, vol. 4(2), pages 1-19, March.
    • Handle: RePEc:gam:jcltec:v:4:y:2022:i:2:p:14-257:d:778983
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