About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Steels in Extreme Environments
|
| Presentation Title |
Steel Corrosion in Supercritical CO2-Saturated Aqueous Environments |
| Author(s) |
Jing Liu |
| On-Site Speaker (Planned) |
Jing Liu |
| Abstract Scope |
CCUS operations are conducted under supercritical CO2 (s-CO2) conditions at temperatures ranging from 35–120 °C and pressures between 8–17 MPa. Corrosion poses a significant safety challenge throughout the CCUS chain, especially when water is present in the s-CO2 stream and steel infrastructure is utilized.
This work provides an overview of our recent progress in steel corrosion in s-CO2-saturated aqueous environments. Our research examines the effects of chloride ions, temperature variations (50–100 °C), exposure durations (1–1,000 hours), and chromium content (0 to 16 wt.%) on the corrosion behavior of steels. To elucidate the governing mechanisms and corrosion kinetics, we conducted extensive corrosion tests. Key findings confirm that in s-CO2-saturated aqueous phase, corrosion is primarily driven by electrochemical reactions. The formation of a protective corrosion layer on the steel surface is critical for controlling the corrosion process. Furthermore, the aqueous chemistry significantly influences the composition and quality of the corrosion product layer. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Sustainability, Other |