Session: Material Selection and Qualification in CCS Downhole Environment (Part I of II)
Performance of Thermal Spray Coatings in Supercritical CO2 (C2026-00057)
Thursday, March 19, 2026
11:00 AM - 11:30 AM Central
Location: 342 DE
Earn .5 PDH
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This paper reports the performance of thermally sprayed coatings in an aqueous solution pressurized with 10 MPa supercritical CO2 at 40°C. Carbon steel substrate with thermal spray coatings was prepared, and the specimens were exposed to 3.5 wt.% NaCl solution pressurised with 10 MPa CO2. The specimens were taken out after 168h and post-test examination was carried out. Post-test visual examination indicates no significant signs of damage to the coating which was confirmed by microstructural characterization. The micrographs indicated promising behaviour of coatings with no significant corrosion was seen at the Coating-steel interface. However, one must note that the test was carried out for 168 h and such short-term test seldom give long-term corrosion performance. Nonetheless, the initial results look interesting and provide some indication of the coatings promise for protection of steel against CO2corrosion. Further work is required to explore the efficacy of such coatings in carbon capture and storage (CCS) applications.
