期刊
CORROSION SCIENCE
卷 192, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2021.109801
关键词
Stainless steel; SEM; Corrosion; High temperature oxidation; Carburization
资金
- International Cooperration in Science and Technology of China [2018YFE0116200]
- Youth Funds of Nuclear Power Institute of China [06-2001]
- China National Nuclear Corporation (CNNC) Science Fund for Talented Young Scholars
- National key R D Program
The corrosion behaviors of T91 and 316 materials were studied under supercritical carbon dioxide environment, revealing different corrosion products and mechanisms.
Aiming at corrosion issues of structural materials in supercritical carbon dioxide Brayton systems, the corrosion behaviors of T91 and 316 were studied under S-CO2 at 500 degrees C, 600 degrees Cand 20 MPa. The corrosion kinetics conform to the parabolic law. The corrosion products of T91 are mainly composed of outer columnar Fe3O4 and inner FeCr spinel, which had porous structure and no protective effect for further corrosion. Thin and dense Cr2O3 formed on the 316 surface after 500 degrees Ccorrosion.While large numbers of Fe-oxide nodules formed on surface of Cr-rich scale at 600 degrees C. The corrosion mechanism was discussed.
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