Coordination of Pre-oxidation Time and Temperature for a Better Corrosion Resistance to CO2 at 550 °C
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Influence of pre-oxidation treatment on the oxidation resistance of F91 to CO2 at 550 °C was investigated. The formation of the thin scale of (Fe, Cr)2O3 corundum-type oxides was achieved by pre-oxidation in air, which significantly improved the oxidation resistance. Nodule nucleation and subsequent growth were analyzed and interpreted. Influences of pre-oxidation temperature and time on the oxidation resistance to CO2 are explained by presenting concepts of insufficient pre-oxidation and excess pre-oxidation. A coordination between pre-oxidation temperature and time is proposed.
KeywordsPre-oxidation Carbon dioxide 9Cr steel Nodule growth
This work was supported by Tsinghua University Initiative Scientific Research Program and the National Magnetic Confinement Fusion Energy Research Project of China [2015GB118001]. Yu Zheng thanks the CSC for the financial support  to visit University of Pittsburgh.
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