Journal
CORROSION SCIENCE
Volume 164, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2019.108359
Keywords
Superalloys; Rare earth elements; XPS; Oxidation; High temperature corrosion
Funding
- GDAS' Project of Science and Technology Development [2018GDASCX-0117, 2017GDASCX0117]
- Science and Technology Planning Project of Guangdong Province [2018A050506055, 2017A070701029, 2017A050503004]
- Science and Technology Planning Project of Guangzhou [201907010026]
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The oxidation behaviour of K-52 austenitic steel with rare earth elements investigated at 1000 degrees C for up to 150 h. The oxidation kinetics indicated that the addition of the rare earth elements Y or Ce improved the oxidation resistance of steel. However, the simultaneous addition of Y and Ce decreased the oxidation resistance. The oxidation films forming at different stages were evaluated in detail using surface analysis methods. The improved oxidation resistance primarily resulted from the formation of a complete spinel structure, the inner oxidation of silicon and the existence of MnO2 in the Mn-rich zone.
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