Effect of rare earth elements on high temperature oxidation behaviour of austenitic steel

• Published in: Corrosion science 2020-03, Vol.164, p.108359, Article 108359
• Main Authors: Zheng, Zhibin, Wang, Shuai, Long, Jun, Wang, Juan, Zheng, Kaihong
• Format: Article
• Language: English
• Subjects: A. Rare earth elements; A. Superalloys; Austenitic stainless steels; B. XPS; C. High temperature corrosion; C. Oxidation; High temperature; Manganese dioxide; Oxidation; Oxidation resistance; Rare earth elements; Reaction kinetics; Surface analysis (chemical); Trace elements; Yttrium
• ISSN: 0010-938X; 1879-0496
• DOI: 10.1016/j.corsci.2019.108359

•Oxidation behavior of steel containing rare earth elements at 1000 °C was studied.•The addition of rare earth element improved the oxidation resistance of steel.•The oxidation resistance of steel with both Y and Ce was poor.•MnO2 is beneficial to the high temperature oxidation resistance of the steel. The oxidation behaviour of K-52 austenitic steel with rare earth elements investigated at 1000 °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.