1. Breakaway oxidation behaviour of ferritic stainless steels at 1150 °C in humid air.
- Author
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Cheng, Xiawei, Jiang, Zhengyi, Monaghan, Brian J., Wei, Dongbin, Longbottom, Raymond J., Zhao, Jingwei, Peng, Jianguo, Luo, Ming, Ma, Li, Luo, Shuzheng, and Jiang, Laizhu
- Subjects
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FERRITIC steel , *OXIDATION , *HUMIDITY , *SURFACE roughness , *MICROSTRUCTURE - Abstract
The breakaway oxidation behaviour of ferritic stainless steels 430, 443 and 445 has been investigated at 1150 °C in humid air. The oxidation kinetics exhibited significant differences among the three ferritic stainless steels. A uniform and steady growing oxide scale was developed on the 430 steel with an even steel/oxide interface. Local breakdown of the initially protective oxide scale occurred and oxide nodules were developed on the 443 and 445 stainless steels, resulting in irregular and rough steel/oxide interfaces. The breakaway oxidation behaviour was significantly influenced by the microstructure and the composition of the oxide scale. The Mn-Cr spinel oxide formed on top of the Cr 2 O 3 scale in Mo alloying 445 steel can greatly minimise the Cr depletion. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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