Abstract
The high temperature oxidation behavior of medium chromium ferritic stainless steels containing different contents of alloying elements, cerium (Ce) and tungsten (W) was explored at 1200 ºC for 2 h in air. Under this oxidation condition, breakaway oxidation did not occur in all the specimens. A multilayer oxide film formed on all of the four steels, showing spinel oxide (Cr, Mn)3O4 on top of the Cr2O3 layer. A discontinuous SiO2 layer existed at oxide/metal interface. The top layer Cr-Mn spinel oxide exerts significant influence on the oxidation behavior of Fe-Cr alloys. The addition of cerium and tungsten has little influence on the oxidation behavior of ferritic stainless steels.
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