304L stainless steel oxidation in carbon dioxide: An XPS study
Résumé
From the early beginning of the oxidation of 304L stainless steel in carbon dioxide at 1273K (1 min, for a weight gain of 0.02mgcm−2), the surface of the alloy was entirely covered by oxides: magnetite Fe3O4, chromia Cr2O3 and traces of wüstite Fe1−xO. Later on, for weight gains approaching 1mg cm−2, magnetite remained at the outer interface, with traces of hematite (Fe2O3), above a thick layer of wüstite Fe1−xO. Magnetite and wüstite may favour adhesion of thermal plasma protective coatings such as alumina.