Oxidation of pure Fe and pure Cr as well as Fe-Cr alloys is modelled by considering diffusion in the oxides and the metals. The project is a part of the "CROX" programme which is a collaboration with several groups at Chalmers where experimental investigations and ab-initio calculations are performed.
Diffusion of Fe, Cr and O in wustite, magnetite and hematite is modelled by taking into account the detailed defect structure of the oxides. Grain-boundary and bulk diffusion in the oxides are considered as processes coupled in parallel. The models are being implemented in the DICTRA code allowing simulation of oxidation of FeCr alloys.