The work presents an analysis of the oxidation rate of Crofer 22APU steel intended for the construction of inter-connectors in solid oxide fuel cells. Tests were conducted on two different samples of Crofer 22APU steel: pre-oxidized and unoxidized ones. Kinetic studies were carried out within the temperature range of fuel cells operation (873-1,173 K) in atmospheres with a varying nSO 2 content in the air (where n = 0.1%, 1%, and 10%), as well as in pure air.