High-temperature oxidation behaviour of B2 FeAl based alloy with Cr, Zr and B additions

► The kinetics of oxidation in the air of FeAlCrZrB aluminide has been described based on a parabolic rate law. ► At temperatures below 900 °C a mixture of γ and θ type oxides grew slowly. ► A stable alumina formation beginning was observed at 900 °C. ► The activation energies for oxides growth are 184 kJ mol−1 above 900 °C and 345 kJ mol−1 below 900 °C. ► The thermal stresses occurring during cooling from 1100 °C are the reason for the oxide scale exfoliation.