Steam oxidation resistance and performance of newly developed coatings for Haynes ® 282 ® Ni-based alloy

Abstract Steam oxidation test was carried out at 800 °C for 2000 h on nine plasma sprayed coatings on gamma-prime (γ’) strengthened Haynes ® 282 ® Ni-based alloy. The lowest oxidation kinetics and extensive reduction in internal oxidation process was observed in the sample coated with nano CeO 2 with no bond coat. This is due to the oxygen deficiency in CeO x that facilitates the inward movement of oxygen arising from the presence of Ce 3+ oxidation state and ensures the quick formation of protective, impermeable and adherent layer of Cr 2 O 3 .