High temperature oxidation of Fe–Ni-base alloy HR120 and Ni-base alloy HAYNES 282 in steam

Abstract

High temperature oxidation of Fe–Ni-base alloy HR120 and Ni-base alloy HAYNES 282 in steam at 800–1000 °C was investigated and compared. Results show that the oxidation kinetics of HAYNES 282 and HR120 followed a parabolic law. Temperature affected the stability of formed chromia, leading to the observation of (Fe, Cr)₂O₃, Fe₂NiO₄ on the surface of Fe–Ni-base alloy, which is not the case for Ni-base alloy. The strengthening element titanium accelerated the growth of chromia formed on the Ni-base alloy. It is concluded that the resistance of high temperature oxidation of HR120 is superior to HAYNES 282.

Keywords:

• Alloy
• SEM
• oxidation