Work

Effect of hydrogen on oxidation of Fe-20Cr-(1Si, 2Mn or 2Al) alloys in water vapour at 650 °C

Year: 2025

Type: article

Abstract: Hydrogen production and utilisation involve H2O(g) at high temperatures. However, the effect of hydrogen on chromia-forming heat resistant alloys in H2O is still unclear. In this work, Fe-20Cr and Fe-20Cr-(1Si, 2Mn or 2Al) (wt%) were exposed in Ar-xH2-10H2O gases (x = 2, 10 and 20 vol%) at 650°C for up to 310 hours. The binary alloy experienced breakaway oxidation in all gases. Increasing hydrogen content reduced corrosion rates and altered oxide morphologies. Adding Mn, Al or Si to the alloy suppressed oxidation to some extent. The effects of both hydrogen and alloying on the diffusion processes supporting oxidation are discussed.

Source: Corrosion Science

DOI: 10.1016/j.corsci.2025.112932

Authors: Jiarui Chen, Jianqiang Zhang, David J. Young

Institution: UNSW Sydney

Language: English

Topic: High-Temperature Coating Behaviors

Subfield: Aerospace Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $4,070

Funder: Australian Research Council