Work

Transition from Internal to External Oxidation in Binary Fe–Cr Alloys Around 900 °C

Year: 2024

Type: article

Abstract: The transition from external to internal oxidation of a binary Fe-10Cr alloy has been investigated in Fe/FeO Rhines pack (RP) and H2/H2O between 850 and 900°C. Internal oxidation is facilitated by increasing temperature and presence of water vapor. A classical Wagnerian diffusion analysis predicts external oxidation for ferritic (BCC) Fe-10Cr and internal oxidation for austenitic (FCC) Fe-10Cr. The a-to-g transformation is demonstrated to be the primary factor promoting internal oxidation in Fe-Cr around 900°C. Water vapor is believed to promote internal oxidation due to a higher reactivity of H2O compared to O2 and higher preferential adsorption of the H2O molecule.

Source: High Temperature Corrosion of Materials

DOI: 10.1007/s11085-024-10322-2

Authors: A. Chyrkin, J. Froitzheim, W. J. Quadakkers

Institutions: Chalmers University of Technology, Forschungszentrum Jülich

Language: English

Topic: High-Temperature Coating Behaviors

Subfield: Aerospace Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,890

Funders: European Commission, Chalmers Tekniska Högskola, Nordic Energy Research