Transition from Internal to External Oxidation in Binary Fe–Cr Alloys Around 900 °C
Artikel i vetenskaplig tidskrift, 2025

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 α-to-γ 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.

Water vapor

Rhines pack

Fe-Cr

Ferrite

Austenite

Internal oxidation

Författare

Anton Chyrkin

Chalmers, Kemi och kemiteknik, Energi och material

Jan Froitzheim

Chalmers, Kemi och kemiteknik, Energi och material

W. J. Quadakkers

Forschungszentrum Jülich

Publicerad i

High Temperature Corrosion of Materials

27318400 (eISSN)

Vol. 102 Nummer/häfte 1 s. 1-22 art. nr 112339

Kategorisering

Ämneskategorier (SSIF 2011)

Oorganisk kemi

Identifikatorer

DOI

10.1007/s11085-024-10322-2

Mer information

Senast uppdaterat

2024-12-16