Internal Oxidation of a Fe-Cr Binary Alloy at 700-900 degrees C: The Role of Hydrogen and Water Vapor
Artikel i vetenskaplig tidskrift, 2022

Internal oxidation of Fe-2.25Cr has been studied in Fe/FeO Rhines pack (RP) and H-2/H2O gas mixtures at 700-900 degrees C. A novel exposure technique allowing RP experiments in dual atmosphere conditions was developed. No measurable effect of hydrogen on lattice oxygen permeability in ferrite could be detected: neither in single nor in dual atmosphere conditions. The H-2/H2O atmosphere was found to induce stronger oxidation attack at alloy grain boundaries resulting in a morphology similar to intergranular stress corrosion cracking often reported in nuclear technology. The intergranular oxidation attack was demonstrated to be independent of the dual atmosphere effect, i.e., hydrogen dissolved in the alloy.

Internal oxidation

Oxygen permeability

Dual atmosphere effect

Intergranular oxidation attack

Hydrogen

SOFC

Författare

Anton Chyrkin

Chalmers, Kemi och kemiteknik, Energi och material

Camilla Cossu

Chalmers, Kemi och kemiteknik, Energi och material

Jan-Erik Svensson

Chalmers, Kemi och kemiteknik, Energi och material

Jan Froitzheim

Chalmers, Kemi och kemiteknik, Energi och material

Oxidation of Metals

0030-770X (ISSN) 1573-4889 (eISSN)

Vol. 98 3-4 273-289

Ämneskategorier

Metallurgi och metalliska material

Korrosionsteknik

DOI

10.1007/s11085-022-10121-7

Mer information

Senast uppdaterat

2022-09-28