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Mechanism of breakaway oxidation of Fe–Cr and Fe–Cr–Ni alloys in dry and wet carbon dioxide

Gheno, Thomas and Monceau, Daniel and Young, David J. Mechanism of breakaway oxidation of Fe–Cr and Fe–Cr–Ni alloys in dry and wet carbon dioxide. (2012) Corrosion Science, 64. 222-233. ISSN 0010-938X

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Official URL: https://doi.org/10.1016/j.corsci.2012.07.024

Abstract

Model Fe–Cr and Fe–Cr–Ni alloys were exposed to Ar–CO2 and Ar–CO2–H2O gas mixtures at 650°C. While all alloys initially formed protective Cr2O3 scales, nucleation and growth of iron-rich oxide nodules resulted in some cases in breakaway oxidation. The conditions leading to departure from the protective stage are discussed in terms of Cr2O3 thermodynamic and kinetic stability. The morphological and compositional evolutions accompanying nodule development were examined. The influence of carbide precipitation on alloy chromium diffusion and the ability of the alloy to form and maintain Cr-rich oxide layers was investigated.

Item Type:Article
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Other partners > University of New South Wales - UNSW (AUSTRALIA)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
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Deposited By: Yves MOMBOISSE
Deposited On:28 May 2019 07:42

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