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Kinetics 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. Kinetics of breakaway oxidation of Fe–Cr and Fe–Cr–Ni alloys in dry and wet carbon dioxide. (2013) Corrosion Science, 77. 246-256. ISSN 0010-938X

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Official URL: https://doi.org/10.1016/j.corsci.2013.08.008

Abstract

Model Fe–Cr and Fe–Cr–Ni alloys were reacted in Ar–CO2 and Ar–CO2–H2O gas mixtures at 650°C. Initially protective oxidation, due to Cr2O3 formation, was usually followed by a transition to rapid oxidation, associated with Fe-rich oxide nodule development. Nodule surface coverage and overall weight gains are modelled on the basis of continued nucleation of nodules, and their diffusion-controlled growth. In general, water vapour accelerated nucleation. Alloying with nickel decreased average nucleation rates, but austenitic alloys showed large variations in nucleation susceptibility with grain orientation. Slower nodule growth induced by high chromium and nickel levels counteracted the effects of frequent nucleation.

Item Type:Article
Additional Information:Yves
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 07:17

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