Intermediate temperature corrosion behaviour of Fe-12Cr-6Al-2Mo-0.2Si-0.03Y alloy (C26M) at 300–600 °C

Journal Article · Thu May 30 00:00:00 EDT 2019 · Corrosion Science

DOI:https://doi.org/10.1016/j.corsci.2019.05.029· OSTI ID:1558984

Li, Nan  ^[1]; Parker, Stephen Scott  ^[1]; Saleh, Tarik A.  ^[1]; Maloy, Stuart Andrew  ^[1]; Nelson, Andrew T. ^[2]

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1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Iron-chromium-aluminium alloys are of interest to the nuclear materials community due to their resistance to high temperature steam oxidation and good mechanical properties under irradiation. The present work investigates oxide formation on Fe-12Cr-6Al-2Mo-0.2Si-0.03Y alloy at temperatures relevant to light water reactor cladding operation following extended aging to assess growth kinetics, chemical composition, and oxide microstructure. Oxide growth follows a logarithmic time dependence. Here, when the oxidization temperature is 400 °C or below, the oxide is amorphous. At 500 °C or above, crystalline α-Al₂O₃ oxide film develops and the correlated logarithmic rate constant decreases significantly, indicating enhanced oxidation resistance of the formed oxide film.

• Research Organization: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE Office of Nuclear Energy (NE)
• Grant/Contract Number: 89233218CNA000001
• OSTI ID: 1558984
• Alternate ID(s): OSTI ID: 1543340
• Report Number(s): LA-UR-19-27409; TRN: US2000274
• Journal Information: Corrosion Science, Vol. 157; ISSN 0010-938X
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
α-Al2O3 oxide film
Amorphous oxide
Mo segregation
Logarithmic time dependence