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Model Fe–Cr and Fe–Cr–Ni alloys were reacted in Ar–CO 2 and Ar–CO 2 –H 2 O gas mixtures at 650°C. Initially protective oxidation, due to Cr 2 O 3 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...
Model Fe–Cr and Fe–Cr–Ni alloys were exposed to Ar–CO 2 and Ar–CO 2 –H 2 O gas mixtures at 650°C. While all alloys initially formed protective Cr 2 O 3 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 Cr 2 O ...
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