Journal
CORROSION SCIENCE
Volume 53, Issue 9, Pages 2815-2825Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2011.05.018
Keywords
Superalloys; Aluminium; Kinetic parameters; Oxidation; Oxide coatings
Funding
- Australian Commonwealth Scientific and Industrial Research Organisation (CSIRO)
- Australian Research Council
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The oxidation behaviour of ternary NixFeyCoz alloys (where x/y (wt) = 1 and 1.85: z = 0, 10, 30 and 50 wt.%) was studied in air at 800 degrees C. Alloys were found to follow complex oxidation kinetics, with the highest oxidation rates observed for alloys having 50 wt.% Co. Significant improvements in oxidation resistance were achieved by addition of 10 and 30 wt.% Co to the Ni-Fe system. The decrease in oxidation rate was associated with suppression of Fe2O3 formation in preference for (Co,Ni)(x)Fe3-xO4 growth. The results were discussed in light of the materials requirements for inert anodes for aluminium electrolysis. (C) 2011 Elsevier Ltd. All rights reserved.
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