Journal
CORROSION SCIENCE
Volume 100, Issue -, Pages 311-321Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2015.08.007
Keywords
Aluminum; Stainless steel; Raman spectroscopy; Oxidation
Funding
- National Key Technology R&D Program of China [2012BAE04B02]
- Jiangsu Cooperative Innovation Fund-the major innovation carrier construction of Shanghai University Xinghua Institute of Special Stainless Steels [BY2013089]
- China Postdoctoral Science Foundation [2014M561457]
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Improved oxidation resistance of 15 wt.% Cr ferritic stainless steels at 1000 degrees C in air has been obtained. Weight gain per unit area is in parabolic relation to oxidation time and parabolic rate constant significantly decreases with increased Al content. Diffusion of Al is enhanced and the porous Cr2O3 rich outer layer is replaced by a more compact Al2O3 rich outer layer in steels with higher Al contents. The appearance of continuous and compact Al2O3 oxide scale contributes to the significantly improved oxidation resistance property and the oxidation mechanism has been suggested based on microstructural observations. (C) 2015 Elsevier Ltd. All rights reserved.
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