Improvement of nonisothermal oxidation behavior of Fe and Fe-Cr alloys by superficially applied reactive oxide coatings. [Fe-6. 3%Cr, Fe-15. 9%Cr, Fe-20%Cr, Fe-25%Cr]
- Regional Engineering College, Durgapur (India)
- Indian Institute of Technology, Kharagpur (India)
The nonisothermal oxidation behavior of pure iron and a few iron-chromium alloys in dry air has been studied. The effects of a superficial coating of a reactive oxide, CeO{sub 2}, on the oxidation behavior were studied. Linear heating rates of 3 K/min and 6 K/min were maintained up to a final temperature ranging from 1,273-1,473 K. Coatings were applied either from a slurry or an aqueous bath. The CeO{sub 2} coating has been found to be effective not only in decreasing the nonisothermal oxidation rate but also in improving the scale adherence. Moreover, the coated samples withstood a number of heating cycles without scale rupture. The mass gain of the samples as a function of temperature was recorded by means of a sensitive balance, and the scales have been characterized by SEM, EPMA, and x-ray diffraction analysis.
- OSTI ID:
- 5481775
- Journal Information:
- Oxidation of Metals; (United States), Vol. 34:1-2; ISSN 0030-770X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CERIUM OXIDES
METALLURGICAL EFFECTS
CHROMIUM ALLOYS
OXIDATION
IRON
IRON BASE ALLOYS
CHEMICAL COMPOSITION
CHEMICAL REACTION KINETICS
ELECTRON MICROPROBE ANALYSIS
HEATING RATE
PROTECTIVE COATINGS
SCANNING ELECTRON MICROSCOPY
TEMPERATURE EFFECTS
THERMAL CYCLING
VERY HIGH TEMPERATURE
WEIGHT MEASUREMENT
X-RAY DIFFRACTION
ALLOYS
CERIUM COMPOUNDS
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
COATINGS
COHERENT SCATTERING
DIFFRACTION
ELECTRON MICROSCOPY
ELEMENTS
IRON ALLOYS
KINETICS
METALS
MICROANALYSIS
MICROSCOPY
NONDESTRUCTIVE ANALYSIS
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
REACTION KINETICS
SCATTERING
TRANSITION ELEMENTS
360105* - Metals & Alloys- Corrosion & Erosion