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08446 High Temperature Oxidation of Heat-Resistant Alloys in Combustion Environments

Picture for 08446 High Temperature Oxidation of Heat-Resistant Alloys in Combustion Environments
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Product Number: 51300-08446-SG
ISBN: 08446 2008 CP
Author: James Rakowski
Publication Date: 2008
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Water vapor is a major component of most combustion gas streams, and has been shown to generally increase the rate of attack of heat-resistant alloys at elevated temperatures. The role of water vapor in causing accelerated oxidation will be reviewed for a variety of alloys, including austenitic stainless steels, ferritic stainless steels, and nickel-base superalloys. A variety of factors will be considered, including environmental variables such as gas composition and temperature, alloy composition, and specimen thickness. Specifically, iron-base alloys are more susceptible to increased degradation in humidified air, with the initial chromium content playing a significant role in the transition from protective to rapid oxidation. Nickel-base alloys were observed to exhibit altered oxidation kinetics, but did not form rapidly growing oxides.
Water vapor is a major component of most combustion gas streams, and has been shown to generally increase the rate of attack of heat-resistant alloys at elevated temperatures. The role of water vapor in causing accelerated oxidation will be reviewed for a variety of alloys, including austenitic stainless steels, ferritic stainless steels, and nickel-base superalloys. A variety of factors will be considered, including environmental variables such as gas composition and temperature, alloy composition, and specimen thickness. Specifically, iron-base alloys are more susceptible to increased degradation in humidified air, with the initial chromium content playing a significant role in the transition from protective to rapid oxidation. Nickel-base alloys were observed to exhibit altered oxidation kinetics, but did not form rapidly growing oxides.
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