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10198 Oxidation Behavior of Alumina-Forming Alloys in CO2-H2O Environment

Picture for 10198 Oxidation Behavior of Alumina-Forming Alloys in CO2-H2O Environment
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Product Number: 51300-10198-SG
ISBN: 10198 2010 CP
Author: Bruce A. Pint and Ian G. Wright
Publication Date: 2010
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The oxidation behavior of wrought and dispersion-strengthened alumina-forming FeCrAl and Fe-Al alloys was evaluated in a CO2-H2O atmosphere at 1100°C. This environment simulates a potential future high temperature oxy-fired superheater condition. Alumina-forming alloys typically perform better than chromia-forming alloys in the presence of water vapor and high carbon activities at high temperature. However, under these conditions, a significant increase in scale exfoliation and oxidation rate was observed compared to similar exposures in ambient air. Additional characterization is needed to understand these observations.

Keywords: Oxy-fired boilers, alumina-forming alloys, oxide dispersion strengthened alloys, scale spallation, CO2, H2O
The oxidation behavior of wrought and dispersion-strengthened alumina-forming FeCrAl and Fe-Al alloys was evaluated in a CO2-H2O atmosphere at 1100°C. This environment simulates a potential future high temperature oxy-fired superheater condition. Alumina-forming alloys typically perform better than chromia-forming alloys in the presence of water vapor and high carbon activities at high temperature. However, under these conditions, a significant increase in scale exfoliation and oxidation rate was observed compared to similar exposures in ambient air. Additional characterization is needed to understand these observations.

Keywords: Oxy-fired boilers, alumina-forming alloys, oxide dispersion strengthened alloys, scale spallation, CO2, H2O
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