The use of a recuperator to recover waste heat from the exhaust gases is one method for improving a microturbine’s energy efficiency. This study looked at the effect of water vapor in the exhaust gas on the oxidation resistance of a current technology stainless steel and several high performance replacement alloys. Alloys of interest are high-Cr, Ni-base superalloys such as alloy 625 and aluminum-containing alloys such as Haynes alloy 214 and Plansee alloy PM2000, which is an oxide-dispersed FeCrAl. The latter two alloys form a protective external alumina scale which is more resistant to water vapor environments than chromia scales. Scanning and transmission electron microscopy characterization of the specimen surface oxides after laboratory exposures showed only minor effects of the addition of water vapor to the environment, which is consistent with the excellent corrosion resistance of these high performance alloys.
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ASME Turbo Expo 2002: Power for Land, Sea, and Air
June 3–6, 2002
Amsterdam, The Netherlands
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
0-7918-3606-1
PROCEEDINGS PAPER
The Effect of Water Vapor on Oxidation Performance of Alloys Used in Recuperators Available to Purchase
Bruce A. Pint,
Bruce A. Pint
Oak Ridge National Laboratory, Oak Ridge, TN
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Karren L. More,
Karren L. More
Oak Ridge National Laboratory, Oak Ridge, TN
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Peter F. Tortorelli
Peter F. Tortorelli
Oak Ridge National Laboratory, Oak Ridge, TN
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Bruce A. Pint
Oak Ridge National Laboratory, Oak Ridge, TN
Karren L. More
Oak Ridge National Laboratory, Oak Ridge, TN
Peter F. Tortorelli
Oak Ridge National Laboratory, Oak Ridge, TN
Paper No:
GT2002-30543, pp. 1045-1051; 7 pages
Published Online:
February 4, 2009
Citation
Pint, BA, More, KL, & Tortorelli, PF. "The Effect of Water Vapor on Oxidation Performance of Alloys Used in Recuperators." Proceedings of the ASME Turbo Expo 2002: Power for Land, Sea, and Air. Volume 1: Turbo Expo 2002. Amsterdam, The Netherlands. June 3–6, 2002. pp. 1045-1051. ASME. https://doi.org/10.1115/GT2002-30543
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