The effect of water vapor on oxidation performance of alloys used in recuperators

Bruce A. Pint, Karren L. More, Peter F. Tortorelli

Research output: Contribution to conferencePaperpeer-review

25 Scopus citations

Abstract

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.

Original languageEnglish
Pages1045-1052
Number of pages8
DOIs
StatePublished - 2002
EventProceedings of the ASME Turbo Expo 2002; Aircraft Engine, Coal, Biomass and Alternative Fuels, Combustion and Fuels, Education, Electric Power, Vehicular and Small Turbomachines - Amsterdam, Netherlands
Duration: Jun 3 2002Jun 6 2002

Conference

ConferenceProceedings of the ASME Turbo Expo 2002; Aircraft Engine, Coal, Biomass and Alternative Fuels, Combustion and Fuels, Education, Electric Power, Vehicular and Small Turbomachines
Country/TerritoryNetherlands
CityAmsterdam
Period06/3/0206/6/02

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