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51317--9532-Corrosion of Superalloys in 200 Bar 750°C Supercritical Carbon Dioxide

Picture for Corrosion of Superalloys in 200 Bar 750°C Supercritical Carbon Dioxide
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Selected Fe- and Ni-based alloys and superalloys have been exposed in 99.995% supercritical carbon dioxide for 500 hours at 750°C and 200 bar. Post exposure examination provided information on corrosion rates, microstructural evolution and the carbon concentration in the exposed materials.

Product Number: 51317--9532-SG
ISBN: 9532 2017 CP
Author: James Keiser
Publication Date: 2017
Industry: Process Industries
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Corrosion Of Superalloys In 200 Bar 750°C Supercritical Carbon DioxideJames R Keiser Donovan N Leonard and Michael McDowellSupercritical carbon dioxide offers the potential for significant efficiency increases in power generation systems. However limited information is available on the compatibility of supercritical carbon dioxide with highly alloyed iron-base alloys and nickel-base alloys. These alloys are designed to have good strength at elevated temperature and would likely find use in a range of power generating systems including concentrating solar power nuclear and fossil systems.Selected alloys have been exposed in 99.995% supercritical carbon dioxide for 500 hours at 750°C and 200 bar. Post exposure examination provided information on corrosion rates microstructural evolution and the carbon concentration in the exposed materials. Studies show relatively low corrosion rates in almost all alloys studied but an apparent increase in carbon content even in nickel-base alloys.This manuscript has been authored by UT-Battelle LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher by accepting the article for publication acknowledges that the United States Government retains a non-exclusive paid-up irrevocable world-wide license to publish or reproduce the published form of this manuscript or allow other to do so for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan).

Key words: corrosion, supercritical carbon dioxide, nickel-base alloys, iron-base alloys, carburization

Corrosion Of Superalloys In 200 Bar 750°C Supercritical Carbon DioxideJames R Keiser Donovan N Leonard and Michael McDowellSupercritical carbon dioxide offers the potential for significant efficiency increases in power generation systems. However limited information is available on the compatibility of supercritical carbon dioxide with highly alloyed iron-base alloys and nickel-base alloys. These alloys are designed to have good strength at elevated temperature and would likely find use in a range of power generating systems including concentrating solar power nuclear and fossil systems.Selected alloys have been exposed in 99.995% supercritical carbon dioxide for 500 hours at 750°C and 200 bar. Post exposure examination provided information on corrosion rates microstructural evolution and the carbon concentration in the exposed materials. Studies show relatively low corrosion rates in almost all alloys studied but an apparent increase in carbon content even in nickel-base alloys.This manuscript has been authored by UT-Battelle LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher by accepting the article for publication acknowledges that the United States Government retains a non-exclusive paid-up irrevocable world-wide license to publish or reproduce the published form of this manuscript or allow other to do so for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan).

Key words: corrosion, supercritical carbon dioxide, nickel-base alloys, iron-base alloys, carburization

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