Supercritical CO2 compatibility of structural alloys at 400°-750°C

B. A. Pint, R. G. Brese, J. R. Keiser

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

6 Scopus citations

Abstract

For proposed supercritical CO2 (sCO2) cycles, there is considerable interest in increasing the size and efficiency of such systems for power generation, with efficiency increased by raising the peak temperature above 700°C. As an initial assessment of potential Fe-And Ni-base structural alloys for this application, the current project screened a wide range of alloy coupons in 500 h exposures at 200 bar high purity CO2 from 400°-750°C. At the lower temperatures, more Fe-base alloys were exposed while above 600°C, more Ni-base alloys were exposed as the Fe-base alloys with <18%Cr formed thick Fe- rich oxides. Initial characterization has focused on light microscopy of polished cross-sections to examine the thickness of the reaction products.

Original languageEnglish
Title of host publicationNACE International - Corrosion Conference and Expo 2016
PublisherNational Assoc. of Corrosion Engineers International
Pages4034-4042
Number of pages9
ISBN (Electronic)9781510821354
StatePublished - 2016
EventCorrosion 2016 - Vancouver, Canada
Duration: Mar 6 2016Mar 10 2016

Publication series

NameNACE - International Corrosion Conference Series
Volume5
ISSN (Print)0361-4409

Conference

ConferenceCorrosion 2016
Country/TerritoryCanada
CityVancouver
Period03/6/1603/10/16

Keywords

  • Fe-Cr alloys
  • High temperature corrosion
  • Ni-Cr alloys
  • Supercritical carbon dioxide

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