High-temperature corrosion behavior of iron-aluminide alloys and coatings

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An Fe-28 at.% Al-2% Cr alloy doped with Y{sub 2}O{sub 3} showed improved scale adhesion relative to a dispersion-free form of the same composition. However, doping with CeO{sub 2} or La{sub 2}O{sub 3} was detrimental to oxidation behavior. A study of weld-overlay iron-aluminide coatings showed that, those with sufficiently high aluminum concentrations had sulfidation resistance in H{sub 2}S-H{sub 2}-H{sub 2}O-Ar at 800 C equivalent to the most resistant bulk iron aluminides. These corrosion-resistant coatings have the potential to be effective barriers in high-temperature sulfidizing environments provided the appropriate combinations of filler metal, process parameters, and substrate are used to produce ... continued below

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12 p.

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Tortorelli, P. F.; DeVan, J. H.; Pint, B. A.; Wright, I. G. & Saunders, S. R. J. July 1995.

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Description

An Fe-28 at.% Al-2% Cr alloy doped with Y{sub 2}O{sub 3} showed improved scale adhesion relative to a dispersion-free form of the same composition. However, doping with CeO{sub 2} or La{sub 2}O{sub 3} was detrimental to oxidation behavior. A study of weld-overlay iron-aluminide coatings showed that, those with sufficiently high aluminum concentrations had sulfidation resistance in H{sub 2}S-H{sub 2}-H{sub 2}O-Ar at 800 C equivalent to the most resistant bulk iron aluminides. These corrosion-resistant coatings have the potential to be effective barriers in high-temperature sulfidizing environments provided the appropriate combinations of filler metal, process parameters, and substrate are used to produce adequate aluminum concentrations and minimal chromium contents. Exposures in an oxidizing/sulfidizing environment containing varying amounts of HCI at 450 and 550 C showed that Fe{sub 3}Al alloys had good corrosion resistance.

Physical Description

12 p.

Notes

OSTI as DE95014280

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  • 9. annual conference on fossil energy materials, Oak Ridge, TN (United States), 16-18 May 1995

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  • Other: DE95014280
  • Report No.: CONF-9505204--5
  • Grant Number: AC05-84OR21400
  • DOI: 10.2172/86958 | External Link
  • Office of Scientific & Technical Information Report Number: 86958
  • Archival Resource Key: ark:/67531/metadc794788

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • July 1995

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  • Dec. 19, 2015, 7:14 p.m.

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  • Feb. 1, 2016, 12:38 p.m.

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Tortorelli, P. F.; DeVan, J. H.; Pint, B. A.; Wright, I. G. & Saunders, S. R. J. High-temperature corrosion behavior of iron-aluminide alloys and coatings, report, July 1995; Tennessee. (digital.library.unt.edu/ark:/67531/metadc794788/: accessed April 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.