Corrosion performance of Fe-Cr-Al and Fe aluminide alloys in complex gas environments

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Alumina-forming structural alloys can offer superior resistance to corrosion in the presence of sulfur-containing environments, which are prevalent in coal-fired fossil energy systems. Further, Fe aluminides are being developed for use as structural materials and/or cladding alloys in these systems. Extensive development has been in progress on Fe{sub 3}Al-based alloys to improve their engineering ductility. In addition, surface coatings of Fe aluminide are being developed to impart corrosion resistance to structural alloys. This paper describes results from an ongoing program that is evaluating the corrosion performance of alumina-forming structural alloys, Fe-Al and Fe aluminide bulk alloys, and Fe aluminide coatings ... continued below

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15 p.

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Natesan, K. & Johnson, R.N. May 1, 1995.

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  • Natesan, K. Argonne National Lab., IL (United States)
  • Johnson, R.N. Pacific Northwest Lab., Richland, WA (United States)

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Description

Alumina-forming structural alloys can offer superior resistance to corrosion in the presence of sulfur-containing environments, which are prevalent in coal-fired fossil energy systems. Further, Fe aluminides are being developed for use as structural materials and/or cladding alloys in these systems. Extensive development has been in progress on Fe{sub 3}Al-based alloys to improve their engineering ductility. In addition, surface coatings of Fe aluminide are being developed to impart corrosion resistance to structural alloys. This paper describes results from an ongoing program that is evaluating the corrosion performance of alumina-forming structural alloys, Fe-Al and Fe aluminide bulk alloys, and Fe aluminide coatings in environments typical of coal-gasification and combustion atmospheres. Experiments were conducted at 650-1000{degrees}C in simulated oxygen/sulfur gas mixtures. Other aspects of the program are corrosion evaluation of the aluminides in the presence of HCl-containing gases. Results are used to establish threshold Al levels in the alloys for development of protective alumina scales and to determine the modes of corrosion degradation that occur in the materials when they are exposed to S/Cl-containing gaseous environments.

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15 p.

Notes

OSTI as DE96002702

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  • 2. international conference on heat resistant materials, Gatlinburg, TN (United States), 11-14 Sep 1995

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  • Other: DE96002702
  • Report No.: ANL/ET/CP--85137
  • Report No.: CONF-950908--5
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 135075
  • Archival Resource Key: ark:/67531/metadc619146

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  • May 1, 1995

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  • June 16, 2015, 7:43 a.m.

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  • Dec. 11, 2015, 4:56 p.m.

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Natesan, K. & Johnson, R.N. Corrosion performance of Fe-Cr-Al and Fe aluminide alloys in complex gas environments, article, May 1, 1995; Illinois. (digital.library.unt.edu/ark:/67531/metadc619146/: accessed October 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.