Corrosion performance of iron aluminides

Conference · Mon Mar 01 00:00:00 EST 1993

OSTI ID:6787587

Natesan, K

Iron aluminides are being developed for use as structural materials and/or cladding alloys in fossil energy systems. Extensive development has been in progress on Fe[sub 3]Al-based alloys to improve the engineering ductility of these alloys. This paper describes results from the ongoing program to evaluate the corrosion performance of these alloys. The experimental program at Argonne National Laboratory involvesthermogravimetric analyses of alloys exposed to environments that simulate coal gasification and fluidized-bed combustion. Experiments were conducted at 650--1000[degrees]C in simulated oxygen/sulfur gas mixtures. In addition, oxidation/sulfidation behavior of several alumina-forming Fe-Al and Fe-Cr-Ni-Al alloys was determined for comparison with the corrosion rates obtained on iron aluminides. Other aspects of the program are corrosion evaluation of the aluminides in the presence of HC1-containing gases and in the presence of slag from a slogging gasifier. Results are used to establish threshold Al levels in the alloys for development of protective alumina scales. Thermal cycling tests are used to examine the spalling resistance of the scales.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6787587
• Report Number(s): ANL/MCT/CP-79046; CONF-9305135-1; ON: DE93011768
• Resource Relation: Conference: 7. annual conference on fossil energy materials, Oak Ridge, TN (United States), 11-13 May 1993
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
01 COAL, LIGNITE, AND PEAT
ALUMINIUM ALLOYS
CORROSION
IRON BASE ALLOYS
NICKEL ALLOYS
COAL GASIFICATION
FLUIDIZED-BED COMBUSTION
TEMPERATURE RANGE 1000-4000 K
ALLOYS
CHEMICAL REACTIONS
COMBUSTION
GASIFICATION
IRON ALLOYS
OXIDATION
TEMPERATURE RANGE
THERMOCHEMICAL PROCESSES
360105* - Metals & Alloys- Corrosion & Erosion
010404 - Coal
Lignite
& Peat- Gasification
014000 - Coal
Lignite
& Peat- Combustion