Corrrosion of low-nickel weldments in coal gasification atmospheres [electronic resource].
- Argonne, Ill. : Argonne National Laboratory, 1984.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- Pages: 16 : digital, PDF file
- Additional Creators:
- Argonne National Laboratory
United States. Department of Energy. Office of Scientific and Technical Information
- Coal gasification environments exhibit low oxygen and moderate-to-high sulfur partial pressures; under these conditions, structural alloys welded with high-nickel filler metals are susceptible to the sulfidation mode of attack even though the base metal itself has adequate resistance to sulfidation. To understand the role of nickel in the weldment on the corrosion process, a number of weldments of Incology 800H base metal welded with several commercially available low-nickel filler metals have been tested in mixed oxygen-sulfur atmospheres. Results on the compositional variations and morphological developments obtained from exposed specimens are presented. The results showed that high-nickel weld metal can accelerate the oxidation/sulfidation process. In addition, the weld interface region in all the alloys (irrespective of the nickel content of the filler metal) was susceptibel to accelerated attack in mixed-gas atmospheres; however, weldments with lower-nickel filler metals exhibited smaller scale thicknesses and showed significant promise for application in fossil fuel systems. 4 references, 15 figures, 3 tables.
- Published through SciTech Connect.
- Funding Information:
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