Abstract
High temperature erosion-corrosion (EC) in coal gasification atmospheres (CGA) presents unique demands on material performance. Extensive screening of many engineering alloys in unique EC test apparatus at IITRI has generated a broad data base. These data were analyzed to provide a cogent summary for applications and future research. The dependence of erosion-corrosion on alloy chemistry, environmental parameters including temperature, pressure, and gas composition, and erodent variables including velocity, particle size, hardness, and loading rate were evaluated. High resistance to corrosion did not assure good erosion-corrosion resistance. High chromium contents, in excess of 25 pct, was required to ensure good high temperature erosion-corrosion resistance in most alloys tested. However, the data show three alternatives offer the potential of reducing chromium requirements: substitution offerritics over austenitics, small additions of aluminum, and aluminizing. Metallurgical examination of selected specimens revealed that damage morphology varied greatly with the degree and extent of damage rate, and was sensitive to alloy composition, environmental conditions, and erodent loading. For example, alloy 6B exhibited mild brittle scale erosion at low erosion loading but suffered whole grain pullout due to preferential grain boundary sulfidation at high loading. Based on the data and analysis, a tentative model for high temperature EC was outlined and the implications for future testing were discussed.
Similar content being viewed by others
References
K. Natesan and W. T. Bakker. inJournal of Materials for Future Energy Systems, Am. Soc. for Met., 1984, vol. 6, No. 3, pp. 163–71.
“Heat Recovery Technology in the Design of Coal Gasification Plants in Fossil Fuel Gasification Technical Evaluation Services,” Final Report, Gas Research Institute-81/074, NTIS PD-84-242628, 1983, pp. 1–23.
G. Sorrell, M. J. Jumphries, E. Bullock, and M. Van de Voorde: in ASM Conference on Materials for Future Energy Systems, May 1–3, 1984, Wash., DC, to be published.
R. Tanaka: in “Nippon Steel Technical Report,” Dec. 1983, No. 22, pp. 75–85.
C. Hales, S. Bhattacharyya, and M. A. H. Howes: inThe Properties and Performance of Materials in Coal Gasification Environment, V.L. Hill and H. L. Black, eds., ASM, Metals Park, OH, 1981, pp. 605–28.
Phase IV, Erosion-Corrosion Testing (work performed at HT Research Institute) of “A Program to Discover Materials Suitable for Service Under Hostile Conditions Obtaining in Equipment for the Gasification of Coal and Other Solid Fuels,” Reports of the Metals Properties Council, Inc., to the Department of Energy and its predecessor agencies and the Gas Research Institute by A. O. Schaeferet al., 1975–84.
S. Bhattacharyya, D. Yates, and V. L. Hill:Proc. 5th Intl. Conf. on Erosion by Liquid and Solid Impact, Cambridge, England, 1979, Paper No. 45, 9 pp.
“Erosion-Corrosion of Materials in Coal Gasification Atmospheres,” Final Report (see Ref. 6), Metal Properties Council, Inc., A.O. Schaeferet al., 1985.
S. Hogmark, A. Hammarsten, and S. Soderberg:Proc. 6th Int. Conf. of Erosion by Liquid and Solid Impact, J. E. Field and N. S. Lorney, eds., Cambridge, England, Sept. 5–8, 1983, pp. 37-(l-8).
“A Program to Discover Materials Suitable for Service Under Hostile Conditions Obtaining in Equipment for the Gasification of Coal and Other Solid Fuels,” IITRI-MPC, Contract No. EX-76-C-01-1784, Phase I, Annual and Semiannual Reports for 1978–1984.
K. Natesan and M. B. Dalaplane: “Oxidation-Sulfidation Behavior of Materials for Use in Coal Conversion Systems,” inProc. Conf. Corrosion-Erosion Behavior of Materials, K. Natesan, ed., AIME, Warrendale, PA, 1980, pp. 1–29.
K. Natesan: “Corrosion Behavior of Materials in Low and Medium Btu Coal Gasification Environments,” inProc. Conf. Corrosion Erosion-Wear of Materials in Emerging Fossil Energy Systems, A. V. Levy, ed., NACE, Houston, TX, 1982, pp. 100–36.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Wire, G.L., Vesely, E.J. & Agarwal, S. Erosion-corrosion of metals in coal gasification atmospheres. JMES 8, 150–167 (1986). https://doi.org/10.1007/BF02833340
Issue Date:
DOI: https://doi.org/10.1007/BF02833340