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Development of low chromium substitute alloys for high temperature applications.
J Electrochem Soc 1988 Mar; 135(3):749-755
This paper describes the oxidation of a base-line Fe-8Cr-16Ni (weight percent) composition, compared to that of alloys with small additions of Al, Si, Mo, and Mn. Oxidation was done in air over the temperature range of 600 deg-1000 deg C for up to 1000h. Alloys that contained Al and Si showed excellent oxidation resistance because of the formation of a layer containing Si at the scale-metal interface. Small additions of Al seemed to form oxide nuclei during a transient oxidation period, aided the formation of a layer containing Si and/or a chromium oxide, and provided better oxide adherence. Molybdenum and manganese additions stabilized a fully austenitic microstructure at room temperature. The oxidation behavior of these alloys was compared to that of 304 stainless steel and some commercial superalloys. Reaction kinetics, oxide morphologies, and oxidation mechanisms of the substitute alloys are described.
Mining-industry; Mineral-processing; Metals; Author Keywords: oxidation; chromium alloys; high-temperature effects; corrosion resistance; crystal microstructure; reaction kinetics; crystal morphology; aluminium; silicon; molybdenum; manganese; alloying additions
Je M. Oh, United States Department of the Interior, Bureau of Mines, Albany Research Center, Albany, Oregon 97321
OP; Journal Article
Issue of Publication
Journal of the Electrochemical Society
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division