High-temperature oxidation of Fe-16.7% Mn-2.1% Ni-6.6% Si alloy in SO2 |
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| Authors: | Chung Y H McNallan M J |
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| Affiliation: | (1) Department of Civil Engineering, Mechanics, and Metallurgy, University of Illinois at Chicago, P.O. Box 4348, 60680 Chicago, Illinois;(2) Present address: School of Materials Engineering, Georgia Institute of Technology, 30332 Atlanta, Georgia |
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| Abstract: | The oxidation of an austenitic Fe-16.7% Mn-2.1% Ni-6.6% Si (by weight) alloy in SO2 in the temperature range 600–900°C is described. The corrosion products formed on this alloy in this environment below 800°C consist only of oxides, rather than a mixture of oxides and sulfides as is observed for unalloyed Fe or Mn. The kinetics of oxidation of the alloy in SO2 in this temperature range are similar to those in O2. It is proposed that these characteristics result from the presence of a thin silicate layer near the scale-metal interface that alters the gradient of oxygen potential within the scale. |
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| Keywords: | mixed oxidation sulfur dioxide austenitic alloys silicate scale |
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