Abstract
An alloy steel containing 4.5 weight percent (w/o) manganese, 8.8 w/o aluminum, and 0.36 w/o carbon was sulfidized at temperatures of 973, 1073, and 1173 K in flowing H2/H2S gas mixtures corresponding to sulfur partial pressures in the range 10−8-10−4 atm. Slow parabolic weight uptake kinetics were observed at T=973 K whenP s 2≤10-7 atm and at T =1073 K when PS 2=10-7 atm. Under these conditions, a thin external scale rich in α-MnS was formed. At higher values of PS 2 at these temperatures, and at all values of PS 2 [(Fe, Mn)S plus (Fe, Mn)Al2S4] porous layer, which grew by inward sulfur transport, and an outer region of FeS, which grew by outward diffusion of iron.
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Quan, N.S., Young, D.J. Sulfidation behavior of an aluminum-manganese steel. Oxid Met 25, 107–119 (1986). https://doi.org/10.1007/BF00807999
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DOI: https://doi.org/10.1007/BF00807999