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Sulfidation properties of Fe-Al alloys at 1173 K in H2S-H2 atmospheres

Authors:	P. C. Patnaik W. W. Smeltzer

Affiliation:	(1) Department of Metallurgy and Materials Science, McMaster University, L8S 4M1 Hamilton, Ontario, Canada

Abstract:	The sulfidation kinetics and morphological development of reaction products are reported for Fe-9 and 18 at.% Al alloys exposed at 1173 K to H₂S-H₂ atmospheres at sulfur pressures in the range 10^–1–10³ Pa. The Fe-9 Al alloy sulfidized parabolically at ${text{P}}_{{text{S}}_{text{2}} } = 10^{ - 1}$ Pa giving rise to a duplex scale composed of an outer Al-doped FeS layer and an inner FeS + FeAl₂S₄ lamellar layer and to an internal sulfidation zone containing Al₂S₃ precipitates. The Fe-18 Al alloy which was sulfidized at $10^2 {text{Pa}} geqslant {text{P}}_{S_2 } geqslant 10$ .

Keywords:	Fe-Al alloys sulfidation reaction mechanism
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