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Effect of pre‐oxidation of Fe 3 Al on its corrosion resistance in sulfur and chlorine contaminated syngas
Author(s) -
Ilyushechkin Alexander Y.,
Dolan Michael D.,
McLennan Keith G.,
Sharma Sunil D.
Publication year - 2011
Publication title -
asia‐pacific journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.348
H-Index - 35
eISSN - 1932-2143
pISSN - 1932-2135
DOI - 10.1002/apj.623
Subject(s) - corrosion , oxide , syngas , alloy , sulfur , chlorine , materials science , metallurgy , layer (electronics) , high temperature corrosion , oxygen , partial pressure , chemical engineering , chemistry , catalysis , composite material , organic chemistry , engineering
Pre‐oxidation treatment of Fe 3 Al alloy, a material used in high temperature gas filtration, is common practice to improve corrosion resistance. This work evaluates the various pre‐oxidation procedures in terms of the quality of the protective layers formed, using microstructural analysis and corrosion tests. The effect of atmosphere on the oxidation kinetics at 950 °C and the oxide layer morphology was determined. The corrosion resistance of Fe 3 Al filters was investigated in simulated coal‐derived synthesis gas in the temperature range 600–800 °C. It was found that the corrosion resistance of Fe 3 Al was significantly improved by the development of the surface oxide layer, and that the quality of oxide layer is dependent on the oxidation treatment conditions, such partial oxygen pressure, p O 2 . The best corrosion resistance was achieved with a two‐stage oxidation treatment, involving initial pre‐oxidation at low p O 2 and final pre‐oxidation at high p O 2 . © 2011 Curtin University of Technology and John Wiley & Sons, Ltd.