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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 3    No. 4    December 1993

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INFLUENCE OF Al ON HIGH TEMPERATURE SULFIDATION OF AN Fe-25Cr ALLOY IN H2S-H2 GAS MIXTURES
Qi  Huibin1;  Zhu  Rizhang1; Wang  Shujuan2

1.Department of Surface Science and Corrosion Engineering; University of Science and Technology Beijing; Beijing 100083; China;
2.Northeastern Unirersity; Shenyang 110006; China

Abstract:The effects of 5 wt.-% Al and 10 wt.-% Al on the sulfidation behaviour of the Fe-25Cr alloy in H2S-H2 gas mixtures in the temperature range of 700~900 C has been studied.The sulfidation resistance of Fe-25Cr was improved and the sulfide scale morphologies,composition and structure of Fe-25Cr changed remarkably.The sulfidation kinetics of the alloys with alu- minium obeyed basically the parabolic law after an initial period of reaction time.The sulfida- tion mechanism of the Fe-Cr-Al alloy has been proposed.

 

Key words: Al; Fe-25Cr; H2S-H2 gas mixtures; sulfidation

ISSN 1672-7029
CN 43-1423/U

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