Affiliation:
1. Nagoya University
2. The Kansai Electric Power Company Inc.
Abstract
The effect of S in steels on high-temperature steam oxidation resistance was investigated with
respect to the content and the state in high Cr ferritic steels. The beneficial sulfur effect on
high-temperature steam oxidation resistance was verified in high Cr ferritic steels. It was
considered that Cr was enriched in the vicinity of the segregated S on the specimen surface
because of a strong affinity between Cr and S atoms, resulting in the easy formation of the
passive Cr2O3 oxide layer on the surface even after the steam oxidation test for a short time. It
was found that the precipitated S operated more effectively to the improvement of the steam
oxidation resistance compared to the solid-solution state of S in the steels. Furthermore, the
sulfur effect on the high temperature steam oxidation resistance was related strongly to the
amount of dissolution hydrogen in the high Cr ferritic steels.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
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