Beneficial Effect of Impurity Sulfur on High-Temperature Steam Oxidation of High Chromium Ferritic Steels
| Autor: | Ryokichi Hashizume, Masahiko Morinaga, Yasutoshi Sasaki, Yoshinori Murata, Masaaki Nakai, Kensuke Nagai |
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| Rok vydání: | 2006 |
| Předmět: |
chemistry.chemical_classification
Materials science Hydrogen Sulfide Mechanical Engineering Metallurgy Oxide food and beverages chemistry.chemical_element Condensed Matter Physics complex mixtures Sulfur humanities Chromium chemistry.chemical_compound chemistry Mechanics of Materials Impurity General Materials Science Oxidation resistance Dissolution |
| Zdroj: | Materials Science Forum. :147-154 |
| ISSN: | 1662-9752 |
| DOI: | 10.4028/www.scientific.net/msf.522-523.147 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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