Beneficial Effect of Impurity Sulfur on High-Temperature Steam Oxidation of High Chromium Ferritic Steels
| Periodical | Materials Science Forum (Volumes 522 - 523) |
|---|---|
| Main Theme | High-Temperature Oxidation and Corrosion 2005 |
| Edited by | Shigeji Taniguchi, Toshio Maruyama, Masayuki Yoshiba, Nobuo Otsuka and Yuuzou Kawahara |
| Pages | 147-154 |
| DOI | 10.4028/www.scientific.net/MSF.522-523.147 |
| Citation | Yoshinori Murata et al., 2006, Materials Science Forum, 522-523, 147 |
| Online since | August, 2006 |
| Authors | Yoshinori Murata, Masaaki Nakai, K. Nagai, Masahiko Morinaga, Y. Sasaki, Ryokichi Hashizume |
| Keywords | Cr2O3, Ferritic Steel, Hydrogen Desorption, Impurity, Steam Oxidation, Sulfide, Sulfur |
| Price | US$ 28,- |
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.
