| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Steels in Extreme Environments
|
| Presentation Title |
High temperature oxidation of 304 SS at 630°C in combustion atmospheres |
| Author(s) |
Alexander G. Donchev, Fang Cao, Mathias Galetz |
| On-Site Speaker (Planned) |
Alexander G. Donchev |
| Abstract Scope |
The 304 SS is commonly used as constructive material in various hydrocarbon conversion process equipment at elevated temperatures. In this study samples of the alloy 304 SS were exposed at 630°C in CO/CO2/H2/H2O mixtures with and without addition of H2S. The kinetics were studied using thermal gravimetric analysis (TGA). The results indicate that oxidation, i.e. formation of chromium-based oxides or spinels, is the predominant attack mechanism in wet atmospheres without H2S. Here rather thin oxide scales formed which did not tend to spall and were quite protective. If H2S was present sulfidation exceeded oxidation. Thick sulfur containing scales mainly based on Fe-sulfides were formed. Those scale revealed a lot of pores and cracks. Hence, they were not protective. The results of the different exposure tests will be presented and discussed in view of the differences in scale formation and corrosion mechanisms. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Environmental Effects, Other |