| LI Mao-dong,NI Jin-fei,WANG Cai-fu,TIAN Ji-hong,LIU Guang-ming.Oxidation Behavior of T92 Steel in Water-Vapor Atmosphere[J].Surface Technology,,(): |
| Oxidation Behavior of T92 Steel in Water-Vapor Atmosphere |
| 投稿时间：2014-03-03 修订日期：2014-04-09 |
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| DOI： |
| KeyWord:T92 steel water vapor high temperature oxidation |
| Author | Institution |
| LI Mao-dong |
Guangzhou Special Pressure Equipment Inspection and Research Institute,Guangzhou ,China |
| NI Jin-fei |
Guangzhou Special Pressure Equipment Inspection and Research Institute,Guangzhou ,China |
| WANG Cai-fu |
Nanchang Hangkong University, Nanchang , China |
| TIAN Ji-hong |
Nanchang Hangkong University, Nanchang , China |
| LIU Guang-ming |
Nanchang Hangkong University, Nanchang , China |
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| Abstract: |
| Objective The oxidation behavior of T92 steel in 90%Ar+10%H2O atmosphere at 750℃ was investigated. Methods High temperature oxidation experiments conducted in a tube furnace. The morphology, microstructures and composition of oxide films were examined by SEM/EDS and XRD. Results The main oxide was composed of Fe2O3 and FeCr2O4 at the early oxidation stage in high temperature water vapor environment. Then at the further oxidation stage, Fe ions diffused outwardly, resulting in the accelerated oxidation. The oxidation scales consisted of two layers, an porous Fe2O3 outer layer and an Cr-rich inner layer. Voids existed in both layers. Some cracks between the inner and outer layers were observed. Conclusion A protective Cr-rich oxide film cannot form in the early oxidation stage. Therefore, T92 steel suffered oxidation in water-vapor atmosphere at high temperature. |
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