| Morphology of Oxide Scale and Oxidation Kinetics of Low Carbon Steel |
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| 引用本文： | Guang-ming CAO,Xiao-jiang LIU,BinSUN,Zhen-yu LIU. Morphology of Oxide Scale and Oxidation Kinetics of Low Carbon Steel[J]. 钢铁研究学报(英文版), 2014, 21(3): 335-341 |
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| 作者姓名： | Guang-ming CAO Xiao-jiang LIU BinSUN Zhen-yu LIU |
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| 基金项目： | Item Sponsored by National Natural Science Foundation of China （51204047） ~ National Key Technology Research and Development Program in 12th Five-year Plan of China （2011BAE13B04） The Fundamental Research Funds for the Central Universities of China （N100307006） |
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| 摘 要： | The oxidation kinetics and composition of oxide scales on low carbon steel(SPHC)were studied during isothermal oxidation.Thermogravimetric analyzer(TGA)was used to simulate isothermal oxidation process of SPHC for 240min under air condition,and the temperature range was from 500to 900 ℃.Scanning electron microscope(SEM)was used to observe cross-sectional scale morphology and analyze composition distribution of oxide scales.The morphology of oxide scale was classical three-layer structure.Fe2O3developed as whiskers at the outermost layer,and interlayer was perforated-plate Fe3O4 while innermost layer was pyramidal FeO.From the oxidation curves,the oxidation mass gain per unit area with time was of parabolic relation and oxidation rate slowed down.On the basis of experimental data,the isothermal oxidation kinetics model was derived and oxidation activation energy of SPHC steel was 127.416kJ/mol calculated from kinetics data.
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| 关 键 词： | 氧化动力学 低碳钢 氧化皮 形态 扫描电子显微镜 组成分布 热重分析仪 氧化过程 |
Morphology of Oxide Scale and Oxidation Kinetics of Low Carbon Steel |
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| Guang-ming CAO,Xiao-jiang LIU,Bin SUN,Zhen-yu LIU. Morphology of Oxide Scale and Oxidation Kinetics of Low Carbon Steel[J]. Journal of Iron and Steel Research, 2014, 21(3): 335-341 |
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| Authors: | Guang-ming CAO Xiao-jiang LIU Bin SUN Zhen-yu LIU |
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| Affiliation: | State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110004, Liaoning, China |
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| Abstract: | The oxidation kinetics and composition of oxide scales on low carbon steel (SPHC) were studied during isothermal oxidation. Thermogravimetric analyzer (TGA) was used to simulate isothermal oxidation process of SPHC for 240 min under air condition, and the temperature range was from 500 to 900 ℃. Scanning electron microscope (SEM) was used to observe cross-sectional scale morphology and analyze composition distribution of oxide scales. The morphology of oxide scale was classical three-layer structure. Fe2O3 developed as whiskers at the outermost layer, and interlayer was perforated-plate Fe3O4 while innermost layer was pyramidal FeO. From the oxidation curves, the oxidation mass gain per unit area with time was of parabolic relation and oxidation rate slowed down. On the basis of experimental data, the isothermal oxidation kinetics model was derived and oxidation activation energy of SPHC steel was 127. 416 kJ/mol calculated from kinetics data. |
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| Keywords: | oxide scale morphology activation energy of oxidation oxidation kinetics model low carbon steel |
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