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Morphology of Oxide Scale and Oxidation Kinetics of Low Carbon Steel
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Morphology of Oxide Scale and Oxidation Kinetics of Low Carbon Steel
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Journal Article
Morphology of Oxide Scale and Oxidation Kinetics of Low Carbon Steel
2014
Overview
The oxidation kinetics and composition of oxide scales on low carbon steel （SPHC） were studied during i- sothermal 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. Fe2 03 developed as whiskers at the outermost lay- er, and interlayer was perforated-plate Fe3 04 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 ba- sis 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.
Publisher
Elsevier Ltd,Springer Singapore,Springer Nature B.V
Subject
activation energy of oxidation
/ Applied and Technical Physics
/ Kinetics
/ Machines
/ Oxides
/ Scanning electron microscopy
/ 低碳钢
/ 形态
/ 扫描电子显微镜
/ 氧化动力学
/ 氧化皮
/ 氧化过程
/ 热重分析仪
/ 组成分布
