High-Temperature Oxidation Kinetics of Galvalume-Coated Steel Sheet

Abstract:

The high-temperature oxidation kinetics of Galvalume-coated steel sheet and Q235 steel sheet were studied by thermogravimetric analysis (TGA). A new diffusion equation was deduced and used to investigate their kinetic mechanism. The characteristic time (t_c) in the equation can be expressed as a function of temperature T, diffusion coefficient D⁰, thickness of the steel sheet H, etc. The calculated result showed that the oxidation reaction rate of Galvalume-coated steel sheet was slower than that of Q235 steel sheet through comparing the values of t_c. Besides, the oxidation reaction rate increased with the temperature rising from 750 to 850 °C. Compared our experimental data with the theoretical value calculated by the new function, a good agreement has been obtained.

• Periodical: Advanced Materials Research (Volume 402)
• Pages: 138-141
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.402.138
• Online since: November 2011
• Authors: Yue Wu, Qun Luo, Biao Zhou, Feng Jin, Qian Li
• Keywords: Galvalume-Coated Steel, High-Temperature Oxidation, Kinetic

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