Abstract
A protective SiO2–Al2O3–Na2O glass-based coating for slab reheating application was deposited on AISI 304 stainless steel by air spraying, and its effect on high-temperature oxidation behavior of AISI 304 was investigated. Isothermal oxidation of bare and coated specimens was carried out at 1250°C in air. The results showed that the glass coating could markedly decrease weight gain of AISI 304 by 91.7% after exposure of 9 h, minimize high-temperature scaling, and enhance steel surface quality. The protective effect is attributed to the formation of molten glass layer on steel surface at high temperature, which acts as an effective oxygen diffusion barrier. This glass-based protective coating by low-cost and easily handling method is potentially applicable in a slab reheating process.
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Acknowledgments
The authors gratefully acknowledge the financial supports from Key Topics in Innovation Engineering Funded by the Chinese Academy of Sciences (No. KGCX2-YW-224), Key Projects in the National Science & Technology Pillar Program in the Eleventh Five-year Plan Period (No. 2006BAC02A14), and the National Natural Science Foundation of China (No. 50774073).
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Liu, P., Wei, L., Zhou, X. et al. A glass-based protective coating on stainless steel for slab reheating application. J Coat Technol Res 8, 149–152 (2011). https://doi.org/10.1007/s11998-010-9302-1
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DOI: https://doi.org/10.1007/s11998-010-9302-1