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Applied Surface Science, Volume 285, Part B, 15 November 2013, Pages 458-468.
Kuang-Kuo Wang, Chiung-Wen Hsu, Liuwen Chang, Dershin Gan, Kuo-Cheng Yang.
Research Center for Physical Properties and Microstructure of Metals, Department of Materials and Optoelectronic Science, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan, ROC and
Steel Research and Development Department, China Steel Corporation, Kaohsiung 81233, Taiwan, ROC.
Abstract
This study investigated the interaction between the Al in the Zn bath and the surface oxides formed by selective oxidation on a 1.2Si–1.5Mn TRIP steel during hot-dip galvanizing. XPS and TEM were employed for characterization. The results indicated that the amorphous xMnO·SiO2 oxide could react with Al to form a Si–Mn–Al-containing oxide. The crystalline MnSiO3 and Mn2SiO4 oxides could be largely reduced by Al to form holes in the oxide film. Consequently, the steel covered by a layer of mixed xMnO·SiO2 and MnSiO3could form a continuous Fe2Al5 inhibition layer and showed the highest galvanizability among the three samples examined.
