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Reduction of oxide scale on hot-rolled steel by hydrogen at low temperature

Author:
Guan, Chuang   Li, Jun   Tan, Ning   He, Yong-Quan   Zhang, Shu-Guang  


Journal:
International Journal of Hydrogen Energy


Issue Date:
2014


Abstract(summary):

This study was carried out with an intention to remove the oxide scale on hot-rolled steel by gaseous reduction instead of traditional acid pickling method with an aim to reduce the pollution. The reduction of iron oxide scale by hydrogen argon mixture was studied by thermogravimetric tests in the temperature range of 370-550 degrees C. The rate controlling process was discussed according to the Avrami-Erofe'ev equation generalized method. The analysis suggests that the reduction of scale is controlled by two- and/or three-dimensional growth of nuclei in the whole temperature range investigated. The apparent activation energy exhibit a sudden decrease from 78.8 to 31.8 kJ/mol at temperature higher than 410 degrees C. Morphological structure of the reduced scale was investigated by scanning electron microscope. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.


Page:
15116-15124


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