The Effect of Air Knife Flow Rate on Coating Weight and Thickness for a Hot Dipping Process Simulator

Abstract:

A series of air knife flow rate were conducted by a hot dipping process simulator in laboratory to study its effect on coating weight and thickness. The research results show that, when the experimental steel were immersed for 3.5s in a Zn-0.24%Al zinc bath, with atmosphere of N₂-10%H₂ and dew point-60°C in the whole simulation, air knife flow rate (FR) was a key factor for coating surface quality. When FR was precisely controlled by the simulator from 200~500 l/min, the coating weight and thickness decreased significantly from 159.68 to 56.19 g/m² and 17.45 to 7.84 μm. In which the decreasing line was more obvious when FR increased from 300 to 400 l/min, that the coating thickness had a dramatic decreasing from 18.08 to 11.07μm.

• Periodical: Applied Mechanics and Materials (Volumes 633-634)
• Pages: 180-183
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.633-634.180
• Online since: September 2014
• Authors: Fang Fang*, Li Xin Wang, Shao Yun Zhou, Jiang Wen Li
• Keywords: Air Knife Flow Rate, Coating Thickness, Coating Weight, Hot Dipping Process

References

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