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XU ZHEFENG1,2, LIU SHAN3, GAN GUOYOU1,* , YI JIANHONG1
In this paper, tannic acid, fluorine titanate and silane coupling agent passivation solution were used to prepare hot dip galvanized steel sheet passivation coating. And then the mechanism of film formation was studied. The microstructure, surface composition, layer by layer element distribution and molecular structure of galvanized steel sheet passivation coating were revealed in scanning electron microscopy, X ray photoelectron spectroscopy, glow discharge atomic emission spectrometry and infrared spectrometry, respectively. The results show that: in one hand, using the silane coupling agent would produce many sol-gel particles in the passivation solution. On the other hand, tannic acid would produce spatial mesh structure. Therefore, passivation solution would generate a smooth, uniform and compact galvanized steel sheet passivation coating or membrane..
Tannic acid, Hot Dip Galvanizing, Chromium free passivation liquid, Coating, Film forming mechanism.
XU ZHEFENG, LIU SHAN, GAN GUOYOU, YI JIANHONG, T he film forming mechanism of chromium free passivation process in the tannic acid system for hot dip galvanizing coating, Optoelectronics and Advanced Materials - Rapid Communications, 9, 11-12, November-December 2015, pp.1487-1490 (2015).
Submitted at: Sept. 17, 2015
Accepted at: Oct. 28, 2015
Optoelectronics and Advanced Materials - Rapid Communications
(2023): 0.5 - 2023 Journal Citation Reports (Clarivate Analytics, 2024)
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