Journal of Northeastern University(Natural Science)

Journal of Northeastern University ›› 2012, Vol. 33 ›› Issue (3): 369-372.DOI: -

• OriginalPaper • Previous Articles     Next Articles

Preparation and properties of complex silane conversion coating on galvanized steel sheet

Wang, Lei (1); Liu, Chang-Sheng (1); Yu, Hai-Yun (1); An, Cheng-Qiang (2)   

  1. (1) Key Laboratory for Anisotropy and Texture of Materials, Ministry of Education, Northeastern University, Shenyang 110819, China; (2) School of Environmental and Chemical Engineering, Shenyang Ligong University, Shenyang 110159, China
  • Received:2013-06-19 Revised:2013-06-19 Published:2013-04-04
  • Contact: Wang, L.
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Abstract: A complex γ-APT and γ-GPT silane conversion coating was prepared on the galvanized steel sheet. The micro-morphology of the coating before and after passivation was observed by SEM. The corrosion resistance of the coating was tested by neutral salt spray test and electrochemistry test. The adhesion and flexibility of the coating were tested. The results showed that the surface of the complex silane conversion coating is completely consecutive and compact. The coating can endure the neutral salt spray test for 72 h. The complex silane coating can increase the corrosion resistance of galvanized steel sheet if the impedance value and the polarization resistance increase. The adhesion of the coating is grade 1. The coating flexibility is T-bend 1.

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