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Journal of Chinese Society for Corrosion and protection  2012, Vol. 32 Issue (6): 455-459    DOI:
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PREPARATION OF CERIUM-SALT-DOPED VINYLTRIETHOXYSILANE FILMS ON SURFACES OF Q235 STEEL AND ITS CORROSION-RESISTING PROPERTY
ZHANG Xuming1, WANG Jianjun1, LIU Chunming1, HUANG Lijuan1, YIN Yuejun2
1. Key Laboratory for Anisotropy and Texture of Materials (MOE), Northeastern University, Shenyang 110819
2. Shenyang Hangda Technology Co., Ltd, Shenyang 110004
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Abstract  

Vinyltriethoxysilane films doped with cerium nitrate (Ce(NO3)3) were prepared on the surfaces of Q235 steel. The optimum addition level of cerium nitrate was studied by electrochemical impedance spectroscopy (EIS). The corrosion resistance of Q235 steel coated by the doped silane films during immersion in the aqueous solution of 3.5% NaCl was investigated by electrochemical impedance spectroscopy (EIS) and by the potentiodynamic polarization. Scanning electron microscope (SEM) was used to observe the morphology of surface of the doped silane films. The results showed that the optimum addition level of Ce(NO3)3 is 1×10-3 mol/L. The anode reaction and the cathode reaction on the interface of Q235 steel coated by the doped silane films during the corrosion were restrained. The corrosion current density of the Q235 steel coated with the doped silane films decreases by almost three orders of magnitude and its polarization resistance increases by about three orders of magnitude as well as its low-frequency impedance increases by more than four orders of magnitude when compared with those of the blank steel sheets during immersion in 3.5% NaCl aqueous solution.

Key words:  Vinyltriethoxysilane      cerium nitrate      polarization curve      electrochemical impedance spectroscopy      corrosion-resisting property     
Received:  15 November 2011     
ZTFLH:  TG146.4  
  TG178  

Cite this article: 

ZHANG Xuming, WANG Jianjun, LIU Chunming, HUANG Lijuan, YIN Yuejun. PREPARATION OF CERIUM-SALT-DOPED VINYLTRIETHOXYSILANE FILMS ON SURFACES OF Q235 STEEL AND ITS CORROSION-RESISTING PROPERTY. Journal of Chinese Society for Corrosion and protection, 2012, 32(6): 455-459.

URL: 

https://www.jcscp.org/EN/     OR     https://www.jcscp.org/EN/Y2012/V32/I6/455

 


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