Anti-corrosion performance of waterborne Zn-rich coating
with modified silicon-based vehicle and lamellar
Zn (Al) pigments |
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| Authors: | Liuyan Zhang Aibin M Jinghua Jiang Dan Song Jianqing Chen and Donghui Yang |
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| Institution: | National Engineering Research Center of Water Resources Efficient Utilization and Engineering Safety,
Hohai University, Nanjing 210098, PR China
College of Mechanics and Materials, Hohai University, Nanjing 210098, PR China;Research Center of Water Resources Efficient Utilization and Engineering Safety,
Hohai University, Nanjing 210098, PR China
College of Mechanics and Materials, Hohai University, Nanjing 210098, PR China;College of Mechanics and Materials, Hohai University, Nanjing 210098, PR China
Changzhou Hohai Technology Research Institute Co., Ltd, Changzhou, PR China;College of Mechanics and Materials, Hohai University, Nanjing 210098, PR China
Changzhou Hohai Technology Research Institute Co., Ltd, Changzhou, PR China;College of Mechanics and Materials, Hohai University, Nanjing 210098, PR China
cChangzhou;College of Mechanics and Materials, Hohai University, Nanjing 210098, PR China
cChangzhou |
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| Abstract: | In order to develop the eco-friendly Zn-rich coatings with higher corrosion resistance
and lower pigment contents, several series of coatings were designed and manufactured employing
lamellar Zn (Al) pigments mixed with silicone-acrylate emulsion modified inorganic silicate
vehicle, and then were evaluated by conventional methods and the electrochemical method.
The results indicated that the pigment contents reduced to approximate 25 mass% with lamellar
Zn or (Zn and Al) pigments as substitute for spherical Zn pigments, and pigment mixtures
were homogeneously dispersed due to silicone-acrylate emulsion moistening modification.
Furthermore, the optimal coating had good coating properties (adhesion grade: one), acid resistance (lower mass losses) and anti-corrosive performance (improved corrosion potential
and anodic passivation). The experimental results indicated that the modified lamellar Zn (Al)
coating was suitable for large-scale spread and application on protecting steel structures in the
hostile environment. |
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| Keywords: | Zn-rich coating Corrosion performance |
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