Evaluation of the Effect of Mixing Ratio of Epoxy Silicon Resin and Aminosilane on the Coating Protective Properties by Electrochemical Impedance Spectroscopy

Document Type : Original Article

Authors

Surface Coatings and Corrosion Department, Institute for Color Science and Technology, Tehran, Iran

Abstract

This work intends to study the effect of epoxy silicon resin mixture ratio with aminosilane hardener on corrosion protection properties of the coating. Coatings with different mixture ratio ranging 15-50% resin: hardener were prepared and cured for 1 h at 120 °C. To evaluate corrosion protection properties, electrochemical impedance spectroscopy (EIS) was employed after 240 h exposure of samples to salt spray. In addition, pull-off adhesion strength was measured after salt spray exposure. Results showed deterioration of protection properties and adhesion strength of the coatings below and above 20% mixture ratio. According to the tests results, the optimal mixture ratio of epoxy silicon to aminosilane was 20%. 

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References

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Journal of Color Science and Technology
Volume 13, Issue 3
December 2019
Pages 191-200

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