https://doi.org/10.15255/KUI.2013.026
Published: Kem. Ind. 63 (9-10) (2014) 317-322
Paper reference number: KUI-26/2013
Paper type: Original scientific paper
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Effects of Nano-sized Titanium Powder on the Anti-corrosion Property of Epoxy Coatings on Steel

X. Z. Zhang and Y. J. Li

Abstract

The protective performance of epoxy asphalt coatings modified by 200 meshes titanium powder, in mass fractions 2 %, 5 %, 10 %, and 20 %, and coatings without titanium and with mass fractions of nano-sized titanium powder 5 %, 10 %, and 20 %, was studied using electrochemical impedance spectroscopy (EIS) and salt spray test. Moreover, infrared spectrum and X-ray photoelectron spectroscopy (XPS) were used to study the structure of the coatings. The results show that nanometer titanium may be involved in the reaction solidification process of the coatings. Therefore, the addition of titanium nano-powder to the coatings does not significantly change the physical properties of the coatings (toughness). On the other hand, coatings with nano-sized titanium powder have better protection performance than coatings containing micrometre- sized titanium powder. At the same time, because a chemical key exists between nano-sized titanium particles and the coating agent, the increase in the number of charge carriers in the coating due to the existence of the titanium metal is lower. For this reason, the resistance change order is different from the change law of the coating modified with the micrometre-sized titanium powder, and the change rule of the electrical resistance for the coatings modified by nano-powder titanium cannot be explained by the change of dielectric constants.

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Keywords

anti-corrosion property, nano-sized titanium, epoxy coal tar coating