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Wednesday, 30 September 2020
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Raw materials & technologies, Technologies

Epoxy-based nanocomposite coating reinforced by a zeolite complex

Tuesday, 17 March 2020

Scientists have studied the anticorrosion properties of epoxy-based nanocomposite coatings reinforced by a zeolite complex on mild steel.

[Ni((Bu)<custom name='sub'>2</custom>[14]aneN<custom name='sub'>6</custom>)]-NaY can advance the ability of corrosion protection of epoxy-coatings. Image source: Mohamed Hassan - Pixabay.
[Ni((Bu)2[14]aneN6)]-NaY can advance the ability of corrosion protection of epoxy-coatings....

Epoxy-based nanocomposite coatings have attracted attention in industrial and engineering applications. Good and high efficiency of the epoxy-based nanocomposite coatings are due to their outstanding attributes like high-stability, good adhesion, diminished H2O permeability, remarkable acid-alkali and solvent resistance, and enhanced mechanical properties.

Epoxy coatings containing different weight fractions of encapsulated Ni (II) Complex-Zeolite Y ([Ni((Bu)2[14]aneN6)]-NaY) are prepared and used on mild steel. Their anticorrosion properties are explored by Tafel polarization and electrochemical impedance-spectroscopy (EIS) techniques under immersion in 3.5-wt. % NaCl solutions as a corrosive medium.

Significant protective effect

According to the results, it can be understood that [Ni((Bu)2[14]aneN6)]-NaY can advance the ability of corrosion protection of the epoxy-coating and its best weight-fraction is 3 wt%. SEM results showed that the presence of [Ni((Bu)2[14]aneN6)]-NaY in epoxy coatings has a significant protective effect and showed the epoxy-based nanocomposite coatings are crack free and uniform. The immersion test studies show that the Rct values of the synthesized nanocomposite coating a little decrease during 43 days immersion and the coatings have very high protective properties because after 43 days immersion, the PE value of nanocomposite coating is 99.72%.

The study has been published in Progress in Organic Coatings, Volume 136, November 2019.

Image source: Pixabay.

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