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Tuesday, 24 September 2019
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Raw materials & technologies, Technologies, Nanotechnology

Coatings binders: Nano silica enhances anticorrosion performance of epoxy coatings

Tuesday, 26 August 2014

Anticorrosion performance of a clear epoxy coating was enhanced by incorporation of modified nano silica into the polymer matrix.

Improving corrosion resistance with modified nano particles

Source: Fotolia/fafoutis

Improving corrosion resistance with modified nano particles

Source: Fotolia/fafoutis

The surface of nano silica was treated with 3-Glycidoxypropyltrimethoxysilane (GPTMS) in order to achieve proper dispersion of nanoparticles.

4-6 wt% SiO2 nanoparticles achieved top performance

The surface grafting of GPTMS on the nanoparticles was detected using fourier transform infrared spectroscopy (FTIR) and dispersion stability test. Corrosion performance of the coated mild steel specimens was investigated employing electrochemical impedance spectroscopy (EIS) and salt spray test. Incorporation of 4-6 wt% SiO2nanoparticles possessed the best corrosion performance. The electrochemical results are completely in agreement with the morphological results of the surface obtained from scanning electron microscopy (SEM).

The study is published in: Journal of Industrial and Engineering Chemistry, In Press.

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