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1. Aug 2019 | Application Areas

High protective performance coatings for mild steel

High protective performance coatings were prepared by dispersing polyaniline (PANI) nanowires into epoxy modified furfural-acetone (EMFA) resin matrix and then cured with phenalkamine.

Steel grids stacked on top of each other.

High performance EMFA/PANI coating was prepared by adding PANI nanowires into EMFA resin and then cured with phenalkamine. Source: congerdesign / Pixabay.

The protective performance of coatings was investigated by immersion experiments in 12% NaCl solution at 90 °C and Electrochemical Impedance Spectroscopy (EIS) measurements.

The coating containing 1.0% PANI nanowires showed high impedance (>1010 ohm·cm2) after 80 days immersion, exhibiting great protective performance.

Excellent flexibility of pure EMFA coating and EMFA/PANI coating

X-ray photoelectron spectroscopy (XPS) surveys verified the formation of passive layer (Fe2O3/Fe3O4) on steel surface beneath the coating with 1.0% PANI. The bending test suggested that both the pure EMFA coating and the EMFA/PANI coating showed excellent flexibility of 2 mm.

Here, measurement of water absorption, adhesion strength, pencil hardness and impact resistance were conducted to evaluate coatings performance.

The study is published in: Progress in Organic Coatings Volume 134, September 2019, Pages 48-57.

Image Source: Pixabay

Additives for water-borne coatings


Additives for Water-borne Coatings

Water-borne systems are the coatings of the future. The market is developing an insatiable appetite for ecologically sound coatings based on renewable raw materials. The demands on coating performance are at least as high as those on environmental compatibility. Additives help to protect the environment by effectively reducing the use of organic solvents. Many of today’s water-borne coatings could not be formulated without them. When incorporated into water-borne paints, coatings and printing inks, they enhance both the production process and the performance of the applied inks and coating materials. Additives for water-borne coatings is a must read for formulators wishing to brush up on water-borne coating systems, as well as experts seeking to have detailed knowledge at their finger tips.

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