Enhancing the anti-corrosion property of epoxy resin

A new work depicts a modification method by using nanofillers for simultaneously improving the barrier and corrosion inhibition in epoxy coatings.

The coated railing of a ship at sea.
The nanomaterial-loaded epoxy coating can greatly improve the composite's anti-corrosion ability. Image source: cocoparisienne - Pixabay (symbol image).

In this method, polyaniline (PANI) nanofibers are first grown on reduced graphene oxide (RGO) using an in situ polymerization reaction, and then cerium phosphate (CePO4) nanograins are directly modified onto polyaniline/reduced graphene oxide (PANI/RGO) composites using a hydrothermal reaction. By this, a new hydrophobic and corrosion-resistant PANI/RGO/CePO4 nanocomposite is successfully prepared.

Corrosion inhibition effect

PANI/RGO/CePO4 nanomaterials were then compounded into epoxy resin and sprayed on Q235 carbon steel. Test results show that PANI/RGO/CePO4 nanocomposites improve the barrier properties of epoxy resin. In addition, X-ray photoelectron spectroscopy showed that the cerium ions and phosphate ions released from CePO4 in the composite had a corrosion inhibition effect.

The study has been published in Progress in Organic Coatings, Volume 178, May 2023.

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