Please wait.'

Page is loading'


Home  > Raw materials & technologies  > Raw materials  > Coatings binders  > Nanoferrite dispersed waterborne epoxy-acr...

Sunday, 15 September 2019
pdf
Raw materials & technologies, Raw materials, Coatings binders

Nanoferrite dispersed waterborne epoxy-acrylate replaces solventborne polymers

Wednesday, 14 January 2015

Waterborne epoxy acrylate-butylated melamine formaldehyde (EpAc-BMF) coatings and ferrite (Fe3O4) dispersed nanocomposite (EpAc-BMF-Fe3O4) coatings have been developed with a view to effectively replace the hazardous solventborne polymeric coatings.

PDP and EIS studies show the superior anticorrosive behavior of these coatings. Source: artSilense.com/Fotolia

PDP and EIS studies show the superior anticorrosive behavior of these coatings. Source: artSilense.com/Fotolia

The physico-mechanical properties of these coatings were studied using standard protocols. Electrochemical measurements were made in 3.5wt% solutions of NaOH, NaCl and HCl as well as in tap water (Cl ion 63mg/L; Conductivity 0.953mS/m). The salt spray test on coated and uncoated MS was carried out in 5wt% NaCl solution for 600h. Fe3O4 nanoparticles in matrix act as filler, which fill the pinhole, interstitial crosslinked spaces and other coating artifacts (micro cracks and voids) regions besides provide strength to the coating material.

Forming a strong barrier layer

Electrochemical studies revealed that EpAc-BMF-Fe3O4 coatings were found to be effective in restricting the penetration of aggressive ions by forming a strong barrier layer at coating metal interface. Among various compositions of EpAc-BMF-Fe3O4 coatings, EpAc-BMF-Fe3O4-2.5 coatings have shown highest corrosion protection efficiency in different corrosive media.

The study is published in: Progress in Organic Coatings, Volume 80, March 2015, Pages 77–86.

top of page
Comments (0)
Add Comment

Post comment

You are not logged in

register