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Tuesday, 24 September 2019
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Raw materials & technologies, Raw materials, Coatings binders

New approach to prepare corrosion-resistant epoxy coatings

Tuesday, 7 February 2012

The aminic hardener of these coatings contains submicron emeraldine-base polyaniline. Processing of the hardener through this approach resulted in the formulation of an epoxy coating with superior corrosion protection properties.

Epoxy coatings containing emeraldine-base polyaniline hardener show superior corrosion protection properties.

Source : Marcin Chodorowski - Fotolia.com
Epoxy coatings containing emeraldine-base polyaniline hardener show superior corrosion protection properties. Source : Marcin Chodorowski - Fotoli...

Researchers of the Amirkhabar University of Technology (Teheran, Iran) have developed a new approach to the preparation of special corrosion-resistant epoxy coatings. The aminic hardener of these coatings contained emeraldine-base polyaniline (EB-PANi). The state of dispersion and dissolution of these coating materials, during different stages of preparation, were characterized by optical microscopy and scanning electron microscopy. The corrosion resistances of resulting coatings were measured by electrochemical impedance spectroscopy (EIS) and salt spray methods. As little as 0.5% EB in initial mixture of EB-hardener compositions led to relatively better corrosion protection of resulting coating compared with neat resin coating. Presence of initial 2.5% of EB in the hardener and its processing through this approach resulted in the formulation of an epoxy coating with superior corrosion protection properties. The complete study appeared in "Journal of Coatings Technology and Research”, vol. 9, No. 1, January 2012, pp. 47-57.

To the abstract of the study

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