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Wednesday, 18 September 2019
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Raw materials & technologies, Applications, Protective & Marine coatings

Testing the anti-corrosion efficiency of pigment particles in organic coatings

Thursday, 10 July 2014

The effect of pigment particle surface treatment with conductive polymers on the corrosion inhibiting properties of organic paints was investigated.

A waterbased epoxy resin were prepared for the investigation of the corrosion protection properties of the pigments

Source: IFAM

A waterbased epoxy resin were prepared for the investigation of the corrosion protection properties of the pigments

Source: IFAM

Mixed oxides possessing the spinel and perovskite structures were synthesised for the study. Natural graphite and pigments based on ferric oxide and silicate were studied. Coating materials based on a water-based epoxy resin were prepared for the investigation of the corrosion protection properties of the pigments, the surfaces of which had been provided with a conductive polymer layer. Laboratory corrosion tests were applied to the paint films. A commercial corrosion protection pigment, based on modified zinc phosphate, served as the corrosion protection efficiency standard.

Polymers improved mechanical properties

Polyaniline phosphate was found preferable to polypyrrole as the modifying agent of the pigment surface regarding the pigment's corrosion inhibiting efficiency. Surface treatment with the conductive polymers is also beneficial to the mechanical properties of the paint.

The study is published in: Progress in Organic Coatings, Volume 77, Issue 9, September 2014, Pages 1465-1483.

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