Abstract
The effect of pigment particle surface treatment with polyaniline and polypyrrole on the corrosion inhibiting properties of organic paints was investigated. Mixed oxides possessing the spinel and perovskite structures were synthesised for the study. Coatings based on an alkyde resin were prepared for the investigation of the corrosion protection properties of the pigments, the surfaces of which had been provided with a polyaniline and polypyrrole layers. Laboratory corrosion tests were applied to the paint films. Polyaniline phosphate was found preferable to polypyrrole as the modifying agent of the pigment surface regarding the pigment’s corrosion inhibiting efficiency.
Highlights
Conductive polymers are promising materials that are beneficial in protective anti-corrosion paints [1,2,3,4,5,6]
Inorganic nanoparticles in the composites are coated with a conductive polymer layer, which improves the physical properties of the material [18]
3 Results and discussion 3.1 Pigment particle morphology The pigment particle morphology was examined by an scanning electron microscope (SEM) using an SEI detector
Summary
Conductive polymers are promising materials that are beneficial in protective anti-corrosion paints [1,2,3,4,5,6]. It is hoped that conductive polymers may replace corrosion inhibitors containing heavy metals. Inorganic nanoparticles in the composites are coated with a conductive polymer layer, which improves the physical properties of the material [18]. Pigments that are coated deliberately with a thin layer of polyaniline have been used in many studies aimed at creating a new anti-corrosion pigment that could provide the highest level of protection to metallic surfaces coated with it [20, 21]. In view of the specific properties of paint fillers and of the different corrosion conditions, it is necessary to find pigment particles with morphological and physicochemical properties that would not affect adversely the stability of the film-forming component of the paint binder or the physical properties of the cross-linked polymeric paint [26]
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