SUCHÁNKOVÁ Kateřina VSB - Technical University of Ostrava


Waterborne coating systems with the addition of pigment particles in the submicron sizes govern the overall properties of the coating film. When properly use (adjusted) pigment nanoparticles can increase the corrosion properties (delivery substances to eliminate sedimentation and coagulation an anticorrosive zinc phosphate pigment particles), but depending on the type of film-forming substances in the coating can lead to a reduction of cohesive properties of coatings. Attenuation cohesive coating properties of the film lies in admixture additives (dispersants) prevent coagulation of particles. Industrial segment offers stabilizers and dispersants dealing with the issue of particles coagulation, but also affect the paint. The chemical and physical nature of the dispersed, weakens the joining of individual components in the paint. For this reason it is necessary to take into account not only the anticorrosion, but also on the technological, cohesion properties of the resulting film. This paper deals with the effect of anticoagulant resource supplied to the film during application, its influence on anticorrosion, technological, strength and cohesive properties of coatings. In water-based paint (alkyd and acrylic base) was added finely disintegrated nontoxic pigment zinc phosphate and unstabilized in the state, stabilized by an industrial dispersant and pH adjustment coatings. The results of anticorrosive tests show the suitability of industrial dispersant on anticorrosion properties in an environment with a degree of corrosivity C5, but also deterioration of cohesive properties of the coating film.