Why primer, what is its function? Primer – a group of materials that constitute a suspension of pigments or their mixtures with fillers in a film-forming substance. Primer after drying forms an opaque uniform film. Primer (impregnating composition) – is necessary and important component 'tool' general repairs. The main purpose of the primer: to strengthen the surface and provide high-quality bond (adhesion) machined surface and subsequent layers of decorative, adhesive or leveling composition. Particles of this composition, very small and penetrate into the pores of the material, close them, reinforce the base, glue the smallest dust and micro-delamination. Thereby achieving a uniform surface.
Primers on a special 'responsibility': a multi-layer surface finish, they form the first layer – high strength – so to primers imposed very strict requirements. In this regard, experts recommend using only professional primer. There are several types of primers. Hear other arguments on the topic with Glenn Dubin. – Helps to hide stains and discolored areas on the coated surface – Reduces the smell of paint – Improve contact with a surface coating – Improves shine gloss coatings / enamels – Let's apply the lighter colors on darker surfaces – Align porous surfaces – Make a smooth and uniform coating There are several types of primers: – Insulating primer provide a low permeability of the film, preventing the penetration of moisture, corrosive environments to the painted surface to GF-021 suit. Usually, such a primer is added iron minium, zinc oxide (zinc oxide), and others – contain passivating primer composed of pigments that can passivate the metal. This is primarily a variety of chromates and phosphates, which when administered in the primer, even in small quantities on the surface of the metal forms a protective oxide film that prevents corrosion coating such as CS-059. – Sacrificial primers contain a of up to 90% of the metallic pigments (powders of zinc, zinc alloy with magnesium, lead). Protection of metal primer tread due to the fact that when in contact with the electrolyte material paint containing zinc powder, cemented zinc corrosion products, forming a compact layer of the film, which becomes impenetrable.
– Phosphating primers used for phosphating surfaces of ferrous and nonferrous metals such as FL-03K primer. Primers facilitate the passivation of metal phosphating and it greatly increases the adhesion of the film, as the blacks, and to the non-ferrous metals. – Primers, Rust converters are applied directly on the surface, which is not removed the corrosion products (rust, scale). The composition of primers include phosphoric acid, which makes these products in the insoluble phosphates of iron. These primers together with transformation creates rust on the surface of a polymer film that gives corrosion resistance throughout the coating. Priming should be done at all stages of finishing. To cover is strong enough and reliable ground must have the same absorbency, this quality provides the foundation primer, applied before each new layer of material. Priming of the same must hold before painting works (painting on primed surface better and more economical). Primers are applied to the base before applying the next layer of finish, with paint brush or roller, in a or several layers – depending on the properties of the workpiece. Thus, in a very loose footing with large water absorption, such as aerated concrete, we recommend double or multiple coating to a uniform film across the work surface. Using a primer will provide you cover beautiful appearance and long-lasting intense color.