The Automotive Primer is the first coat applied directly to the surface of the surface-pretreated substrate. The role of the primer is to prevent rust and enhance the adhesion of the topcoat to the substrate. Not only that, but the primer also has a great influence on the quality of the vehicle body coating and the decorative properties.
The choice of automotive repairing primer should be determined according to the type of substrate to be repaired, the coating conditions, the coating system and the matching intermediate coating and topcoat layers. If improperly selected, it will often cause "filming" or "peeling" and other paint film diseases. At present, 90% of automobile manufacturers use cathodic electrophoretic coating (CED) as the main primer; there are five types of repair primers commonly used in automobile maintenance coating operations: cathodic electrophoretic coatings, alkyd primers, nitros Primer, epoxy primer, acrylic primer.
(1). Cathodic electrophoretic coating: has three different levels of corrosion protection.
(2). Alkyd primer: good adhesion and rust resistance.
(3). Nitro-based primer: It has the characteristics of fast drying and hard film.
(4). Epoxy primer: hard and durable, chemical resistant
(5). Acrylic primer: strong adhesion, heat resistance, rust resistance, mildew resistance and so on.
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