The main purposes of a primer paint are as follows
Adhesion to the substrate: It is in the primer layer that the subsequent layers will be applied,
so these must be strongly adhered to the substrate so that the scheme fulfills what is expected
of it. The primer is a high adhesion paint. There are specific primers for each material, such as
metals, plastics, wood, among others. For its application it is necessary that the part to be
applied with the primer is also clean and in painting conditions.
Cohesion – High internal resistance: The anti-corrosive protection of a paint system is included
in the primer. It can be conferred by having corrosion-inhibiting pigments, such as zinc
phosphate (the same used in the phosphatization process) or by pigments that provide
cathodic protection to the steel, such as Ethyl Zinc Silicate. If the primary ink does not contain
any of these pigments, then it will have a very strong barrier effect, which prevents the entry
of moisture.
Inertia – Strong resistance to corrosion and chemicals;
Adhesion – Necessary to the subsequent coat of paint;
Distension – Adequate flexibility to the substrate where it was applied; Infinity Pro concord paiting houses

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