Epoxy floor pinhole causes and solutions

Epoxy floor coating after the coating due to the rapid evaporation of solvent, so that the paint liquid too late to supplement, and the formation of many small circles, small holes or like leather pores such as needle hole phenomenon. The diameter of the pinhole is generally small, about 100um, and the largest is a few millimeters, forming a cone or hemisphere. This is most likely to be the case with paints with a varnish and a low pigment content applied by spray and roll coating. The causes of pinholes, preventive measures and solutions are as follows: Causes Prevention and control methods Coating construction viscosity is too high, the construction site temperature is low, after the coating is stirred for too short a time, there are still residual bubbles construction viscosity should not be too large The temperature of the construction site should not be too low. After the paint is agitated, it should be left for a period of time. After the air bubble runs clean, the construction solvent is improperly mixed. The amount of the low-boiling volatile solvent is too much, which causes the coating film surface to dry quickly. The solvent at the bottom is not easy to escape. The amount of low-boiling-point solvent is used in the coating. There is moisture in the coating. Dust in the air. The moisture in the coating and the dust in the air should be removed before the application. Construction on the surface of the sweated and oiled material The surface of the coating should be cleaned and then applied. During construction, the pressure of the spray gun is too large, the nozzle diameter is too small, and the distance between the spray gun and the object surface is too far. The technical environment of the spray gun is too high. Attention should be paid to the environmental humidity of the construction site. The leveling property of the coating is poor, and the poor bubble release is adjusted. The surface temperature of the object is too high. Note that the surface temperature of the object should not be higher than the ambient temperature during construction.

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