How to control Coating coating bubble

 There are usually two reasons for coating foaming: one is due to poor control of the coating production process, such as solvent or resin containing water and pigments and fillers being damp, etc.; the other is due to inadequate coating construction management. Therefore, to control coating foaming, on the one hand, it is necessary to control the coating production process, and on the other hand, it is necessary to control the coating.

1. Strengthen production management

During the production of coatings, strictly control the water content of the pigments, fillers and solvents used; in the primer formula, avoid the use of soluble pigments and fillers; use solvents to take into account their volatilization balance and avoid excessive solvent residues; in high humidity environments, Use a base with low penetration.

2. Strengthen construction management

Avoid high temperature, humidity and other adverse weather conditions during construction. The surface humidity of the coated equipment should be kept above the dew point temperature of 3°C, and the relative humidity should not be higher than 85%. After making it dry, you can apply a coat of paint; before construction, the paint should be diluted and stirred and then allowed to stand for a period of time before painting. In particular, the double material should have a certain aging period, so as to avoid uneven mixing and heat generated by the reaction, causing Bubbles; control the thickness of the coating to reduce its water resistance; control the degree of surface grinding, too much roughness will easily produce leaks and cavities, which will inevitably cause bubbles; after pretreatment of the substrate, the surface must be kept clean without leaving electrolyte, Dust, grease and other impurities that affect the adhesion of the paint; when using and storing the product, try to avoid high temperature and high humidity environments to reduce the chance of direct contact with water; when painting porous substrates, you should first paint the sealant with good permeability Primer, try to get rid of residual air, solvent and other residues in the hole.