Introduction of electrostatic spraying process

Electrostatic spraying refers to a coating method that uses corona discharge principle to make atomized coating negatively charged under the action of high voltage DC electric field and adsorb it on the surface of positively charged substrate to discharge.

It can also be understood as a new drawing method designed by using the basic characteristics of like charge repulsion and opposite charge attraction. With the help of DC high-voltage electric field, the paint mist sprayed by the spray gun is atomized more finely, and at the same time, the paint mist is charged and deposited on the surface of workpieces with different charges by electrostatic attraction, forming a uniform paint film, thus achieving the purpose of painting. It is an efficient painting method that combines mechanical atomization with electrostatic attraction and repulsion.

Extended data

Compared with the traditional painting process, electrostatic spraying technology (electrostatic plastic spraying) has obvious advantages:

1, good construction environment and working conditions. When spraying in high voltage electrostatic field, the diffusion of paint mist is much less than that of air pressure spraying or airless spraying, which obviously improves the pollution of painting environment.

2. The coating has excellent appearance quality, strong adhesion and high mechanical strength;

3. The curing time of spraying construction is short;

4. The corrosion resistance and wear resistance of the coating are much higher;

5, no primer is needed; Simple construction and low technical requirements for workers;

6, the cost is lower than the coating process;

7. Some construction occasions have clearly stated that electrostatic plastic spraying technology must be used;

8, electrostatic powder spraying process will not appear in the painting process of common flowing phenomenon.

References:

Baidu encyclopedia-electrostatic spraying