Suitable paint:

Water-based paints are generally electrically conductive. Solvent-based coatings must have a minimum required conductivity to be able to charge the material particles, which are then conducted towards the workpiece by the field lines of the high voltage. The material manufacturer should be contacted if there are any questions.

Conductive workpieces:

Application with electrostatics is most suitable for electrically conductive workpieces, especially those made of metal. The resistance of the workpiece should not exceed 1MO. Wood is also suitable if a certain residual moisture of at least 15% is present in the workpiece. In addition, non-conductive workpieces made of plastic or glass are also frequently coated with this technology. However, special pretreatments are necessary here. In some cases, it is sufficient to apply a conductive primer beforehand - as is the case, for example, when coating glass bottles (see picture) - or to start coating directly at the grounding point, so that the conductive paint layer, which is still liquid, creates a conductive connection to the grounding point. In all cases, ensure optimum grounding of the workpiece.

Very good grounding:

The greatest possible cleanliness, especially at the electrical connections and grounding lines, as well as at the tools, is a basic requirement for proper grounding and thus for the best possible electrostatic effect. Only in this way can as much material as possible reach the workpiece and the application efficiency be maximized. Any kind of deposits and residues can cause grounding interruptions or creepage distances that prevent the positive electrostatic effect.

Workpiece geometries:

More complex bodies with lattice structures or round bodies are particularly suitable for coating with electrostatics, since the coating material also reaches the rear side of the workpiece due to the wrap-around effect, resulting in the greatest material savings. The time required for coating per workpiece can be significantly reduced.

The field lines of the electric field always strike the workpiece perpendicularly - even on the side facing away from the spray jet. This results in a number of advantages for the painting process. Thanks to its high application efficiency, the electrostatic process is also particularly economical and environmentally friendly.

Gripping effect:

The workpiece is also coated on the reverse side facing away from the spray jet.

Fine atomization:

In addition to conventional atomization, the repulsive forces ensure smaller droplets. Depending on the situation, electrostatics can be used to lower the material and air pressure even further, thus achieving smoother atomization with even smaller droplet size.

Uniform coating quality:

The charged paint droplets travel along the field lines to the workpiece and strike it vertically and evenly distributed as they repel each other. This results in a high surface quality.

Optimum edge coating:

By concentrating field lines at the corners and edges of a workpiece, undercoating at these points is avoided.

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