Spray painting
The spray painting is a method for coating of surfaces with paint .
The paint is mostly atomized by compressed air (2–6 bar) as it emerges from a nozzle with a spray gun . This method is used for small and flat parts, but has the disadvantage that the paint loss is relatively large.
Remedy provides the electric spray painting , it is especially useful for pipe construction and other complicated parts, as a coating on all sides takes place (electrostatic wrap-around). The electrostatic attraction by means of high voltage (40 ... 100 kV) charged paint droplets through the earthed workpiece is used. It has the further advantage that the paint loss remains low and the paint is evenly distributed. There are two procedures:
- the spray mist generated with compressed air is electrostatically charged and sprayed onto the grounded workpiece.
- the paint is atomized by the high field strength when flowing over an edge
With high pressure spraying , the paint is atomized more intensely than with spray painting. It is used for large areas and for the application of thicker layers and high-solids coating materials.
See also
Spray can , airbrush , electrostatics