Electrostatic Spray Painting
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Description
Electrostatic spray painting is typical in the Automotive Industry for over 25 years. Car makers found that if you magnetically charged the particles of paint that you were spraying on a car body, these would be attracted to the metal and produce a uniform cover of paint with superb adhesion. This meant that the paint job was of better quality, less paint was used to cover the same surface, and the overspray, that cloud of drifting paint particles that got on everything and everyone was reduced to a minimum, thus making the operation safer and more relaxed for the workers.
For electrostatic spray painting to work well, the paint spray is blown through an electrostatic field. The droplets have to travel during at high speed so that they draw the electrostatic charge out of the field with them and do not provide it a possibility to return to the field. Once out of the nozzle, the droplets forming the spray cloud (pattern) are carrying the electrostatic charge, this charge is looking for a place to land and will be occupied to the adjacent grounded surface.
Again, for electrostatic attraction to take place the "target" surface must be grounded and have magnetic attraction, as in the case of the lift doors, which is steel that has been degreased and ready for electrostatic spray painting. If you were to cover the lift doors with a nylon cover, the droplets would look for another exposed metallic surface to land on before going towards the "insulated" door, unless they were aimed directly at that lift door, in which case they would depose in very much the same manner of a conventional (non charged) spray.
For electrostatic spray painting to work well, the paint spray is blown through an electrostatic field. The droplets have to travel during at high speed so that they draw the electrostatic charge out of the field with them and do not provide it a possibility to return to the field. Once out of the nozzle, the droplets forming the spray cloud (pattern) are carrying the electrostatic charge, this charge is looking for a place to land and will be occupied to the adjacent grounded surface.
Again, for electrostatic attraction to take place the "target" surface must be grounded and have magnetic attraction, as in the case of the lift doors, which is steel that has been degreased and ready for electrostatic spray painting. If you were to cover the lift doors with a nylon cover, the droplets would look for another exposed metallic surface to land on before going towards the "insulated" door, unless they were aimed directly at that lift door, in which case they would depose in very much the same manner of a conventional (non charged) spray.
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Electrostatic Spray Painting
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