Electrostatic Coating

Electrostatic coating is the application of charged paint particles to a workpiece with an opposite charge.  Charged powdered particles or atomized liquid paint is initially projected toward the conductive workpiece by a mechanical or compressed air spraying method and then accelerated toward the workpiece by the powerful electrostatic charge.

Process Characteristics

Utilizes a high voltage applied to workpiece and sprayer
Is 95% paint-efficient due to reduced overspray and better "wrap-around"
Can be an automatic or manual process
Materials can be in a powder or a liquid form
Workpieces must be conductive
Workpieces are usually baked after coating

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Information provided is from Manufacturing Processes Reference Guide by Robert H. Todd, Dell K. Allen, and Leo Alting.--1st ed. Published by Industrial Press Inc., 1994.