Abstract
Measurements have been performed with different electrostatic powder coating systems to measure the electrostatic charging processes. The measurements consist of spraying a fixed mass of powder through a powder gun and then analysing the powder coating to determine the optimum parameters. The techniques, which are presented, include (i) the absolute determination of the charge/mass ratio for a tribo gun, (ii) the analysis of a powder deposition on a metalised glass substrate to determine the powder thickness and the adhesion of the powder to the substrate for standard and modified powder coating guns.
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