Patent ID: 9255340
Filing Date: 2016-02-09
CPC Classification: B08B,C25D

Claim Text:
1. A method of coating a conductive workpiece having an interior comprising an interior surface and an exterior comprising an exterior surface; the method comprising: (a) positioning the workpiece in a mixture containing a coating material; (b) positioning in the mixture, and exterior to the workpiece, an exterior electrode connected to a switching system; (c) positioning in the mixture, and interior to the workpiece, an interior electrode connected to the switching system; (d) applying a first potential between the workpiece and the exterior electrode to cause the coating material to deposit on the exterior surface of the workpiece; (e) applying a second potential between the workpiece and the interior electrode to cause the coating material to deposit on the interior surface of the workpiece; (f) monitoring one or more parameters during steps (d) and (e); and (g) individually switching on or off current to the exterior electrode and interior electrode automatically to control the deposition of the coating material on the interior surface and the exterior surface based on information received from the one or more parameters during steps (d) and (e).