Patent ID: 8480872

Claim:
A system for electrocoating a metallic substrate, wherein the metallic substrate defines a drain hole and an internal surface, the system comprising: a main DC power supply having a calibrated voltage; a primary electrode configured to transmit an electrical current through an electrolyte fluid when energized by the DC power supply; and an auxiliary electrode positionable within the drain hole, including: a stainless steel wire having a first end and a second end, wherein the first end includes a plurality of extensions each positioned to receive the electrical current transmitted through the electrolyte fluid by the primary electrode, and wherein the second end positioned adjacent to the internal surface; a porous stopper that positions the stainless steel wire within the drain hole, and allows the electrolyte fluid to flow to and from the internal surface; and a voltage booster configured to boost a calibrated voltage from the main DC power supply at the second end; wherein the auxiliary electrode receives the electrical current from the electrolyte fluid at the first end, and boosts the calibrated voltage from the main DC power supply in proximity to the drain hole at the second end; and wherein the internal surface is in fluid communication with the electrolyte fluid only through the drain hole.