An electrocoating system that is highly automated and results in a high performing finish that delivers a uniform film build, color consistency, high yield rates and applied cost efficiency, in an environmentally friendly finishing system. PPG (Electropolyseal) is the leading provider of e-coat chemistry worldwide, and have variations suitable for nearly every corrosive environment.

Electropolyseal for fasteners generally follows one of the following approaches, depending on the fastener substrate and specific application.

• Conventional zinc phosphate base, which is applied via the barrel immersion process. The cationic electrocoat product is then applied via bulk processing electrolytically to the fastener. After rinsing, a torque modified post dip is then applied to the part and it is cured. The film build of this finish is 15-20 microns.
• One coat of zinc phosphate base. The finish is cured at this point. This base coat of zinc-rich is then topcoated with cationic electrocoat in a bulk application. A torque modified post dip is used after the electrocoat, and both finishes are cured concurrently. The film build of the basecoat is 7.5-10 microns, and the total film build is 15-20 microns.
• Combination of a plated substrate and cationic electrocoat. The electrocoat film can be either epoxy or acrylic based. The parts are electroplated and passivated. The electrocoat is applied in bulk. A torque modified post dip can be added to this finish when torque tension characteristics are critical. Film build on the plated finish is 7.5-10 microns. Total film build is 15-20 microns.

Key Features and Benefits

• High corrosion resistance
• No hydrogen embrittlement
• Torque tension controlled finishes
• Multiple color offerings
• No recess head fill
• No thread fill
• Reduced rejects
• Relatively environmentally friendly
• Chrome and lead-free
• Dry to touch
• Automotive Industry approved products