Electrocoating System
How e-coating works
E-Coating is a painting method that uses an electrical current to deposit paint on a part. The process works on the principle of "opposites attract". The e-coat system applies a DC charge to a metal part immersed in a bath of oppositely charged paint particles. The paint particles are drawn to the metal part, forming an even, continuous film over the entire surface, until the coating reaches the desired thickness. At that thickness, the film insulates the part, the attraction stops and the process is complete.
In cathodic E-coating, the part to be coated has a negative electrical charge that attracts positively charged paint particles in the paint bath. Cathodic coatings are high performance coatings that have excellent corrosion resistance, and can be formulated for outside durability for use on cars, appliances, outdoor furniture and other products. In Cathodic e-coating, lead-free products offer corrosion resistance equal to or better than prior leaded paint products.
Because parts are immersed in a bath of paint, electrocoating is a good method to coat parts with recessed areas that may be missed by spray applications. Electrocoat products are also environmentally friendly because they are waterborne and have very low Volatile Organic Compounds (VOCs). Hazardous Air Pollutants (HAPs) levels are also very low for E-coat products in general, and HAPs free formulas are available.
Electrocoating is designed to provide superior corrosion protection with uniform coverage, even on hard to reach part surfaces. Vulcan Electro-Coating offers an all-spray 8-stage zinc phosphate (non-chrome seal) pretreatment operation producing a primer with outstanding salt spray corrosion protection, and a black cathodic epoxy single component electrocoating process. A superior performance coating results when electrocoating is used in conjunction with Vulcan’s powder topcoat capability.Vulcan Electro-Coating coats parts and products for a wide variety of markets: truck & bus, automotive, furniture, construction, ductile iron fittings, agricultural, and recreational vehicle manufacturers. Value added services are available, such as surface preparation and assembly.
| Eight Stage (Spray Only) Pre-Treatment System | ||
|---|---|---|
| Stage I | Alkaline Cleaner | 115-125 F |
| Stage II | Conditioning Rinse | Ambient |
| Stage III | Conditioning Rinse (Halo) | Ambient |
| Stage IV | Zinc Phosphate | Up to 133 F |
| Stage V | City Water Rinse | Ambient |
| Stage VI | Conditioning Sealer (Non-Chrome) | Ambient |
| Stage VII | Re-circulating Deionized Water Rinse | Ambient |
| Stage VIII | Fresh Deionized Water Rinse | Ambient |
| Electrocoat Tank | |
|---|---|
| Paint | PPG Cathodic Epoxy Framecoat II |
| Color | Black |
| Time: | Two minutes, immersion |
| Thickness | 0.4 Mils - 1.1 Mils, Adjustable to Customer Specs |
| Voltage: | To 300 Volts D.C. |
| Amperage | To 500 |
| Temperature, Tank | Controlled Between 90 F - 95 F |
| Cure Oven: Natural Gas (Convection) |
|---|
| Pre-heat 7 minutes up to 350 F |
| Bake 23 minutes up to 500 F |
| Conveyor: Monorail | |
|---|---|
| Hook Spacing | 12 Inch |
| Speed: | Up to 16 F.P.M. |
| Weight Capacity: | 200 Pounds per Hook |
| Part Window: | 3 Feet Wide, 5 Feet High, 9 Feet Long |
