THE ELECTRO-COATING PROCESS
The demand for higher quality and durability is what is expected by our customers. At Electrocoat we offer a service that does that.
E-coating is an organic coating method that uses electrical current to deposit paint onto a metal part or assembled metal product. The process works on a principal of “Opposites Attract”. This process is also known as electro-deposition.
At Electrocoat we use the Cathodic Electro-deposited method, the most popular technology, because of its superior adhesion and corrosion protection properties.
The electro-coating process can be divided into four distinct sections.
- ELECTROCOAT BATH AND ANCILLARY EQUIPMENT
- POST RINSES
- BAKE OVEN
Pre-treatment: Parts are cleaned and phosphated to prepare the metal for the paint application. This is an essential process to achieve performance requirements, to ensure a high quality finish and to keep the paint bath clean.
The Electrocoat bath: This is where the coating is applied. The bath consists of deionized water and paint solids. The deionized water acts as the carrier for the paint solids. The solids consist of resin and pigment. The resin is the backbone of the final paint film and provides corrosion protection, durability and toughness. The electro-coating process is driven by a DC rectifier, used to regulate and control the paint film build on the parts.
Post rinses: As the painted part exits the bath, paint solids cling to the surface and have to be rinsed off to maintain efficiency and aesthetics. The excess paint solids are returned to the tank.
Bake Oven: The bake oven receives the parts after they exit the post rinses. The bake oven cross links and cures the paint film at a temperature of 180 degrees.