Finishing: E-Coating

What is Electrocoating (E-coating)?

The electrocoating process, also known as E-coating, is similar to electroplating, except it is used to coat an object with paint instead of metal. This process is performed using a water based solution and an electric current in order to produce a uniform coat of paint over the entire surface of the object. E-coating produces high-quality, low-cost finishes and can be used on complex parts since it can coat any surface that can be reached by the liquid.

 

E-coating Process

The part is placed into a water-based solution which contains a special formula of paint which allows an electric current to travel from one paint particle to another. When the current is applied, the positively charged paint particles travel through the solution towards the negatively charged part then adhere to the surface. The particles build up an insulating layer on the surface preventing the electrical current from passing through any further and, therefore, preventing any more paint from attaching resulting in a smooth and even coating. The E-coat is then cured at a temperature determined by the materials used.

 

Benefits of E-coating

There are a number of benefits of electrocoating, among them are:

  • Environmentally friendly
  • Cost efficient
  • Increased line productivity
  • Provides a chemical and corrosion resistant finish
  • Can be used on complex parts