6. Surface preparation

The essential condition for the success of an electrolytic coating is to apply the coating to a clean surface.

• Three types of pollution should be considered:

  • particles;

  • organic contaminants (fats, amino acids, etc.);

  • oxides.

• The particles are removed by immersing the substrate in an ultrasonic bath for several tens of seconds to several minutes, often consisting of a chemical degreaser, but also during electrolytic degreasing.

  The ultrasound frequency will be carefully selected based on the size and complexity of the substrate, as well as its fragility.

• Organic contaminants...