Metal coating

In these, the depth of the base material can be controlled. They involve a structural transformation and can be done manually, automatically or semi-automatically, even continuously or discontinuously.

Those processes that use chemical reactions to add metal coatings and thus give a new layer to the surface. Some treatments are called thermochemical because they combine the previous process with this one.

The difference with the previous process is that in this one, electric currents are used to ensure the adhesion of the metal ions.

These include techniques that are becoming increasingly popular due to their low cost. They modify metal surfaces to reduce oxidation, corrosion, and wear. Examples include carburizing and deposition.

Here are classified those treatments that, instead of adding, remove excess material from surfaces. Generally, they are used to rectify the assembly of parts.