3.1. Surface roughness
The plating process of the elements made of magnesium alloys according to the technological instruction does not always ensure that a coating of satisfactory quality is obtained. The use of mechanical cleaning, grinding, chemical cleaning, etching and activation is insufficient. The similar results could be noticed after manual polishing of the surface. In the technology processed in NTP company, the effectiveness of vibro-abrasive machining as the basic method for preparation of cast surfaces before plating process was used and verified. To verify the obtained results, the tests determining an influence of
individual processes on the quality of the obtained coatings were performed.