The basic process is: Ingredients - caustic washing - water washing - Pickling - water washing - Plating- Water washing - drying - test - storage. In actual production. Plating layer of protection prevailing lack of poor performance point. On the one hand this is related to the technology itself, such as plating bath composition and stability of pre-treatment system,Plating process and so on. The other hand, sintered NdFeB magnet material with the characteristics of a great relationship. First, the magnet The Nd is a lively strong element, it is extremely easy and the environment in some of the elements in a chemical reaction
Lead magnet corrosion; secondly, because the sintered NdFeB-type using powder metallurgy method has been applied to suppress forming and the most
Final sintering made of. Therefore, the magnet surface, rough, porous, in the plating process is difficult to avoid the-Free water, acids, alkalis and bath infiltration; In addition, the electroplating process, the workpiece as a cathode, the precipitation of hydrogen It is also difficult to avoid. Taken together these factors often leads to brittle magnet after plating, powder, whitening And coating bubbling, therefore, in the electroplating process should take the measures set out to get a good coating. In addition, the plating of the environmental pollution is also a matter of concern.