After any magnet is placed for a period of time, spots of other colors will appear on the surface, gradually rusting, and it is not easy to rust after plating. The following reasons are that the air circulation, humidity and temperature difference change greatly, the dirt on the surface before magnet plating is not well cleaned, the electroplating time and technology are insufficient, and the magnet is oxidized by magnets such as broken magnet packaging seals.

Generally speaking, magnet plating For the special working environment used by the motor, the magnet is relatively wet, and the surface plating treatment must be carried out. At present, the main coating technology of magnets is galvanizing, galvanizing, galvanizing, nickel plating, black nickel plating, gold plating, silver plating, epoxy coating. 

Zinc plating and nickel plating are the most common coating techniques, and the zinc plating surface color is different, and all prices are different. The galvanized surface is silver and can be tested for salt for 12-48 hours. If the galvanizing effect is good, it can be stored for about 25 years, which is also the advantage of galvanizing price. 

The galvanized surface is silver and the luster of the adhesive is obviously different, but galvanized. Products that pass the salt spray test may also rust in long-term storage and harsh working environments. In general, in order to eliminate the rust of magnets, it is most effective to use electroplating for anti-corrosion.