Ndfeb strong magnet contains a lot of neodymium and iron, put a period of time after the surface appear white or other color spots, slowly development will become rusty spot, generally under normal circumstances, electroplating magnetic coating is not easy to rust spots.
The cause of rust spots tend to have the following kinds:
1. The magnet stored in damp, liquidity is not good, air temperature changing place;
2. The dirt on the surface of the magnet before electroplating clean;
3. The plating time is not enough or process problems.
4. The magnet packing seal damage caused by the magnet oxidation.
Ndfeb strong magnet qualified plating products, under normal circumstances, the magnet plating coating surface should not be rust spots.
Ndfeb strong magnet should avoid the following storage mode:
In too humid, the air the place with bad liquidity, the temperature difference is bigger, even the salt fog test qualified products long stored in the bad environment can produce rusty spot. When plating products stored in a harsh environment, base layer to further react with water, will cause the base layer and the adhesion strength of the coating is reduced, serious when still can cause local pulverization, basal and natural peeling. Electroplating products should not be placed in high humidity places for a long time, should be placed in a cool, dry place.
The preservation of the powerful magnets:
1, magnets in must maintain indoor drafty when stored in dry and humid environment magnet produces rust easily otherwise.
2, environmental temperature, do not exceed the maximum working temperature of magnet, not plating products can be appropriately when stored in oil rust;
3, the magnetization product storage should be away from sensitive to magnetic field of the object.
4, magnet material is brittle, transportation, plating (coating), the installation process, should ensure that magnets are not affected by severe impact.
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