neodymium magnet can be coated zinc,nickel,epoxy,gold and sliver. There're some difference between them.
1.Zinc and nickel plating are common used.Because they're cheaper.Compared with zinc, Nickel coating is more expensive ,beautiful,anti-corrosion than zincs.
2.Epoxy plating is widely in water.Because it can protect the magnet to avoid rust in water.
3.Gold and sliver plating usually used in jewelry and ornaments .The cost of them is more expensive.Due to gold and sliver view as luxury products.
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