Magnet Coating

The process of coating is an important way to protect the magnet in order to against corrosion. The substrate NdFeB(Neodymium, Iron, Boron) will oxidize quickly without a protective layer. Below is a list of coating and their effectiveness in certain environments.

Nickel (Ni-Cu-Ni) —— The most common plating.

Ni-Cu-Ni is a durable 3 layer (nickel, copper, nickel coating). Great for indoor use. They may be used outdoors if protected from rain and humidity. Good abrasion resistance.

Black Epoxy (Ni-Cu-BE) —— 防腐蝕性能優，為粘結釹鐵硼首選

Black Epoxy plating is consists of 3 layers Nickel, Copper, and Epoxy exposed as the top layer. Great for outdoor applications.

Zinc Plating (Zn) —— use trivalent chromium coating

Zinc is a standalone (one layer) plating. Zinc is self- sacrificing, meaning when it starts to oxidize the outside turns white creating a durable layer of protection.

Other Coating Surface

Gold (Ni-Cu-Ni-Au)

A very thin / cosmetic layer of gold. Usually produced with an underlying layer of nickel to create a brighter finish.

無鍍層 —— 僅適用於臨時保護作用