Plating & Coatings

Plating neodymium magnets is an important process to protect the magnet against its working environment. Below is a list of platings and their response to certain environments in regards to corrosion, durability, glueability, thickness, and price.

Plating Neodymium magnets is an electrolytic based process and can not be done after the magnet has been magnetized or "charged". All Neodymium Iron Boron magnets mused be plated to avoid oxidization. The majority of magnets we stock are Ni-Cu-Ni plated which is a 3 layer plating of Nickel, Copper, and Nickel. The final silver color nickel layer is exposed.
 


  Plating / Coating Indoor Use Abrasion Resistance Humidity Water Salty Air Salt Water Glue Thickness Price  
 

Nickel (Ni-Cu-Ni)

Excellent  Good Good Bad Bad Bad  Bad 10-20 Microns  Low  

Excellent Excellent Excellent Good Good Bad Good 8-10 Microns Low  

Superior Good Superior Superior Superior Superior Bad 10-20 Microns High
 

Black Epoxy (Ni-Cu-BE)

Superior Bad Superior Superior Excellent Excellent Good 15-25 Microns Medium  
 

Raw Epoxy (BE)

Superior Good Superior Superior Excellent Excellent Superior 10-20 Microns Medium  
 

Plastic (ABS)

Superior Superior Superior Superior Superior Superior Excellent 250-500 Microns High  
 

Teflon® (PTFE)  

Superior Superior Superior Superior Superior Superior Bad 250-500 Microns High  
 

Everlube®

Superior  Superior Superior Superior Superior Superior Good  8-25 Microns High   
 

Xylan®

Superior  Superior  Superior Superior Superior Superior Good 15-30 Microns High   

 

 

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.

 

Zinc Plating (Zn)

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.

 

Gold (Ni-Cu-Au)

Highly corrosion resistant and conductive. Usually coated with a base layer of Nickel, and copper, to bring out the natural shine of the gold. Works very well in water applications. The gold layer is very but still adds some cost to the magnet.
 

Black Epoxy (Ni-Cu-BE)

Black Epoxy plating is consists of 3 layers Nickel, Copper, and Epoxy exposed as the top layer. Great for outdoor applications. However, black epoxy is not as abrasion resistant as other platings. In harsh conditions the epoxy layer may be scrached off to expose the copper layer underneath.


 

Raw Epoxy (BE)

Raw Epoxy is designed specifically for gluing applications where the magnet requires a good adhesion to epoxy glue. This coating consists of one layer of epoxy covering the magnet.
 

Plastic (ABS)

ABS Plastic is highly corrosion resistant. This coating requires an injection mold to be created in order to encase the magnet. The plastic shell needs to be thicker than other coatings so the plastic can flow during the injection process. Multiple colors available.
   

Teflon® (PTFE)

Teflon is very resilient and can withstand harsh environments. It is highly corrosion resistant. An injection mold is required to create the shell around the magnet. There will be a noticeable mold seam around the magnet where the injection mold separates.
   

Everlube® 6155

Everlube 6155 is a aluminized barrier coating specially formulated to maximize adhesion and corrosion protection when applied to rare earth magnets. The coating is very durable and provides excellent chemical and corrosion resistance.
 
   

Xylan®

Xylan coatings are fluorocarbon coatings that contain dry lubricants. Slippery and highly corrosion resistant. Multiple colors available.

   

Gold (Ni-Cu-Au)
Highly corrosi

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