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How to choose the appropriate coating for a magnet?

Bruce Tang   2024/09/02

Magnets are vital components in many industries, but they are prone to damage from corrosion and physical impacts, such as Neodymium magnets, SmCo magnets and etc.

Coating magnets is essential to protect them from environmental factors, enhance their durability, and improve performance. Coatings not only prevent rust and chipping but also offer aesthetic appeal and functional advantages, such as better adhesion and thermal stability. Whether you're an engineer looking to improve product reliability or a manufacturer seeking ways to upgrade your processes, understanding different surface treatments for magnets is essential.

‍ The main purpose of coating for magnets:  


  • Corrosion resistance
  • Color decoration
  • Abrasion resistance
  • Glueability
  • Mechanical strength
  • ……

 The coating types available with X-Mag:  

  • Au
  • Black Epoxy
  • Black Ni
  • Black Zn
  • Blue White Zn
  • Everlube
  • Color  Zn
  • Gray Epoxy
  • NiCuNi
  • Ni+Cu
  • Ni+Sn
  • Parylene

When choosing a coating for a magnet, consider the following factors:  


  • Colour
  • Layer thickness
  • Cost level    
  • Heat resistance ability    
  • Corrosion resistance ability in humidity/water    
  • Corrosion resistance ability in salty air/salt water 
  • Glueability
  • Abrasion resistance
  • Electrical Insulation
  • ……


You can get the comparison of different coatings for magnets in the table below.



 In-house surface treatment facilities/lines in X-Mag:




You can contact us to get coating recommendations from our surface treatment engineer Bruce Tang. Please refer to his professional experience here.


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