For examples: Head actuators for computer hard disks; Magnetic resonance imaging; Magnetic guitar pickups; Loudspeaker and headphones; Electric motors; Spindle and stepper motors; Drive motors for actuators; Electric generators for wind turbines. |
Neodymium magnet is an iron based permanent magnet, because of this, it is easy to be rusted or oxidation. To avoid such problems, the magnet coating, electrical plating or suitable surface treatment are needed.
Available Coatings for Magnets | ||||
Surface | Coating | Thickness (Microns) | Color | Resistance |
Passivation | 1 | Silver Grey | Temporary Protection | |
Nickel | Ni+Ni | 10-20 | Bright Silver | Excellent Against Humidity |
Ni+Cu+Ni | ||||
Zinc | Zn | 8-20 | Bright Blue | Good Against Salt Spray |
C-Zn | Shinny Color | Excellent Against Salt Spray | ||
Tin | Ni+Cu+Sn | 15-20 | Silver | Superior Against Humidity |
Silver | Ni+Cu+Ag | 10-20 | Silver | Superior Against Humidity |
Gold | Ni+Cu+Au | 10-20 | Gold | Superior Against Humidity |
Copper | Ni+Cu | 10-20 | Gold | Temporary Protection |
Epoxy | Epoxy | 15-25 | Black,Red,Grey | Excellent Against Humidity&Salt Spray |
Ni+Cu+Epoxy | ||||
Zn+Epoxy | ||||
Parylene | Parylene | 5-20 | Grey | Excellent Against Humidity,Salt Spray,Superior Against Solvents,Gases, Fungi and Bacteria,FDA Approved |
Chemical | Ni | 10-20 | Silver Grey | Excellent Against Humidity |