| NickelNi-Cu-Ni |
> 48 hr |
10 - 30 µm |
Silver shiny |
- A standard surface treatment for neodymium magnets.
- Suitable for indoor use.
- Great performance/price ratio.
- The surface treatment is with a copper (Cu) layer for better adhesion.
|
| Zink Zn |
> 24 hr |
6 - 15 µm |
Silver/blue Shiny |
- A standard surface treatment, with a more matte finish than Nickel.
- Preferred if you need to avoid nickel (eg allergy) and need to have a slighty matte surface for better adhesion for eg marking and tape.
- Suitable for indoor use.
- Great performance/price ratio.
|
| EpoxyNi-Cu-Epoxy |
> 96 hr |
10 - 30 µm |
Black shiny |
- Perform better in humid environments.
- More expensive production cost than NiCuNi and Zn, especially in smaller orders.
- We use (on request) an extra layer (eg Ni-Cu-Ni-Epoxy) below the Epoxy to give the magnet further protection.
|
| GoldNi-Cu-Au |
> 12 hr |
10 - 15 µm |
Gold shiny |
- The gold plating is mostly for the look and does not directly have any practical function.
- The price of this treatment is higher in comparison to NiCuNi and Zn.
|
| Rilsan |
< 1mm corrosion
after 2000 hr |
|
Black shiny |
- The best surface treatment to protect against moisture. The default is black surface.
- Rilsan/Thermoplastic means more production steps, longer production time and a more expensive final product.
- The slighty thicker scratch/plastic surface gives the magnet a slighty worse dimension tolerance.
- The safest treatment to use in for example, food production and where eg medical requirements are set, such as in dialysis machines.
|
| Parylene |
> 96 hr |
3 - 10 µm |
Transparent |
- FDA-approved coating for use when the magnet should sit in the body.
- Good protection against moisture, water and salt water. The coating will slowly but surely corrode in salt water, so an undercoating may be needed.
- Relatively easy to get scratches/damage due to the thin coating, after that the magnet can corrode easily. Can be double treated with Parylene, but this increases the dimensions of the magnet. Check tolerances first.
|
| Rubber |
|
0.5 - 1 mm |
Black |
- If new/own dimension is wanted, this treatment is only produced in large quantitys since it needs a tool for a new dimension.
- Improved shear force. Shock, scratch and water resistant! This makes it ideal for outdoor use and tough conditions.
- Small sized magnets cannot be rubberized.
- Since the thickness of the coating it has lower strength compared to a neodymium magnet of silimar dimension with other coating.
|
| Phosphated |
|
1 - 3 µm |
Silver gray |
- Rare treatment and is done where the magnet is in eg lubrication/oily systems (eg motor/pump), where oil dissolves other surface treatments. The oil then protects the magnet against corrosion.
- The magnet must be kept in vacuum throughout the process from fabrication to assembly to be insulated against oxygen.
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