Isotropic Bonded NdFeB Magnets Coatings
Compression molded magnets kept in dry air will be rust free for a long time. However, in a humid environment, the moisrure in the air will cause rust on the surface.
Therefore surface coating is necessary for most applications. MPCO provides 5 types of coatings for your specific shape and use environment.
Due to higher polymer binder content, injection molded magnets have higher corrosion resistance and in most cases can be used without coatings
Isotropic Bonded NdFeB Magnets Coatings
| Coating method | Coating thickness (µm) | Corrosion resistance Time to rust formation in humidity test (hours) | Application shape | ||
|---|---|---|---|---|---|
| 60℃×95%R.H. | 80℃×95%R.H. | ||||
| Resin coating | Electrodeposition coating (epoxy) | 20 ～ 35 | 500 | 300 | Various shapes |
| Spray coating (epoxy) | 15 ～ 30 | 400 | 200 | Various shapes | |
| Dip coating (epoxy) | 1 ～ 5 | 100 | 50 | Small parts | |
| Barrel spray coating (epoxy) | 3 ～ 18 | 200 | 100 | Small parts | |
| Metal plating | Ni plating | 10 ～ 30 | 500 | 300 | Various shapes |
New electrodeposition (N-ED)
In most applications, conventional electrodeposition coating gives the adequate protection. However, for more demanding applications where higher corrosion resistance is required, our new electrodeposition coating (N-ED) may be the answer. Please let us propose the appropriate coating method for your application.
Features of N-ED
| Name | Electrodeposition | New electrodeposition (N-ED) |
|---|---|---|
| Base material | Epoxy resin | Denatured speciality epoxy resin |
| RoHS compliance | Compliant | Compliant |
| Anti-corrosion, anti-chemicals | B | A |
| Oil resistance | B | A |
| Maximum usage temperature (Only for coating) | ≦210℃ | ≦270℃ |
| Coating thickness | 25μm | 15μm |
| Pencil hardness | ≧2H | ≧4H |
