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Discs / Rods
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+39 0566 53094
+39 327 5923083
+39 0566 53094
About the surface treatment of our neodymium magnets
For our neodymium magnets, we offer not only nickel plating but various kinds to suit your needs. In particular, our unique anti-rust coating technology "Hi-DEN Coat" substantially improves the anti-rust performance of neodymium magnets. Please consider our Hi-DEN Coat along with plated products.
Comparison of properties
| Material | Mark | Film thickness(μm) | orrosion resistance Salt water spray(Hr) |
Porosity | Demagnetization rate | Abstract colors | PCT (Hr) |
|---|---|---|---|---|---|---|---|
| "HDC coating epoxy MF304" |
MF304 Epoxy |
5-100 | >500 | - | - | Multi-colors | >100 |
| "HDC coating polyimide MF305" |
MF305 Polyimide |
5-50 | >400 | - | - | Multi-colors | >100 |
| Zinc | Zn | 10-15 | >24 | <0.1 | <0.2% | White | >16 |
| Coloured zinc | Colour-Zn | 10-15 | 72 | <0.1 | <0.1% | Multi-colors | >24 |
| Nickel | Ni | 10-20 | 4 | <0.5 | <0.3% | Silver | >16 |
| Double nickel | Double-Ni | 15-20 | 24 | <0.2 | <0.3% | Silver | >16 |
| Nickel-copper-nickel | Ni-Cu-Ni | 15-30 | >48 | <0.1 | <0.1% | Silver | >42 |
| Zinc-nickel-alloy | Zn-Ni Alloy | 10-20 | >720 | <0.1 | <0.1% | Multi-colors | >72 |
| Other company's Epoxy | EPOXY | 10-50 | >300 | - | - | Black | >24 |
| Electroless Nickel | Electroless Ni | <1 | >72 | - | - | Silver | >24 |
Salt spray test：37-39℃ 5%NaCl PH6.5-7.0 1.5ml/Hr
PCT: 120℃, 2atm, 100%RH, 12Hr.
Appearance and characteristics
φ10mm×10mm |
Element symbol |
Name of element |
Properties |
Usage |
|---|---|---|---|---|
 |
3CrZn | Trivalent chromium zinc | Chromate treatment. Recently hexavalent chromium has been regulated as an environmentally destructive substance and replaced with trivalent chromium | Eletronic parts industrial tool parts |
 |
Ag | Sliver | Silver has the best electric conductivity out of all the metals, low contact resistance and good solderability but is easy to discolor. | Eletronic parts Connectors Eating utensils Accessories |
 |
Au | Gold | Gold has good corrosion and oxidation resistance along with low electrical resistance. | Eletronic parts Electrical contact parts Decorations Accessories |
 |
Cr | Chrome | Chrome has good abrasion and oxidation resistance and will not lose its shine in the atmosphere. | Exterior parts Medical supplies Audio-visual equipment Accessories |
 |
Cu | Copper | Copper is easy to discolor so is used as a base. It is used to fill in dents and bring out a shine. | Casting products ABS resin base |
 |
CuZn | Brass | Brass materials change color easily and are usually used as foundation. Brass materials are often used in ancient ornaments. | Ancient color ornaments |
 |
Ni | Nickel | Nickel is chemically stable and has good anti-rust properties. It can be used for a wide range of purposes and is used as a base for gold plating, chrome plating etc. It can cause skin irritation. |
Eletronic parts Connectors Base platings Accessories |
 |
NiBlack | Black nickel | Black nickel is an alloy plating made of nickel, zinc and sulphur. The color may vary depending on the type of plating used as a base. | Decorations Accessories |
 |
Sn | Tin | Tin has excellent anti-corrosion properties and does not oxidize easily. It does not lose its shine easily and is safe to use in foods. | Eating utensils Cans Tin objects Decorations Accessories |
 |
Rh | Rhodium | Rhodium has excellent anti-corrosion properties and does not oxidize easily. It does not lose its shine easily and is safe to use in foods. | Eletronic parts Electrical contact parts Audio parts Decorations Accessories |
 |
- | Un-treated | No surface treatment coating. Rust will develop easily on neodymium magnets. | |
 |
- | Nylon | Made with no organic solvent and used in food processors and medical devices. Passed the Food Sanitation Act. | Toys Small articles |
 |
- | Polyimide MF305 | High impact strength, resists bends, and can be used in high temperature. | Eletronic parts Small articles For bending after painting |
| - | - | Epoxy MF304 | High solidity of resin / Flame retardance regulation: UL94 / V-0 Certified | Eletronic parts Small articles |
| - | - | Epoxy MF303 | High solidity of resin / Easy to polish | Decorations |
Anti-rust performance test Ni/Zu/Epoxy
| Magfine | Company[S] | Other companies |
Magfine | Company[T] | Magfine | |
|---|---|---|---|---|---|---|
| Duration | HDCcoating epoxy MF304 |
Normal epoxy |
Anti-rust undercoat Zn for automobiles Zn |
HDC coating polyimide MF305 |
Normal epoxy |
NiCuNi |
| Before start of test |  |
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| After 72 hrs |  |
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| After 312 hrs |  |
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| After 504 hrs |  |
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Salt spray test：37-39℃ 5%NaCl PH6.5-7.0 1.5ml/Hr
PCT: 120℃, 2atm, 100%RH, 12Hr.
For details of Hi-DEN Coat click here