Available coating of Sintered NdFeB Magnets
| Available Coatings | Salt Spray Test Standard(Hours) | ||||
| Surface | Coating | Thickness(Microns) | Color | Resistance | —— |
| Passivation | 1 | Silver Grey | Temporary Protection | ||
| Nickel | Ni+Ni | 10-20 | Bright Silver | Excellent Against Humidity | 24-48 |
| Ni+Cu+Ni | |||||
| Black Nickel | NiCuNi | 10-20 | Bright Black | Excellent against humidity and salt spray | 48-72 |
| Zinc | Zn | 8-20 | Bright Blue | Good Against Salt Spray | 24-48 |
| C-Zn | 24-72 | ||||
| Tin | Ni+Cu+Sn | 15-20 | Shinny Color | Excellent Against Humidity | 48-72 |
| Gold | Ni+Cu+Au | 10-20 | Gold | Superior Against Humidity | —— |
| Ag | Ni+Cu+Ag | 6-10 | Silver | Superior Against Humidity | —— |
| Copper | Ni+Cu | 10-20 | Gold | Temporary Protection | —— |
| Epoxy | Epoxy | 15-25 | Black,Red,Grey | Excellent Against Humidity & Salt Spray | 24-48 |
| Ni+Cu+Epoxy | 48-72 | ||||
| Zn+Epoxy | 48-72 | ||||
| Chemical | Ni | 10-20 | Silver Grey | Excellent Against Humidity | —— |
| Parylene | Parylene | 5-20 | Grey | Excellent Against Humidity,Salt Spray,Superior Against Solvents,Gases,Fungi and Bacteria,FDA Approved | —— |