You are here: Surface Treatment
In many applications, NdFeB magnets must be protected by surface treatment in order to improve the corrosion resistance. There are several types of surface treatments with different character and function for option. We will be pleased to offer our customers the best solutions on this.
|
Coating material |
Suggested environment temperature |
Coating thickness |
Coating colour |
Features |
|
Phosphated |
/ |
< 1 µm |
/ |
Temporary storage and short term transportation protection |
|
Ni |
<200℃ |
5 - 20 µm |
Light yellow |
Good resistance to corrosion, suitable for dew atmosphere and long time using |
|
Zn |
<150℃ |
5 - 8 µm |
Silver white |
General resistance to corrosion and salt spray |
|
Sn |
<150℃ |
5 - 10 µm |
Silver |
Excellent corrosion resistance, ductility and weldability |
|
Ag |
<200℃ |
5 - 10 µm |
Silver |
Enhanced corrosion resistance, increasing the conductivity |
|
Au |
<200℃ |
5 - 10 µm |
Golden |
Suitable for decorating application |
|
Cu |
<200℃ |
5 - 10 µm |
Yellow |
Good electrical conductivity, used for local anti-carburizing |
|
Ni-Cu-Ni |
<200℃ |
10 - 30 µm |
Silver |
Excellent resistance to corrosion |
|
Epoxy |
<130℃ |
10 - 25 µm |
Black/grey |
Good resistance to corrosion, high temperature, high humidity, especially salt spray |
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