Request a QuoteNdFeB coating selection should follow the real environment, dimensional tolerance and assembly process—not appearance alone.
Use the comparison table with the service environment and finished dimensions. Agree the coating and acceptance test for the actual assembly.
Actual performance depends on pretreatment, edge geometry, coating thickness and test method. Use samples and an agreed validation plan for critical environments.
| Coating | Typical reason to select | Design note |
|---|---|---|
| Ni-Cu-Ni | General protection and metallic appearance | Common baseline; protect chipped edges |
| Zinc | Economical sacrificial protection | Color and passivation system vary |
| Epoxy | Improved barrier and dark appearance | Control edge coverage and handling damage |
| Parylene | Thin conformal barrier for complex shapes | Specify grade, thickness and adhesion test |
| Phosphate | Thin temporary protection / bonding preparation | Not a stand-alone solution for severe exposure |
State whether magnet dimensions apply before or after coating. Small magnets, tight air gaps and bonded assemblies may require thickness control on specific faces and masking of bonding or electrical contact areas.
Describe the end-use environment and acceptance test instead of requesting a coating by name only.
Humidity, chemicals and temperature
Tolerance stack and joining conditions
Agree the relevant test method
This sequence is a review aid, not a measured result or product approval.
There is no universal best coating. Ni-Cu-Ni is a common baseline, while epoxy or parylene may suit specific barrier, thickness or assembly requirements.
No. Coating reduces exposure, but chips, porous edges, severe chemicals and poor assembly sealing can still cause corrosion. The complete environment must be reviewed.
Review the relevant product and manufacturing capability.
View capabilityCompare the adjacent material or application route.
Learn moreSelect NdFeB, SmCo, ferrite or AlNiCo magnet grades using operating temperature, demagnetization margin, geometry, corrosion and cost.
Read the guideDefine magnetic function, geometry, coating and assembly requirements.
Read the guideSend the drawing, application conditions and annual volume. Engineering will review the material, process and inspection route.