Surface |
Coating |
Thickness (um) |
Color |
SST (hours) |
PCT (hours) |
|||||
Nickel | Ni+Ni | 10-20um |
Bright Silver |
>24-72 | >24-72 | |||||
Ni+Cu+Ni | ||||||||||
Black Nickel | Ni+Cu+Ni | 10-20um | Bright Black | >48-96 | >48 | |||||
Cr3+Zinc | Zn | 5-8um | Bright Blue | >16-48 | ||||||
C-Zn | Shining Color | >36-72 | ||||||||
Sn | Ni+Cu+Ni+Sn | 10-25um | Silver | >36-72 | >48 | |||||
Au | Ni+Cu+Ni+Au | 10-15um | Gold | >12 | >48 | |||||
Ag | Ni+Cu+Ni+Ag | 10-15um | Silver | >12 | >48 | |||||
Epoxy | Epoxy | 10-20um | Black, Grey | >48 | ||||||
Ni+Cu+Epoxy | 15-30um | >72-108 | ||||||||
Zn+Epoxy | 15-25um | >72-108 | ||||||||
Passivation | --- | 1-3um | Dark Grey |
Temporary Protection |
||||||
Phosphated | --- | 1-3um | Dark Grey |
Temporary Protection |
Note:
1. Different
plating,different SST Result.Salt Spray Test Results, which is plated
by grinding(small size magnets), is better than the one, which is coated
by hanging up(big size magnets).
2. Salt Spray
Test(SST) test condition: 5% NaCl, 35℃, continuously spray a certain
time, check if there is corrosion on coating surface.
3. Pressure
Cooking Test(PCT) test condition: 2 atm, 95% RH(relative humidity),
121℃, to test the coating adhesion. Notes:The products coating Zinc,
passivated/phosphated, or coating Epoxy are not suitable for PCT.
4. Other
methods to test the coating quality: drop test, cross cut test, heating
and spilling test, constant temperature and humidity test,etc.