Type

Coating

Thickness

Color

SST

PCT

Typical Application Environment

Nickel

Ni+Ni
Ni+Cu+Ni

10-20um

Bright Silver

>24-72

>24-72

Safely exposed to environment possibly with dew, and remaining stability for a long lifetime both in appearance and performance.

Black Nickel

Ni+Cu+Ni

10-20um

Bright Black

>48-96

>48

Safely exposed to environment possibly with dew, and remaining stability for a long lifetime both in appearance and performance.

Cr3+Zinc

ZN blue white zinc
C-Zn color zinc

5-8um

Bright Blue
Shining Color

>16-48
>36-72

Zn Plate provides limited protection for high humidity, slight corrosion, or temporary surface pollution& stain.

C-Zn Provides good corrosion protection against atmospheric influences, humidity as well as chemicals.

Sn

Ni+Cu+Ni +Sn

10-25um

Silver

>36-72

>48

Suitable for soldering or electric contact surface.

Au

Ni+Cu+Ni +Au

10-15um

Gold

>12

>48

Suitable for decoration or special requirements.

Ag

Ni+Cu+Ni+Ag

10-15um

Silver

>12

>48

Suitable for decoration or special requirements.

Epoxy

Epoxy
Ni+Cu+Epoxy
Zn+Epoxy

10-20um
15-30um
15-25um

Black,Grey

>48
>72-108
>72-108

Safely exposed to environment possibly with dew, and remaining stability for a long lifetime both in appearance and performance.

Passivation

——

1-3um

Dark Grey

Temporary protection

Protecting un-coated magnet temporarily,e.g. during transport or short term storage.

Phosphated

——

1-3um

Dark Grey

Temporary protection

Protecting un-coated magnet temporarily,e.g. during transport or short term storage.