PLATING and FINISHES

PLATING and FINISHES

Finish

Color

Corrosion Resistance

Material

Characteristics

Black Nickel

Black

Very Good

All Metals

Generally used as a matching finish.

Cadmium

Silvery Gray

Very Good

All Metals

Not suggested unless absolutely necessary due to toxic chemical concerns

Chromate

Yellow, Olive Drab, Black, Blue White

Good

All Metals

A dipping process following the zinc/cad process increasing rust resistance.

Chromium

Bright Blue White

Very Good

All Metals

Bright lustrous finish used when ultimate beauty and appearance are desired.

Colored Dyes

Most any Color

Good

All Metals

A dipping process following zinc/cad process for matching or color coding

Copper

Copper

Fair

All Metals

Common undercoat for nickel or for decorative purposes

Dichromate Dip

Rainbow Cast

Good

All Metals

A dipping process following zinc/cad improving resistance to rust

Nickel

Silver

Very Good

All Metals

Hard, stable, often decorative finish

Oxide (Black)

Lustre Black

Fair

Ferrous and

Non-ferrous

Chemical immersion that does not add to thickness.  Good wearing qualities.

Passivating

 

Very Good

Stainless Steels

A nitric acid dip  to remove foreign materials, brighten, and improve rust resistance

Phos & Oil

Black

Very Good

All Metals

Commonly used on clip and clamp spring steel products and other automotive fasteners.

Zinc (Electro)

Blue White

Good

All Metals

Most popular finish combining good rust resistance, appearance, and economy