Finish |
Color |
Anti-Corrosion Properties |
Used With |
Characteristics And Uses |
Black Oxide |
Black |
Good-Interior Only |
Most metals |
Decorative finish. Used on interior applications. |
Black Zinc |
Black |
Excellent |
All metals |
Rich and lustrous. With or without lacquering. |
Cadmium |
Bright Silver-gray Dull or burnished |
Very Good |
Most metals |
Non-porous metallic plating. Rich appearance, good rust resistance, low cost, good electrical conductivity. Bright silver-gray dull gray or black electroplated finish. |
Chromium (Chrome) |
Bright Blue-white |
Excellent |
All metals |
Used wherever a beautiful finish is desired. Bright blue-white lustrous appearance. Electroplated. |
Dichromate Dip |
Rainbow |
Excellent |
All metals |
A yellow, brown, green or iridescent colored catalog. This dipping process gently increases rust resistance. Add to Zinc or Cadmium plating. |
E-Coat |
Black |
Excellent-168 Hour Salt Spray |
All metals |
Added protection containing corrosion inhibitors. Excellent for exterior applications. |
Iridite |
Green, Blue, Olive Drab, Red, Bronze, Black |
Excellent |
All metals |
A colouring dip which also adds rust resistance. Usually applied on Zinc or Cadmium. |
JS-500 |
Chrome-like luster |
Excellent-500 Hour Salt Spray |
All metals |
Outstanding corrosion resistant finish that provides economical corrosion protection without adversely affecting dimensions. |
Nickel |
Silver |
Very good |
All metals |
A hard stable, dull white or bright burnished finish. Used for appliances and hardware. |
Parkerized |
Black |
Excellent |
Ferrous metals |
Added protection when oiled with a non-drying petroleum oil containing corrosion inhibitors. Good lubricity. |
Phosphating |
Dull, gray, black, or blue |
Excellent |
Ferrous metals |
A chemical process of rust-proofing steel. |
Passivating |
– |
Excellent |
Stainless steels |
For stainless steels. A nitric acid dip to remove foreign material and brighten finish. |
Zinc Electrogalvanized |
Gray |
Very good |
All metals |
A commonly used finish with good rust resistance, appearance and low cost. |