|
Applied On
|
Purpose |
| Anodize |
Aluminum
|
Durable decorative coating. Nonconductive. Available in many
colors. Thickness build up: .00005" - .0010" |
| Black Oxide |
Steel
(ferrous metals)
|
Thin decorative coating. Very little corrosion protection.
Good
on moving parts. Should be oiled.
|
| Chromate |
Aluminum
(non ferrous)
|
AKA Chem Film, Iridite, Alodine, etc. Corrosion control or
paint primer. Conductive. Easily scratched. Normally yellow.
Specify CLEAR if
needed.
|
| Chrome |
Copper over Steel
|
Hard, durable, decorative finish. Low coefficient of friction.
Pretty, but pricey. |
| Copper |
Ferrous or nonferrous
|
Used for undercoating, to eliminate buffing, to lubricate,
to
prevent case hardening, to enable tinning, etc.
|
| Gold |
nonferrous
|
Conductive decorative corrosion resistance. Really
pricey. |
| Electroless Nickel |
nonferrous or
Copper over steel
|
Decorative, durable, moderate corrosion protection.
Electroless
can cover into tight corners.
|
| Nickel |
nonferrous or
Copper over steel
|
Hard, durable, corrosion protection. |
| Passivate |
Stainless Steel
|
Removes iron from surface to reduce rusting. |
| Silver |
nonferrous or over copper flash
|
Decorative, conductive, corrosion resistance,
lubricity. |
| Tin |
nonferrous or over copper flash
|
Improves solderability & conductivity. |
| Zinc |
Steel
|
Corrosion control or paint primer. Electro-deposited, does not
cover well on inside corners and closed hems.
TYPE I (NO CHROMATE). TYPE II
(YELLOW CHROMATE). TYPE III (CLEAR CHROMATE).
|
