Copper Plating
General details and Specification of copper finishes
Copper in color and matte to a very shiny finish. Good corrosion resistance when used as undercoat. A number of copper processes are available, each designed for a specific purpose: Brightness: (to eliminate the need for buffing) High speed: (for electroforming) Fine grain: (to prevent case hardening)
Benefits of copper plating
- improves electrical properties
- Improves overall corrosion resistance
- Impairs migration of alloying elements
- Under plating to enhance adhesion of deposits of other metals
- Anti-galling on Stainless steel threaded oil industry parts
Specifications
| Specs | Thickness | Comments |
|---|---|---|
| M1L-C-14550B | Unless otherwise specified | |
| Class 0 | 0.001"-0.005" | For heat treatment stop-off |
| Class I | 0.001" | For carburizing and decarburizing shield, also plated through printed circuit boards. |
| Class 2 | 0.0005" | As an undercoat for nickel and other platings. |
| Class 3 | 0.0002" | To prevent basis metal migration into tin (prevents poisoning solderability). |
| Class 4 | 0.0001" | To prevent basis metal migration into tin (prevents poisoning solderability). |