Copper Under Coat Finishing Specification Mil-C-14550

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Mil-C-14550, Copper, (Under Coat)

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 casehardening) Spec. Thickness
  • Class 00  .001 - .005
  • Class 1   .001 minimum thickness.
  • Class 2   .0005 minimum thickness.  Typically used as an undercoat for nickel and other platings.
  •  Class 3  .0002 minimum thickness. To prevent basis metal migration into tin (prevents poisoning solder-ability).
  • Class 40  .0001"To prevent basis metal migration into tin (prevents poisoning solderability).

MIL-C-14550, MILITARY SPECIFICATION: COPPER PLATING (ELECTRODEPOSITED) (02 DEC 1983) [S/S BY SAE-AMS2418]., This specification covers electrodeposited copper plating on metal surfaces

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