MIL-STD-1250A
The anodic or chemical film, or the metallic coating, shall be applied after all punching, drilling, machining, forming and fabrication have been completed.
5.5.2 Copper. Copper and copper alloys may be given a black oxide treatment in accordance with MIL-F-495 or may be plated or painted as required. Where bare copper is required by the design, a tarnish-preventive thin silicone cured resin film may be used. Do not use silicone oils or greases.
TABLE II. Surface finish for electrical bonding.
Metal |
Surface Finish |
Aluminum 1100, 3003, and clad alloys............. Aluminum, all other alloys........................... Copper, copper alloys............................ Cadmium...................... Iron and steel................ Nickel and corrosion resistant steel................. Silver............................. Solder............................ Tin................................. |
Bare, or low electrical resistance chromate type film treatment, MIL-C-5541, class 1A Tin-lead (solder) plate or tin plate, MIL-T-10727, preferred Cadmium plate, QQ-P-416 Nickel-cadmium plate Low electrical resistance chromate type chemical film treatment, MIL-C-5541, class 1A Bare Tin plate, MIL-T-10727, or tin-lead (solder) plate, preferred Cadmium plate, QQ-P-416 Gold plate, MIL-G-45204 Bare or chromate treated Tin coat, MIL-T-10727 or tin-lead (solder) plate, preferred Cadmium plate, QQ-P-416 Bare; difficult to bond because of adherent oxide film Bare Bare Bare |
5.5.3 Magnesium. Because of magnesium's poor resistance to corrosion, magnesium and magnesium alloys shall not be used.
18
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business