AMS–QQ-P-416
Cadmium plating offers an exceptional bonding surface for adhesives, such as those increasingly used in aircraft manufacturing, and is the preferred coating for salt-water environments. Additional advantages of cadmium plating include: low electrical resistance; outstanding conductivity; superior solderability; favorable galvanic coupling with aluminum; and excellent natural lubricity, which results in prevention of galling and a low coefficient of friction.
TYPES
Type I – As plated
Type II – With supplementary chromate treatment
Type III – With supplementary phosphate treatment
CLASSES
Class 1- 12.7 µm Minimum
Class 2- 7.62 µm Minimum
Class 3- 5.08 µm Minimum
CADMIUM PLATING-PROCESS CONTROL & TEST METHOD
VISUAL INSPECTION – AMS QQ-P-416
THICKNESS TEST – ASTM B 487, ASTM B 499, ASTM B 504, ASTM B 568, ASTM E 376
ADHESION TEST – ASTM B571
HYDROGEN EMBRITTLEMENT – ASTM F519
CORROSION RESISTANCE – ASTM B117