AMS 2417, ASTM B841
Zinc-nickel plating has been used typically to provide corrosion resistance to steel parts that may operate at elevated temperatures. Zinc-Nickel electroplating is an alkaline coating that is used in the protection of steel, cast iron, malleable iron, copper and brass. Zinc-Nickel is recognized as an environmentally safe alternative to cadmium electroplating. In specific applications, Zinc-Nickel demonstrates equivalent, or better, corrosion properties when compared to cadmium. Zinc-Nickel plating is an efficient, economical coating, with minimal environmental impact.
TYPES
Type I As-plated without supplementary treatment, service temperature 500 °F (260 °C) max.
Type 2 As-plated with supplementary chromate treatment
Type 3 As-plated with supplementary phosphate treatment (Adhesion base for primer/paint), service temperature 350 °F (177 °C) max.
GRADES
Grade A Hexavalent chromate treatment, service temperature 250 °F (121 °C) max.
Grade B Trivalent chromium treatment, service temperature 375 °F (191 °C) max.
ZINC-NICKEL PLATING-PROCESS CONTROL & TEST METHOD
VISUAL INSPECTION – ASTM B841, AMS 2417
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