Description
Sequential plating substantially replaced cyanide plating by the early 1980s, requiring a diffusion process to form brass. Sequential plating complexity is roughly triple that of cyanide, while diffusion adds an order of magnitude to complexity. Cyanide plating quality depends on electrolyte composition and brass weight on electrical uniformity. These variables are complicated for sequential plating by diffusion, which is paramount to obtain quality brass. This paper reviews three diffusion processes: Joule Effect, Induction, and Fluidized Bed Diffusion.