A non-cyanide brass plating bath and a method of making metallic foil having a brass layer using the non-cyanide brass plating bath

摘要

The present invention provides a non-cyanide brass plating bath composition containing copper, zinc, metal polyphosphate, and orthophosphate, with the proviso that the composition does not contain cyanide. The present invention also provides a method of making metallic foil having a brass layer including the steps of providing a metallic foil; contacting the metallic foil with a non-cyanide brass plating bath containing copper, zinc, metal polyphosphate, and orthophosphate, with the proviso that the brass plating bath does not contain cyanide; applying a current to the brass plating bath; and recovering the metallic foil having a brass layer.