Manufacturing method of metal foil with brass layer using non-cyanide brass plating bath and 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 when the composition does not contain cyanide. In addition, the present invention provides a step of providing a metal foil, wherein the metal foil is contacted with a non-cyanide brass plating bath containing copper, zinc, metal polyphosphate and orthophosphate when the brass plating bath does not contain cyanide. It provides a method for producing a metal foil having a brass layer comprising the step, applying a current to the brass plating bath and recovering the metal foil having a brass layer.