Brass
As Brass refers to the coating of metals with brass .
Procedure
A coating of brass can be obtained by dipping red-hot iron in molten brass in the absence of air. A coating of brass can be galvanically obtained in a cyanide bath with copper sulfate and zinc sulfate , from which both metals are cathodically deposited together as an alloy. The addition of small amounts of gold (III) chloride results in a more golden color.
On copper you get brass if you pick it up bright, put it in a zinc amalgam, add tartar and dilute hydrochloric acid and boil it. The copper, which has become sufficiently white, is washed, heated to drive off the mercury and polished (false gold plating ).
In a similar way, a bronze coating (galvanic bronzing ) can be produced with a solution containing copper and tin , and a nickel silver coating can be produced with a solution containing copper, zinc and nickel.
History and Development
The brass was carried out in England in 1841 by Henri de Ruolz and in 1845 by Charles Vincent Walker .
