70/30 brass is soft at room temperature; they can be easily molded. It contains 30% zinc and 70% copper. It can be rolled, soldered, bent and drawn without temperature increase. It is widely used for decorative applications in antiques and oxidized finishes.

It is used to coat objects with a layer of tin. It is also used in the production of glass, ceramics and pigments. It is also used in the manufacture of surface finishes, protective coating of copper, iron and other metals.

They remove foreign reactive ions from the metal surface that inhibit the formation of protective oxide films. The removal of these ions renders the surface inert and promotes the development of an oxide film when the surface is exposed to the atmosphere.

It provides protection against corrosion and wear resistance, it represents the deposition of the nickel layer by the action of the electric current on the parts to be coated that are in contact with the electrolytic solution.

It is used to manufacture catalysts. In the electroplating process, an electric current is used to coat a conductive material to provide: hardness, increased corrosion resistance, wear resistance, increased ductility.

It is used in electrolytic baths, as electroplating, in synthesis, organic, metallic colorant, mordant for dyes, in the manufacture of nickel salts and Ni-Cd batteries.