1. Brass itself will be oxidized in the air, so we can provide heating conditions to accelerate oxidation. By heating, the copper in the alloy reacts with oxygen to form black black copper oxide.
2. The blackening treatment of the brass surface usually produces a black surface film on the surface by chemical methods. The blackening process of brass is attributed to its high production efficiency and good corrosion resistance of the oxide film layer. It has been widely used.
The main purpose of the blackened surface of mechanical brass machining parts is English matting, decoration and anti-corrosion. In recent years, some companies have adopted the black nickel plating process, but the black nickel plating is an anode coating, and the problem of easy discoloration is a headache.
Brass is an alloy composed of copper and zinc. Brass made of copper and zinc is called ordinary brass. If it is a variety of alloys composed of more than two elements, it is called special brass. Brass has strong wear resistance, and brass is usually used to make valves, water pipes, and connecting pipes for internal and external air conditioners and radiators.