Copper is a non-ferrous metal closely associated with humans. It is not only rich in natural resources, but also has excellent properties such as electrical conductivity, thermal conductivity, ductility, corrosion resistance and wear resistance. It is widely used in electric power, electronics, energy and petrochemical, machinery and metallurgy, transportation, light industry, developing industries and other fields, the consumption of non-ferrous metal materials in my country is second only to aluminum.
The surface of copper parts is easily oxidized, discolored, blackened and even patina, what are the reasons for this and how to protect it?
The first reason for the phenomenon described above is that copper reacts with atmospheric oxygen to form black copper, and in severe cases, green salt. How to prevent oxidation and discoloration of copper can passivate copper.
The copper passivator is composed of polymer film former, surfactant, corrosion inhibitor, water, etc. The performance is not degraded, after drying, there is no residue, white powder, the film layer is uniform, does not affect welding, contact resistance and electrical conductivity .Suitable for pure copper, red copper, brass, cupronickel, manganin and other alloys.
The workpiece after polishing is soaked in a dilute passivating solution after washing with water.
Temperature: room temperature
Time: 3-5 minutes
After processing, the workpiece is dried naturally or dried, while the drying temperature does not exceed 80 ° C