An Introduction to Copper Plating
Author: Robby
Copper plating (copper plating) copper plating is an important protective decorative plating copper/nickel/chromium system components, flexible and low porosity copper plating, for the improvement of the combination between the plating and corrosion resistance plays an important role.
Copper plating is also used for localized anti-carbon penetration, metallization of printed board holes, and as a surface layer for printing rollers. After chemical treatment of colored copper layer, coated with organic film, can also be used for decoration. Currently the most used copper plating solution is cyanide plating solution, sulfate plating solution and pyrophosphate plating solution.
Copper plating (copper (electro) plating; electrocoppering) used for casting molds, nickel plating, chromium plating, silver plating and gold plating of the priming, repairing the wear part, to prevent local carburization and improve electrical conductivity. It is divided into alkaline copper plating and acid copper plating. Usually, in order to obtain a thin, detailed and smooth copper plating layer, the surface of the steel to remove oil and rust as the cathode, pure copper plate as the anode, hanging in the alkaline plating solution containing cuprous cyanide, sodium cyanide and sodium carbonate and other components, alkaline (cyanide) copper plating. In order to obtain a thicker copper plating layer, the plated parts must be alkaline plated first, and then placed in an electrolytic solution containing copper sulfate, nickel sulfate, and sulfuric acid, among other components, for acid copper plating. In addition, there are cyanide-free electrolytes formulated with pyrophosphates, tartrates, ethylenediamine, and so on. The pyrophosphate electrolyte has been widely used.