Electroplating of copper is used for casting, nickel plating, chrome plating, silver plating and gold plating.
Author: Marisa
Electroplating of copper is used for casting, nickel plating, chrome plating, silver plating and gold plating.
Repair worn parts. Prevent local carburization. Improve conductivity. There are two methods: alkaline copper plating and acid copper plating. Usually. In order to obtain a thin, fine and smooth copper coating.
The steel parts with degreased surface rust are used as the negative. The pure copper plate is used as the positive. Suspended in an alkaline electroplating solution containing cuprous cyanide and sodium carbonate for alkaline copper plating.
In order to obtain a thick copper coating. Alkaline copper plating is required first. Then acid copper plating is carried out in an electrolyte containing copper sulfate, nickel sulfate and sulfuric acid. In addition. There is pyrophosphate.
Cyanide-free electrolyte prepared from tartrate. Pyrophosphate electrolyte has been widely used.
Copper plating of iron parts; generally refers to copper plating on the surface of iron. The main function of copper plating is that the coating has few defects. There is no shielding effect on iron parts. The coating has good uniformity. The corner effect is low. The shape of the workpiece changes little.
Magnets are currently permanent magnets with strong magnetic force. Various shapes can be processed according to specific requirements; despite these advantages. But the surface is prone to rust. Therefore, some protective surface treatment is usually required: copper plating, nickel plating, zinc plating, gold plating, epoxy resin electroplating, etc.
Copper plating of iron parts; generally nickel-copper-nickel plating is used. After three layers of plating, the anti-corrosion ability is sufficient. It is impossible to plate two layers or directly copper-nickel. Because direct copper plating of NdFeB was still a big problem at the time. The bonding strength is difficult to guarantee. Because the iron body will replace the copper in the copper plating solution. The copper plating layer does not have enough bonding strength. But the bonding strength of iron after nickel plating is good. So there is no need to worry about the bonding strength of nickel plating and copper plating. So a layer of nickel plating is still needed to ensure the bonding strength of the iron substrate.