In the copper plating process using acid copper brightener, because the composition of the plating solution is relatively simple and the plating solution is stable, no harmful gas is generated during the production process, and full-bright copper plating with good leveling performance can be obtained.What are the components of the acid copper plating solution?
When we use medium phosphorus electroless nickel plating solution to produce, after the workpiece is plated with electroless nickel coating, it will go through the process of cleaning and drying.Does the workpiece need to be passivated after electroless nickel plating?
When we use nickel plating additives to produce, there are several reasons for the poor adhesion of the nickel plating layer of the workpiece, and the reasons are different.So how to judge the reasons for the poor adhesion in different parts of the coating?
When we use high-sulfur nickel additives, we need to ensure that the sulfur content in the coating is about 0.2%, and the potential difference between the coatings should be more than 120mv.In addition, the brightness of the coating, the dispersion ability and deep plating ability of the plating solution should also meet the needs of production.So what factors will affect the appearance and potential difference of the coating in the production process?
The use of nickel sealing additives can effectively improve the corrosion resistance of nickel coating.This is because the solid particles on the surface of the composite nickel plating layer are non-conductive when the chromium layer is deposited, so the chromium layer cannot be deposited on these particles, and a large number of micropores will be formed on the chromium layer.These micropores can remove the huge internal stress in the coating, thereby reducing the stress corrosion of the coating.So, what points should be paid attention to when using nickel sealing additives?
In the production process of using nickel plating brightener, due to the certain deformation of the metal nickel crystal or the inclusion of different phases, a certain internal stress will be generated in the coating.When the internal stress of the nickel layer is large, the hardness of the coating will be relatively large, but it is easy to peel, crack or have poor ductility.So, what factors are related to the internal stress of the nickel layer?