Electroplating is a process that uses the principle of electrolysis to plate a thin layer of other metals or alloys on certain metal surfaces. It is a process that uses electrolysis to attach a metal film to the surface of metal or other material parts to prevent metal oxidation (

Such as rust), improve wear resistance, conductivity, reflectivity, corrosion resistance (copper sulfate, etc.) and enhance appearance.

The outer layer of many coins is also electroplated.

During electroplating, the coating metal or other insoluble material is used as the anode, and the workpiece to be plated is used as the cathode. The cations of the coating metal are reduced on the surface of the workpiece to be plated to form a coating.

In order to eliminate the interference of other cations and make the coating uniform and strong, a solution containing coating metal cations must be used as the electroplating solution to keep the concentration of coating metal cations unchanged.

Extended information: Notes on mold electroplating processing: Due to the development of new technologies and aluminum templates, especially for the design of injection molds, aluminum molds are becoming more and more commonly used for blow molds, R.I.M. molds, rubber molds, and structural development.

Foam mold and R.T.M. mold and other fields.

Although it may not be suitable for all application areas, in fact, its use is becoming more and more common.

Everyone hopes to extend the production life of the mold, such as using traditional tool steel to make the mold, using hard chromium or nickel metal plating on the surface, or using more specialized engineering coatings, which can prevent its surface from wearing or

Corrosion promotes better demoulding.

Later, in pursuit of the same goal, aluminum molds were used and a practical solution was found.

In order to be able to produce decorative parts through injection molding, in addition to extending the service life of the mold, manufacturers also hope that the surface of the aluminum mold can maintain a certain degree of gloss. Therefore, it is recommended to use a non-electroplating nickel spraying process because

This method helps extend the life of the mold surface finish, making it relatively easy to produce decorative parts.

Due to the soft texture of aluminum, if no surface coating is used, it will be easily worn by the plastic, accelerating its damage and thus changing the gloss of the injection molded parts.

Electroless nickel coating adds 50RC to the mold surface, making it sufficient to protect and prolong the gloss and structure of the mold surface.

Electroless nickel coatings can achieve a better surface finish quality than the aluminum itself, but it must be noted that some surface preparation first needs to be done before the mold can be plated.

For example, in order to enable it to reach a lens-grade quality level, it is recommended to first machine the surface of the aluminum mold to a SPIA-3 grade finish level, and then apply a high-phosphorus electroless nickel coating of 0.0003~0.0005 before further polishing it.

, bringing it to a diamond-quality finish level.