Why do we need to perform surface treatment on metal products before electroplating?

Various metal products are often contaminated with oil during processing, such as lubricating oil, marking paint, etc., as well as corrosion and oxide scale generated during storage, oxide film or burrs during processing, etc. . If these surface contaminants are not treated and then electroplated, a plating layer with good adhesion and a bright and smooth surface will not be obtained. Some polished surfaces seem to be very clean. In fact, there are grease films such as polishing paste on the surface. If it is not removed, the adhesion of the coating will not be guaranteed, and the coating will bubble. Therefore, metal products must be pre-plated before electroplating.