Discussion on the differences between metal electroplating process and plastic electroplating
As the name implies, plastic electroplating begins with the analysis of the nature of plastic materials. For example, in the subject part of plastic electroplating processing, plastic itself can not conduct electricity, so the conductive treatment part of the electroplating process needs to be carried out first, that is, the activation and chemical plating of electroplating materials are required, After finishing this electroplating process, the later electroplating process is similar to the electroplating process of hardware metal material products. However, with the different product quality requirements of electroplating processing, there are different electroplating process details that need to be paid attention to. The problems in the process of using after electroplating are different
Compared with the electroplating process of various metals and other metals, there is still a potential difference between the basic body of the material product and the coating. If the potential of the electroplating layer of the hardware product is positive, it will be the cathodic plating layer, which can only play a common protective role. If there are pores on the surface of the plating layer or the surface is damaged during the electroplating process, the potential difference between the basic body and the coating layer is still existed, If it is in the presence of electrolyte, the basic body of the product material is first corroded by chemical substances, such as the steel we often use to process copper plating; if the potential on the surface of the coating is negative, we call it anode electrodeposition, which not only has the ordinary protection function of organic machinery, but also has the basic electrochemical protection function, The electroplating layer is usually corroded first. If steel is used for galvanizing, Yongchang electroplating plant will first remove the zinc coating of the waste galvanized products, and the surface of the material workpiece is still intact, which is rarely corroded by weather factors or other reasons. This is the principle or reason
Electroplating of metal products can be described by the following process flow: mounting → degreasing and washing → derusting and washing → activation and washing → electroplating → washing → drying → inspection → packaging. Among them, electroplating, common are: zinc plating, copper plating, nickel plating, gold plating, silver plating, tin plating, rhodium plating, palladium plating and alloy electroplating. It can be single-layer plating or multi-layer plating. Electroplating types: single metal plating (such as the above), alloy plating, composite plating, chemical plating. Vacuum coating and ion sputtering are also called electroplating by many people. Such as aluminum oxidation, blackening / bluing chemical polishing, electrochemical polishing, passivation, etc., are also classified as electroplating.
Release time : 2020-04-08
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