First, let's understand what electroplating is. Electroplating is a process in which a layer of other metals or alloys are plated on the surface of certain metals by using the principle of electrolysis. It uses electrolysis to attach a metal film to the surface of metal or other material parts to prevent metal oxidation (such as corrosion) and improve wear resistance, conductivity, light reflection, and corrosion resistance (copper sulfate, etc.). ), enhance the beauty.
Common surface coatings of spring thimble are: gold plating, nickel plating, silver plating, chrome plating, zinc plating, copper plating, etc. ; Different electroplating materials can meet different application requirements. For example, for high current requirements, the surface is generally plated with gold. As we all know, gold has the best conductivity at room temperature, followed by silver plating; at the same time, some products are in direct contact with the skin (such as smart bracelets, Bluetooth headsets), and special requirements such as corrosion of sweat and insensitivity to the skin are required. The product cost of the connector will also be higher.
There are also some products that choose conventional electroplating materials such as nickel plating, silver plating, chrome plating, and zinc plating. These products are generally bulky, the current requirements are not very high, and the cost is relatively low, and these materials are generally selected.
Finally, let's talk about copper plating. The processing material of spring thimble is generally brass, which is mainly of good conductivity and moderate processing hardness. And some special products use stainless steel as the main processing material, and copper plating is relatively rare, so I won't elaborate on it here.