What is electroplating? Simply speaking, electroplating is the process of depositing metal or alloy on the surface of a workpiece by electrolysis under the action of direct current to form a uniform, compact and well-bonded metal surface. Purpose of PIN Needle Electroplating for Connectors 1, beautiful After electroplating, metals usually have a brighter appearance than materials. 2. Anti-corrosion Usually raw materials such as copper and iron are easily oxidized in the air. The corrosion resistance can be improved by electroplating a layer of metal with strong oxidation resistance. 3. Strong electroplating adhesion (e.g. copper) For metals with poor adhesion, copper substrates are usually used to enhance adhesion before plating. 4. Enhance conductivity (e.g. gold, silver) The electrical conductivity of raw materials such as iron, phosphorus and copper is usually below 20%. Connectors with low impedance requirements can not meet the requirements. Therefore, the electrical impedance of high conductivity metals such as gold plating on the surface can be reduced. 5. Improve solderability (e.g. tin, gold, etc.) Because of the poor adhesion of raw materials to tin, the solderability of parts can be improved by plating tin and other substances with a certain thickness on the surface. Generally speaking, PIN needle plating of connectors is to improve the hardness and wear resistance of connectors to meet their specific functions and life.