1. Corrosion Resistance: Raw materials like copper and iron are prone to oxidation in air. Electroplating a layer of metal with strong oxidation resistance can enhance the corrosion resistance of the terminals.
2. Enhanced Conductivity: Raw materials such as iron and phosphor bronze typically have conductivity below 20%, making them unsuitable for low-impedance n-type connectors. Therefore, plating a layer of high-conductivity metal such as gold can reduce their impedance.
3. Improved Plating Adhesion: For metals with poor adhesion, a copper base coat is usually applied before electroplating to improve adhesion.