Surface Treatment Technology of Aluminum Bus Bar
➤Tin plating: Tin plated aluminum bus bar can provide good solderability, excellent corrosion resistance and low contact resistance. Tin is soft and has a low melting point. It is a common and cost-effective coating for the contact surface of aluminum bus bars.
➤ Silver plating: Galvanic Silver plated aluminum bus bar has the best electrical and thermal conductivity among all metals, and its contact resistance is extremely low and stable. It has good corrosion resistance and high cost. It is used in key connection parts that require extremely high contact resistance, large current, or long-term high reliability.
➤ Copper plating: It significantly improves connection performance (reduces contact resistance, solves aluminum oxidation problems, improves connection reliability) and a certain degree of corrosion resistance. These advantages make it very valuable in situations where high-reliability connections or direct connections to copper devices are required.
➤ Nickel plating: high hardness, good wear resistance and corrosion resistance. Its conductivity is not as good as copper, silver and tin, usually used as an intermediate barrier layer (to prevent galvanic corrosion caused by direct contact between aluminum and other metals such as copper), or as a functional plating layer (if wear resistance is required). It is rarely used alone for busbar connection surfaces that require low contact resistance.
