White bronze is actually an alloy of copper, tin, and zinc, commonly referred to as tri-metal. Tri-metal alloys are white, similar to bright nickel, silver or rhodium and are extremely resistant to tarnishing and corrosion. Although tri-metal deposits are not as corrosion resistant as nickel or nickel phosphorus alloys, they do offer significantly improved protection over silver, copper and zinc.

Coupling tri-metal’s corrosion and wear resistance with the metal’s solderability and non-porous properties, the result is a highly-versatile deposit. This makes tri-metal an ideal replacement for nickel and silver in decorative and technical applications including high-frequency RF connectors. The bright white finish of tri-metal plating can also be used as an undercoat and diffusion barrier for palladium, palladium/nickel, silver and often gold. The deposit has low porosity and a low coefficient of friction. Lead-free tri-metal is ideal for component leads and all soldering and welding applications.