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TRI-METAL / WHITE BRONZE PLATING

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-metalís corrosion and wear resistance with the metalís 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.
WHY CHOOSE TRI-METAL OVER NICKEL PLATING?

  • Composed of 55% copper, 30% tin, and 15% zinc
  • It is nickel-free and lead-free
  • It is resistant to corrosion, tarnishing, oxidation, and chlorides
  • It can handle torque and stress
  • Conductivity is as good as of Silver
  • Non-magnetic finish
  • Low surface friction (approximately 70% of silver)
  • Ability to plate over existing metals (will not flake off easily)

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