Plating and electropolishing

Sandvik offers electroplating and electropolishing services for surface finish modification.

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The common electroplated alloys are hard and soft gold, nickel and silver. The typical deposit thickness range is 0.13 to 1.3 microns (5 to 50 micro-in.).

  • Soft gold deposits are typically required for applications like ultrasonic wire bonding and static contact materials.
  • Hard gold deposits are more common in dynamic contact applications.
  • Nickel plating can be used as a diffusion barrier between the underlying base metal and gold plating layer when the modified surface is exposed to elevated temperatures.
  • Nickel as an outer surface layer is an effective surface lubricant as well as a corrosion enhancement layer.
  • Silver can be used to enhance the electrical properties of the wire and well as providing a more active surface for joining or other processes.