Zinc Nickel

Derby's specialist Electroplaters providing high quality finishing and powder coating services in The Midlands for over 45 years. Scroll down to see our services.

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Applications

Zinc-nickel plating is usually applied where specifiers want the highest performance with the lowest deposit thickness. By specifying zinc-nickel, components can resist more than 1000 hours neutral salt spray (BS EN 4826:2014, ISO 9227 & ASTM B117) with no effect on the dimensional tolerance of threaded components. Components typically plated with zinc-nickel include:

  • Automotive – Fluid transfer tubes which can be deformed into their required shape after plating
  • Automotive – Fasteners, particularly in areas of high corrosion (underhood, chassis joints)
  • Electronic – Connectors, as a direct replacement for cadmium to provide corrosion resistance and high electrical conductivity
  • Aerospace and defense – Joining components in contact with aluminum.

The preferred alloy composition for zinc-nickel plating is 12 – 15% nickel, with the remainder being zinc. This alloy gives exceptional sacrificial corrosion resistance and can be readily passivated. To achieve this alloy, zinc-nickel is usually plated from an alkaline electrolyte. For some applications, including the plating of brake castings, acid zinc-nickel can be used.

Advantages of Nuns Street Plating Enthone zinc-nickel plating processes:

  • Excellent corrosion resistance
  • Good alloy distribution
  • Excellent deposit distribution (alkaline)
  • Compatible for TriPass hexavalent-chromium free passivates
  •  Compatible with TriPass 7000 series cobalt-free passivates
  • Friction properties can be modified with Torque 'N' Tension fluids
  •  Specified and approved by many automobile manufacturers