Zinc-nickel coatings – alkaline process

Zinc-nickel coating has been established since the 1990s as a means of high-quality corrosion protection for steel. It is primarily used in automotive manufacturing, but it is also increasingly being used globally to meet high demands for corrosion protection.

During zinc-nickel electroplating, between 14% and 16% nickel is electrolytically incorporated into the coating as an alloying element at an electrolyte temperature of approx. 28°C.

To increase the corrosion protection, a transparent or black passivation layer is then applied to the zinc-nickel, with a thickness of approx. 60 to 80 nanometres.

The components can then be provided with a silicate-based or polymer-containing sealer to further improve scratch resistance and corrosion protection. (This is essential in the case of black passivation).

This results in an extremely long-lasting coating that exceeds the corrosion protection of conventional zinc coatings ten-fold – with the same thickness (e.g. 8-15 micrometres). Thanks to the good distribution of layer thickness, features such as threads are no problem.


  • Extremely high corrosion protection
  • Good layer thickness distribution
  • No release of nickel

Layer structure:

Corrosion protection:

  • Up to 240 h without zinc corrosion
  • Up to 1000 h without base material corrosion in a neutral salt spray test

Standard examples:

  • DIN 19598 – Fe//ZnNi8-15/An//T2
  • Daimler Benz: DBL 8451.66
  • DAF: WO 230
  • Volvo: STD 121-0015 Y1500-3 bzw. 4
  • MAN: M 3536 S bzw. SV
  • VW: 13750 r642/r643
  • Liebherr: LN 252-7
  • Voss: WN 3006-1