Zinc-Nickel (Zn-Ni) coatings, containing 10-15% Nickel, are electroplated onto parts to provide corrosion resistance superior to that
of standard zinc plating. These coatings, often used in the automotive industry, typically have a dull grey appearance when applied without conversion or top coatings Notably, Zn-Ni coatings can meet REACH and RoHS compliance standards, provided hexavalent chromium is not used as a conversion coating.
- Superior to Standard Zinc Plating: Zinc-nickel alloy plating is now
cost-effective due to technological advancements, offering an
improvement over standard zinc plating and a non-toxic alternative to
cadmium plating.
- Galvanic Corrosion Protection: Zinc-nickel plating bridges the
galvanic gap between steel and aluminum, reducing galvanic corrosion
risk and rate. It offers sacrificial protection similar to cadmium,
protecting steel even in case of scratches or cracks.
- Enhanced Corrosion Resistance: Zinc-nickel plating (10um
unpassivated) withstands 500+ hours of neutral salt spray testing before
red corrosion, compared to 120 hours for similarity thick zinc-plated and
passivated parts.
- Available Finishes: LEPL provides zinc-nickel plating in various
thicknesses with options for unpassivated or clear passivated finishes,
as well as available topcoats (whits, black & olive drab).
- Temperature Performance: Zinc-nickel maintains good unpassivated
corrosion resistance and can be further improved with passivates and
topcoats It performs better than zinc plating in high-temperature
applications, where passivates lose effectiveness.