Zinc-nickel, ZnNi for short, is an electrolytic, inorganic, corrosion-protecting coating system for components in extremely corrosive environments.
It provides significantly better corrosion protection than zinc alone.
The zinc layer is alloyed with 12–15% nickel in the layer.
Zn/Ni meets the nickel emissions requirements according to SS-EN 1811.
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The thickness of the coating can be adapted to customer requirements, but provides extremely good corrosion-protecting properties even with thin coatings, >5 μm.
This coating does not create galvanic corrosion in aluminium joints.
It has a low potential difference, which relates to the amount of energy required to move an electrical charge from one point to another.
The application temperature range is <+300°C
Abrasion resistance is hardness 450HV.
If you need friction control, this can be attained with a sealer/topcoat.
Applications placed in an extremely corrosive environment such as:
Applied by hanging or drum application.
> 720 hrs to base material corrosion according to ISO 9227 (NSS).
A sealer provides increased corrosion protection.