Process sheet · Zn-Ni

Zinc-nickel

An advanced engineering coating that electroplates a metal alloy of 8% to 15% nickel, with the balance zinc. This alloy forms a protective barrier that retains its high corrosion resistance even after heat exposure. It is currently the coating most in demand by automotive OEMs to protect components exposed to the harshest service conditions.

Typical applications
Brake system components, under-hood brackets and fasteners exposed to engine heat, fuel system connections, and chassis or suspension parts subject to constant humidity and road salt.
Available finishes
Full range of trivalent passivates: clear (blue), iridescent (yellow) and black.
Cross-sectionZn-Ni · 8–15 % Ni
Trivalent passivateColor and added protection
Zinc-nickel8 to 15 µm · 8 to 15% Ni
Base steelCustomer part
Illustrative diagram, not to scaleµm
Technical data

Technical specifications

Base material
Steel
Nickel content
8 to 15% by weight
Coating thickness
8 to 15 µm
Hexavalent chromium
Free (restricted under RoHS/ELV)
Plating method
rack (hung) and barrel (bulk)
Part size
Under one meter in length
Minimum lot
50 kg
Corrosion resistance
Validated by an external laboratory
Coating thickness8–15 µm
Alkaline zinc
8–15
Zinc-nickel
8–15
Heavy phosphate
8–12

Coating thickness range for each process, in microns (µm). 1 µm is one thousandth of a millimeter.

FAQ

Quality control and FAQ

Why is zinc-nickel priced differently from alkaline zinc?

The use of nickel salts in the plating baths and the need for rigorous analytical control raise operating costs. In return, it significantly reduces the risk of claims due to premature rust on critical parts.

How do I know if my part requires this process?

If the specification on your drawing calls for a zinc-nickel coating, this process is mandatory. If you are unsure, send us the drawing and we will advise you.

How do you validate corrosion performance?

We perform in-house checks of thickness, adhesion and bath chemistry, and validate corrosion resistance time through an external laboratory, according to your customer's specification.

Quote

Have a part that needs protection?

Tell us the material, the required specification and your monthly volume. We will review your drawings and prepare a technical proposal tailored to your needs.