Zinc Nickel Plating Vs Cadmium Plating

To overcome this shortcoming multi layer metal plating can be used and nickel is the intermediate layer.

Zinc nickel plating vs cadmium plating.

Zinc alloys zinc cobalt zinc nickel zinc iron and tin zinc are the most common substitutes. Zinc nickel can also provide high temperature corrosion protection about 500 f where many other finishes begin to fall off in performance. The disadvantage is that it has porosity. In industrial terms plating refers to the coating of a conductive material with a metal.

The key difference between zinc and nickel plating is that the purpose of zinc plating is to apply a thin coating of zinc on a conductive substance whereas nickel plating involves the application of a thin layer of. The parts are threaded assemblies and maintaining tight dimensions is critical. Zn ni alloy coatings usually composed of approximately 85 zinc and 15 nickel are electroplated on carbon steel as a protective coating in a process similar to the way zinc coatings are applied. Zinc nickel is used to plate fasteners for use in high corrosion areas under the hood and chassis joints.

In electronics zinc nickel is used to plate connectors where zinc nickel has been used as a direct cadmium replacement. The argument for an equivalent to cadmium plate has been going round and round. Summary zinc vs nickel plating. When the industry was looking for a viable replacement to cadmium they tried zinc electroplate.

Zinc nickel delivers corrosion resistance and high electrical conductivity. Main difference cadmium plating vs zinc plating. In search of alternatives. A discussion started in 2002 but continuing through 2019.

Common specifications for zinc nickel are found throughout vehicle manufacturing industry and astm b841 or ams 2417. In conclusion zinc plating and nickel plating are very important processes in the industry. In 1956 over 60 percent of all cadmium was used for coating iron or steel. It is very important to not specify cadmium plating indiscriminately because of its health effects in fact it is prohibited from many applications in many countries.

Nickel plating has high hardness is easy to polish has high light reflectivity and can increase aesthetics. Zinc nickel provides performance for the cost premium relative to zinc and cadmium plating. Nickel to iron is a cathodic coating and copper is an anodic coating. We are currently looking for an alternative to cadmium plated parts.

This coating can be for a decorative purpose corrosion inhibition to harden improve wearability reduce friction alter conductivity etc. However over the years this has decreased to as little as 7 percent in 2006 and materials like zinc nickel plating are seeing more and more use.