Electroless nickel plating isn’t a single, fixed coating. Different formulations give you different levels of hardness, corrosion resistance, flexibility and protection from wear. When you understand the options, you can choose a finish that suits your component.
Low phosphorus coatings
Low phosphorus electroless nickel plating contains a relatively small amount of phosphorus and provides high hardness and strong resistance to wear, so it’s useful for components exposed to friction or abrasive conditions.
Medium phosphorus coatings
Medium phosphorus coatings give you a balance between hardness and corrosion protection. They’re used in engineering and manufacturing because they suit many general purpose applications. You can discover more at specialists such as www.swmf.co.uk/surface-coatings/electroless-nickel-plating/.
High phosphorus coatings
You’ll need high-phosphorus electroless nickel plating when corrosion resistance is your main concern. The coating will protect your components in damp, chemically aggressive or demanding environments. It also has a smooth, even finish across complex shapes.
Composite nickel coatings
Composite coatings include additional particles within the nickel layer. Things like silicon carbide increase wear resistance and other particles are used to reduce friction. You can match the coating to applications involving sliding parts, machinery or specialist tools.
Duplex nickel coatings
Duplex systems have two electroless nickel layers which have different properties. For example, one layer may improve corrosion resistance while the other one increases hardness. This means your coating will deliver broader protection than a just single formulation.
The best choice for you will depend on the part’s material, tolerances and operating conditions. Discuss these factors early so you can select a coating that supports performance and durability.
