Tag Archive for uniform metal coating

Top 3 Benefits of High Phosphorus Electroless Nickel

The phosphorus content in an electroless nickel coating is a key component in the determination of the properties of that coating. There are varying levels of phosphorus content, and each provides unique properties. High phosphorus electroless nickel typically contains a phosphorus content of between 10-12%, making it ideal for applications where a uniform, hard and highly corrosion resistant coating is required. Here are the top 3 benefits of a high phosphorus electroless nickel coating.

Hardness

Electroless nickel coatings with a high phosphorus content offers high levels of hardness and a lack of porosity, which makes it an ideal barrier coating for components, especially those that are used in hostile environments or are subject to aggressive use. The as-plated hardness of electroless nickel is approximately 48-52 Rc, but it can be heat treated to 68-70 Rc for a more wear resistant finish.

Corrosion Resistance

High phosphorus electroless nickel coatings are recommended where the maximum level of corrosion protection is needed. This makes it ideal for industry standards requiring protection from highly corrosive acidic environments such as oil drilling and coal mining.

Uniformity

The process of high phosphorus electroless nickel plating involves a chemical reaction, rather than electricity which is used in electroplating. Electroplating often produces a number of unwanted effects such as edge build up, uneven thickness, no plating in corners and recesses etc.

But electroless nickel plating, on the other hand, guarantees full coverage that is so uniform that the surface finish is normally duplicated. This also eliminates the need for post plate grinding or polishing. Even complex shapes such as threads keep their original geometry after plating.

Other advantages of high phosphorus electroless nickel are as follows:

  • Low porosity
  • Non-magnetic
  • Less prone to staining
  • Pit-free deposits
  • Fast deposition rate throughout life
  • Consistent deposition rate throughout life
  • Very stable and robust

Corrosion Resistant Metal Coating

If you are looking for a highly effective corrosion resistant metal coating, high phosphorus electroless nickel is a great solution. Call the NiTEC team on 0845 224 3571, email info@nitec-enp.co.uk or get in touch via our contact page.

The Advantages of Electroless Deposition of Nickel

Electroless solutions have the advantage of producing coatings which have a very high degree of uniformity. This means that electroless nickel is ideal for plating complex shapes and can be used effectively to salvage parts that have been mis-machined. It also allows worn components to be recycled.

Electroless nickel deposits vs electrolytically-applied coatings

Electroless nickel deposits are chemically applied using an autocatalytic immersion process which does not use an electrical current.

This is much different from electroplating, which depends on an external source of direct electrical current to produce a deposit on the substrate material. Because the electrical current cannot be evenly distributed throughout the component itself, it is hard to obtain a uniform deposit with electrolytically-applied coatings.

Electroless nickel is often chosen above electrolytically applied coatings because of its ability to coat irregularly shaped, highly detailed parts with complex geometries. The completely uniform deposit thickness is perfect for achieving close dimensional tolerance capabilities.

If you would like to find out more about using electroless plating as an alternative to electroplating, call us on 0845 224 3571, email us at info@nitec-enp.co.uk or visit the contact page on our website to make an enquiry.