The process of plating metal, including nickel plating, has been used to strengthen metal against corrosion and wear for hundreds of years. It has also been used to enhance the appearance of metal, which otherwise may be quite dull and not so pleasing on the eye. There are various methods of plating that have been used over the years, and still are today, including electric and chemical methods of dispersing the layer of metal coating onto a substrate.
An Historical Overview of Electroless Nickel Plating
The electroless nickel plating of metallic nickel from an aqueous solution in the presence of hypophosphite first occurred as a chemical accident by Wurtz in 1844. Progress in the field of electroless nickel plating didn’t progress much until after World War Two, when in 1946, Brenner and Riddell developed a process for plating the inner walls of tubes with nickel-tungsten alloy, which was derived from the citrate based bath using an insoluble anode, bringing out the unusual reducing properties of hypophosphite.
An Alternative Process to Conventional Electroplating
During the 1954-59 period, Gutzeit at GATC (General American Transportation Corporation) worked on full scale development of electroless plating by chemical reduction alone, as an alternate process to conventional electroplating.
A study was then conducted in 1966, in which the co-deposition of particles was carried out for electrodepositing Ni-Cr by Odekerken. The study revealed that an intermediate layer consisting of finely powdered particles such as aluminium oxide and polyvinyl chloride (PVC) resin were distributed within a metallic matrix.
This meant that a layer in the electroless coating was composite, but that other parts of it were not. The first commercial application of their work occurred in 1981, when they used the electroless Ni-SiC coatings on the wankel internal combustion engine and another commercial composite incorporating polytetrafluoroethylene (Ni-P-PTFE).
The Co-Deposition of Diamond and PTFE Particles in Electroless Nickel Plating
The co-deposition of diamond and PTFE particles was proven to be more difficult, and The feasibility to incorporate the fine second phase particles, in submicron to nano size, within a metal/alloy matrix has initiated a new generation of composite coatings.
Composite Coatings of Electroless Nickel
Here at NiTEC UK, we provide a number of electroless nickel composite coatings including nickel diamond plating, nickel PTFE and nickel boron. For more information about the composite nickel coatings offered by NiTEC UK, contact us on 0845 224 3571 or email us at firstname.lastname@example.org. Our staff will formulate the right solution for your application, providing advanced nickel composite plating services to meet your needs.