Chemical nickel plating DIN 50966 – Fe / NiP

Chemical nickel plating is an autocatalytic reduction of nickel (precipitation), the catalyst being the base metal (Fe or Al) deposited on the nickel and phosphorus (NiP) alloy coating. The main difference between classic electrolytic nickel plating and chemical nickel plating is that the chemical nickel plating is done without the use of electricity, therefore without the use of anodes, as well as in the coating characteristics. Since no current is used, chemical nickel coatings are of equal thickness over the entire surface of the object (no unequal distribution of potentials along the edges), therefore, chemical nickel is suitable for objects of complicated geometry – cavities, pipes, holes, etc. The precipitated coating hardness of 550 HV (50-52 HRc) is much higher than the hardness of electrolytic nickel, and after thermal treatment, the hardness is increased to the hardness of 1000 HV (67-70 HRc) hard chromium, so the process can replace hard chromium in many cases – especially for small items.

Basic characteristics of chemical nickel:

• equal thickness of coating over the entire surface
• equal thickness of coating inside the pipe
• phosphorus content in the coating 7-9% or 10-12%
• outstanding corrosion protection
• amorphous (lamellar coating) is not porous
• high coating hardness – up to 1000HV
• high abrasion and abrasion resistance
• nickel plating of objects of complicated geometry
• nickel plating to a given tolerance without the need for subsequent grinding
• possible coating thickness up to 100 microns, with a tolerance of +/- 2 microns
• alternative to hard chrome plating
• materials: steel, cast iron, aluminum, copper, brass, stainless steel

Chemical nickel coatings are increasingly used in the automotive and aerospace, shipbuilding, mechanical engineering, chemical, pharmaceutical, petrochemical, food, and electrical industries.

Chemical nickel is used to protect various shafts, bearings, bores, nuts, bolts, machine elements, PVC injection molding tools, gears, fittings, pump parts, valves, hydraulic pistons and cylinders, molds, etc.

Maximum dimensions of objects that can be processed:

  • length: 1.300 mm
  • height: 800 mm
  • width: 400 mm
  • diameter: 800 mm
  • weight: up to 130 kg