Apr 04

Advantages of a High Phosphorous Electroless Nickel Alloy

An electroless nickel coating is a dense alloy of nickel and phosphorus. The amount of phosphorus co-deposited can range from less than 2% to more than 12%, depending upon bath formulation, operating pH and bath age.

High phosphorous electroless nickel plating tanksAn electroless nickel coating with a high phosphorous content is extremely effective in the oil, gas and coal industry. These environments are highly corrosive and therefore require a phosphorous content of more than 10%.

Phosphorous content in electroless nickel deposits can vary from 1 – >12% by weight and the variation can be controlled to result in a number of deposit types.

High Phosphorus Deposits

  • Typically contain 10-12% phosphorus
  • Very high corrosion resistance
  • Complete lack of magnetic response.
  • Most conditions in the highly corrosive oil, gas and coal industry require deposits with a high phosphorus content (>10%).

Low Phosphorus Deposits

  • Typically contain 2-5% phosphorus.
  • Improved hardness and wear characteristics
  •  Higher temperature resistance
  •  Increased corrosion resistance in alkaline environments.
  • Best suited to the chloro-alkali industry, such as the transportation of liquid soda.
  • Enhanced solderability and bondability, especially in electronic applications.

Mid Phosphorus Deposits

  • Typically contain 6-9% phosphorus
  • Bright and aesthetically pleasing
  • Good hardness and wear resistance
  • Moderate corrosion resistance

Alkaline nickel-phosphorus

  • Plate at a relatively low temperatures (75-140°F, 24-60°C)
  • Suitable for plating on plastics and other nonconductive materials
  • Suitable for use on zincated aluminum.

If you would like to find out more about electroless nickel plating with high phosphorus nickel deposits for use in the oil, gas and coal industry, please visit the NiTEC website.