Electroless Nickel Plating

Electoless-Nickel-Plating-smallElectroless nickel plating is an auto-catalytic reaction used to deposit a coating of nickel on a substrate. Unlike electroplating, it is not necessary to pass an electric current through the solution to form a deposit. This plating technique is to prevent corrosion and wear. EN techniques can also be used to manufacture composite coatings by suspending powder in the bath.  Electroless nickel plating has several advantages versus electroplating.

Electroless Nickel Plating Properties

  • Free from flux-density and power supply issues, it provides an even deposit regardless of workpiece geometry, and
  • With the proper pre-plate catalyst, can deposit on non-conductive surfaces.
  • Exceptionally good for part salvage purposes.
  • Good corrosion, oxidation, and wear resistance.
  • Facilitates soldering on aluminum and brazing on stainless steel.
  • CLASS 1 and CLASS 2 coated steel parts, Rockwell C40 or above, are baked for hydrogen embrittlement relief. CLASS 2 coated parts are additionally heated to 500 degrees F or more, to harden the nickel deposit to 800 Knoop or better. CLASS 3 and 4 coated parts shall be baked for 1 to 1.5 hours at 375 degrees or 250 degrees F.

Due to the high hardness of the coating it can be used to salvage worn parts. Coatings of 25 to 100 micrometres can be applied and machined back to final dimensions. Its uniform deposition profile mean it can be applied to complex components not readily suited to other hard wearing coatings like hard chromium.  CRC-Surface Technologies offers low (<5%), mid (5 to 9%) and high (10 to 13%) phosphorus electroless nickel plating processes.  Applicable specifications for electroless nickel are MIL-C-26074, MIL-F-14072 (M265), AMS 2405, MIL-STD-171, ASTM B733, AMS 2404 and ASTM B656.

To learn more about our electroless nickel plating services contact sales at (602) 288‐6190 or visit our operation located at: 1101 W Hilton Ave Phoenix, AZ 85007

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