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Electroless Nickel Plating

Electroless Nickel Plating Services for Advanced Manufacturers

AOTCO is one of the largest electroless nickel plating specialists in North America. We offer a variety of solutions including Electroless Nickel High-Phos, Mid-Phos, and Low-Phos. In addition, we also offer Electroless Nickel Boron-Nitride, Electroless Nickel Boron, Electroless Nickel Teflon PTFE, and others. 

The primary use for Electroless Nickel is used for corrosion and wear resistance, hardness, solderability & as an under-plate for other metals, providing the desired uniformity for many applications. As the name suggests, Electroless Nickel deposition does not require rectifiers, anodes or electrical current.

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Electroless Nickel Low-Phos, Medium-Phos, & High-Phos

Electroless nickel provides uniform buildup on materials with complex shapes/geometry and across all external and internal surfaces.

AOTCO offers Low-, Medium- and High-Phosphorous Electroless Nickel coatings along with ROHS compliant applications, including Black Nickel.

We also offer Electroless Nickel Boron-Nitride, Electroless Nickel Boron, Electroless Nickel Teflon PTFE, and others.

  • Low-Phosphorus Electroless Nickel can be used to replace Chrome Plating in many cases. 
  • Medium-Phosphorus Electroless Nickel is the standard and most common type for most applications
  • High-Phosphorous Electroless Nickel can be used to obtain mirror finishes by machining or grinding back some of the coating.
  • Other Electroless Nickel Solutions include:
    • Electroless Nickel Boron
    • Electroless Nickel Boron-Nitride
    • Electroless Nickel Teflon PTFE
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Benefits of Electroless Nickel Plating
  • Excellent solderability
  • Corrosion protection
  • Excellent hardness / wear resistance
    • Rockwell hardness of 47-53; can be hardened up to 72 with a heat treatment
    • High uniformity of deposition, especially for complex parts
    • Useful for salvaging mis-machined parts
Electroless Nickel Applications & Industries
  • Electronics
  • Defense
  • Aerospace
  • Medical
  • Telecommunications
  • Optical
Electroless Nickel Physical Properties & Specs
  • Coating Thickness:
    • For Aluminum-based alloys: minimum of .001 inches
    • For Copper, Nickel, Cobalt, Titanium and Beryllium alloys: minimum of .0005 inches
    • For Iron-based alloys: minimum of .0015 inches
  • Aesthetic Appearance:
    • Similar to stainless steel
  • Ferrous: All ferrous alloys including many Steel alloys
  • Cuprous: Pure Copper and all cuprous alloys including Copper Molybdenum, Copper Beryllium (BeCu), Copper Tellurium (TeCu), Brass & more
  • All Aluminum Alloys Including Wrought, Cast and Proprietary Alloys (MIC-6)
  • Exotics & Others: Inconel, Kovar, Monel, Tellurium, Magnesium, Nickel, Lead & more
  • Copper
  • Electrolytic Nickel
  • Electroless Nickel
  • Silver
  • Tin
  • Lead
Pre-Treatments Available
  • Mechanical Cleaning
  • Custom Masking
  • Chemical Films
Post-Treatments Available
  • Laser Marking
  • Engraving
  • Chemical Films
  • Hydrogen Embrittlement Stress Relief
Electroless Nickel Types : High Phosphorus, Medium Phosphorus, Low Phosphorus, Nickel-Boron, Nickel-Boron Nitride, Nickel-Teflon PTFE
  • Low-Phosphorus Electroless Nickel (2% – 5% phosphorus)
  • Medium-Phosphorus Electroless Nickel (6% – 9% phosphorus)
  • High-Phosphorus Electroless Nickel (10% – 13% phosphorus)
  • Black Nickel
  • Electroless Nickel Boron
  • Electroless Nickel Boron-Nitride
  • Electroless Nickel Teflon PTFE
Electroless Nickel Specs & Certifications
  • ASTM B733 --- NADCAP Approved, ROHS Compliant
  • AMS 2404
  • AMS 2405 --- NADCAP Approved, ROHS Compliant
  • AMS-C-26074 --- NADCAP Approved, ROHS Compliant
  • MIL-C-26074 --- NADCAP Approved, ROHS Compliant
  • Various company specifications

Looking for Specs?

Learn more about the specifications AOTCO offers, including NADCAP-accredited and RoHS-compliant ones.
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