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High Phosphorus Electroless Nickel Plating Services

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High Phosphorous Electroless Nickel Plating Services

TWR Service Corporation's High Phosphorus Electroless Nickel is designed by the manufacturer to provide a high quality electroless nickel deposit from a highly stable plating solution at an economical cost. The bath plates at approximately 0.3-0.5 mil per hour, depositing a nickel phosphorus coating that provides the optimum in corrosion protection and engineering properties. The deposit's corrosion resistance functions as a barrier coating. It is resistant to attack by any but the most severely oxidizing environments. The deposit is completely amorphous (no crystal or phase structure). If the deposit is heat treated, particles of Ni3P will precipitate and the coating crystallizes, resulting in a significant increase in the hardness and wear resistance.

Non-electrolytic plating offering unique deposit properties. Threads, small diameter holes, recesses and internal areas are plated with a uniform thickness as well as sharp corners, edges or flat surfaces. EN provides excellent corrosion, wear and abrasion resistance, ductility, lubricity, solderability, and electrical properties. High-phos EN also provides enhanced corrosion protection compared to mid-phos or low-phos EN. Hardness of the deposit as plated is 46-48 Rockwell C (Rc). Ratings of 66-70 Rc are obtained by heat treating.

High Phos Electroless Nickel Spec Sheet

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High Phosphorous Electroless Nickel Plating Services Capabilities

AMS 2404
Copper Alloys
Leaded and Non-leaded Steel
Stainless Steel
Tool Steel
Plating Thickness 0.00005" to 0.00350"
Finishes Plating finish emulates the base material
Quality Assurance Mil-C-45662
Mil-I-45208 with the inspection schedules in accordance with Mil Std. 105
Order Quantity From single-quantity/prototype to large batches (~1000s of parts)
Typical Lead Time 3 Working Days ARO (Standard)
Expedited Same Day Service (On Request)
Compliances Meets RoHS & ELV Requirements for Cadmium, Lead and No Mercury


Nickel Content 87-89%
Phosphorous Content 10-13%
Internal Stress Neutral to Compressive
Tensile Strength Greater than 700 Mpa
Elongation 2% Permanent Strain
Modulus of Elasticity 200 Gpa (2.8 x 108 psi)
Density 7.75 g/cm³
Melting Point 880°C (1620°F)
Adhesion Strength 140 to 400 Mpa (20-60 kpsi) depending on substrate
Hardness After Heat Treatment - 1000 to 1100 VHN100 (65 to 70 R<subc< sub="">)
As Plated - 490 to 515 VHN100 (49 to 50 RC)
Electrical Resistance 90 to 100 µohms/cm²
Thermal Conductivity 0.02 cal/cm/sec/°C
Coefficient of Thermal Expansion 8-10 µm/m/°C
Magnetic Properties Non-magnetic
Coefficient of Friction (vs Steel) 0.40 non lubr. to 0.13 lubr.
Taber Wear Resistance After Heat Treatment - 10-12 mg/1000 cycles
As Plated - 22-24 mg/1000 cycles

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