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Mid Phos Electroless Nickel Plating Services

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Mid Phos Electroless Nickel Plating Services
Mid Phos Electroless Nickel Plating Services

TWR's Mid Phosphorous "Bright" 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 0.7-1.0 mil per hour, depositing a Nickel Phosphorus coating that is bright in appearance while maintaining the engineering properties of an ElectrolessNickel plate. The deposit's corrosion resistance functions as a barrier coating. 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.

Mid Phosphorous Electroless Nickel Spec Sheet

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Nickel Content 91-95%
Phosphorous Content 5-9%
Internal Stress > 420-1000 MPa
Elongation .5%-1% permanent strain
Modulus of Elasticity 50-65 GPa
Density 8.1-8.4 g/cm3
Melting Point 880°C (1620°F)
Hardness As Plated - 500-650 VHN100 (50‑55 Rockwell C)
Heat Treatment - 85‑1000 VHN100 (65‑70 Rockwell C)
Electrical Resistance 70‑110 uohms/cm2
Thermal Conductivity 0.012 cal/cm/sec/°C
Coefficient of Thermal Expansion 10-16 µm/m/°C
Magnetic Properties Slightly Magnetic to Magnetic
Coefficient of Friction vs Steel 0.40 non lubr. to 0.13 lubr.
Taber Wear Resistance As Plated - 16-20 mg/1000 cycles
RoHS & ELV requirements for cadmium <100ppm, no mercuryand lead <1000ppm are met by this coating

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