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Electroless Nickel

Electroless Nickel plating is a non-electrolytic, auto-catalytic, immersion chemical plating method of depositing a Nickel Phosphorous alloy for engineering applications, deposits from 5 to 75 micron thickness can be applied to most metallic substrate materials, for a wide range of applications.

Electroless Nickel is classed as a “COLD” process, with application process temperatures in the order of 85 – 95°C, ensuring no detrimental effects to the physical and mechanical properties of the base materials. Electroless Nickel for engineering applications is covered by ASTM B656-86 and B733-86.

Localised deposits can be produced by masking areas that do not require plating.

Electroless Nickel Plating (AMS 2404E)

Maximum Thickness: 75 um                                               Maximum Plating Rate: 12.5um/hr

Maximum Length – 3600mm                                              Maximum Diameter or Width – 850mm

Maximum Weight – 5 tonne                                                Floor to Hook Height 3T crane: 5.20m

Maximum Length on Flight Bar A10 and A11: 1600mm


High Hardness

Excellent Corrosion Resistance

1,000 Hours Salt Spray Test

5-75 Microns Thickness

Good Wear Resistance

Low Friction

For Ferrous and Non-Ferrous Metals

Uniform Coating Thickness

Up To 67 HRc Hardness

“Cold” Process

Corrosion Resistance

Electroless Nickel is a barrier coating with excellent resistance to chemical and corrosive attack by all but the most severely oxidising agents. Tests to ASTM-B117 show Neutral Salt Spray corrosion resistance up to 1000 hours.

High Hardness

A typical hardness of electroless Nickel, as deposited is in the range 450-480 H.V. (46-48 Rockwell C.) However, the deposits can be precipitation hardened by heat treatment at 400°C for one hour, to 800-950 H.V. (64-68 Rockwell C.) This heat treatment will also improve adhesion and wear resistance.

Low Coefficient of Friction

The Phosphorous content of Electroless Nickel provides natural lubricity and helps minimise heat build-up, reducing galling and scoring. The coefficient against Steel of 0.13 lubricated (0.14 dry) proves the excellent frictional properties, being approx. one half that of steel. This allows extensive use for machinery and Automotive componentry, where friction is a problem.

Typical Applications for Electroless Nickel

Hydraulic and Pneumatic Components
Rods, Pistons, Cylinders

Pumping Equipment
Housings, Rotors, Impellors,Valves, Fittings, Shafts

Valve Components
Balls, Gates & Discs, Plugs,Butterflies and Shafts

Mechanical Components Oil and Gas Equipment
Packers, Rods, Fire Tubes and Barrels

Plastic Moulds, Dies, Screws and Fittings Food Equipment
Gang Knives, Slicing Blades, Bowls, Mixing Blades, Presses, Timing Screws, Hooks, Conveyor Chain

Automotive Components
Diff Pins, Rocker Arms, Steering Unit Comp., Shocker Rods, Brake Pistons, Fuel Injection Comp., Trans. Thrust Washers

Chemical Equipment
Heat Exchangers, Filter Units, Mixing Equipment, Tubing

Scientific Equipment Medical Components Foundry Patterns, Paper and Pulp, Textile
Equipment and Aerospace Components.

Hours to failure

Uniform Coating Thickness

Relationship with Heat Treat Temperatre for Nickel Phosphorus Coatings

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