This technical information has been contributed by
The Electrolizing Corporation of Ohio

Plating/Finishing: Electroless Nickel

Metal Finishing - Electroless Nickel

Electroless Nickel is an autocatalytic chemical reduction process (no electric current is used) that deposits a nickel-phosphorus alloy in a uniformly hard, highly protective finish. By increasing surface hardness, Electroless Nickel improves resistance to friction, wear and corrosion. Our process prolongs by 2-to-10 times the service life of parts and components. Different Electroless Nickel baths produce different deposit characteristics. Since no anodizing is required, edge buildup is virtually eliminated.


Electroless Nickel plating has been successfully proven in a wide range of applications, including:


Chemical/Corrosion Resistance
Electroless Nickel offers excellent resistance to corrosive environments. Because of the superior density and alloy structure of the deposit, there are fewer cracks through which the base metal is affected.

Hardness & Wearability
Electroless Nickel can be hardened to Rc68 by heat treating at 650 - 700F (343 - 371C) for one hour. Electroless Nickel provides a dramatic increase in hardness, compared with electro-deposited nickel (Rc46 as deposited) and standard chrome baths (Rc62-64 as deposited). Abrasion tests comparing Electroless Nickel with similar processes show that Electroless Nickel produces a hardness comparable to standard hard chrome.

Electroless Nickel does not substantially affect the surface finish of parts. A part with a 15 micro-inch finish prior to plating will have approximately the same finish after plating. All components must be ground or polished to final finish prior to plating.

Electroless Nickel adhesion to steel can withstand a force of 40,000-60,000 psi (176-263 kg/sq cm). The coating may be ground or honed using methods appropriate to its hardness.

This technical information has been contributed by
The Electrolizing Corporation of Ohio

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