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Electroless Nickel Surface Finishes
CNC Machined Parts Electroless Nickel

● Electroless nickel deposition is a process for the co-deposition of nickel-phosphorus alloys without the need for an applied electric current.

● Instead of depositing ions from an applied current, this electroless nickel process chemically reduces nickel ions to the metal substrate in an electroless nickel solution. Therefore, the electroless nickel layer does not suffer from many of the problems associated with conventional electrolytic nickel, such as edge build-up and coating non-uniformity. The electroless nickel layer is very uniform, resistant to corrosion and corrosion, and has excellent lubricating properties.

Types of Electroless Nickel for CNC Machined Parts

TypesPhosphorus content(%, Weight)HL Parts
Type INo requirement
Type ll1-3 Ultra low phosphorus
Type lll2-4 low phosphorus
Type IV5-9 middle phosphorus
Type v≥10 high phosphorus

The Use Environment of Each Film Thickness Coating after Surface Treatment of CNC Machined Parts

Service
conditions
Mini Plating
Spec
Film
Thickness(μm)
Use Environment
SC0Mini Thickness0.1In special environments,required to block diffusion
SC1Light service5Lubrication and wear under light loads, corrosion protection at room temperature
SC2Mild service13Exposure to dry or oily industrial environments
SC3Moderate service25Non-marine outdoor exposure, high temperature alkaline salt environments and moderately abrasive environments
SC4Hard service75Acid solution, high temperature and pressure, very severe abrasion and marine immersion environment
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