Layer Properties

Adhesion: it deposits itself in any ferrous or non-ferrous metal, including those thermally treated or nitreted.
Millesimal layer tolerance: it does not require subsequent machining or grinding
Total penetration: homogeneity of the layer in any geometric form. Even in parts with complex and irregular geometry, the material deposits itself uniformly in sharp edges and holes, without the need of subsequent polishing.
Resistance to corrosion directly related to the porosity and phosphorus levels present in the alloy. Generally, alloys with a high phosphorus content are more resistant.
High superficial hardness that may reach up to 69 HRC.
Adherence to the upper layer and good ductility.
Porosity-free layer: protection by insulation.
Stainless steel appearance. The stainless steel look, slightly yellowish, will present brightness and roughness, depending on the final polishment of the substrate on which the alloy will deposit itself.

Resistance to use depending on the hardness and layer of the applied thermal treatment. Generally, medium and low phosphorous alloys are more resistant
Uniform finishing, maintaining the base’s roughness.
Controlled layer thickness between 2µ and 150µ
Natural lubricity and releasing properties, a factor that favors the use of chemical nickel in plastic and injection mold industries, as it facilitates the release of the material, protects the tool and affords economy, once it does not require the use of a releasing agent.
Coefficient of friction 0.6.
The thermal treatment and the phosphorus percentage do not affect the chemical nickel’s frictional properties.
The lubricity increases in PTFE compounds.
The coefficients of friction vary from 0.17 (dry) to 0.07 in humid/lubricated conditions.

Types of Electroless Nickel Plating

SFB [2 to 4% of P]

A bath that provides deposits higher than 60 Rockwell, with values similar to those of hard chrome, with the advantage of the layer uniformity in complex parts. The nickel with low phosphorus content offers excellent resistance to corrosion in alkaline conditions.

SFM: [High-velocity bright 5-9% of P]

Most suitable for parts that will be exposed to wear, it presents better performance in abrasive conditions. Parts coated with medium-phosphorus and nickel content have a performance similar to that of stainless steel, high brightness and 45Rockwell hardness [which can be increased to 68 Rockwell when exposed to thermal treatment].

SFA [9-13% P]

A finishing that affords maximum corrosion resistance. High-phosphorus nickel is the standard in the industries that require protection for highly corrosive and acid environments. With high solderability grade, remaining for long periods, it is widely used in the automotive, petroleum and gas industries. In the salt spray test it exceeds 1,500 hours of testing.