Electroless Nickel Plating

More resistance to abrasion and corrosion

Electroless Nickel Plating is a special coating that does not require electric current, power supply or anodes for its application. The alloy deposition occurs by means of the chemical or autocatalytic reaction between the dissolved agents (Nickel Sulphate + Sodium Hypophosphite) in aqueous solution; when the part is immersed in this solution after appropriate pre-treatment, all of its surfaces are coated with totally uniform nickel-phosphorous alloy layers, independent of its geometric format.

Layer Properties

Electroless Nickel

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.

Especificações técnicas