Electroless Nickel Coating

Electroless Nickel Coating

Process and advantages of Electroless Nickel Coating

ZEPNICASIL S.r.l. deals with a chemical nickel-plating system with a medium phosphorus content, which allows to obtain a uniform, constant, non-porous, adherent deposit on all treated surfaces, highly resistant to corrosion and wear. The coating type is a nickel-phosphorus alloy obtained from a self-catalytic bath.

Chemical nickel plating has had a big industrial increase since the seventies where, ZEPNICASIL S.r.l., has consolidated an important technical position in the surface treatment sector. In particular, this technology has always attracted customers in the engineering and other sectors for its excellent chemical-physical characteristics. It is suitable for the protection of all metals and alloys, moreover, it is particularly ideal for decorative functions thanks to its good aesthetic qualities.

In detail, the applicability of this chemical process concerns: *

  • IRON ALLOYS (PIG IRON, ALLOY STEELS, STAINLESS STEEL)
  • COPPER AND ITS ALLOYS (BRASS, BRONZE)
  • ALUMINIUM ALLOYS

* Treatment of metals in general, treatment of iron and ferrous alloys.

While the main industrial sectors interested in the treatment are those:

  • ALIMENTARY/PHARMACEUTICAL
  • AUTOMOTIVE / MOTORCYCLE
  • ELECTRONICAL /TELECOMMUNICATIONS
  • PRINTS FOR RUBBER/ PLASTIC/GLASS
  • PETROCHEMICAL
  • TEXTILE
  • HYDRAULIC AND PNEUMATIC
  • MECHANICAL / PRECISION MECHANICS
  • AERONAUTICS / AEROSPACE / NAVAL

Nickel plating treatment: main features

  • Homogeneous coating over the entire surface of the immersed piece
  • Reduction of the friction coefficient
  • Corrosion resistance
  • Abrasion resistance
  • Adherence of the carryover
Grafico prestazioni trattamento Nicasil process
Graph of chemical nickel-plating – Nicasil

The degree of performance of the coatings made with this chemical nickel-plating system also depends on the degree of finish of the base material, the characteristics of the substrate decisively influence the final aesthetic appearance in proportion to the thickness applied. For the final result, therefore, the choice of both the thickness and the post-nickel-plating heat treatment is crucial. Specifically, the heat treatment increases the surface hardness of the film from about 500 HV100 (uncured nickel) up to a maximum of about 1000 HV100.

(Heat treatment for 10 hours)

Since there is no electrical passage with hydrogen discharge as in the main electrolysis treatments, this technology greatly reduces the phenomenon of hydrogen embrittlement of the base material.

Another peculiarity is that of the high resistance to corrosion, this is because the deposit originating from the processing takes on a crystalline morphology of the low porosity coating. In proportion, the presence of nickel guarantees greater hardness to the entire surface.

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