Electrolytic Nickel S-Rounds

Vale™ Electrolytic Nickel S-Rounds™ are a high purity form of sulfuractivated nickel specifically designed for electroplating with titanium anode baskets – especially in chloride-free plating baths. The sulphur in this product does not enter the plating solution; it forms an insoluble nickel sulphide residue, which is 100% contained using cloth anode bags, where it acts to remove unwanted copper impurities. The controlled and consistent quality of S-Rounds™, their distinctive shape and size, and the advantages of sulfur activation make Vale™ S-Rounds™ ideally suited for high-end electroplating applications (e.g. high-speed engineering, electronics, electroforming):

  • High purity
  • Sulfur activation promotes uniform dissolution and low operating voltage, even in chloride-free plating baths
  • Unique shape prevents the formation of bridges and voids in the basket
  • Unique shape ensures good solution flow and mixing through the basket
  • Settles uniformly in basket, ensuring uniform current density and high quality deposits
  • Flows easily into regular and shaped baskets of various mesh sizes
  • Safe to handle (no sharp edges)
  • Dissolves at 100% anode efficiency in common nickel plating solutions – with or without chlorides
  • Produces minimal metallic residues upon dissolution
  • Proven and trusted by the world’s leading electroplaters

S-Rounds™ are produced by electrolytic refining at Vale’s Thompson Nickel Refinery in Manitoba, Canada, in accordance with ISO 9001:2008 standards.

Typical Specifications

  • Button-shaped pieces of nickel
  • Diameter: approximately 25 mm
  • Thickness: approximately 6.5 mm

Packing Density

  • Approximately 4.6 g/cm3 of basket capacity


  • 10 kg bags, 5 bags per box, 20 boxes per pallet (1,000 kg net weight)
  • 250 kg steel drums, 4 drums per pallet

Chemical Analysis (wt %)

  • Ni* >99.90
  • Co <0.065
  • Cu <0.0008
  • C <0.0035
  • Fe <0.0003
  • S ~0.019 - 0.025
  • As <0.0015
  • Pb <0.0003
  • Zn <0.0002

*Nickel determined by difference.