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ARGUNA® 3430 Cyanide-free Hard Silver Electrolyte

ARGUNA® 3430 Cyanide-free Hard Silver Electrolyte

For deposition of wear-resistant silver layers with high hardness

ARGUNA® 3430 is an alkaline, cyanide-free electrolyte for the deposition of technically functional silver layers. 

The electrolyte does not contain any toxic cyanide compounds and can therefore be used in a simplified way under the increasing environmental and safety requirements. The deposited layers have excellent abrasion resistance and are particularly suitable for the application of highly stressed electrical contact surfaces. An excellent thermal resistance improves the reliability and lifetime of these contact systems.

ARGUNA® 3430 is ideally suited for rack and barrel applications. 

Electrolyte characteristics

Electrolyte type

cyanide-free, alkaline

Metal content

20 (18 - 30) g/l

pH value

10.4 (10.2 - 10.6)

Operating temperature

30 (25 - 45) °C

Current density range

0.5 - 1.5 A/dm²

Plating speed

1 μm in 1.5 min at 1.0 A/dm²

Coating characteristics


Hard silver


>97 wt.% Ag

Colour of deposit


Hardness of deposit

170 - 190 HV (after deposition), approx. 150 HV (after aging)

Max. coating thickness

Up to 10 μm bright depositions, Thicknesses > 10 μm semi-matt

Density of the coating

ca. 10.5 g/cm³


  • Cyanide-free, significantly reduced exposure to hazardous substances
  • Excellent wear resistance of the coatings
  • Excellent thermal resistance
  • Improved reliability of contact systems
  • Ideal for rack and barrel operation


  • E-Mobility / Automotive
  • Charging connectors
  • High Power Contacts


  • Produktblatt_ARGUNA_3430_EN.pdf

Your contact person

Markus Legeler

Markus Legeler

Manager Sales International
T: +49 7171 607 204
F: +49 7171 607 316

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Umicore RISE Strategy 2030