For brilliant coatings
The silver electrolyte ARGUNA® 635 is used for the deposition of bright silver coatings for technical and decorative applications. Despite a low alloy content, a high hardness of up to 150 HV is possible and the coatings can be classified according to ASTMB700 type 2.
Compared to fine silver, the electrolyte impresses with improved abrasion behavior and increased vibration resistance. Depending on the working parameters, the electrolyte is suitable for continuous, rack and barrel processing. It can also be used to deposit thick coatings with a glossy finish.
The coatings have very good electrical properties and a permanently high coating hardness.
Electrolyte characteristics
Electrolyte type Alkaline-cyanide
Metal content 40 g/l Ag, 50 g/l KCN
pH value >13
Operating temperature 20 - 25 °C
Current density range: Rack operation 0.5 - 5 A/dm²
Current density range: Barrel operation 0.5 - 2 A/dm²
Plating speed 1 μm in 1.5 min at 1 A/dm²
Coating characteristics
Coating Hard silver
Alloy composition approx. 99 wt.% Ag
Colour of deposit white
Brightness Bright, brilliant
Hardness of deposit Directly after plating: approx. 170 - 190 HV, After heat treatment: approx. 130 - 150 HV
Max. coating thickness > 50 μm
Density of the coating 10.5 g/cm³
Advantages
Very good electrical properties
Permanent high hardness
Improved abrasion behavior
Suitable for rack and barrel products
Applications
Connectors
Electrical contacts
Stressed silver surfaces
