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...
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.
Electrolytes 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
