AURUNA® 570 is an alkaline-cyanide alloy electrolyte for depositing green-yellow gold coatings. The gold-silver alloy has a fineness of approx. 18 carats....
Current density range
Alkaline-cyanide gold alloy electrolyte – gold-saving
AURUNA® 570 is an alkaline-cyanide alloy electrolyte for depositing green-yellow gold coatings. The gold-silver alloy has a fineness of approx. 18 carats. The coatings are gold-saving, they are bright even as thick layers. For thin layers, a variant with a low gold content is available (AURUNA® 570 LC).
The long-term stable AURUNA® 570 electrolyte is easy to operate and suitable for rack and barrel. It is used for decorative applications.
Electrolyte characteristics
| Electrolyte type | Alkaline-cyanide |
| Metal content | 8 (7.5 - 8.5) g/l Au 3 (2.5 - 3.5) g/l Ag |
| pH value | > 11 |
| Operating temperature | 35 (30 - 40) °C |
| Current density range | 1.0 (0.2 - 1.8) A/dm² |
| Plating speed | Approx. 0.6 μm/min at 1.0 A/dm² |
| Anode material | Stainless steel |
Coating characteristics
| Coating | Gold-silver |
| Alloy composition | 75 wt. % Au 25 wt. % Ag |
| Colour of deposit | Green-yellow |
| Brightness | Bright |
| Hardness | 115 HV |
| Max. coating thickness | > 10 μm |
| Density of the coating | Approx. 15.5 g/cm³ |
Advantages
- Gold-saving 18 carat layers
- Alkaline-cyanide gold alloy electrolyte
- Free of cadmium
- For decorative applications
- Bright even as thick layers
- Easy bath maintenance
- The coatings are RoHS compliant
- Suitable for rack and barrel
Applications
- Jewellery
- Watches
- Spectacle frames
- Writing implements
- Lighting
- Household articles
- Cutlery
- Accessories
