Excellent Layer Thickness Distribution
AURUNA® 526 is a weakly acidic gold-cobalt electrolyte with very good throwing power and layer thickness distribution, especially on hollow parts.
This makes the electrolyte perfect for use of bulk material in barrel and vibration coating facilities. The interiors of cases or sockets often need to be gold-plated. The excellent throwing power therefore very positively influences the layer thickness distribution between the interior and exterior surfaces. This optimum distribution means gold can be saved.
The deposited layers have very good wear resistance, low contact resistance and impressive corrosion resistance.
Electrolytes Characteristics
| Electrolyte type | Weakly acid |
| Metal content | 4 g/l (2 - 5 g/l) |
| pH value | 4.4 (4.0 - 4.6) |
| Operating temperature | Room temperature (20 °C up to max. 30 °C) |
| Current density range | 0.3 A/dm2 (0.3 - 1 A/dm²) barrel |
| Plating speed | approx. 50 mg (Amin) |
| Anode material | approx. 0.08 μm/min |
Coating Characteristics
| Coating | Gold-cobalt (approx. 0.2 wt.% Co) |
| Hardness | approx. 160 HV 0.01 |
| Abrasion resistance | Very good |
| Contact resistance | approx. 2 mΩ |
| Classification | Type 1, Code C (equivalent to Type 1, Grade C in accordance with MIL-G-45204 C) |
Advantages
- Save gold due to optimal coverage of hollow parts
- Excellent throwing power
- Long-term stability in permanent operation
- Layers are classified in accordance with ASTM B-488-01: Type 1, Code C
Applications
- Bulk and barrel parts
- Pin, spring and plug contacts
- Contact sockets
