AURUNA® 526 Barrel Gold-Plating Electrolyte
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.

Electrolyte 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
For inquiries and additional information
please contact
Umicore AG & Co. KG
Rodenbacher Chaussee 4
63457 Hanau-Wolfgang
Germany
Tel.: +49 (6181) 59 6005
Fax: +49 (6181) 59 2970
Email: chemistry@umicore.com
Website: www.chemistry.umicore.com
The information and statements contained herein are provided free of charge. They are believed to be accurate at the time of publication, but Umicore makes no warranty with respect thereto, including but not limited to any results to be obtained or the infringement of any proprietary rights. Use or application of such information or statements is at the user´s sole discretion, without any liability on the part of Umicore. Nothing herein shall be construed as a license or recommendation for use, which infringes upon any proprietary rights. All sales are subject to Umicore´s General Conditions of Sale and Delivery.