AURUNA® 526 Barrel Gold-Plating Electrolyte

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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







Umicore is a global materials technology and recycling group, with about 10,000 employees and a turnover of € 10.4 billion in 2015. Umicore generates the majority of its revenues and dedicates most of its R&D efforts to clean technologies, such as emission control catalysts, materials for rechargeable batteries and recycling. Umicore’s overriding goal of sustainable value creation is based on an ambition to develop, produce and recycle materials in a way that fulfils its mission: materials for a better life.

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Umicore is a global materials technology and recycling group, with about 10,000 employees and a turnover of € 10.4 billion in 2015. Umicore generates the majority of its revenues and dedicates most of its R&D efforts to clean technologies, such as emission control catalysts, materials for rechargeable batteries and recycling. Umicore’s overriding goal of sustainable value creation is based on an ambition to develop, produce and recycle materials in a way that fulfils its mission: materials for a better life.