AURUNA® 5300 Gold Iron Electrolyte

AURUNA® 5300 Gold Iron Electrolyte

Nickel-free, fast-depositing weakly acidic electrolyte

AURUNA® 5300 is a hard gold electrolyte free of nickel and cobalt with high plating speed for decorative and technical applications. The weakly acidic electrolyte for depositing yellow, bright hard gold coatings exhibits good corrosion and abrasion resistance. Its contact resistance is low and long-term stable. Metallic contaminants can be easily precipitated.

The hard gold electrolyte can be used for rack and barrel operation. It is especially suitable for jewellery since the coatings are free of nickel and cobalt.

Electrolyte characteristics

Electrolyte type

Weakly acidic

Metal content

8 (2 - 12) g/l Au 50 mg/l Fe

pH value

4.2 (4.0 - 4.5)

Operating temperature

45 (43 - 47) °C

Current density range

2 - 3 (1 - 4) A/dm²

Plating speed

0.2 - 1.0 μm/min

Anode material

Pt-Ti, MMO (type PLATINODE® 147)

Coating characteristics



Alloy composition

99.7 wt.% Au 0.3 wt.% Fe

Colour of deposit





150 - 170 HV

Max. coating thickness

Crack-free up to 20 μm

Density of the coating

Approx. 17.5 g/cm³


  • Weakly acidic hard gold electrolyte
  • Non-allergenic since free of nickel and cobalt
  • High plating speed
  • Yellow, bright coatings with approx. 0.3 % iron
  • For decorative and technical applications
  • Low, stable contact resistance
  • Good corrosion and abrasion resistance
  • The coatings are RoHS compliant
  • Suitable for rack and barrel


  • Accessories
  • Jewellery
  • Writing implements
  • Bathroom fittings
  • Lighting
  • Connectors/contacts
  • Printed circuit boards


  • Produktblatt-auruna-5300-en-screen-20190514.pdf

Your contact person

Markus Legeler

Manager Sales International
T: +49 7171 607 204
F: +49 7171 607 316

Find a representative in your region


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