umicore Electroplating Gold Alloy Electrolyte Free of Nickel and Cobalt AURUNA® 215 is a colour gold alloy electrolyte for decorative applications, preferably for parts coming into contact with the skin such as jewellery and watches. The essential advantage of the coatings is their freedom from nickel and cobalt, excluding skin allergies caused by these metals. The weakly acidic gold electrolyte is easy to operate and suitable for rack and barrel, it works very colour-constant. Across a wide operating range, the coating colour (1N - 2N) is independent of pH-value and current density. By adding indium, a uniform colour is achieved. Applications • Jewellery • Watches • Spectacle frames • Writing implements • Accessories Advantages • Weakly acidic colour gold electrolyte • Pale to light yellow coatings • Colour-constant across a wide operating range • Uniform colour • For decorative applications • Non-allergenic since free of nickel and cobalt • The coatings are RoHS compliant • Suitable for rack and barre

GOLD IRON INDIUM ELECTROLYTE TECHNICAL SPECIFICATIONS Electrolyte characteristics Coating characteristics Electrolyte type Metal content pH value Operating temperature Current density range Plating speed Anode material Coating Alloy composition Colour of deposit Brightness Hardness of deposit HV 0.015 (Vickers) approx. values Max. coating thickness Density of the coating Gold-iron-indium 98.5 weight % Au 1.4 weight % Fe 0.05 weight % In Approx. 1N - 2N Bright 220 HV Umicore Galvanotechnik GmbH Klarenbergstrasse 53-79 73525 Schwaebisch Gmuend (Germany) Technical Support: Phone +49 7171 607-305...