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From the new gold-copper electrolyte AURUNA^® 500, hard, abrasion-resistant 18 carat red gold layers up to 20 µm can be deposited. They resist tarnishing and corrosion. The coatings with a hardness of up to 400 HV are primarily used for decorative but also for technical applications. AURUNA^® 500 is completely free from cadmium and has a stable pH-value of approx. 7.2. For electronic components, the layers are RoHS compliant. The users obtain an electrolyte which optimally meets the requirements of a stable, environmentally friendly and precious metal-saving process.

Description of the photograph:
Noble jewellery of the make F. Stahl - pendant coated with Black Ruthenium 479 and AURUNA^® 500 - manufactured by Friedrich Stahl GmbH & Co. KG, Birkenfeld.

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