AURUNA® 313 Gold Iron Electrolyte

Cobalt-free alternative to direct gold plating of stainless steel

The highly effective, strongly acidic gold electrolyte AURUNA® 313 enables direct gold plating of stainless steels with good adhesion. It is particularly suitable for chromium-nickel steels, molybdenum- containing steels and nickel-based alloys that are difficult to activate. Thanks to its activating effect, AURUNA® 313 can also be used successfully for other passive materials that are difficult to electroplate. If necessary, activation can be supported by special pre-treatment measures.

Base metal intermediate layers and a reduction in corrosion resistance are avoided. The electrolyte is free of chloride or fluoride and is suitable for both decorative and technical applications. It has a large operating range and is suitable for rack, barrel and reel-to-reel applications.

The coatings made of AURUNA® 313 are crack-free, ductile and non-porous. They can be deposited brightly up to a coating thickness of 0.5 μm. The deposition speed is sufficient to economically deposit the desired coating thickness directly from the electrolyte in many cases. The coatings retain their bright appearance.

Advantages

• Good activation effect - without halides
• Adhesive direct gold plating of stainless steel
• Coatings are crack-free, ductile and low-porous
• Corrosion-resistant
• Large operating range
• For decorative and technical applications
• Suitable for rack, barrel and reel-to-reel equipment

Applications

• Watches
• Household articles
• Writing instruments
• Spectacle frames
• Costume jewelry
• Cutlery
• Electrical contacts
• Stainless steel contacts
• Stainless steel springs