Direct gold-plating of stainless steel and nickel
Featured Product from Umicore Metal Deposition Solutions
40 years of direct gold-plating of stainless steel and nickel with AURUNA® 311
"Modern direct gold-plating ... - ... a new process", was the headline of the renowned German technical magazine Galvanotechnik at the end of 1982. Rather unemotionally, when we look back today on the success story of our AURUNA® 311. The process, which was absolutely innovative at that time, was officially introduced to the market at the beginning of the following year (1983).
This makes the gold electrolyte, which has remained essentially unchanged since then, 40 years old. Nevertheless, it is still qualitatively the standard for permanent direct gold plating of stainless steel or nickel today.
Until the release of AURUNA® 311, direct gold plating of stainless steel was unthinkable or only possible with a previously deposited nickel layer. However, the non-precious nickel as a base material contributed to a reduction in corrosion resistance, especially if very thin and thus non-porous gold layers were intended as a finishing layer. Direct gold platings with AURUNA® 311 ensure significantly better corrosion behaviour.
Direct gold plating for decorative applications
The main field of application of electroplated gold on stainless steel is largely in the decorative sector. AURUNA® 311 is used, for example, for full and partial gold plating in the following areas of application:
- Household articles (tableware)
- Writing utensils
- Glasses
- Watches (bracelets and cases)
- Cutlery (cutters, scissors)
Direct gold plating of technical applications
AURUNA® 311 can also be used in special versions for functional applications. In particular, the usability in reel-to-reel systems should be mentioned here, which enables ductile, low-porosity and corrosion-protective coatings for e.g. the following applications:
- Electrical contacts
- Stainless steel contacts
- Stainless steel springs
- Medical equipment (injection cannulas, prostheses, implants)
Advice and technical service right from the start
Our AURUNA® 311 sounds interesting to you? Then let's talk about it. We offer you comprehensive advice in advance to clarify all relevant details. On this basis, you should be able to make an informed decision for or against our processes.
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Umicore Galvanotechnik GmbH
We are the global circular materials technology group, providing today's and tomorrow's solutions for a more sustainable tomorrow.
Together, we focus on three core sectors that tackle global megatrends: Catalysis, Energy and Surface Technologies and Recycling. In every part of our business, our experts combine cutting-edge innovation, application know-how and relentless ambition to create material-based solutions that contribute to sustainable living all over the world.
Umicore generates the majority of its revenue 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.
Whether you help continue our progression in the recycling of precious and valuable metals, the production of automotive catalysts, or the development of battery materials for electric vehicles; you’ll play a part in providing cleaner air and a sustainable world for future generations.
By joining us, you will continue our growth and push the boundaries of what’s possible. You will have the opportunity to share your expertise, contribute new ideas and stop at nothing to find new answers. As part of our Group, there really is no limit to the impact you could make.
