UMICORE / RHODUNA®
Umicore RHODUNA® Pt One
Brilliant white rhodium–platinum alloy electrolyte for small-scale baths.
Rhodium and Platinum
Product Description
RHODUNA® PT ONE was developed as an economical alternative to pure rhodium plating. The deposit contains 20% rhodium and 80% platinum. With a total metal content of 1 g/L, the electrolyte provides brilliant white finishes in small-scale rack-plating applications.
- 20% Rh and 80% Pt deposit alloy
- Crack-free coatings up to 0.3 µm
- Low porosity and good throwing power
Applications: Jewellery, watches, writing instruments, spectacle frames and bathroom fittings.
Technical Specifications
- Electrolyte type
- Strongly acidic
- Bath metal content
- 0.3 g/L Rh + 0.7 g/L Pt
- pH
- < 1
- Operating temperature
- 45 °C (40–50 °C)
- Current density
- 3 A/dm² (2–5 A/dm²)
- Deposition rate
- Approx. 0.05 µm/min at 3.5 A/dm²
- Deposit alloy
- 20% Rh + 80% Pt
- Colour and brightness
- White · bright
- Hardness
- Approx. 600 HV
- Crack-free coating thickness
- 0.3 µm maximum
- Deposit density
- Approx. 18.7 g/cm³
- Anode
- Pt/Ti or MMO 187SO
Source: Umicore · 10 April 2025. Working bath values may differ from the concentrate content in the bottle. Refer to the manufacturer’s latest technical data sheet for product selection and operating conditions.
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