Rhodium creates a brilliant white surface on decorative products. Platinum has enjoyed an incredibly stable price for a number of years, and its name...
PT PEN: Pen variant for targeted, partial rhodium plating
Rhodium creates a brilliant white surface on decorative products. Platinum has enjoyed an incredibly stable price for a number of years, and its name is desirable for all buyer groups. Imagine an alloy that combines the benefits of both precious metals.
With RHODUNA® PT PEN, targeted, partial rhodium plating is possible with a pen plating unit. This is mainly required for multicolor coatings, repair work and coatings of small areas. The layer consists of 40% rhodium and 60% platinum. Notwithstanding that the high-quality alloy can not be distinguished from that of a pure rhodium electrolyte, even with a trained eye. Due to the high societal significance of platinum, your product also gains in psychological value and its price acceptance increases significantly – conversely, for you as a producer a coating with RHODUNA® PT PEN is up to 43% cheaper than with a pure rhodium electrolyte.
Furthermore, RHODUNA® PT PEN not only convinces with cost advantages, but also impresses with high wear resistance and easy handling.
Electrolytes Characteristics
| Electrolyte type | Strongly acidic |
| Metal content | 0.8 g / 100 ml Rh, 1.2 g / 100 ml Pt |
| pH value | < 1 |
| Operating temperature | 25 °C |
| Plating speed | approx. 0.1 μm/min |
Coating Characteristics
| Coating | Rhodium-Platinum |
| Purity | 40 % Rh, 60 % Pt |
| Colour of deposit | White |
| Brightness | Brilliant |
| Hardness of deposit | approx. 600 HV |
| Max. coating thickness | up to 0.25 μm |
| Density of the coating | approx. 18.7 g/cm³ |
Advantages
- White and bright rhodium-platinum coatings
- Uniform layer thickness
- Crack-free up to 0,25 μm
- Wide current density range
- Abrasion-resistant
- Easy maintenance
- Less expensive than pure rhodium layers
- Minor porosity and good throwing power
- Good covering
Applications
- Jewellery
- Watches
- Spectacle frames
- Writing implements
- Fittings