RHODUNA® Diamond Bright deposits brilliant-white, ultra-bright coatings of previously unattained lightness and brilliance. It is additionally characterized...
Brilliant-white and ultra-bright rhodium coatings
RHODUNA® Diamond Bright deposits brilliant-white, ultra-bright coatings of previously unattained lightness and brilliance. It is additionally characterized by high covering speed and excellent throwing power. Furthermore the RHODUNA® Diamond Bright layer thicknesses of up to 5 μm can be deposited crack-free.
Rhodium can be directly deposited on silver, gold, copper and copper alloys, nickel and nickel alloys. The layers are extremly low-porous and therefore very corrosion resistant.
Electrolytes Characteristics
| Electrolyte type | Strongly acidic |
| Metal content | 2 (1.6 - 3.0) g/l Rh |
| pH value | < 1 |
| Operating temperature | 40 (RT - 65) °C |
| Current density range | 1 - 2 (0.5 - 10) A/dm² |
| Plating speed | 0.08 μm/min at 1 A/dm² 0.10 μm/min at 2 A/dm² |
| Anode material | Pt-Ti (type PLATINODE® Pt/Ti) or MMO (type PLATINODE® 187) |
Coating Characteristics
| Coating | Rhodium |
| Purity | 99.99 wt. % Rh |
| Colour of deposit | Brilliant-white |
| Brightness | Ultra-bright |
| Hardness | Approx. 800 - 900 HV |
| Max. coating thickness | Approx. 3 - 5 μm |
| Density of the coating | Approx. 12.4 g/cm³ |
Advantages
- Ultra-bright coatings with previously unattained lightness and brilliance
- Good covering speed
- Minor porosity
- Excellent throwing power
- Layer thicknesses of up to 5 μm can be deposited
- For rack and barrel plating
- High abrasion resistance
Applications
- Jewellery
- Watches
- Spectacle frames
- Writing implements
- Technical applications (reed contact)
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