Rhodium Bath Rhoduna PT ONE

The rhodium concentrate is used for the decorative surface coating of e.g. jewellery, watches and spectacle frames. It produces a white, high-gloss, extremely abrasion-resistant deposit.

The rhodium bath is used in a conventional electroplating unit. The free acid content is 22 g/l for a new bath. It increases during the service life and with repeated regeneration. This reduces the deposition rate, but this can be compensated by extending the exposure time.

Technical data:
Rhodium content 0.3 g/l
Platinum content 0.7 g/l
Temperature 40 - 50°C (optimum 45°C)
Coating time 2 - 4 minutes
Voltage 2.5 volts (for Pt/Ti anodes)
Current density 3 A/dm2 (2 - 5 A/dm2)
Deposition 3.5 mg/Amin
pH < 1
Movement Electrolyte or product movement
Anodes Titanium, platinised
Tank material Glass, acid res. Plastic (PP, PVC, etc.)
Layer thickness approx. 0.3 µm
Hardness approx. 600 HV

Further information can be found in the EWG safety data sheets.

• Safety Data Sheet