RHODUNA® Diamond Bright Rhodium Electrolyte

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.

Electrolyte 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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Questions about the product?

Markus Legeler

+49 7171 607 204

For inquiries and additional information
please contact

Umicore AG & Co. KG
Rodenbacher Chaussee 4
63457 Hanau-Wolfgang
Germany

Tel.: +49 (6181) 59 6005
Fax: +49 (6181) 59 2970
Email: chemistry@umicore.com
Website: www.chemistry.umicore.com

The information and statements contained herein are provided free of charge. They are believed to be accurate at the time of publication, but Umicore makes no warranty with respect thereto, including but not limited to any results to be obtained or the infringement of any proprietary rights. Use or application of such information or statements is at the user´s sole discretion, without any liability on the part of Umicore. Nothing herein shall be construed as a license or recommendation for use, which infringes upon any proprietary rights. All sales are subject to Umicore´s General Conditions of Sale and Delivery.