RHODUNA®-Alloy Black 1 Rhodium-Ruthenium-Electrolyte

Bring the day the elegance of night

Attractive, appealing and elegant. This is as true for the night as well as for precious metals. Surface finishing with RHODUNA®-Alloy Black 1 allows you to transfer this elegance to your products - also at daytime.

The electrolyte deposits a dark precious metal alloy of rhodium and ruthenium with a noble anthracite hue - without color shift. The coatings produced are extremely resistant to abrasion and offer a price advantage of almost 50 percent (August 2019).

RHODUNA®-Alloy Black 1 finally makes your customers‘ desire for dark precious metal surfaces a reality.

Further information can be found in our brochure.

Electrolyte characteristics

Electrolyte type

acidic

Metal content

1.0 (0.8 - 1.2) g/l Rh
1.0 (0.8 - 1.2) g/l Ru

Operating temperature

45 (40 - 50) °C

Current density range

2.0 (0.5 - 5.0) A/dm²

Plating speed

Approx. 0.04 μm/min
at 2.0 A/dm²

Coating characteristics

Coating

Rhodium-Ruthenium

Alloy composition

50 % Rh
50 % Ru

Colour of deposit

Anthracite

Brightness

Bright

Hardness

600 - 900 HV

Max. coating thickness

0.5 μm

Density of the coating

Approx. 12.4 g/cm3

Advantages

  • Very dark anthracite with high color constancy
  • Adjustable degree of blackness
  • Gloss-preserving
  • Uniform layer thickness
  • Up to 0.5 μm crack-free
  • Extremely abrasion resistant
  • Large applicable current range
  • Simple bath management
  • Significantly cheaper than pure rhodium layers
  • Base for deep black layers (RHODUNA® 471 Black)

Applications

  • Accessories
  • Jewelry
  • Watches
  • Eyeglasses
  • Fittings
  • Automobile interior
  • Writing implements
  • Contacts

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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.