RHODIUM-RUTHENIUM-ELECTROLYTE
Attractive, appealing and elegant. This ia 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.
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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ELECTROLYTE CHARACTERISTICS |
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COATING CHARACTERISTICS |
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Electrolyte type |
Acidic |
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Coating |
Rhodium-Ruthenium |
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Metal content |
1.0 (0.8 - 1.2) g/l Rh |
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Alloy composition |
50 % Rh |
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Operating temperature |
45 (40 - 50) °C |
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Colour of deposit |
Anthracite |
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Current density range |
2.0 (0.5 - 5.0) A/dm² |
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Colour of deposit |
Bright |
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Plating speed |
Approx. 0.04 μm/min |
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Max. coating thickness |
0.5 μm |
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Coating density |
Approx. 12.4 g/cm³ |
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Hardness of deposit |
600 - 900 HV |
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