RUTHUNA® 479 Black Ruthenium Electrolyte

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For black decorative coatings - ideal as a perfect final finish

RUTHUNA® 479 Black is the perfect final finish for dark to black surfaces for decorative applications. The black ruthenium electrolyte is strongly acidic and has a long lifetime. It is easy to operate and primarily used for rack plating.

Depending on the degree of blackening, the abrasion resistance of the layers is good to very good. Applying a strike gold layer as an undercoat is strongly recommended. If palladium-nickel or palladium are used as undercoats, strike gold plating will partly not be necessary.

RUTHUNA® 479 Black is suitable for many decorative applications, for instance in the jewellery, bathroom fittings, spectacle frame and writing utensils industries.

Electrolyte characteristics

Electrolyte type

Strongly acidic

Metal content

5 (2 - 10) g/l Ru

pH value

1.2 (0.8 - 1.3)

Operating temperature

65 (60 - 70) °C

Current density range

1.5 A/dm²

Plating speed

0.12 μm/min

Anode material

Pt/Ti or MMO (type PLATINODE® 177)

Coating characteristics

Coating

Black ruthenium

Purity

99.9 wt.% Ru

Colour of deposit

Grey to anthracite (black)

Brightness

Bright


Advantages

  • For perfect decorative dark to black final finishes
  • Degree of blackening adjustable
  • Good colour constancy
  • Strongly acidic electrolyte with long lifetime
  • Simple bath maintenance
  • Good to very good abrasion resistance
  • Suitable for rack and barrel


Applications

  • Accessories
  • Bathroom fittings
  • Spectacle frames
  • Jewellery
  • Writing implements
  • Watches
  • Car interiors
  • Shop furnishings






Umicore is a global materials technology and recycling group, with about 10,000 employees and a turnover of € 10.4 billion in 2015. Umicore generates the majority of its revenues and dedicates most of its R&D efforts to clean technologies, such as emission control catalysts, materials for rechargeable batteries and recycling. Umicore’s overriding goal of sustainable value creation is based on an ambition to develop, produce and recycle materials in a way that fulfils its mission: materials for a better life.

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Umicore is a global materials technology and recycling group, with about 10,000 employees and a turnover of € 10.4 billion in 2015. Umicore generates the majority of its revenues and dedicates most of its R&D efforts to clean technologies, such as emission control catalysts, materials for rechargeable batteries and recycling. Umicore’s overriding goal of sustainable value creation is based on an ambition to develop, produce and recycle materials in a way that fulfils its mission: materials for a better life.