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Black Rhodium Electrolyte – Ready-to-Use Black Rhodium Plating Solution (2.0 g/L Rh)

Product information "Black Rhodium Electrolyte – Ready-to-Use Black Rhodium Plating Solution (2.0 g/L Rh)"

Black Rhodium Electrolyte – Ready-to-Use Black Rhodium Plating Solution (2.0 g/L Rh)

Professional Black Rhodium Electrolyte for Elegant Anthracite-Grey Decorative Rhodium Coatings

The Black Rhodium Electrolyte is a premium, ready-to-use black rhodium plating solution developed for depositing elegant dark anthracite-grey rhodium coatings. The deposited coatings are characterized by their uniform color, excellent color consistency, high wear resistance, and premium decorative appearance.

Designed specifically for decorative electroplating applications, this electrolyte is ideal for finishing jewelry, watches, eyewear frames, luxury accessories, and high-quality metal components. Its simple bath maintenance and user-friendly operation make it an excellent choice for professional electroplating. Since the electrolyte operates efficiently at room temperature, no additional heating is required, reducing both energy consumption and processing time.

With a rhodium content of 2.0 g/L Rh, the electrolyte produces premium black rhodium coatings with a maximum thickness of 0.5 µm.


Applications

The Black Rhodium Electrolyte is ideal for:

  • Jewelry

  • Rings

  • Necklaces

  • Pendants

  • Bracelets

  • Earrings

  • Watches and watch components

  • Eyewear frames

  • Luxury accessories

  • Decorative metal finishing

  • Premium surface finishing

  • Designer metal components

Suitable for:

  • Jewelers

  • Goldsmiths

  • Jewelry manufacturers

  • Watchmakers

  • Eyewear manufacturers

  • Electroplating companies

  • Professional workshops


Product Benefits

  • Ready-to-use black rhodium plating solution

  • 2.0 g/L rhodium content

  • Elegant dark anthracite-grey finish

  • Uniform and color-consistent coatings

  • Excellent wear resistance

  • Easy bath maintenance

  • User-friendly operation

  • Operates at room temperature

  • No bath heating required

  • Ideal for decorative luxury finishes

  • Professional electroplating quality


Suitable Base Materials

The electrolyte is suitable for various metals and properly prepared electroplated surfaces, including:

  • Gold

  • White gold

  • Yellow gold

  • Rose gold

  • Silver

  • Palladium

  • Platinum

  • Nickel

  • Stainless steel

  • Suitable electroplated intermediate layers

For optimum adhesion and coating quality, all workpieces should be thoroughly cleaned, degreased, rinsed, and activated before black rhodium plating.


Technical Specifications

Product Type
Black Rhodium Electrolyte

Rhodium Content
2.0 g/L Rh

pH Value
< 1

Density
1.02–1.07 g/cm³


Recommended Operating Conditions

ParameterValue
Voltage2–3 Volts
Bath Temperature20–27 °C
Plating TimeApprox. 2 minutes (1–5 minutes)
Electrode MaterialGraphite or Platinum Electrodes
Anode/Cathode RatioApprox. 1:1
Current Density1.0–1.5 A/dm²
Workpiece AgitationRequired
Deposition RateApprox. 6–8 mg/A·min
Bath FiltrationRecommended for bath volumes above 10 liters

Coating Properties

The deposited black rhodium coating provides:

  • Elegant dark anthracite-grey finish

  • Uniform color distribution

  • Excellent color consistency

  • High wear resistance

  • Premium decorative appearance

  • Long-lasting durability

  • High-quality surface finish

Deposit Characteristics

  • Hardness: 300–370 HV

  • Maximum Coating Thickness: Up to 0.5 µm

  • Density: Approx. 10.5 g/cm³


Processing Recommendations

For optimum plating results, all components should be thoroughly cleaned, degreased, rinsed, and activated before electroplating. Following the recommended operating parameters ensures consistent coating thickness, uniform color, and excellent surface quality.

Changes in voltage, bath temperature, or plating time may influence the final color shade, coating thickness, and deposit quality.


Available Version

  • Ready-to-Use Black Rhodium Electrolyte – 2.0 g/L Rh


Quality from Betzmann Galvanik

Betzmann Galvanik develops premium precious metal electrolytes for professional electroplating applications in jewelry manufacturing, watchmaking, eyewear production, luxury goods, and industrial surface finishing.

Our black rhodium plating solutions are manufactured to the highest quality standards, ensuring excellent process stability, consistent plating performance, and elegant anthracite-grey rhodium coatings with outstanding durability and color consistency for professional users worldwide.

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Hazard statements

H314 Causes severe skin burns and eye damage.

H290 May be corrosive to metals. 

Precautionary statements 

P234 Keep only in original container.

P260 Do not breathe dust/fumes/gas/mist/vapors/spray. 

P280 Wear protective gloves/protective clothing/eye protection/face protection. 

P301+P330+P331 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.

P303+P361+P353 IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower. 

P363 Wash contaminated clothing before reuse.

P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing.

P310 Immediately call a POISON CENTER/doctor/…/. 

P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. 

P310 Immediately call a POISON CENTER/doctor/…/. 

P390 Absorb spilled quantities to prevent material damage. 

P405 Store locked up. 

P406 Store in a corrosion-resistant container with a corrosion-resistant inner lining.

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