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White Rhodium 2 G./L.

Product information "White Rhodium 2 G./L."

Rhodium Electrolyte BMG‑085.1 – White Rhodium

Bright, Hard and Corrosion‑Resistant Rhodium Plating Solution


Short Description

The Rhodium Electrolyte BMG‑085.1 is a ready‑to‑use electroplating solution for rhodium, designed to produce exceptionally bright, white, hard and durable rhodium deposits. It is formulated for long shelf life and can be used in both tank plating, brush plating and tampon/pen plating. This makes it ideal for decorative and functional coatings, particularly where permanent brilliance and corrosion resistance are required. 

The plated layer remains bright and does not tarnish like silver, making it a popular choice in jewelry, watches, accessories, and high‑wear surfaces. 

What is this Rhodium Electrolyte used for?

Rhodium electroplating provides a thin yet extremely durable white metal coating that offers:

  • Bright, brilliant white finish

  • High abrasion and wear resistance

  • Outstanding corrosion resistance

  • Surface protection for precious metals and alloys

  • Enhanced durability and appearance on jewelry, watches, eyeglass frames, and decorative items

It is frequently used as a top layer over gold, palladium or other base finishes for both decorative appeal and functional enhancement. 


How does rhodium plating work? (simple explanation)

Rhodium plating uses electrolytic deposition to transfer rhodium onto a prepared metal surface:

  1. The workpiece must be extremely clean, polished and degreased before plating.

  2. The cleaned part is connected as the cathode (negative pole).

  3. A platinum or platinum‑coated titanium anode is used as the positive pole.

  4. When DC current is applied, rhodium ions in the electrolyte are reduced and deposit as a bright, uniform rhodium layer.

Because rhodium is one of the hardest precious metals, even very thin layers provide excellent scratch, wear and tarnish resistance


Advantages of Rhodium Electrolyte BMG‑085.1

  • Produces a very bright white finish, brighter than silver

  • High hardness and wear resistance, excellent for high‑use surfaces

  • Excellent corrosion resistance and tarnish protection

  • Suitable for tank, brush and pen plating

  • Can be used on gold, palladium, silver and other base layers

  • Long‑lasting bath with extended shelf life (over 5 years)


Technical Parameters

The following values represent typical operating conditions for a rhodium plating solution with ~2 g Rhodium content per liter: 

PropertyTypical Value / Range
Electrolyte typeRhodium plating solution
Rhodium contentapprox. 2 g/L
pH value< 1 (strongly acidic)
Operating temperature20–35 °C (can also work up to ~40 °C)
Voltageapprox. 2–3 V
Current densityapprox. 0.5–2 A/dm²
Anode materialPlatinum‑coated titanium
Typical exposure time2–10 minutes
Deposit appearanceBright, brilliant white
Deposit hardnesshigh (≈ 800–900 HV)
Maximum thicknessup to ~1 µm (thin decorative layer)
Deposit densityapprox. 12.4 g/cm³

These parameters reflect typical conditions for rhodium plating baths producing high‑quality decorative coatings


Application Instructions (Detailed)

Surface Preparation:

  • Thoroughly polish, clean and degrease surfaces before plating.

  • Rinse with clean water and, if necessary, use a suitable acid dip or activator before rhodium plating.

Tank Plating:

  • Maintain plating voltage and current per recommended parameters.

  • Use proper agitation for best uniform coverage on complex shapes.

Brush / Pen Plating:

  • Keep the plating stylus moving evenly across the workpiece.

  • Ensure a good contact clamp connection for a consistent layer.

Tips:

  • Thin rhodium layers (< 1 µm) are typical and provide excellent finish and protection.

  • Mask areas not to be plated using appropriate masking methods.


Safety Information

Rhodium plating solutions are strongly acidic and corrosive and must be handled with care:

  • Wear chemical‑resistant gloves, eye protection and protective clothing.

  • Avoid contact with skin and eyes; rinse thoroughly with water if contact occurs.

  • Use only in well‑ventilated areas to avoid inhalation of fumes.

  • Do not ingest; keep out of reach of children.

  • Dispose of waste and rinse water according to local environmental regulations due to heavy metal content. 


Conclusion

The Rhodium Electrolyte BMG‑085.1 produces brilliant white, hard and corrosion‑resistant rhodium coatings, perfect for decorative and functional requirements in jewelry, watches and precision components.
With careful surface preparation and adherence to operating parameters, this solution delivers consistent, high‑quality rhodium layers suitable for both hobbyists and professional applications.

Aetzend-betzmann
Aetzend-betzmann

Hazard statements 

H314 Causes severe skin burns and eye damage.

H290 May be corrosive to metals. 

Safety instructions

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

P405 Store locked up. 

P501 Dispose of contents/container {1}.

HS Code 38249970

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