Pure platinum electrolyte without yellow tint
The strongly acidic PLATUNA® PT platinum electrolyte is used to deposit smooth, crack-free platinum coatings up to a layer thickness of 5 μm. The deposited layers are characterized by a brilliant luster and, in contrast to conventional platinum coatings, do not exhibit a yellow tint.
Furthermore, the electrolyte has a low sulfuric acid content and is therefore less aggressive to the coating substrate. The deposition rate is independent of the current density, which leads to an optimum layer thickness distribution. No precipitation occurs and the platinum concentrate does not have to be stored in the refrigerator.
Electrolyte characteristics
Electrolyte type Strongly acidic
Metal content 2 (1 - 6) g/l
pH value < 1
Operating temperature 60 (55 - 65) °C
Current density range 5 (0.5 - 10) A/dm²
Plating speed approx. 0.13 μm/min at 5 A/dm²
Deposition rate approx. 5.6 mg/Amin at 5 A/dm²
Coating characteristics
Coating Platinum
Purity 99.9 wt.% Pt
Colour of deposit White
Brightness Bright, brilliant
Hardness not measurable, approx. 350 HV
Max. coating thickness approx. 0.5 μm bei 2 g/l Pt content, up to 5 μm at 6 g/l Pt content
Density of the coating approx. 21,4 g/cm³
Advantages
Excellent brilliance without yellow tint
Up to 5 μm layer thickness
High abrasion resistance
Current density independent
Easy handling - no cold storage and no precipitation
Applications
Jewelry
Watches
Writing implements
Spectacles frames
Bathroom fittings
