For wearables and cell phones, sales arguments such as a long service life and compatibility with fast charging devices are becoming increasingly crucial. But gold-plated charging contacts...
Bright and white coatings for electrical contacts
For wearables and cell phones, sales arguments such as a long service life and compatibility with fast charging devices are becoming increasingly crucial. But gold-plated charging contacts and connectors cannot meet these expectations because they corrode through contact with salt water, sweat, etc. RHODUNA® Alloy (rhodium-ruthenium) has therefore been established for years. Due to the current high price, however, we are looking for alternatives.
PLATUNA® N1 is a pure platinum plating solution, which deposits white and bright coatings. The layers itself maintain good electrical properties, high abrasion resistance and excellent corrosion resistance. The hardness of the platinum coating is approx. 500 HV, and the purity reach up to 99.9 wt.%. A platinum layer also offers a huge cost advantage at current precious metal prices.
Electrolytes Characteristics
| Electrolyte type | Strongly acidic |
| Metal content | 4 (2 - 12) g/l Pt |
| pH value | < 1 |
| Operating temperature | 35 (30 - 60) °C |
| Current density range | 3 (2 - 20) A/dm² |
| Plating speed | up to 1 μm/min |
| Anode material | MMO 187 SO |
Coating Characteristics
| Coating | Pure platinum |
| Purity | 99.9 wt.% Pt |
| Colour of deposit | White |
| Brightness | Bright |
| Hardness | approx. 500 HV |
| Max. coating thickness | 2 μm |
| Density of the coating | approx. 21 g/cm³ |
Advantages
- Less expensive than Rhodium Alloy layers
- High protection against corrosion
- Bright, white and brilliant coatings
- Wide operating range
- The coatings are RoHS compliant
- For technical applications
- Crack free up to 2 μm
- Suitable for rack, barrel and reel-to-reel plating
Applications
- Smartwatches
- Headphones (In-Ears)
- Mobile phones
- Fitness tracker
- Plug contacts
- Pogo-Pins
