FF-7705 Methylsulfonic Acid Bright Tin Plating Process
The FF-7705 process offers excellent walking ability, superior welding performance for coatings, and produces a uniformly bright white finish. This high-stability solution is easy to maintain and suitable for both rack plating and barrel tin plating processes.
Key Features
- Excellent walking ability
- Superior welding performance of coatings
- Bright white finish with uniform appearance
- High stability and easy maintenance
- Suitable for rack plating and barrel tin plating processes
Applicable Equipment and Materials
- Equipment: Polyethylene, polypropylene, PVC
- Agitation: Rack plating with cathode movement (3-4 m/min); aeration agitation not applicable
- Anodes: Must use pure tin anodes (impure anodes adversely affect coating); PP anode bags required for anode baskets
- Circulation/Filtration: Requires system operating at 4-5 cycles per hour with filter mesh size less than 5-10 µm
- Rectifier: Must use rectifier with residual ripple below 5%
Process Specification Conditions
| Parameter |
Value |
| (CH3SO3)2Sn |
45-60 ml/L |
| CH3SO3H |
100-180 ml/L |
| FF-7705A |
40-50 ml/L |
| FF-7705B |
8-12 ml/L |
| Temperature |
Room temperature |
| Current density |
0.5-3.0 A/dm2 |
| Filtering |
Continuous |
| Cathode movement |
Required |