The silver layer of FF-7800 cyanide-free silver plating process is matte silver, with good stability of the plating solution and easy maintenance; high current efficiency, good dispersing and covering ability; cyanide-free formula greatly reduces the pollution of the environment; the plating layer has good weldability, good conductivity, and good resistance to discolouration; and it can be applied in the industries of electrical appliances, electronics, telecommunication equipments, and instrument and meter manufacturing.
Pretreatment → Water washing → Activation → Water washing → Pre Silver Plating → Silver Plating → Recovery → Water washing → Water washing → Anti colour change treatment → Pure water washing (Temperature 50℃) → Pure water washing → Drying
|
Item |
Standard |
Range |
|
Silver Nitrate |
2 g/L |
1~3 g/L |
|
FF-7800A |
350 ml/L |
250~350 ml/L |
|
Pure water |
Remainder |
Remainder |
|
Operation conditions |
Range |
|
Cathode current density |
0.05~0.1A/dm2 |
|
pH |
9~10.5 |
|
Temp |
20~30℃ |
|
Filter |
Continuous filtration |
|
Anode |
Silver plate |
|
Item |
Standard |
Range |
|
Silver Nitrate |
28 g/L |
25~30 g/L |
|
FF-7800M |
600 ml/L |
500~700 ml/L |
|
Pure water |
Remainder |
Remainder |
|
Operation conditions |
Standard |
Range |
|
Cathode current density |
0.5A/dm2 |
0.3~1.0A/dm2 |
|
Cathode/anode area ratio |
1 : 2 |
1 : 2~4 |
|
pH |
9.5 |
9~10.5 |
|
Temp |
38℃ |
35~45℃ |
|
Filter |
Continuous filtration |
Continuous filtration |
|
Stirring (cathode movement) |
3～4 m/min |
3～4 m/min |
