Makeup Method (based on 1 Liter)
Pure water 700ml
Sodium cyanide 45g
Copper cyanide 18g
626 nickel free white and bright nickel substitute replenishing fluid 60ml
Nickel free white bright nickel substitute tin salt 30g
626 makeup special salt 25g
After fully dissolved, put pure water to working level for activated carbon treatment till limpidity, then add nickel-free white and bright nickel substitute makeup agent 626 about 40 m/l, before trial plating.
Operation Condition Best
Barrel plating Range
Metal copper 10g/L 6-18g/L
Metal tin 10g/L 12-20g/L
Free sodium cyanide 30g/L 25-35g/L
Potassium hydroxide 13g/L 7-15g/L
PH 12 11-14
Temperature 35 30-40
Cathode current density 1.5 A/dm2 0.25-3A/dm2
Anode current density 1 A/dm2 0.25-2A/dm2
Anode Stainless steel or tin plate plus bronze plate
Agitate mechanical swing and circulating filter
Rate 25mg/A. min
0.5mm/2min.(1A/dm2)
Facility Plating bath: PP, PE temperature-resistant material
Heating: stainless steel electro thermal pen plus constant temperature control.
Power source: 12VDC power stabilizer
Cooling: forced circulating cooling by cold water for barrel plating
Technical documents
Plating layer
Composition: copper 40%, Tin 55%, Zinc 5%
Density: 8.5g/cm3, 85mg/dm2=1mm
Hardness: 500-650Vickers
Features: bright and low porosity rate coat layer, wearable and corrosion resistant capability
1. Adding 1 g/kg copper cyanide will improve copper content by 0.7 g/L
2. Adding 2.8 g/kg nickel-free white and bright nickel substitute tin salt will improve tin content by 1g/L.