Sn Salt Electrolytic Coloring Additive
LW-03 Sn Salt Electrolytic Coloring Additive is a creamy-white to grey-brown powder for coloring to aluminum profile after anodizing. It has excellent comprehensive properties of stable bath solution, uniform coloring, good reproducibility, clear and full color. It is a solid powder of easy water-soluble and stable performance.
1. Bath Make-up:
Name | Quantity | Unit |
LW-03 | 20 | g/L |
Nickel Sulfate (NiSO4.6H2O) | 20 | g/L |
Stannous Sulfate (SnSO4) | 6-10 | g/L (light color:6g/L,dark color:10g/L ) |
Sulphuric Acid Reagent | 16 | g/L |
Deionized Water | Balance | |
2. Operating Conditions:
Name | Quantity | Unit |
Sulphuric Acid (H2SO4) | 16-25 | g/L |
Stannous Sulfate (SnSO4) | 6-15 | g/L |
Voltage | 16-19 | V |
Temperature | 18-25 | ℃ |
PH | 0.5-1.2 | |
Time | Depends on the depth of color | |
3. Solution Maintenance:
1) Analyze the concentration of free sulphuric acid, stannous sulfate, nickel sulfate and total acid daily. Maintain the concentration of free sulphuric acid above 16g/L and total acid around 40g/L. To increase the stannous sulfate by 1 kg, add 1.5 kg of LW-03.
2) The pure water is suggested be added slowly with stirring to prevent the hydrolysis of stannous sulfate and cause solution turbidity.
3) There will be white precipitates in long-term production. So the bath should be filtered and cleaned regularly.
4. Packaging and Storage:
Package: Carton (30kg/ carton,25kg/bag)
Storage: Suggested to store in a cool, dry and well ventilated place; away from fire and heat source , and avoid light storage.
