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HAIHUA LW-03 Sn Salt Electrolytic Coloring Additive
Product Introduction
LW-03 is a creamy-white to grey-brown powder for coloring to aluminum profile after anodizing with advantages of good comprehensive properties,solution stabilization, good homogenization and reproducibility. It is a solid powder so can be dissolved easily in water and keep stable performance. But this product must avoid light storage.
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

Sulphuric Acid Reagent

16 g/L
Deionized Water Balance
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

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 must 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.
Packaging and Storage:
Package: Carton (30kg/ carton), plastic woven bag (25kg/bag)
Storage: Suggested to store in a cool, dry and well ventilated place; away from fire and heat source.