| Electrolysis
Colorant Additive (II)
(Product No.: TQ-95)
TQ-95 is an improved product of TQ-92 series. The colored
aluminum material is vivid, and the grounding is somewhat
red (just like the grounding of mono-nickel salt pigmentation)
and not easily changed. It can be used as mono-nickel
salt colorant, and it has the same chemical characteristic,
operation principle and antioxidant ability as TQ-92.
1. Characteristic
TQ-95 serial colorant additives are a combination of
TQ-95A and TQ-95B, and they contain antioxidant, dispersant,
complexant, and so on, which prevent Tin (II) ion from
being oxidized, keep the solution clean, and reduce
the assumption of Tin (II) sulfate.
2. Technical Parameters and Operation Conditions:
Tin (II) sulfate : 8-12g/1
Nickel sulfate: 15-18g/1
TQ-95A:8-10g/1
TQ-95B:12-15g/1
Sulfuric acid (CP grade): 15-18g/1
Pure water (drinkable tap water)
Temperature: 18-220C
Voltage: 12-18V
3. Control of Trough Liquid:
The components should be replenished according to the
test data and production capacity. During normal production,
the components should be replenished once for each batch
of production. Under normal conditions, for one ton
of aluminum material (420-450m2/t) to be
colored, the assumption of materials is as follows:
Tin (II) sulfate: 2-3kg
Nickel sulfate: 1-1.2kg
TQ-95A:1-1.5kg
TQ-95B:2-3kg
As the colored depth is different, the assumption of
materials is different accordingly. The trough liquid
must be analyzed for each batch of production, and the
concentration of components must be adjusted according
to the analysis result.
4. Analysis Method:
SnSO4 analysis: Add 10ml of trough liquid
to a 250ml conical flask, and add 5ml of 1+1 HC1, and
add water up to 100ml, then drip several drops of 1%
starch solution, and then titrate the solution with
0.1N iodine standard solution till the end point (livid
purple). Record the consumption volume (A ml) of iodine
standard solution.
Calculation: SnSO4g/1=A×10.74/NI2
Free H2SO4 analysis and pH value
measurement of the trough liquid: Add 50ml of trough
liquid to a 100ml beaker, and measure the pH value with
pH meter, then stir the solution with magnetic stirrer
(take care not to collide with pH electrode), and then
titrate the solution carefully with 0.1N NaOH standard
solution until pH=2.1. Record the consumption volume
(ml) of NaOH standard solution.
Free H2SO4 g/1=0.98NNaOH
VNaOH
Analysis of nickel sulfate concentration: Add 10ml of
trough liquid to a 300ml conical flask, and add about
200ml of water, then add 4ml of 50% tartaric acid, 8ml
of 50% potassium fluoride, 6ml of 36% acetic acid and
4ml of 50% ammonium acetate, and then rock the conical
flask and make them mix evenly. Heat the solution to
80-90?, and add several drops of Cu-PAN as indicator,
and titrate the solution with 0.1M EDTA standard solution
till the end point (purple turns yellow). Record the
consumption volume (ml) of EDTA.
Nickel sulfate concentration NiSO4.6H2Og/1=26.27*MEDTA*VEDTA
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