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Product Characteristics.
Strong buffering capacity of tank liquid, good resistance to impurity ions and interference;
●The components of the tank liquid are easy to control, the process parameters are wide, and there is little change in the sealing effect due to the change of fluctuating process parameters in the previous process;
Components are delicate, the selection of a more appropriate surface activator, to avoid the closure of the common drawbacks such as hanging gray;
Improve the surface gloss and hardness of the closed profile.
Characteristics:
Tank liquid buffer capacity, impurity ion resistance, good resistance to interference performance.
Tank liquid composition is easy to control, process parameters are wider, due to fluctuations in the previous process parameters caused by changes in the closed effect is not much change.
Composition is exquisite, the selection of more appropriate surfactant, to avoid the common closed hanging gray and other ills.
The surface gloss and hardness of the closed profiles are improved.
Process parameters:
Ni2+:1.0-1.3g/L F:0.3-0.4g/L
PH value: 5.5-6.6 (PH value of new tank is between 5.2-5.5)
Temperature: 25-30°C
Time: 10-15min (depending on the thickness of the oxide film 1μm about 1min)
New tank: special sealer 4-5g/L
Tank maintenance:
Chemical analysis can be used to determine the amount of additive, the general production of a ton of aluminum profiles with an oxide film of 10μm need to consume 1.0-1.2KG. Consider the proportion of consumption of nickel ions and fluoride ions in the preparation, and ammonium fluoride, ammonium hydrofluoric acid, can be used under special circumstances. Adjust the fluoride ion.PH value adjustment can be done with ammonia or glacial acetic acid.
Test method: Use IS03210 phosphorus a chromic acid erosion weight loss method to test, less than 30mg/d㎡ is qualified.
Analyzing method:
Measurement of nickel content.
Remove the tank solution 25.0ml, add 50ml of water, buffer solution (PH = 10) 10ml, a little purple ammonium urea acid indicator, with 0.05M EDTA standard solution until the end of the purple-red color, the number of volumes of EDTA standard solution consumed for V (ml).
Calculation: Nickel content (g / L) = × 1000
Note: N-EDTA equivalent concentration
Measure the fluorine content:
Pipette tank solution 25.0ml, add water TISAB (total ionic strength adjustment buffer solution) 25ml, in the acidimeter measured -mv value, and then by the standard curve graph to check the fluorine content.
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