Aluminum whitening agent LQ-A434
LQ-A434 aluminum alloy environmental protection whitening agent manuale
LQ-A434 aluminum alloy environmental protection whitening agent is specially designed for aluminum alloy surface ash and scale removal, the solution does not contain nitric acid, phosphoric acid and hydrofluoric acid, no nitrogen oxide and hydrogen fluoride gas release when used, waste water no phosphorus discharge, conducive to environmental protection. Especially suitable for aluminum alloy with high silicon content (such as A356,ADC12, etc.).
Second, the use of parameters
Construction bath ratio: the use of raw liquid
Pull white spot: > 12 Pt
Temperature: 15-25 ° C
Processing time: 2-3 min
Pull white spot detection method Pull white spots:
Use 2mL pipepipe to absorb 2mL of white drawing agent
tank and place it in 250mL conical bottle, add 25mL pure water to rinse
the inner wall of the bottle, add 20mL 20% sulfuric acid solution, titrate
with 0.1mol/L potassium permanganate standard solution, the color changes
from colorless to pink, 20s will not fade as the end point of titration,
At this time, the volume of 0.1mol/L potassium permanganate standard
solution consumed by reading is the concentration of white point.
Supplementary method:
Pull white point < 12 Pt, should supplement gara white additive B and supplement Gara white additive A;
The dosage ratio of agent A and agent B should be added by 5:1.
Five, tank maintenance
1, the solution temperature is controlled at 15-25 ℃ , the
temperature is too high, the agent consumption is accelerated, and
the workpiece is easy to oxidize and become black.
2, the washing tank after the white should be maintained overflow,
the washing time should not exceed 20s, the acidity is too high, the
washing time is too long to affect the white effect, the washing tank
is best connected to the gas pipe to increase the stirring cleaning
effect.
3. After the workpiece is treated with white pulling agent, the
residence time in the air should not exceed 25s should be washed
immediately, and the longer the residence time, the workpiece is easy
to oxidize and become black.
Replacement cycle
This product is an acidic liquid, avoid skin and eye contact as much
as possible, and should be used in good ventilation conditions, and usersshould wear rubber gloves, waterproof boots, goggles and other labor protection products during operation, if accidentally touch the skin or eyes, rinse with plenty of water, if any discomfort, please send to the doctor for treatment.
