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Chemical properties: acidic, yellowish liquid, slightly corrosive.
Process parameters
Work index parameters:
Brightening agent: 1-3%
Temperature: room temperature
Processing time: 1-3min
Parameters of preparation tank: AC polish 1-3%
Residual amount: tap water
Tank liquid management:
According to the process parameter index control and supplementation, it is required to be adjusted at least twice per production shift according to the inspection results in order to ensure the effect of degreasing and polishing.
The processing time of the new tank solution can be shortened accordingly. If the tank solution has been used for a long time or the processing volume is large, the bottom solution can be discharged and adjusted again to achieve the above process parameters.
Process flow and time-consuming index
Process flow: degreasing - washing - (acid etching - washing) - alkaline etching - washing - polishing treatment - washing - washing - oxidation
Consumption index
Consumption index is based on the thickness or thinness of the aluminum parts and the chemical composition of the material, in general, the average wall thickness of aluminum in more than 1mm, (i.e., per ton of aluminum outside the area of 400 square meters when the consumption of 6-8kg).
Analyzing method:
Degreasing agent determination:
Take 10.0ml of the working tank liquid, put it into 250ml conical flask, add about 50ml of water and add 2-3 drops of 1% phenolphthalein indicator, titrate with 1.0N sodium hydroxide standard solution until pink as the end point, and note down the number of consumed sodium hydroxide volume (ml).
Calculation: luminol (%) = 1.17N-Naoh v-NaOH
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