Anodic oxidation and sealing hole washing-free hole sealing technology
A technology of anodic oxidation and process technology, which is applied in the field of sealing technology without water washing between anodic oxidation and sealing, which can solve the problems of loss of sealing function and other problems, achieve shortening of working length, shortening of sealing process time, and reduction of process cost Effect
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[0014] Sealing solution formula and formula principle
[0015] The liquid formula for the water-free sealing process between anodic oxidation and sealing of aluminum workpieces is divided into two parts: the basic sealing liquid formula and the sealing supplementary liquid formula.
[0016] 1. Process formula
[0017] A. Basic sealing fluid formula
[0018] Sodium dihydrogen phosphate NaH 2 PO 4 2H 2 O 50g / l
[0019] Aluminum Sulfate Al 2 (SO 4 ) 3 18H 2 O 1g / l
[0020] Potassium fluoride KF·2H 2 O 0.8g / l
[0021] After dosing, the naturally formed PH value of the solution is about 6, and the medicinal solution is slightly turbid. At this time, it is necessary to use 3 to 4N sulfuric acid H 2 SO 4 After lowering the pH value of the solution to 2, the medicinal solution will become very clear. Then use 6-8N sodium hydroxide NaOH solution to raise the pH value of the liquid to 4 o'clock, so that the liquid has reproduced a slight mixed corrosion. When this situat...
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