Preferred Dongguan, Shenzhen, zinc phosphating solution at room temperature

Product Description: SJ-306 at room temperature phosphating solution I. Introduction SJ-306 normal zinc phosphate coating solution is a phosphate solution, to form a very stable chemical properties of fine crystal gray phosphate in a short time film. Suitable for dipping or spraying construction, the phosphate solution widely used in automobiles, motorcycles, furniture and other metal coating, ED industries. Second, the operating criteria: management projects operating standards phosphate solution concentration of 5-7% a bath free acidity (FA) 1.3-2.5 Total acidity (TA) 18-30pt time (Time) 5-10 minutes accelerator (AC) 2- 4 pt temperature (Temp) normal update cycle 2-4 months Third, the use of equipment: film groove outer wall should be 316L or 304L stainless steel, thick-walled steel plate or PVC material (lining anti-corrosion lining) system. Fourth, the test drug control: Drugs: indicator: phenolphthalein, titration solution: 0.1mol / l NaOH solution. Instrument: 50ml basic burette, 10ml pipette and suction ears ball, 200ml beaker. V. Process: degreasing - → water (overflow washing) - → pickling - → and - → water (overflow) - → water (overflow) - → Table tune - → phosphate - → water (overflow) - → water (overflow) - → spray six, bath preparation (press 1 ton tank dollars): 1, eighty percent of water is added to the treatment tank; 2, joined SJ-306 zinc phosphate solution at room temperature 50 ~ 70kg ; 3, filled the balance of water, and stir well; 4, can be used in the testing was to use a range of total acidity; measurement methods: (1) Full acidity (TA): Take groove processing solution 10mL plus phenolphthalein ( PP) indicator 3-5 drops of 0.1N NaOH and then titrated to the color of pale pink by the free, 5-10 seconds does not fade, namely its end, a few milliliters of 0.1N NaOH consumed in this case, namely its degree of acidity of the whole. (2) free acid (FA): Take groove processing solution 10mL plus bromophenol blue (BPB) indicator 2-3 drops of 0.1N NaOH and then titrated color from light yellow to pale blue, not 5-10 seconds fade, namely its end, a few milliliters of when the consumption of 0.1N NaOH, namely its degree of acidity of the tour. (3) accelerator (AC): After taking the treatment liquid fermentation tube to 80% full, plus sulfanilic about 1-2 grams of powder left to ferment so that bottom of the tube immediately to restore the standing position, and then observed in the tube generate several milliliters of gas, is to promote the concentration of agents. Seven supplementary adjustment: use due to continuous consumption of liquid, it should be constantly replenished phosphate solution, to keep it within the desired pH range. Add about 20kg per ton concentrate, can enhance the free acidity of about one point, according to the coating thickness requirements to adjust to the best acidity. Nine, packaging, storage: 1, the product 25L plastic drums, to prevent leakage. 2, the phosphate solution storage ambient temperature must not below 0 ℃, storage temperature 0 ~ 40 ℃. In a closed environment and cold stored for at least 2-3 years. X. Note: the value of the slot timing measurements per day 4-6 times to ensure that the standard range. Operators should bring rubber gloves, if the liquid touches the skin or eyes, rinse immediately with plenty of water, if necessary hospital treatment.