Preferred Dongguan Shengjie SJ-500 green trivalent chromium aluminum coating agent

Product Description: SJ-500 trivalent chromium aluminum coating agent I. Introduction SJ-500 aluminum trivalent chromium coating agent is dipping or spraying manner suitable for die-cast aluminum, aluminum, zinc alloy coating agent, can short formed within dense homogeneous fine silver or gray-blue film, do a final treatment, the coating process can also provide low-level, but also for the electrophoretic coating. Second, the operating criteria: management projects operating standards with a concentration of 10-15% of the total acidity groove (TA) 2.5-5pt PH 3.8-4.8 times (Time) 1-3 minutes Temperature (Temp) at room temperature --40 ℃ update cycle 2-3 months Third, 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) - → water (overflow) - → film - → water (overflow) - → water (overflow) - → drying or after electrophoresis process. Sixth, bath preparation (press 1 ton tank dollars): 1, eighty percent of water is added to the treatment tank; 2, joined SJ-302 trivalent chromium aluminum coating agent 100 ~ 150kg; 3, filled the balance of water, and Stir; 4, can be used in the testing was to use a range of total acidity; seven measurements: total acidity (TA): Take groove processing solution 10mL plus phenolphthalein (PP) indicator 3-5 drops, and then 0.1 N NaOH titration, no mention to the color pink, 5-10 seconds does not fade, namely its end, a few milliliters of 0.1N NaOH consumed in this case, namely the degree of its total acidity. PH: Take a pH test paper immersion bath degreaser 3-5 seconds, remove and contrast than the color card, with a similar color value that is shown in its pH value is approximately eight supplementary adjustment: use due continue to consume liquid, it should be constantly replenished phosphate solution, to keep it within the desired pH range. Add about 20kg per ton concentrate, can increase the total acidity 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 film extinguisher ambient temperature 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.