Preferred Dongguan, Shenzhen magnesium alloy magnesium alloy chromium-free passivation agent coating agent

Product Description: SJ-303 magnesium alloy chromium-free coating agent | magnesium alloy chromium-free passivation agent I. Introduction SJ-303 magnesium alloy chromium-free coating agent is a research and development company to dipping or spraying environmentally friendly manner magnesium alloy chromium-free passivation agent, to form a uniform dense fine silver gray or golden yellow film in a short time, to provide the underlying paint process for electrophoresis coating and spray processing. Second, the operating standards: with 5-8% of the total acidity trough concentration (TA) 2-5pt temperature (Temp) 25-50 ℃ Time (Time) 3-5 in three, using the device: coating the outer wall of the groove should be 316L or 304L stainless steel material, 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) - → Table tune - → water (overflow) - → film - → water (overflow) - → water (overflow) - → pure water washing - → drying or electrophoresis other post-processing. Sixth, bath preparation (press 1 ton tank dollars): 1, eighty percent of water is added to the treatment tank; 2, joined SJ-303 magnesium alloy chromium-free coating agent 50-80 kg; 3, filled the balance of water, and stir well; 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, then 0.1N 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. Eight 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 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.