Dongguan, Shenzhen, blackening agent

Product Description: I. Introduction SJ-207 is a black agent black phosphorus treatment used first black with a black agent, hydrochloric acid used in conjunction with the industry, the workpiece color black bright after using this process, together with me Division of phosphating solution screws were blocking treatment obtained dense black phosphate coating, was positively black with good rust resistance. Under normal conditions, protection period can reach more than three years. Second, the nature 1. State: Solid powder 2. PH: weakly acidic 3. Stability: Stable Third, work standard management projects operating standards blackening agent, a bath concentration of 1-3% hydrochloric acid bath concentration of industrial construction acidity 1-3% 25-50 degree temperature (Temp) normal time (Time) 2-5 minutes PH replacement cycle of 1-3 months 0.5-1 1. instrument reagent pipetting, suction ball, beakers, 0.1N NaOH, phenolphthalein (PP) 2. Detection Full acidity (TA): Take groove processing solution 10mL plus phenolphthalein (PP) instruction Agent 3-5 drops, and then 0.1N NaOH (sodium hydroxide) titration, the color orange to purple discoloration does not fade for 5-10 seconds, that its end, a few milliliters of when the consumption of 0.1N NaOH, namely its degree of acidity of the whole. Fourth, the added management solution in use for some time, as the active ingredient solution consumed while making ability. It will be suspended solids (white floc) and the solution becomes cloudy, indicating increased iron ions. If a large number of suspended solids appear, should stop using, will settle at the bottom of the vessel was allowed to stand after a certain time. Remove sediment, and then follow the blackening agent: hydrochloric acid = 1: 1 ratio to additional new solution that indexes returned before you continue. V. Notes: 1. Replace the phosphating Blackening metal tank containers are not available, it is best to use plastic or fiberglass containers. The active ingredient solution so as not to react with the container and accelerated aging solution. 2. The need to re-rust oil workpiece (metal cleaning agent) rust (pickling). Surface rust can play with hydrochloric acid activation can improve the efficiency and quality of black phosphate. Such as the presence of surface passivation layer will affect the black mass. 3. pickled workpiece to pay attention to water, preferably rinsed with running water. Washing does not completely prone black pieces color white, anti-rust and so on. The black tank between the workpiece should avoid tight layers, suitable stirring the solution helps to improve the quality of black. Sixth, security measures: operators should bring rubber gloves, if the liquid touches the skin or eyes, rinse immediately with plenty of water, if necessary hospital treatment.