First, the main purposes: Three German brand stainless steel special passivation pre-film is a new generation of green, non-toxic formulation, an alternative to traditional sodium nitrite passivation antirust treatment process, the passivation film is used for pre-treatment of various types of pickled , mainly for the passivation pre-film deal with various metal heat exchanger steel, stainless steel, copper, aluminum, titanium, etc., and all kinds of petroleum, chemical equipment, central air-conditioning system, thermal power plants and other steam turbine condenser. Second, the salient features: The product from INHIBITORS, coalescent compound formed of powder preparation, passivation, pre-film is done, it has to use less, transportation, handling, ease of use. Third, the physical and chemical indicators: Status: white powdery solid; pH (1% solution): alkaline; Effective content:> 98%; Flammability: flammable non-explosive, corrosive: slight corrosion The use of methods: 1, central air conditioning, circulating water system (mainly used to disable system before use to prevent corrosion during system deactivation): In the bottom of the cooling tower passivation pre-film powder into the circulating water, the preparation of an aqueous solution of about 3% after blunt After 12-24 hours of pre-film emissions can be; 2, petroleum, chemical equipment: pickled in the pickling bath circulating add passivation pre-film powder, formulated as a 3-8% solution in water at room temperature after the pre-passivation film 12 24 hours or heated to about 60 degrees passivation film 6-8 hours after the pre-discharge can. V. Note: 1, this product is not for human consumption; 2, handling, operation Wear protective clothing. Sixth, Packing: plastic bag: 1 kg / bag, 25 kg / bag.