I. Features 1, TN-610 multicolored high concentration of trivalent passivation solution for any kind of galvanized and operation, a layer of iridescent galvanized layer passivation film formed on the surface, not hair spray. 2, heat resistance, corrosion resistance, high, regardless of hanging plating or roll plating neutral salt spray test 120 hours without white rust. 3, hexavalent chromium passivation solution, through the Swiss SGS testing standards, in line with the EU ROHS directive, hexavalent chromium can be measured by boiling. Second, the range of optimum process conditions TN-610 80-120ml / L 100ml / L PH value PH test strips 2.8 2,5-3.5 precision temperature 20-50 ° C 20-50 ° C 40-70 seconds to 50 seconds time stirring the air Stir or shake three parts, the process of galvanized (thickness: ≥ 8 micron) → washing → two light (nitric acid: 1%) → two washing → TN-610 two passivation → washing → drying (70-100 ℃) Fourth, the preparation and maintenance of a passivation solution, want to join in the passivation tank with a volume of pure water is added 9 2/3 TN-610 passivation solution, add water to the required volume, stir, PH detection passivation solution can be put into the town (using nitric acid or 10% sodium hydroxide to adjust the PH value of the diluted solution), is heated to operating temperature after 2, during the passivation operation in the PH value passivation solution will gradually rise, the need to add dilution nitrate or TN-610 passivation solution (based on the concentration of added analysis) to reduce the PH value. 3, bath supplemented by timing TN-610 to maintain, add the amount of: rack: 1 ~ 2L / 100m2 Barrel: 2 ~ 4L / 100m2 due to different working shape, with a different amount recommended by the analysis added. 4, update or reconfiguration. Passivation solution of zinc ions, iron ions and other impurities will affect the appearance of passive components or corrosion, the proposed control range: zinc ions of less than 15.0 g / liter, iron control at 200ppm or less. 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