Galvanized silicate color passivation solution prepared

The present invention provides a cleaning preparation galvanized silicate type color passivating liquid preparation according to the following formulation: sodium 3 ~ 10g / L, boric acid 1 ~ 3g / L, H2O2 (30%) 20 ~ 30mL /L,HNO3(65%)3~5mL/L,H2SO4(98%)3~5mL/L,KMnO40.1~0.5g/L,NaAc1~3g/L, the remainder being H2O, by dissolving, mixing, pH value adjusted to 0.5 to 1.0 to give a silicate color passivation solution. The passivation solution with zinc plated surface material can form a uniform, dense color passivation film, the corrosion resistance can also be significantly improved, by neutral salt spray test, the time up to the white rust 80 to 120 hours, the passivation solution used raw materials are free of hexavalent chromium, trivalent chromium and any other heavy metal ions harmful to humans and the environment of Ag, Cu, Pb, Ni, etc., additional production cost is low, the passivation efficiency high, a process for preparing a passivation solution to pollution.