Magnesium alloy high-corrosion-resistant passivating agent, and passivation technology thereof

The invention discloses a magnesium alloy high-corrosion-resistant passivating agent. The magnesium alloy high-corrosion-resistant passivating agent comprises, by mass, 1 to 15 parts of an inorganic acid, 1 to 20 parts of a complexing agent, 1 to 10 parts of rare earth metal salt, 1 to 10 parts of an alkaline-earth metal salt, 1 to 10 parts of an organic alcohol, and 0.5 to 2 parts of a surfactant; the inorganic acid comprises at least one selected from sulfuric acid and nitric acid. The magnesium alloy high-corrosion-resistant passivating agent contains no phosphorus or chromium; formed passive film possesses super excellent corrosion resistance. The invention also discloses passivation technology of the magnesium alloy high-corrosion-resistant passivating agent. The passivation technology comprises steps of degreasing, activating, acidity surface conditioning, alkalinity surface conditioning, passivation, and baking. The passivation technology is capable of changing traditional magnesium alloy passivating t