The Trivalent Chromium Passivator for Casting Aluminumis a product used in the surface passivation process of die - cast aluminum. It has excellent passivation effects and can significantly enhance the oxidation resistance of the surface. It has a high content of effective components and a low consumption rate. The bare film has a long resistance time to neutral salt spray. The formed film can effectively ensure the adhesion between the aluminum material and the coating and improve the corrosion resistance of the aluminum material. The maintenance of the tank solution and the treatment of the wastewater are simple.