SURFACE TREATING AGENT FOR HOT-DIP ALUMINUM-ZINC STEEL PLATE, AND HOT-DIP ALUMINUM-ZINC STEEL PLATE AND MANUFACTURING METHOD THEREFOR

摘要

A surface treating agent for a hot-dip aluminum-zinc steel plate. The surface treating agent has the following components in parts by mass: 45 to 85 parts of aqueous aliphatic polyurethane resin, 5 to 20 parts of an organic silicon compound, 3 to 15 parts of a carbodiimide compound emulsion; 1 to 5 parts, based on metallic elements, of a water soluble metal slat compound; 1 to 10 parts, based on zirconia, of a water soluble zirconium compound; 1 to 10 parts of water dispersive nanometer clay; and 1 to 15 parts of a fluorine-containing polymer lubrication additive. A steel pate coated with the surface treating agent has good corrosion resistance, tarnish resistance, and machinability.