SURFACE-TREATING SOLUTION COMPOSITION CONTAINING TRIVALENT CHROMIUM AND INORGANIC COMPOUND, ZINC-BASED PLATED STEEL SHEET SURFACE-TREATED USING SAME, AND METHOD FOR PRODUCING SAME

摘要

The present invention provides a surface-treating solution composition, a zinc-based plated steel sheet surface-treated using same, and a method for producing same, wherein the surface-treating solution composition comprises: 10-20 wt% of a trivalent chromium compound including chromium phosphate (A) and chromium nitrate (B), the content ratio thereof, A/(A+B), satisfying 0.3-0.6; 20-40 wt% of a silane-based sol-gel resin in which three kinds of silane compounds are cross-linked; 0.2-0.4 wt% of an anti-rust corrosion resistant compound; 0.1-0.3 wt% of a molybdenum-based compound; 5-10 wt% of a water-soluble cationic urethane resin; 0.5-2.0 wt% of a silane coupling agent; 0.5-2.0 wt% of an Al compound; and 25.3-63.7 wt% of water. The zinc-based plated steel sheet treated with a surface-treating coating material containing trivalent chromium has excellent effects in terms of corrosion resistance, blackening resistance, fingerprint resistance, pipe-forming oil infiltration, and alkali resistance.