ELECTRO-GALVANIZED STEEL SHEET COATING COMPOSITION HAVING EXCELLENT HEAT-RESISTANCE AND TAPE ADHESIVENESS, SURFACE-TREATED STEEL SHEET USING SAME, AND MANUFACTURING METHOD OF SAME

摘要

The present invention provides an electro-galvanized steel sheet coating composition having not only excellent heat resistance, corrosion resistance, and chemical resistance, but also adhesiveness to a tape which is used for a chassis. More specifically, the present invention provides an electro-galvanized steel sheet coating composition, a surface-treated steel sheet using same, and a manufacturing method therefor, the coating composition comprising: silane; a silica sol; a polyurethane resin, an acryl-based emulsion resin, or a mixture thereof; an additive for preventing corrosion; and water, wherein the silane includes tetra-functional silane and tri-functional silane.