STEEL COATING EPOXY RESIN COMPOSITION AND THE PREPARATION OF ITS COATED STEEL PLATE HAVING ANTICORROSIVENESS AND GOOD WELDDING PROPERTY

摘要

PURPOSE: A resin solution composition added with a lubricant capable of improving corrosion resistance and electric conductivity by metal ions and self lubricating property and a treating method of a steel sheet using the same are provided, thereby producing resin coated galvanized steel sheet having excellent weldability, corrosion resistance and processability. CONSTITUTION: The resin solution composition comprises an acryl modified epoxy resin solution; 10 to 40% by weight of melamine resin and 10 to 50% by weight of isocyanate resin as a hardening agent; 3 to 25% by weight of olefin based wax alone or mixtures thereof as a lubricant; 0.1 to 5.0% by weight of a metal salt and 0.5 to 10% by weight of a chrome compound as a corrosion improver. The composition is coated on a chromate treated electrogalvanized steel sheet with a thickness of 0.5 to 0.3 micrometer and baked at 130 to 200deg.C.