Having excellent corrosion resistance hot dip galvanized steel which was surface-treated with a surface treatment composition and the use of galvanized steel

The present invention relates to a galvanized steel sheet using a surface treatment composition and surface treatment thereof, the composition for a metal material, in particular for household appliances, building materials, automobiles and the like, to improve with magnesium (Mg) and aluminum ( corrosion resistance and blackening resistance of the steel sheet al) galvanized layer. The present invention is not present as the chrome and the additional problem of mounting apparatus, the problem of increased manufacturing cost and the environmental pollution can be provided to ensure corrosion resistance and blackening resistance of galvanized steel sheets with a surface treatment composition and surface treatment was carried out using the galvanized steel.