POSCO Holdings Inc.
APPARATUS FOR COOLING HOT-DIP PLATED STEEL SHEET

Abstract:

Provided is an apparatus for cooling a hot-dip plated steel sheet, the apparatus being capable of reducing comb-pattern surface defects occurring on the edge portion of the hot-dip plated steel sheet. The apparatus includes: a gas knife for spraying wiping gas to a steel sheet that has passed through a plating bath, thereby adjusting the plating thickness thereof; a defect prevention portion installed downstream of the gas knife so as to spray cooling gas to the steel sheet, thereby cooling same; and a moving portion for driving the defect prevention portion such that same moves.