HOT DIP METAL COATING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a coating method capable of yielding products having decreased coated film defects by preventing the contact and adhesion of the dross and oxide suspended on the plating bath surface in a snout onto steel strip surfaces. SOLUTION: The steel strip is coated by passing the steel strip through a continuous hot dip plating furnace and the snout and immersing the strip into the hot dip rating bath. At this time, the distance L from the steel strip end during the passage existing on the plating bath surface in the snout to the inside wall surface in the snout immediately near the same is so controlled as to satisfy the equation 2.5×√V<=L(mm)<=75×√V (where V is the moving speed (m/min) of the steel strip).