Patent ID: 6537374
Filing Date: 2003-03-25
Classification: C21D,C23C

Abstract:
A system for galvanizing a strip material, comprising:a hot dip galvanizing tank which galvanizes the strip material; a heater that heats the galvanized strip material; a soaking device that soaks the galvanized strip material; a high temperature cooling zone which cools the soaked strip material to a temperature about the temperature at which transition boiling of water occurs by using a high water volume mist sprayer which sprays a high water volume air-water mixture thereon; and a low temperature cooling zone which cools the soaked strip material while suppressing transition boiling, after cooling in said high temperature cooling zone, by using a low water volume mist sprayer which sprays a low water volume air-water mixture thereon, the low water volume mixture having a lower water volume than the high water volume air-water mixture.