Method of removing scales and preventing scale formation

摘要

Suppression and removal of scales are efficiently carried out in a steel material hot rolling process and the time of pickling treatment as a successive step is largely shortened. The present invention relates to a process for removing scales and preventing scale formation on a metallic material, characterized by contacting cooling water at a pH of -2 to 4 with a metallic material at a temperature of 100 to 1,200°C in a water cooling step for the metallic material.