| 摘要 |
The present invention relates to a method for pickling a surface of a steel plate with a high speed in manufacturing an austenitic stainless cold-rolled steel plate requiring surface quality and, more specifically, to a high-chrome austenitic stainless cold-rolled steel plate pickling method for pickling an austenitic stainless cold-rolled steel plate containing at least 16 weight% of chrome, wherein the high-chrome austenitic stainless cold-rolled steel plate pickling method enables a silicon oxide to be removed from a cold-rolled steel plate by dipping the cold-rolled steel plate into a mixed acid solution of which an initial composition contains 110-150g/l of sulfuric acid, 15-25g/l of free hydrofluoric acid, and hydrogen peroxide, and does not substantially contain iron ions. According to the present invention, the expenses for the installing a NOx removal equipment and denitrification equipment can be reduced by not including nitrogen when pickling the austenitic stainless cold-rolled steel plate, easy control of the present invention enables high-speed production since pickling can be adjusted according to hydrogen peroxide concentration and a hydrofluoric acid concentration, and the quality of steel plate after the pickling can be improved. |
