IONIC LIQUID FOR PICKLING STAINLESS STEEL AND METHOD FOR PICKLING STAINLESS STEEL BY USING SAME

摘要

The present specification discloses an ionic liquid for pickling stainless steel, which is capable of rapidly removing oxide scale from stainless steel at room temperature without using nitric acid or hydrofluoric acid, and a method for pickling stainless steel by using same. A method for pickling stainless steel disclosed according to one embodiment comprises an electrolytic pickling treatment by immersing stainless steel in a pickling solution containing an ionic liquid comprising: at least one of an imidazolium cation, betainium cation, sulfonium cation, piperidinium cation, phosphonium cation, ammonium cation, pyridinium cation, pyrrolidinium cation, and morpholinium cation, as a cationic functional group; and at least one of a halide anion, sulfonate anion, alkyl sulfate anion, phosphinate anion, salicylate anion, nitrate anion, tetrafluoroborate anion, hexafluorophosphate anion, and bistripleimide anion, as an anionic functional group.