The invention provides a
pickling solution for removing hot-rolled double-phase stainless steel
oxide skin and a
pickling method of the
pickling solution, and the picking solution can be used for quickly removing the
iron oxide skin on the surface of a hot-rolled double-phase stainless steel strip better. The picking method comprises the following steps: preparing the pickling solution by sequentially mixing
hydrochloric acid,
nitric acid and
hydrofluoric acid to obtain a mixture, and standing the mixture for about half an hour after lightly mixing the mixture for about 1-2 minutes, wherein the pickling solution consists of the following components in parts by
mass: 2-3 parts of
hydrochloric acid with concentration being 36%-38%, 1 part of
nitric acid with the concentration being 65%-68%, and not less than 1 part of
hydrofluoric acid with the concentration being 40%; completely soaking a hot-rolled double-phase stainless steel sample into the prepared pickling solution for pickling for 20-35 minutes, observing the
oxide skin removal condition of a plate surface, and taking out the plate surface when the
oxide skin almost drops; and under
tap water, clearing the residual
iron oxide skin attached to the plate surface by use of a banister
brush, then, flushing the plate surface for 1-2 minutes by use of hot water, quickly blow-
drying the plate surface by use of an
air blower, thereby obtaining a pickled solution with better degree of finish.