HYDROGEN PEROXIDE PICKLING SCHEME FOR STAINLESS STEEL GRADES

摘要

The present invention relates to a process for pickling hot rolled, hot rolled & annealed, and cold rolled & annealed stainless steel strip in a continuous fashion. The process comprises a series of pre-pickling tanks and pickling tanks, and optionally includes a scrubber-brush tank, a de-smutting tank, a filtration unit and a heat exchanger. The process includes a HF/U2SO4 pre-pickle and a UF/U2SO4/U2O2 pickling step.