| 摘要 |
A method for pickling steel materials, in particular continuously on a treatment line, comprising a shot-blasting operation, a preparation operation, a pickling operation and a passivation operation, in which line the preparation operation is carried out by bringing the materials into contact with at least one 2 to 10N sulphuric acid solution, and in which line the pickling operation is carried out by bringing the materials into contact with at least one solution containing 1 to 10% by weight of hydrofluoric acid and Fe2+ and Fe3+ ions. No figure.
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