| 摘要 |
PURPOSE:To prevent flawing of the surface of a member to be treated by providing a means for exerting repulsive force to the member traveling in a narrow gap path in the direction opposite from the deflection direction when the above- mentioned member is deflected. CONSTITUTION:A steel strip 7 is guided by inlet guide rollers 8 and a sealing member 2 into the narrow gap path 21 of a narrow gap pickling vessel 1 and is pickled by an acid soln. having the flow toward an acid soln. discharge port 4 from acid soln. supply ports 3 and static pressure nozzles 6. The pickled steel strip is discharged therefrom. The pickling soln. is accelerated by an acceleration pump 11 and is supplied from the ports 3. The strip 7, when deflected by oscillation or catenary, approaches the discharge ports 6 of the static pressure nozzles 5 and therefore the liquid pressure near the ports 6 increases approximately to the inside pressure of the pressure accumulation part 6 of the accumulator 5 so that the contact of the strip 7 with the vessel 1 is prevented.
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