C - Chemistry – Metallurgy – 23 – G
Patent
C - Chemistry, Metallurgy
23
G
C23G 1/36 (2006.01) C23G 1/10 (2006.01) C23G 3/02 (2006.01)
Patent
CA 2190779
Method in which the pickling solution is sprayed onto the metal part in a confined atmosphere with an oxygen supply by feeding into the spraying enclosure an oxygen-containing gas, the pickling solution being recycled in a closed pickling solution circuit. The device for pickling metal surfaces comprises a spraying enclosure (1) with a collecting tank (2), means for spraying (6) a pickling solution (S) in said enclosure, means (11) for recirculating said solution between said tank (2) and said spraying means (6) and means (8, 9) for passing an oxygen-containing gas through said enclosure, and optionally means (13) for maintaining the temperature of said solution, and control means. The method of the invention is designed to improve the productivity of lines for pickling stainless or alloy steel components while economising on reagents.
Procédé dams lequel la solution de décapage est pulvérisée sur la pièce métallique dans une atmosphère confinée avec un apport d'oxygène par introduction dans l'enceinte de pulvérisation d'un gaz contenant de l'oxygène, la solution de décapage étant recyclée dan un circuit fermé de solution de décapage. Dispositif de décapage par pulvérisation de surfaces métalliques qui comprend une enceinte de pulvérisation (1) munie d'une cuve réceptrice (2), des moyens de pulvérisation (6) d'une solution de décapage (S) dans ladite enceinte, des moyens de recirculation (11) de ladite solution entre ladite cuve (2) et lesdits moyens de pulvérisation (6), et des moyens de ventilation de ladite enceinte (8, 9) par un gaz (G) contenant de l'oxygène, et ' . " des moyens de maintien en température ( 13) de ladite solution et des moyens de contrôle. Amélioration de la productivité de lignes de décapage de pièces en acier inoxydable ou allié en économisant les réactifs.
Paul Didier
Vialatte Bernard
Robic
Ugine S.a.
Usinor Sacilor
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