Method and installation for the electrolytic coating with a...

C - Chemistry – Metallurgy – 25 – D

Patent

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Details

C25D 5/02 (2006.01) B22D 11/06 (2006.01) C25D 1/04 (2006.01) C25D 7/00 (2006.01) C25D 17/02 (2006.01)

Patent

CA 2252923

The invention discloses a method for the electrolytic coating with a metal layer of the casting surface of a cylinder for the continuous casting of thin metal strips between two cylinders or on a single cylinder. The said casting surface is immersed at least partially in an electrolyte solution containing a salt of the metal to be deposited, opposite at least one anode, the said surface is placed in cathode position and a relative motion is created between the said casting surface and the said electrolyte solution, characterised in that insulating masks are inserted between the said anode(s) and the edges of the said casting surface, thus avoiding a concentration of current lines on the said edges and in their vicinity. The invention also concerns an installation for the electrolytic coating with a metal layer of the casting surface (3) of a cylinder for the continuous casting of thin metal strips between two cylinders or on a single cylinder, comprising a vessel (1) containing an electrolyte (2) containing a salt of the metal to be deposited, means (5, 6) for immersing at least partially in the said vessel (1) the said casting surface (3) and for creating a relative motion between the said casting surface and the said electrolyte, at least one anode (4, 4') set in the vessel (1) opposite the said casting surface (3), and means for bringing the said casting surface to a cathodic potential, characterised in that it comprises masks (7, 7') made of an insulating material inserted between the edges (12) of the said casting surface (3) and the said anode(s) (4, 4'), the said masks (7, 7') preventing a concentration of current lines on the said edges (12).

L'invention concerne un procédé de revêtement électrolytique par une couche métallique de la surface de coulée d'un cylindre pour ta coulée continue de bandes métalliques minces entre deux cylindres ou sur un cylindre unique, selon lequel on immerge au moins partiellement ladite surface de coulée dans une solution d'électrolyte contenant un sel du métal à déposer, face à au moins une anode, on place ladite surface en cathode et on crée un mouvement relatif entre ladite surface de coulée et ladite solution d'électrolyte, caractérisé en ce qu'on interpose entre la ou lesdites anodes et les arêtes de ladite surface de coulée des masques isolants évitant une concentration des lignes de courant sur lesdites arêtes et dans leur voisinage. L'invention concerne également une installation de revêtement électrolytique par une couche métallique de la surface de coulée (3) d'un cylindre pour la coulée continue de bandes métalliques minces entre deux cylindres ou sur un cylindre unique, du type comprenant un bac (1) contenant un électrolyte (2) renfermant un sel du métal à déposer, des moyens (5, 6) pour immerger au moins partiellement dans ledit bac (1) ladite surface de coulée (3) et pour créer un mouvement relatif entre ladite surface de coulée et ledit électrolyte, au moins une anode (4, 4') disposée dans le bac (1) face à ladite surface de coulée (3), et des moyens pour porter ladite surface de coulée à un potentiel cathodique, caractérisée en ce qu'elle comporte des masques (7, 7') en un matériau isolant interposés entre les arêtes (12) de ladite surface de coulée (3) et ladite ou lesdites anodes (4, 4'), lesdits masques (7, 7') évitant une concentration des lignes de courant sur lesdites arêtes (12).

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