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1. WO1996002684 - METHOD FOR DIMENSIONING AN ELECTROPLATING ENCLOSURE WITH A MAGNETIC WIPING DEVICE FOR ELECTROPLATED METALLURGICAL PRODUCTS

Publication Number WO/1996/002684
Publication Date 01.02.1996
International Application No. PCT/FR1994/000907
International Filing Date 20.07.1994
IPC
C23C 2/24 2006.01
CCHEMISTRY; METALLURGY
23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
2Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
14Removing excess of molten coatings; Controlling or regulating the coating thickness
24using magnetic or electric fields
CPC
C23C 2/24
CCHEMISTRY; METALLURGY
23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
2Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
14Removing excess of molten coatings; Controlling or regulating the coating thickness
24using magnetic or electric fields
Applicants
  • DELOT PROCESS (S.A.) [FR/FR]; Zone Industrielle "La Saunière" F-89600 Saint-Florentin, FR (AllExceptUS)
  • DELOT, José [FR/FR]; FR (UsOnly)
  • SANCHEZ, Gérald [FR/FR]; FR (UsOnly)
Inventors
  • DELOT, José; FR
  • SANCHEZ, Gérald; FR
Agents
  • GUIU, Claude; Cabinet Claude Guiu 10, rue Paul-Thénard F-21000 Dijon, FR
Priority Data
Publication Language French (FR)
Filing Language French (FR)
Designated States
Title
(EN) METHOD FOR DIMENSIONING AN ELECTROPLATING ENCLOSURE WITH A MAGNETIC WIPING DEVICE FOR ELECTROPLATED METALLURGICAL PRODUCTS
(FR) PROCEDE DE DIMENSIONNEMENT D'UNE ENCEINTE DE GALVANISATION POURVUE D'UN DISPOSITIF D'ESSUYAGE MAGNETIQUE DE PRODUITS METALLURGIQUES GALVANISES
Abstract
(EN)
A method for dimensioning an electroplating enclosure with a device for magnetically wiping electroplated metallurgical products, particularly applicable to a continuous electroplating method. The method uses a wiping device which is preferably an inductive element arranged about an outlet channel of the enclosure in order to generate a transversal alternating sliding electromagnetic field at the surface of said products. Said method is characterised in that it comprises, mainly on the basis of the transversal dimensions and axial length of said enclosure, the cross section and velocity of the products, the dynamic viscosity and pressure of the coating fluid within the enclosure, the transversal dimensions of said outlet channel, the displacement speed and magnitude of the electromagnetic field in said liquid, and a parameter representative of the roughness, if any, of said metallurgical products, calculating or controlling the conditions in which the Couette lengths respectively associated with the flow of the coating fluid within the enclosure and in its outlet channel, are maintained below the critical values beyond which said flows become markedly turbulent.
(FR)
La présente invention concerne un procédé de dimensionnement d'une enceinte de galvanisation pourvue d'un dispositif d'essuyage magnétique de produits métallurgiques galvanisés, notamment utilisable dans le cadre d'un procédé de galvanisation en continu. Ce procédé, selon lequel le dispositif d'essuyage est préférentiellement un élément inducteur agencé à cet effet autour d'un canal de sortie de l'enceinte pour produire un champ électromagnétique transverse, alternatif et glissant, au niveau de la surface desdits produits, est caractérisé en ce qu'il consiste à calculer ou à vérifier, à partir principalement: des dimensions transversales de ladite enceinte, de sa longueur axiale, de la section transversale desdits produits, de leur vitesse, de la viscosité dynamique dudit liquide de recouvrement, de sa pression dans l'enceinte, des dimensions transversales du canal de sortie de l'enceinte, de la vitesse de déplacement du champ électromagnétique glissant et de son intensité dans ledit liquide, et enfin d'un paramètre représentatif de la rugosité éventuelle des produits métallurgiques, les conditions pour lesquelles les longueurs de Couette associées respectivement à l'écoulement du liquide de recouvrement, dans l'enceinte et dans son canal de sortie, restent inférieures aux valeurs critiques au-delà desquelles lesdits écoulements deviennent nettement turbulents.
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