EP0029629A1 - Process for the protection of devices for galvanizing metallic products - Google Patents

Process for the protection of devices for galvanizing metallic products Download PDF

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Publication number
EP0029629A1
EP0029629A1 EP80201091A EP80201091A EP0029629A1 EP 0029629 A1 EP0029629 A1 EP 0029629A1 EP 80201091 A EP80201091 A EP 80201091A EP 80201091 A EP80201091 A EP 80201091A EP 0029629 A1 EP0029629 A1 EP 0029629A1
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EP
European Patent Office
Prior art keywords
group
cylinder
oxides
deposited
zirconates
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
EP80201091A
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German (de)
French (fr)
Inventor
Jacques Pelerin
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Centre de Recherches Metallurgiques CRM ASBL
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Centre de Recherches Metallurgiques CRM ASBL
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Publication date
Priority claimed from BE6/47017A external-priority patent/BE880195A/en
Application filed by Centre de Recherches Metallurgiques CRM ASBL filed Critical Centre de Recherches Metallurgiques CRM ASBL
Publication of EP0029629A1 publication Critical patent/EP0029629A1/en
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING 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
    • C23C—COATING 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
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/06—Zinc or cadmium or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C23—COATING 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
    • C23C—COATING 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
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/003—Apparatus
    • C23C2/0034—Details related to elements immersed in bath
    • C23C2/00342—Moving elements, e.g. pumps or mixers
    • C23C2/00344—Means for moving substrates, e.g. immersed rollers or immersed bearings

Definitions

  • the present invention relates to a method for protecting devices for galvanizing metal products. It is applicable, in a particularly advantageous manner, in the case of continuous galvanizing of steel sheets, especially when this galvanizing must only be carried out on one side.
  • Galvanizing on one side can be done in several ways, for example by electroplating trolytic or by immersion on both sides and then removal of most of the deposit on one of the two faces by electrolytic or mechanical means.
  • This process is characterized in that the sheet, before coming into contact with the zinc bath, is wound around a rotating cylinder, partially immersed in the zinc bath.
  • the contact of the sheet with the cylinder at the inlet takes place before the sheet contact with the zinc, and at the exit continues after the sheet-zinc contact has been interrupted, the face adhering to the cylinder being thus not subject to contact with zinc.
  • the group of oxides includes the oxides of Mg, Ca, Sr, Ba, Ti, Zr, Cr, W, Fe, Co, Ni, Zn, Cd, B, Al, Si, Ge, Sn, Pb.
  • the group of silicates contains the silicates of Li, Na, K, Mg, Ca, Sr, Ba, Zr, V, Cr, Mn, Fe, Co, Ni, B, Al, Sn, Pb.
  • the group of zirconates includes the zirconates of Mg, Ca, Sr. Ba.
  • the so-called "mixed” group includes serpentines, amphiboles, silicon carbide.
  • the most advantageous content by weight of Al 2 0 3 is between 35% and 75% of the weight of said material, usable directly either under powder form, either in the form of fibers.
  • the deposition is done by means of a plasma torch using the material considered to constitute the protective coating.
  • an ethyl silicate film is deposited on the said protective layer, which, under the action heat, decomposes with the formation of silica which clogs the micropores which may be on the outer surface of the protective layer.
  • said ethyl silicate is hydrolyzed, which facilitates the formation of silica.
  • a coating was produced by first spraying an intermediate layer of nickel-aluminum alloy, followed by spraying with magnesium zirconate.
  • the total thickness of the coating was approximately 400 microns. .
  • the plates coated with this coating were immersed in zinc for two months and at the end of this test, no attack was observed nor, moreover, any appreciable entrainment of zinc by adhesion.
  • This same product was also used after application on a cylinder fitted to a pilot line. During these tests, it was found that the coating with a total thickness of 450 ⁇ m, ie 300 ⁇ m for the Zr.
  • thermocouple sheaths for example, thermocouple sheaths, tools, etc ...

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Coating With Molten Metal (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Abstract

Process for protecting devices intended for the galvanisation of metal products and in particular of continuous driving cylinders of sheet metal to be galvanised on a single face, characterised in that at least the surface layer of the said cylinders is made up of one or more constituents of the following four groups, taken in isolation or in combination: 1. group of oxides, 2. group of silicates, 3. group of zirconates, 4. so-called "mixed" group. l

Description

La présente invention se rapporte à un procédé de protection de dispositifs pour la galvanisation de produits métalliques. Il est applicable, de façon particulièrement intéressante, dans le cas de la galvanisation en continu de tôles en acier, surtout lorsque cette galvanisation ne doit s'effectuer que sur une seule face.The present invention relates to a method for protecting devices for galvanizing metal products. It is applicable, in a particularly advantageous manner, in the case of continuous galvanizing of steel sheets, especially when this galvanizing must only be carried out on one side.

La description qui suit est axée sur ce dernier cas, mais c'est là uniquement à titre d'exemple, sans aucun caractère de limitation.The description which follows focuses on the latter case, but it is there only by way of example, without any character of limitation.

On sait que dans le cadre des utilisations de tôles d'acier dans l'industrie automobile, la protection de celles-ci s'effectue par galvanisation sur une seule face,l'autre face étant destinée à être recouverte d'une couche de peinture.It is known that in the context of the use of steel sheets in the automotive industry, the protection thereof is carried out by galvanization on one side, the other side being intended to be covered with a layer of paint. .

La réalisation de la galvanisation sur une seule face peut s'effectuer de plusieurs manières, par exemple par dépôt électrolytique ou bien par immersion sur les deux faces et ensuite enlèvement de la majeure partie du dépôt sur une des deux faces par des moyens électrolytiques ou mécaniques.Galvanizing on one side can be done in several ways, for example by electroplating trolytic or by immersion on both sides and then removal of most of the deposit on one of the two faces by electrolytic or mechanical means.

Suivant d'autres procédés, on envisage le dépôt, sur une des faces avant galvanisation, d'un produit empêchant le contact avec le zinc et l'enlèvement de ce produit, après l'opération de galvanisation.According to other methods, it is envisaged the deposition, on one of the faces before galvanizing, of a product preventing contact with the zinc and the removal of this product, after the galvanizing operation.

Dans un brevet antérieur, la même demanderesse a proposé un dispositif de galvanisation sur une seule face qui permet son utilisation sur des lignes de galvanisation existantes avec des modifications mineures de ces lignes.In an earlier patent, the same applicant proposed a galvanizing device on one side which allows its use on existing galvanizing lines with minor modifications of these lines.

Ce procédé est caractérisé en ce que la tôle, avant mise en contact avec le bain de zinc, est enroulée autour d'un cylindre tournant, partiellement immergé dans le bain de zinc. Le contact de la tôle avec le cylindre à l'entrée se fait avant le contact de la tôle avec le zinc, et à la sortie se continue après que le contact tôle - zinc ait été interrompu, la face adhérant sur le cylindre n'étant ainsi pas soumise au contact avec le zinc.This process is characterized in that the sheet, before coming into contact with the zinc bath, is wound around a rotating cylinder, partially immersed in the zinc bath. The contact of the sheet with the cylinder at the inlet takes place before the sheet contact with the zinc, and at the exit continues after the sheet-zinc contact has been interrupted, the face adhering to the cylinder being thus not subject to contact with zinc.

Pour la bonne opération de ce système, il convient évidemment que la surface du cylindre autour duquel la tôle est partiellement enroulée soit traitée de manière à ce qu'elle ne soit pas réactive vis-à-vis du zinc. En particulier, les extrémités du cylindre qui ne sont pas en contact avec la tôle ne peuvent ni se galvaniser ni entraîner de zinc, de manière à éviter le contact du zinc avec la face de la tôle à cacher lors des mouvements latéraux de la tôle qui ne peuvent être évités ou lors des changements de largeur de tôle.For the correct operation of this system, it is obviously necessary that the surface of the cylinder around which the sheet is partially wound is treated so that it is not reactive with respect to zinc. In particular, the ends of the cylinder which are not in contact with the sheet cannot neither galvanize nor entrain zinc, so as to avoid contact of the zinc with the face of the sheet to be hidden during lateral movements of the sheet which cannot be avoided or when changing sheet width.

A la connaissance du demandeur, aucun procédé réellement efficace n'a,jusqu'à présent, été proposé pour résoudre le problème auquel la présente invention a pour objet d'apporter une solution particulièrement intéressante. Le procédé, objet de la présente invention, est essentiellement caractérisé en ce que l'on constitue au moins la couche superficielle du cylindre à traiter, au moyen d'un ou plusieurs des constituants des quatre groupes ci-après, pris isolément ou en combinaison :

  • 1. groupe des oxydes,
  • 2. groupe des silicates,
  • 3. groupe des zirconates,
  • 4. groupe dit "mixte".
To the knowledge of the applicant, no truly effective method has so far been proposed to solve the problem to which the present invention aims to provide a particularly interesting solution. The process which is the subject of the present invention is essentially characterized in that at least the surface layer of the cylinder to be treated is formed, by means of one or more of the constituents of the following four groups, taken individually or in combination :
  • 1. group of oxides,
  • 2. group of silicates,
  • 3. group of zirconates,
  • 4. so-called "mixed" group.

Le groupe des oxydes comporte les oxydes de Mg, Ca, Sr, Ba, Ti, Zr, Cr, W, Fe, Co, Ni, Zn, Cd, B, Al, Si, Ge, Sn, Pb. Le groupe des silicates comporte les silicates de Li, Na, K, Mg, Ca, Sr, Ba, Zr, V, Cr, Mn, Fe, Co, Ni, B, Al, Sn, Pb.The group of oxides includes the oxides of Mg, Ca, Sr, Ba, Ti, Zr, Cr, W, Fe, Co, Ni, Zn, Cd, B, Al, Si, Ge, Sn, Pb. The group of silicates contains the silicates of Li, Na, K, Mg, Ca, Sr, Ba, Zr, V, Cr, Mn, Fe, Co, Ni, B, Al, Sn, Pb.

Le groupe des zirconates comporte les zirconates de Mg, Ca, Sr. Ba.
Le groupe dit "mixte" comporte les serpentines, les amphiboles, le carbure de silicium.The group of zirconates includes the zirconates of Mg, Ca, Sr. Ba.
The so-called "mixed" group includes serpentines, amphiboles, silicon carbide.

Dans le cas particulier où l'on fait usage d'un matériau comportant du silicate d'aluminium, la teneur pondérale la plus intéressante en Al203 est comprise entre 35 % et 75 % du poids du dit matériau, utilisable directement soit sous forme de poudre, soit sous forme de fibres.In the particular case where use is made of a material comprising aluminum silicate, the most advantageous content by weight of Al 2 0 3 is between 35% and 75% of the weight of said material, usable directly either under powder form, either in the form of fibers.

Un cylindre dont la surface est ainsi constituée, présente les avantages ci-après :

  • - absence de réaction avec le zinc,
  • - absence d'entraînement du zinc lors de la rotation du cylindre,
  • - non-mouillabilité par le zinc,
  • - résistance mécanique élevée, même superficiellement,
  • - facilité de constitution.
A cylinder whose surface is thus formed has the following advantages:
  • - no reaction with zinc,
  • - absence of zinc entrainment during cylinder rotation,
  • - non-wettability by zinc,
  • - high mechanical resistance, even superficially,
  • - ease of incorporation.

Plusieurs méthodes peuvent être utilisées avec profit pour constituer la dite couche. On peut notamment appliquer les dits oxydes directement sur le cylindre ou les former "in situ" (par exemple par chauffage dans l'air à environ 1000°C), après application, sous forme de peinture, du métal correspondant, la dite application se faisant à l'intervention d'un liant tel que par exemple des silicates organiques (silicate d'éthylène), des silicates alcalins (K, Na, Li), ou de la silice colloîdale, laquelle peut également servir au colmatage de la surface ainsi recouverte.Several methods can be used with profit to constitute said layer. One can in particular apply the said oxides directly to the cylinder or form them "in situ "(for example by heating in air to approximately 1000 ° C.), after application, in the form of paint, of the corresponding metal, said application being carried out with the intervention of a binder such as for example organic silicates (ethylene silicate), alkaline silicates (K, Na, Li), or colloidal silica, which can also be used for clogging the surface thus covered.

Suivant une autre méthode efficace, le dépôt se fait au moyen d'une torche plasma mettant en oeuvre le matériau considéré pour constituer le revêtement protecteur.According to another effective method, the deposition is done by means of a plasma torch using the material considered to constitute the protective coating.

Dans ce dernier cas, il y a avantage à constituer une sous-couche à base de nickel et/ou d'aluminium, également déposée par plasma.In the latter case, there is an advantage in constituting a nickel and / or aluminum base sublayer, also deposited by plasma.

Parmi les matériaux cités ci-dessus, la préférence est donnée au Zr Mgo3.Among the materials mentioned above, preference is given to Zr Mgo3.

Suivant une autre variante avantageuse, spécialement dans le cas où le matériau destiné à constituer le revêtement protecteur est déposé par torche plasma sur le cylindre, on dépose sur la dite couche protectrice, un film de silicate d'éthyle, lequel, sous l'action de la chaleur, se décompose avec formation de silice qui obstrue les micropores pouvant se trouver sur la surface extérieure de la couche protectrice. Préférem- ment, le dit silicate d'éthyle est hydrolysé, ce qui facilite la formation de la silice.According to another advantageous variant, especially in the case where the material intended to constitute the protective coating is deposited by plasma torch on the cylinder, an ethyl silicate film is deposited on the said protective layer, which, under the action heat, decomposes with the formation of silica which clogs the micropores which may be on the outer surface of the protective layer. Preferably, said ethyl silicate is hydrolyzed, which facilitates the formation of silica.

A titre d'exemple, signalons qu'un revêtement a été réalisé par projection d'abord d'une couche intermédiaire en alliage nickel- aluminium, suivie de la projection de zirconate de magnésium L'épaisseur totale du revêtement était d'environ 400 microns. Les plaquettes revêtues de ce revêtement ont été immergées dans le zinc, pendant deux mois et à l'issue de cet essai, aucune attaque n'a été observée ni d'ailleurs aucun entraînement appréciable de zinc par adhérence. Ce même produit a été également utilisé après application sur un cylindre équipant une ligne pilote. Au cours de ces essais, on a constaté que le revêtement d'une épaisseur totale de 450 µm, soit 300 µm pour le Zr. Mg03 et 150 µm pour la sous-couche NiAl, non seulement a tenu parfaitement au cours du passage de la tôle d'acier, mais a assuré également l'imperméabilité vis-à-vis du zinc, de la face de l'acier qui était à protéger. On a pu en effet constater que la grande énergie interfaciale entre le zinc et le revêtement conduisait à des forces de capillarité négatives, empêchant toute infiltration du zinc entre la tôle et le cylindre, même lorsqu'un interstice se formait accidentellement.By way of example, it should be noted that a coating was produced by first spraying an intermediate layer of nickel-aluminum alloy, followed by spraying with magnesium zirconate. The total thickness of the coating was approximately 400 microns. . The plates coated with this coating were immersed in zinc for two months and at the end of this test, no attack was observed nor, moreover, any appreciable entrainment of zinc by adhesion. This same product was also used after application on a cylinder fitted to a pilot line. During these tests, it was found that the coating with a total thickness of 450 μm, ie 300 μm for the Zr. Mg0 3 and 150 µm for the NiAl underlay, not only held perfectly during the passage of the steel sheet, but also ensured the impermeability vis-à-vis zinc, of the face of the steel who was to be protected. It has indeed been observed that the large interfacial energy between the zinc and the coating leads to negative capillary forces, preventing any infiltration of the zinc between the sheet and the cylinder, even when an interstice is formed accidentally.

Le procédé décrit ci-dessus est également applicable dans le cas de protection de l'intérieur de la cuve de galvanisation (cuve en acier devant contenir du zinc) ou d'accessoires divers : gaines de thermocouple, outils, etc...The process described above is also applicable in the case of protection of the interior of the galvanizing tank (steel tank having to contain zinc) or of various accessories: thermocouple sheaths, tools, etc ...

Claims (13)

1. Procédé de protection de dispositifs destinés à la galvanisation de produits métalliques, et en particulier de cylindres d'entraînement en continu de tôle à galvaniser sur une seule face, caractérisé en ce que l'on constitue au moins la couche superficielle des dits cylindres, au moyen d'un ou plusieurs constituants des quatre groupes ci-après, pris isolément ou en combinaison : 1. groupe des oxydes, 2. groupe des silicates, 3. groupe des zirconates, 4. groupe dit "mixte". 1. Method for protecting devices intended for galvanizing metal products, and in particular cylinders for continuously driving sheet metal to be galvanized on one side, characterized in that at least the surface layer of said cylinders is formed , by means of one or more constituents of the following four groups, taken individually or in combination: 1. group of oxides, 2. group of silicates, 3. group of zirconates, 4. so-called "mixed" group. 2. Procédé suivant la revendication 1, caractérisé en ce que le groupe des oxydes comporte les oxydes de Mg, Ca, Sr, Ba, Ti Zr, Cr, W, Fe, Co, Ni, Zn, Cd, B, Al, Si, Ge, Sn, Pb.2. Method according to claim 1, characterized in that the group of oxides comprises the oxides of Mg, Ca, Sr, Ba, Ti Zr, Cr, W, Fe, Co, Ni, Zn, Cd, B, Al, Si , Ge, Sn, Pb. 3. Procédé suivant la revendication 1, caractérisé en ce que le groupe des silicates comporte les silicates de Li, Na, K, Mg, Ca, Sr, Ba, Zr, V, Cr, Mn, Fe, Co, Ni, B, Al, Sn, Pb.3. Method according to claim 1, characterized in that the group of silicates includes silicates of Li, Na, K, Mg, Ca, Sr, Ba, Zr, V, Cr, Mn, Fe, Co, Ni, B, Al, Sn, Pb. 4. Procédé suivant la revendication 1, caractérisé en ce que le groupe des zirconates comporte les zirconates de Mg, Ca, Sr, Ba.4. Method according to claim 1, characterized in that the group of zirconates comprises the zirconates of Mg, Ca, Sr, Ba. 5. Procédé suivant la revendication 1, caractérisé en ce que le groupe dit "mixte" comporte les serpentines, les amphiboles, le carbure de silicium.5. Method according to claim 1, characterized in that the group called "mixed" comprises serpentines, amphiboles, silicon carbide. 6. Procédé suivant l'une ou l'autre des revendications 1 à 5, caractérisé en ce que la couche superficielle comporte du silicate d'aluminium, la teneur pondérale la plus intéressante en Al2O3 étant comprise entre 35 % et 75 % du poids du dit matériau.6. Method according to either of claims 1 to 5, characterized in that the surface layer comprises aluminum silicate, the most advantageous content by weight of Al 2 O 3 being between 35% and 75% the weight of said material. 7. Procédé suivant l'une ou l'autre des revendications 1 à 6, caractérisé en ce que l'on applique les oxydes directement sur le cylindre.7. Method according to either of claims 1 to 6, characterized in that the oxides are applied directly to the cylinder. 8. Procédé suivant l'une ou l'autre des revendications 1 à 6, caractérisé en ce que les oxydes sont formés sur le cylindre, par dépôt préalable, sur celui-ci, du métal correspondant, suivi d'un chauffage à température et sous atmosphère appropriée pour provoquer l'oxydation "in situ".8. Process according to either of Claims 1 to 6, characterized in that the oxides are formed on the cylinder, by prior deposition, on the latter, of the corresponding metal, followed by heating to temperature and under an appropriate atmosphere to cause oxidation "in situ". 9. Procédé suivant l'une ou l'autre des revendications 1 à 8, caractérisé en ce que le contact entre le matériau déposé et le cylindre est facilité par la présence de silicate, organique ou alcalin, ou de silice colloidale.9. Method according to either of claims 1 to 8, characterized in that the contact between the deposited material and the cylinder is facilitated by the presence of silicate, organic or alkaline, or colloidal silica. 10. Procédé suivant l'une ou l'autre des revendications 1 à 9, caractérisé en ce que le dépôt est fait à l'intervention d'une torche plasma.10. Method according to either of claims 1 to 9, characterized in that the deposition is made with the intervention of a plasma torch. 11. Procédé suivant la revendication 10, caractérisé en ce que, avant dépôt du matériau de couverture, on dépose sur le cylindre, également ou de préférence par plasma, une sous-couche à base de nickel et/ou d'aluminium.11. Method according to claim 10, characterized in that, before depositing the covering material, is deposited on the cylinder, also or preferably by plasma, a sublayer based on nickel and / or aluminum. 12. Procédé suivant l'une ou l'autre des revendications 1 à 11, caractérisé en ce que le matériau déposé est constitué principalement de zirconate de magnésium.12. Method according to either of claims 1 to 11, characterized in that the deposited material consists mainly of magnesium zirconate. 13. Procédé suivant l'une ou l'autre des revendicationsl à 12, caractérisé en ce que sur le revêtement protecteur, déposé de préférence par plasma sur le cylindre, on dépose un film de silicate d'éthyle, de préférence hydrolysé.13. Method according to either of claimsl to 12, characterized in that on the protective coating, preferably deposited by plasma on the cylinder, an ethyl silicate film, preferably hydrolysed, is deposited.
EP80201091A 1979-11-21 1980-11-17 Process for the protection of devices for galvanizing metallic products Withdrawn EP0029629A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE47017 1979-11-21
BE6/47017A BE880195A (en) 1979-11-21 1979-11-21 METHOD FOR PROTECTING DEVICES FOR GALVANIZING METAL PRODUCTS

Publications (1)

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EP0029629A1 true EP0029629A1 (en) 1981-06-03

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JP (1) JPS5789500A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0524851A1 (en) * 1991-07-26 1993-01-27 Vesuvius France S.A. Process for deposing metal or metal alloys on a metal strip and guide pieces for implementing this process
FR2694304A1 (en) * 1992-07-29 1994-02-04 France Sa Union Miniere Metallic part with enamel surface layer - used as immersed part in molten metal esp. hot dip coating bath
EP0602680A1 (en) * 1992-12-18 1994-06-22 Praxair S.T. Technology, Inc. Potassium silicate-containing sealant

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* Cited by examiner, † Cited by third party
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DE13976C (en) * J. G. SEEBERGER in Mkt. Redwitz im Ficbtelgebirge Apparatus and process for galvanizing iron
BE421636A (en) *
FR834819A (en) * 1937-08-17 1938-12-02 Metallia Tank for galvanizing and similar operations
DE718995C (en) * 1939-03-23 1942-03-26 Bandeisenwalzwerke Ag Device for one-sided tinning of metal strips, sheets or the like.
FR1393906A (en) * 1963-05-15 1965-03-26 Tetra Pak Ab Process for depositing a ceramic coating on a metal surface
US3611530A (en) * 1970-03-19 1971-10-12 John T Mayhew Antipickup roll construction and utilization for plating lines
DE2446169A1 (en) * 1974-09-27 1976-04-22 Metallgesellschaft Ag Protective ceramic coating - for hot dip galvanizing tanks and equipment
FR2348278A1 (en) * 1976-04-15 1977-11-10 Centre Rech Metallurgique Continuous hot dip galvanizing of metal sheet - fed round roller partly immersed in zinc bath so coating is obtd. only on one side
JPS5325293B2 (en) * 1973-05-02 1978-07-26

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE13976C (en) * J. G. SEEBERGER in Mkt. Redwitz im Ficbtelgebirge Apparatus and process for galvanizing iron
BE421636A (en) *
FR834819A (en) * 1937-08-17 1938-12-02 Metallia Tank for galvanizing and similar operations
DE718995C (en) * 1939-03-23 1942-03-26 Bandeisenwalzwerke Ag Device for one-sided tinning of metal strips, sheets or the like.
FR1393906A (en) * 1963-05-15 1965-03-26 Tetra Pak Ab Process for depositing a ceramic coating on a metal surface
US3611530A (en) * 1970-03-19 1971-10-12 John T Mayhew Antipickup roll construction and utilization for plating lines
JPS5325293B2 (en) * 1973-05-02 1978-07-26
DE2446169A1 (en) * 1974-09-27 1976-04-22 Metallgesellschaft Ag Protective ceramic coating - for hot dip galvanizing tanks and equipment
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Title
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0524851A1 (en) * 1991-07-26 1993-01-27 Vesuvius France S.A. Process for deposing metal or metal alloys on a metal strip and guide pieces for implementing this process
FR2679571A1 (en) * 1991-07-26 1993-01-29 Vesuvius France Sa METHOD FOR DEPOSITING METAL OR METAL ALLOYS ONTO A METAL STRIP AND GUIDING PARTS FOR CARRYING OUT SAID METHOD.
US5718766A (en) * 1991-07-26 1998-02-17 Vesuvius Crucible Company Apparatus for guiding metal strip in a molted metal bath
FR2694304A1 (en) * 1992-07-29 1994-02-04 France Sa Union Miniere Metallic part with enamel surface layer - used as immersed part in molten metal esp. hot dip coating bath
EP0602680A1 (en) * 1992-12-18 1994-06-22 Praxair S.T. Technology, Inc. Potassium silicate-containing sealant

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