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EP0004545B1 - Process and apparatus for galvanizing a wire - Google Patents

Process and apparatus for galvanizing a wire Download PDF

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Publication number
EP0004545B1
EP0004545B1 EP79100467A EP79100467A EP0004545B1 EP 0004545 B1 EP0004545 B1 EP 0004545B1 EP 79100467 A EP79100467 A EP 79100467A EP 79100467 A EP79100467 A EP 79100467A EP 0004545 B1 EP0004545 B1 EP 0004545B1
Authority
EP
European Patent Office
Prior art keywords
wire
zinc
zinc bath
gas
tube
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.)
Expired
Application number
EP79100467A
Other languages
German (de)
French (fr)
Other versions
EP0004545A1 (en
Inventor
Werner Dr. Bücker
Christian Rademacher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Messer Griesheim GmbH
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Messer Griesheim GmbH
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Filing date
Publication date
Application filed by Messer Griesheim GmbH filed Critical Messer Griesheim GmbH
Publication of EP0004545A1 publication Critical patent/EP0004545A1/en
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Publication of EP0004545B1 publication Critical patent/EP0004545B1/en
Expired legal-status Critical Current

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    • 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
    • C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
    • C23C2/16—Removing excess of molten coatings; Controlling or regulating the coating thickness using fluids under pressure, e.g. air knives
    • C23C2/18—Removing excess of molten coatings from elongated material
    • C23C2/185—Tubes; Wires
    • 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
    • C23C2/26—After-treatment
    • C23C2/28—Thermal after-treatment, e.g. treatment in oil bath
    • C23C2/29—Cooling or quenching

Definitions

  • the invention relates to a method and a device for galvanizing wire, in which the wire emerges vertically from a zinc bath and the adhering liquid zinc forms the zinc layer after it has solidified.
  • the wire speed, bath temperature, wire size and similar influences a certain part of the liquid zinc adhering to the wire flows back into the bath. This results in a certain thickness of the zinc layer remaining on the wire.
  • the zinc layer that can be achieved in this way is too thin for some areas of application.
  • a method for thick galvanizing of wire which consists of four essential process steps, namely a rapid movement of the wire through the zinc bath, the pumping around of the zinc bath in the direction of the wire exit in order to avoid oxide formation, and a first cooling with an oxygen-free gas and a final hardening with water.
  • Burnt natural gas is preferably used as the oxygen-free gas.
  • the invention is therefore based on the object to provide a method and a device for galvanizing wire, in which the wire emerges vertically from the zinc bath and the adhering liquid zinc forms the zinc layer after its solidification, which without the aid of toxic and aggressive media Enabling an increase in the layer thickness of the adhering zinc and which avoid the previously complicated and complex type of cooling. According to the invention, this is achieved in that the surface of the wire is strongly cooled by a low-boiling liquefied gas immediately after it emerges from the zinc bath.
  • the cooling is preferably carried out by direct contact of the surface of the wire with the liquefied gas, for example by spraying.
  • the vaporized gas can also be used as a protective gas for the still sensitive surface of the galvanized wire.
  • the surface of the wire can also be cooled indirectly by passing it out of the zinc bath through a chamber surrounding it, the inner wall of which is cooled by the low-boiling liquefied gas.
  • Liquefied nitrogen is preferably used as the cooling medium.
  • the evaporated nitrogen can be used as a protective gas for the still sensitive galvanized wire. It can also be used as a carrier gas for a reaction gas such as ammonia or hydrogen sulfide.
  • a device for carrying out the method according to the invention with direct contact between galvanized wire and liquefied gas consists of a tube which surrounds the wire emerging from the zinc bath, dips into the zinc bath and is surrounded by an annular chamber just above the surface of the zinc bath, which has a feed line for liquid nitrogen and has spray orifices directed towards the wire for liquid nitrogen.
  • the tube preferably consists of an insulation material, for example an oxide ceramic, which inhibits the flow of heat into the annular chamber.
  • a zinc bath 1 is shown, from which the wire to be galvanized emerges vertically upwards with the aid of the deflection rollers 2, 3.
  • the wire 4 is surrounded by a tube 5 which merges into an annular chamber 7 by means of a conical transition piece 6.
  • the drinking chamber 7 is arranged directly above the exit point of the wire 4 from the zinc bath 1.
  • another tube 8 connects below the annular chamber 7 and is immersed in the zinc bath 1.
  • This tube 8 consists, at least in the area of the immersion point, of an insulation material 9 which inhibits the supply of heat from the zinc bath 1 into the annular chamber 7.
  • a feed line 10 for liquid nitrogen is connected to the annular chamber 7.
  • the liquid nitrogen exits through spray nozzles 11 which are directed onto the wire 4. Because of the low temperature of the liquid nitrogen, the liquid zinc on the wire solidifies immediately in the area of the spray point. It is not possible to flow back into the zinc bath 1 on the wire 4. This results in a much thicker zinc layer than would be achievable without the measure according to the invention.
  • the vaporized nitrogen flows through the tube 5 upwards and exits the system. Here it acts as a protective gas for the still sensitive zinc layer.
  • reaction gases such as ammonia, hydrogen sulfide or gaseous or liquid hydrocarbons can also be introduced into the tube 5.
  • This device consists essentially of a double-walled tube, the two tubes 12, 13 are connected to one another at the top and bottom by ring flanges 14, 15.
  • An annular chamber 16 is thus formed, through which the liquefied gas flows.
  • the annular chamber 16 has a feed line 17 and a discharge line 18 for the liquefied gas.
  • the direction of flow is indicated by arrows 19, as is the direction of movement of the wire 4 by an arrow 20.
  • This device is particularly suitable for those cases in which the liquefied gas is available in a supercooled state, so that it does not or only during the cooling process evaporated to a small extent.

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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)
  • Physics & Mathematics (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Thermal Sciences (AREA)
  • Coating With Molten Metal (AREA)

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Verzinken von Draht, bei denen der Draht senkrecht aus einem Zinkbad austritt und das anhaftende flüssige Zink nach seiner Erstarrung die Zinkschicht bildet. Je nach Drahtgeschwindigkeit, Badtemperatur, Drahtabmessung und ähnlichen Einflüssen fließt ein gewisser Teil des am Draht anhaftenden flüssigen Zinks in das Bad zurück. Dadurch stellt sich eine bestimmte Dicke der auf dem Draht verbleibenden Zinkschicht ein. Für manche Anwendungsgebiete ist die auf diese Weise erreichbare Zinkschicht zu dünn.The invention relates to a method and a device for galvanizing wire, in which the wire emerges vertically from a zinc bath and the adhering liquid zinc forms the zinc layer after it has solidified. Depending on the wire speed, bath temperature, wire size and similar influences, a certain part of the liquid zinc adhering to the wire flows back into the bath. This results in a certain thickness of the zinc layer remaining on the wire. The zinc layer that can be achieved in this way is too thin for some areas of application.

Es ist bekannt, die Dicke des Überzuges aus geschmolzenem Metall auf einem Metalldraht dadurch zu verstärken, daß man den mit dem geschmolzenen Metall überzogenen Draht in einer Kammer durch eine Flüssigkeit kühlt. Nach der FR - A - 2 116 606 verwendet man hierzu Wasser oder andere Flüssigkeiten mit großer latenter Verdampfungswärme. Dieses Verfahren ist vor allem für solche Metallüberzüge gedacht, die pastenartig erstarren, z.B. Zinn-Blei-Legierungen. Da der Austritt der Kühlflüssigkeit aus der Kammer verhindert werden muß, ist zur Durchführung dieses Verfahrens eine komplizierte Vorrichtung erforderlich.It is known to increase the thickness of the molten metal coating on a metal wire by cooling the wire coated with the molten metal in a chamber by a liquid. According to FR - A - 2 116 606, water or other liquids with high latent heat of vaporization are used for this. This process is primarily intended for metal coatings that solidify in a paste-like manner, e.g. Tin-lead alloys. Since the escape of the cooling liquid from the chamber must be prevented, a complicated device is required to carry out this method.

Bei einem aus der US - A - 3 743 535 bekannten Verfahren durchläuft der mit geschmolzenem Metall überzogene Draht einen aufwärtsgerichteten Wasserstrahl an dessen Scheitelpunkt. Hierbei soll aber nicht die Dicke des Überzuges vergrößert werden, sondern es soll ein frühzeitiges Erstarren des geschmolzenen Metalls erreicht werden, um Reaktionen zwischen dem Überzugmetall und dem Draht zu unterdrücken. Außerdem soll die Oberfläche gut aussehen, weshalb durch eine Külung mit Luft zunächst eine dünne Haut auf dem geschmolzenen Metall erzeugt wird. Wenn der Draht anschließend den Scheitelpunkt des Wasserstrahls durchläuft, wo dieser demnach die geringste Bewegungsenergie besitzt, wird die noch empfindliche Oberfläche durch den Strahl nicht beschädigt und trotzdem eine Kühlung bewirkt.In a method known from US Pat. No. 3,743,535, the wire coated with molten metal passes through an upward jet of water at its apex. However, this is not intended to increase the thickness of the coating, but rather to prematurely solidify the molten metal in order to suppress reactions between the coating metal and the wire. In addition, the surface should look good, which is why a thin skin is first created on the molten metal by cooling with air. When the wire then passes through the apex of the water jet, where it therefore has the lowest kinetic energy, the surface, which is still sensitive, is not damaged by the jet and nevertheless causes cooling.

Aus der US - A - 2 166 250 ist ein Verfahren zur Dickverzinkung von Draht bekannt, welches aus vier wesentlichen Verfahrensschritten besteht, nämlich einer schnellen Bewegung des Drahtes durch das Zinkbad, dem Umpumpen des Zinkbades in Richtung Drahtaustritt zwecks Vermeidung von Oxidbildung, einer ersten Abkühlung mit einem sauerstofffreien Gas und einer Abschlußhärtung durch Wasser. Als sauerstofffreies Gas wird bevorzugt verbranntes Erdgas verwendet.From US-A-2 166 250 a method for thick galvanizing of wire is known, which consists of four essential process steps, namely a rapid movement of the wire through the zinc bath, the pumping around of the zinc bath in the direction of the wire exit in order to avoid oxide formation, and a first cooling with an oxygen-free gas and a final hardening with water. Burnt natural gas is preferably used as the oxygen-free gas.

Auch dieses Verfahren ist wegen seiner vielen Verfahrensschritte aufwendig und kompliziert.This process is also complex and complicated because of its many process steps.

Man hat auch versucht, eine dickere Zinkschicht dadurch zu erreichen, daß man den Draht unmittelbar nach Austritt aus dem Zinkbad einer Gasatmosphäre aussetzte, die Schwefelwasserstoff als aktive Komponente enthielt. Schwefelwasserstoff ist jedoch ein sehr giftiges und chemisch sehr aggresives Gas, so daß die Realisierung einer solchen Verfahrensweise in der Praxis Schwierigkeiten bereitet.Attempts have also been made to achieve a thicker zinc layer by exposing the wire to a gas atmosphere containing hydrogen sulfide as an active component immediately after it has left the zinc bath. However, hydrogen sulfide is a very toxic and chemically very aggressive gas, so that the implementation of such a procedure is difficult in practice.

Der Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung zum Verzinken von Draht zu schaffen, bei denen der Draht senkrecht aus dem Zinkbad austritt und das anhaftende flüssige Zink nach seiner Erstarrung die Zinkschicht bildet, welche ohne die Zuhilfenahme giftiger und aggresiver Medien eine Vergrösserung der Schichtdicke des anhaftenden Zinks ermöglichen und welche die bisher übliche aufwendige und komplizierte Art der Abkühlung vermeiden. Erfindungsgemäß wird dies dadurch erreicht, daß die Oberfläche des Drahtes unmittelbar nach seinem Austritt aus dem Zinkbad durch ein tiefsiedendes verflüssigtes Gas stark abgekühlt wird.The invention is therefore based on the object to provide a method and a device for galvanizing wire, in which the wire emerges vertically from the zinc bath and the adhering liquid zinc forms the zinc layer after its solidification, which without the aid of toxic and aggressive media Enabling an increase in the layer thickness of the adhering zinc and which avoid the previously complicated and complex type of cooling. According to the invention, this is achieved in that the surface of the wire is strongly cooled by a low-boiling liquefied gas immediately after it emerges from the zinc bath.

Hierdurch wird ein rasches Erstarren des auf dem Draht befindlichen flüssigen Zinks bewirkt, die Menge des vom Draht abfließenden Zinks wird also vermindert. Die Schichtdicke wird dadurch vergrößert.This causes the liquid zinc on the wire to solidify rapidly, thus reducing the amount of zinc flowing off the wire. This increases the layer thickness.

Die Abkühlung erfolgt vorzugsweise durch direkten Kontakt der Oberfläche des Drahtes mit dem verflüssigten Gas, beispielsweise durch Besprühen. Ggf. kann hierbei das verdampfte Gas auch zusätzlich als Schutzgas für die noch empfindliche Oberfläche des verzinkten Drahtes verwendet werden. Die Oberfläche des Drahtes kann jedoch auch indirekt abgekühlt werden, indem er nach Austritt aus dem Zinkbad durch eine ihn umgebende Kammer geführt wird, deren Innenwand durch das tiefsiedende verflüssigte Gas gekühlt wird. Bevorzugt wird als Kühlmedium verflüssigter Stickstoff verwendet. Der verdampfte Stickstoff kann als Schutzgas für den noch empfindlichen verzinkten Draht verwendet werden. Er kann auch als Trägergas für ein Reaktionsgas, wie Ammoniak oder Schwefelwasserstoff verwendet werden.The cooling is preferably carried out by direct contact of the surface of the wire with the liquefied gas, for example by spraying. Possibly. the vaporized gas can also be used as a protective gas for the still sensitive surface of the galvanized wire. However, the surface of the wire can also be cooled indirectly by passing it out of the zinc bath through a chamber surrounding it, the inner wall of which is cooled by the low-boiling liquefied gas. Liquefied nitrogen is preferably used as the cooling medium. The evaporated nitrogen can be used as a protective gas for the still sensitive galvanized wire. It can also be used as a carrier gas for a reaction gas such as ammonia or hydrogen sulfide.

Eine Vorrichtung zur Durchführung des erfindungsgemäßen Verfahrens mit direktem Kontakt zwischen verzinktem Draht und verflüssigtem Gas besteht aus einem Rohr, welches den aus dem Zinkbad austretenden Draht umgibt, in das Zinkbad eintaucht und kurz über der Oberfläche des Zinkbades von einer Ringkammer umgeben ist, die eine Zuleitung für flüssigen Stickstoff besitzt und auf den Draht gerichtete Sprühöffnungen gür flüssigen Stickstoff aufweist. Im Bereich der Eintauchstelle in das Zinkbad besteht das Rohr vorzugsweise aus einem Isolationsmaterial, beispielsweise einer Oxidkeramik, die den Wärmezufluß in die Ringkammer hemmt.A device for carrying out the method according to the invention with direct contact between galvanized wire and liquefied gas consists of a tube which surrounds the wire emerging from the zinc bath, dips into the zinc bath and is surrounded by an annular chamber just above the surface of the zinc bath, which has a feed line for liquid nitrogen and has spray orifices directed towards the wire for liquid nitrogen. In the area of the immersion point in the zinc bath, the tube preferably consists of an insulation material, for example an oxide ceramic, which inhibits the flow of heat into the annular chamber.

Die Zeichnungen veranschaulichen in schematischer Form zwei Ausführungsbeispiele der Erfindung im Schnitt.The drawings illustrate in cal matic form two embodiments of the invention in section.

Es zeigen:

  • Fig. 1 eine Vorrichtung für direkten Kontakt zwischen Drahtoberfläche und verflüssigtem Gas,
  • Fig. 2 eine Vorrichtung für indirekten Kontakt zwischen Drahtoberfläche und verflüssigtem Gas.
Show it:
  • 1 shows a device for direct contact between the wire surface and liquefied gas,
  • Fig. 2 shows a device for indirect contact between the wire surface and liquefied gas.

In Fig. 1 ist ein Zinkbad 1 dargestellt, aus dem mit Hilfe der Umlenkrollen 2, 3 der zu verzinkende Draht senkrecht nach oben austritt. Erfindungsgemäß ist der Draht 4 von einem Rohr 5 umgeben, welches mittels eines konischen Übergangsstückes 6 in eine Ringkammer 7 übergeht. Die Rinkammer 7 ist unmittelbar über der Austrittsstelle des Drahtes 4 aus dem Zinkbad 1 angeordnet. In Verlängerung des Rohres 5 schließt sich unterhalb der Ringkammer 7 ein weiteres Rohr 8 an, welches in das Zinkbad 1 eintaucht. Dieses Rohr 8 besteht zumindest im Bereich der Eintauchstelle aus einem Isolationsmaterial 9, welches die Wärmezufuhr aus dem Zinkbad 1 in die Ringkammer 7 hemmt.In Fig. 1, a zinc bath 1 is shown, from which the wire to be galvanized emerges vertically upwards with the aid of the deflection rollers 2, 3. According to the invention, the wire 4 is surrounded by a tube 5 which merges into an annular chamber 7 by means of a conical transition piece 6. The drinking chamber 7 is arranged directly above the exit point of the wire 4 from the zinc bath 1. In extension of the tube 5, another tube 8 connects below the annular chamber 7 and is immersed in the zinc bath 1. This tube 8 consists, at least in the area of the immersion point, of an insulation material 9 which inhibits the supply of heat from the zinc bath 1 into the annular chamber 7.

An die Ringkammer 7 ist eine Zuleitung 10 für flüssigen Stickstoff angeschlossen. Der flüssige Stickstoff tritt durch Sprühdüsen 11 aus, die auf den Draht 4 gerichtet sind. Wegen der tiefen Temperatur des flüssigen Stickstoffes erstarrt das sich auf dem Draht befindende flüssige Zink im Bereich der Sprühstelle sofort. Es hat keine Möglichkeit, am Draht 4 zurück in das Zinkbad 1 zu fliessen. Es ergibt sich dadurch eine wesentlich dickere Zinkschicht, als sie ohne die erfindungsgemäße Maßnahme erreichbar wäre.A feed line 10 for liquid nitrogen is connected to the annular chamber 7. The liquid nitrogen exits through spray nozzles 11 which are directed onto the wire 4. Because of the low temperature of the liquid nitrogen, the liquid zinc on the wire solidifies immediately in the area of the spray point. It is not possible to flow back into the zinc bath 1 on the wire 4. This results in a much thicker zinc layer than would be achievable without the measure according to the invention.

Der verdampfte Stickstoff strömt durch das Rohr 5 nach oben und tritt aus der Anlage aus. Er wirkt hier als Schutzgas für die noch empfindliche Zinkschicht. Falls gewünscht, können in das Rohr 5 zusätzlich noch Reaktionsgase, wie Ammoniak Schwefelwasserstoff oder gasförmige oder flüssige Kohlenwasserstoffe eingeführt werden.The vaporized nitrogen flows through the tube 5 upwards and exits the system. Here it acts as a protective gas for the still sensitive zinc layer. If desired, reaction gases such as ammonia, hydrogen sulfide or gaseous or liquid hydrocarbons can also be introduced into the tube 5.

Fig. 2 zeigt eine Vorrichtung zur indirekten Kühlung des aus dem Zinkbad 1 austretenden Drahtes 4.2 shows a device for indirect cooling of the wire 4 emerging from the zinc bath 1.

Dies Vorrichtung besteht im wesentlichen aus einem doppelwandigen Rohr, dessen beide Rohre 12, 13 oben und unten durch Ringflansche 14, 15 miteinander verbunden sind. Es wird somit eine Ringkammer 16 gebildet, die vom verflüssigten Gas durchflossen wird. Die Ringkammer 16 besitzt eine Zuleitung 17 und eine Ableitung 18 für das verflüssigte Gas. Die Strömungsrichtung ist durch Pfeile 19 angedeutet, desgleichen die Bewegungsrichtung des Drahtes 4 durch einen Pfeil 20. Diese Vorrichtung ist vor allem für solche Fälle geeignet, in denen das verflüssigte Gas in unterkühltem Zustand zur Verfügung steht, so daß es während des Kühlvorganges nicht oder nur in geringem Umfang verdampft.This device consists essentially of a double-walled tube, the two tubes 12, 13 are connected to one another at the top and bottom by ring flanges 14, 15. An annular chamber 16 is thus formed, through which the liquefied gas flows. The annular chamber 16 has a feed line 17 and a discharge line 18 for the liquefied gas. The direction of flow is indicated by arrows 19, as is the direction of movement of the wire 4 by an arrow 20. This device is particularly suitable for those cases in which the liquefied gas is available in a supercooled state, so that it does not or only during the cooling process evaporated to a small extent.

Claims (7)

1. Process for galvanizing a wire wherein the wire vertically leaves a zinc bath and the adhering liquid zinc forms the zinc layer after its solidification, characterized in that the surface of the wire immediately after it leaves the zinc bath is coiled by a low boiling liquified gas.
2. Process according to claim 1, characterized in that the surface of the wire is cooled by the liquified gas as a result of direct contact.
3. Process according to claim 2, characterized in that the surface of the wire is cooled by the liquified gas by means of spraying.
4. Process according to one of the claims 1 to 3, characterized in that the surface of the wire is cooled by liquid nitrogen.
5. Process according to claim 4, characterized in that the evaporated nitrogen functions as protective gas for the galvanized wire, or as a carrier gas for a gas which actively .affects the surface of the galvanized wire.
6. An apparatus for performing the process of claim 5, characterized in a tube (5, 8) disposed to surround the wire (4) leaving the zinc bath (1), said tube being submerged into the zinc bath, and said tube being surrounded just above the surface of the zinc bath by an annular chamber (7) which has a supply line (10) for liquid nitrogen and spray orifices (11) for liquid nitrogen, directed to the wire.
7. Apparatus according to claim 6, characterized in that the portion of said tube (8) in the area of the dipping location in the zinc bath (1) is made of an insulating material (9).
EP79100467A 1978-04-10 1979-02-17 Process and apparatus for galvanizing a wire Expired EP0004545B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2815485 1978-04-10
DE19782815485 DE2815485A1 (en) 1978-04-10 1978-04-10 METHOD AND DEVICE FOR GALVANIZING WIRE

Publications (2)

Publication Number Publication Date
EP0004545A1 EP0004545A1 (en) 1979-10-17
EP0004545B1 true EP0004545B1 (en) 1981-01-28

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EP79100467A Expired EP0004545B1 (en) 1978-04-10 1979-02-17 Process and apparatus for galvanizing a wire

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US (1) US4282273A (en)
EP (1) EP0004545B1 (en)
AT (1) AT359799B (en)
DE (1) DE2815485A1 (en)

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Publication number Publication date
AT359799B (en) 1980-11-25
US4282273A (en) 1981-08-04
DE2815485A1 (en) 1979-10-18
EP0004545A1 (en) 1979-10-17
ATA128379A (en) 1980-04-15

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