EP0402270A1 - System und Vorrichtung zum kontinuierlichen/unterbrochenen Überziehen von Werkstücken durch Eintauchen der Werkstücke in ein Bad aus flüssigem metallischen Überzugsmaterial - Google Patents

System und Vorrichtung zum kontinuierlichen/unterbrochenen Überziehen von Werkstücken durch Eintauchen der Werkstücke in ein Bad aus flüssigem metallischen Überzugsmaterial Download PDF

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Publication number
EP0402270A1
EP0402270A1 EP90401577A EP90401577A EP0402270A1 EP 0402270 A1 EP0402270 A1 EP 0402270A1 EP 90401577 A EP90401577 A EP 90401577A EP 90401577 A EP90401577 A EP 90401577A EP 0402270 A1 EP0402270 A1 EP 0402270A1
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EP
European Patent Office
Prior art keywords
enclosure
objects
bath
coating
liquid
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.)
Granted
Application number
EP90401577A
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English (en)
French (fr)
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EP0402270B1 (de
Inventor
José Delot
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.)
SNTN-DEVELOPPEMENT S.A.
Original Assignee
Delot Process SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from FR8907697A external-priority patent/FR2648155B1/fr
Priority claimed from FR8911344A external-priority patent/FR2651247B1/fr
Application filed by Delot Process SA filed Critical Delot Process SA
Publication of EP0402270A1 publication Critical patent/EP0402270A1/de
Application granted granted Critical
Publication of EP0402270B1 publication Critical patent/EP0402270B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • C23C2/14—Removing excess of molten coatings; Controlling or regulating the coating thickness
    • C23C2/24—Removing excess of molten coatings; Controlling or regulating the coating thickness using magnetic or electric fields
    • 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
    • C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C23C2/024—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by cleaning or etching
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S118/00—Coating apparatus
    • Y10S118/11—Pipe and tube outside

Definitions

  • the present invention relates to a method, an enclosure and an installation for the continuous / intermittent coating of objects by passing said objects through a bath of a liquid coating product. It applies in particular to the specific case of galvanizing metal objects from products based on metal or metal alloy, but also to installations making it possible to apply a liquid coating product of any other nature, such as certain resins or certain paints, on metallic objects or not.
  • this layer must imperatively be thin so as not to risk reducing the resistance of the surface protective layer, since it is well established that a thick intermetallic layer tends to crack and then peel off the surface of the object she is supposed to protect.
  • the heating preferably by HF induction
  • the heating is faster and more profitable from the point of view of the energy balance of the installation, its control being also more precise than a heating by Joule effect.
  • a very short heating time combined with a very short galvanizing time, not only makes it possible to avoid a structural modification of these steels, but also provides rapid quenching thereof allowing them to recover their original mechanical qualities before drawing.
  • the volume of the molten coating product bath is always very large; however, as steel objects pass through this bath, the latter becomes saturated with iron and an iron-zinc alloy is formed which is deposited at the bottom of the galvanization enclosure in the form of mattes, which are detrimental to the purity of the bath and, consequently, to the quality of the coating.
  • the present invention aims to remedy the serious drawbacks linked to structural or accidental leaks from known installations by proposing a method for the continuous / intermittent coating of objects by passing said objects through a bath of a liquid coating product contained in an enclosure having aligned inlet and outlet orifices, such a method being applied for example to coating by continuous galvanizing / intermittent of metallic objects from a molten metal or metallic alloy, or alternatively to processes making it possible to apply, hot or cold, a liquid coating product of any other nature, such as certain resins or certain paints, on metallic objects or not, said process being characterized in that the integrity of the liquid coating product is permanently preserved, whether it is the bath located inside said enclosure or the product liquid circulating outside this same enclosure.
  • an enclosure which can be used to cover with a liquid coating product, for example based on metal or a metal alloy, continuous or discontinuous objects passing through it continuously or intermittently, along parallel scrolling axes offset from the longitudinal axis of said enclosure, characterized in that it comprises a tubular body made of a material permeable to magnetic fields, preferably not wettable by the liquid product, and at each of its ends, at least one electromagnetic valve comprising: - at least one polyphase inductor winding arranged around said tubular body to create a magnetic field sliding along the longitudinal axis of this same tubular body, and tending to push the coating product towards the interior of the enclosure, - A core integral with the tubular body and extending along its axis, so as to provide, between it and the internal wall of the tubular body, a passage of suitable shape for the passage of objects passing longitudinally through
  • the volume of the bath of liquid or molten product contained in the enclosure can be very small, or at least appreciably smaller than the volume of the bath generally used by conventional methods, in particular for galvanization. hot. Consequently, a very rapid renewal of the bath takes place as the liquid or molten product is deposited on the objects passing through the enclosure, which contributes in a very important way to preserving the integrity of this bath in mitigating the harmful consequences of chemical reactions between the latter and the treated objects, such as iron-zinc reactions specific to hot galvanizing of steel objects (formation of mattes).
  • the renewal of the bath thus combines a set of parameters which it is particularly simple and advantageous to control by means of the process according to the present invention; this renewal depends at the same time: - the running speed of the objects to be treated in the enclosure, the length of this enclosure and its volume, which determines the contact time between these objects and the bath which we have seen must be very short in accordance with the general teachings of the continuous galvanizing process, the volume of said bath depleting as a protective layer is deposited on said objects, - the rate of recycling of accidental and / or structural leaks, if applicable, - the enclosure feed rate from a tank containing the liquid or molten coating product.
  • a small volume enclosure can be provided, with a first advantage with regard to the integrity of the bath contained in the enclosure due to the elimination of the harmful consequences of the chemical reactions which may occur between this bath and the objects to be treated, and with the second advantage of favoring, by a sufficiently short or even adjustable enclosure length, the control of the contact time, while allowing a scrolling speed all the easier to maintain as it will be weaker.
  • the sealed enclosure for hot-dip galvanizing comprises a tubular body 1 which is filled by suitable means with a liquid product 2, such as molten zinc or a molten zinc alloy , intended to cover objects 3, for example metallic, in order to protect them against corrosion.
  • the tubular body 1 is open at its two ends 4 and 5 to allow the scrolling of the objects 3 to be covered.
  • a first electromagnetic valve 6 disposed at one end 4 of the tubular body 1 makes it possible to seal the inlet of the enclosure, and a second electromagnetic valve 7 disposed at the other end 5 of said tubular body 1 makes it possible to seal the outlet. In this way, a "bubble" of liquid product 2 is trapped between the two valves 6 and 7.
  • the enclosure is equipped with two injectors 8 making it possible to control the injection of a neutral or reducing gas into the tubular body 1.
  • the enclosure is supplied with liquid product 2 by a reservoir, not shown in FIG. 1, connected to said enclosure by a supply duct 9. Furthermore, a drain orifice 10, normally closed, is provided on the enclosure , and allows the enclosure to be emptied between two galvanizing campaigns in order to carry out its maintenance.
  • tubular body 1 and the supply duct 9 comprise, in known manner, a heating device not shown in FIG. 1; these devices, which can be constituted by induction heating or by conventional electrical heating resistors, provide the heat necessary to keep the liquid product 2 in fusion, such as molten zinc or a molten zinc alloy. It is clear that these heating devices would be useless in the case of a cold coating process.
  • the electromagnetic valves 6 and 7 are preferably valves of the type described in French patent application FR-89/07296 filed on June 2, 1989 in the name of the same applicant.
  • the valve 6 disposed at the inlet of the tubular body 1 thus comprises: a polyphase inductor winding 11, surrounding the tubular body 1 at its end 4 to create a magnetic field sliding along the longitudinal axis of said tubular body 1, a magnetic core 12 secured to the tubular body 1 and extending along its longitudinal axis, the magnetic field lines therefore closing inside said core 12.
  • tubular body 1 is, of course, made of a material permeable to the magnetic field, such as a ceramic. This material is moreover not wettable by the liquid product 2.
  • a device 13 for adjusting the intensity of the polyphase current from a current source not shown in FIG. 1 - is connected to the inductor winding 11, and feeds it so that the magnetic field created tends to discharge the liquid product 2 towards the interior of the enclosure. Indeed, traversed by a current of appropriate intensity, the inductor winding 11 creates, in particular in its middle, magnetomotive forces (represented by arrows in FIG. 1) which act on the liquid product 2, and are opposed to its flow through the entry of the tubular body 1.
  • valve 7 disposed at the outlet of the tubular body 1 comprises: a polyphase inductor winding 14, surrounding the tubular body 1 at its end 5 to create a magnetic field sliding along the longitudinal axis of said tubular body 1, a magnetic core 15 secured to the tubular body 1 and extending along its longitudinal axis, the magnetic field lines therefore closing inside said core 15.
  • a device 16 for adjusting the intensity of the current from the polyphase current source is connected to the inductor winding 14, and supplies the latter so that the magnetic field created tends to repel the liquid product 2 towards the inside the enclosure.
  • the magnetomotive forces created by the inductor winding 14 act on the liquid product 2 unlike the forces created by the inductor winding 11 of the valve 6, and oppose its flow through the outlet of the tubular body 1.
  • This type of electromagnetic valve 6, 7 with a fixed central magnetic core 12, 15 advantageously solves the problem of interruptions in the movement of the object 3, or of the objects 3, to be covered in the enclosure. Indeed, beyond the presence or absence of objects 3 to be covered in the middle of the inductor windings 11, 14 of the valves 6, 7 ensuring the tightness of the enclosure, a fixed core 12, 15 extends longitudinally in the middle of these windings 11, 14, so that the intensity level of the polyphase current to be supplied, in order to avoid any leakage of liquid product 2 covering out of the enclosure, remains within an acceptable limit.
  • the objects 3 to be covered can therefore be presented at the entrance to the enclosure in a continuous form, which is conventional, or in a discontinuous form, that is to say be divided into several smaller pieces; the intermittent movement of the objects 3 to be covered through the enclosure resulting from this latter arrangement does not require any complex intervention, and makes the use of the sealed enclosure implementing the method according to the present invention particularly advantageous.
  • the metallurgical deposit obtained on conventional concrete steel wires is perfectly regular; in particular, a concrete wire comprises a succession of notches and projecting parts, called imprints and bolts respectively, of which a part of the profile is substantially perpendicular to the longitudinal direction of said wire. It was possible to obtain, thanks to the enclosure which is the subject of the invention, wires of concrete irons covered with a metallurgical deposit of zinc alloy of constant thickness, even in its steepest parts.
  • the inductor winding 14 can be movable and move on an appropriate support 17, which can for example comprise means 18 for adjusting the position of the inductor winding 14 along the end 5 of the tubular body 1.
  • This adjustment means 18 may, for its part, comprise a nut 19, linked to the support 17, and a conventional worm screw 20 driven in rotation by a stepping motor 21.
  • the volume of liquid product 2 trapped between the valves 6 and 7 is in this way variable - in FIG. 1, we have chosen to represent the inductor winding 14 in solid lines around its extreme position, and in thin broken lines at a particular position along the end 5 of the tubular body 1 -.
  • the core 15 of the electromagnetic valve 7 is therefore longer than the core 12 of the electromagnetic valve 6 which is also fixed, for a established position of the winding 14, only the part of the core 12 located in the middle of said winding 14 is used.
  • This latter arrangement makes it possible to control, for a given running speed of the objects 3 in the enclosure, the contact time between said objects 3 and the liquid product 2. It will be recalled that this contact time is an essential factor in galvanizing in continued ; this feature of the sealed enclosure for the implementation of the method according to the invention provides a very important additional parameter for controlling the quality and thickness of the liquid product 2 deposited on the objects 3. In addition, the adjustment of the volume of the bath contained in the sealed enclosure, obtained through this, contributes to maintaining the integrity of the liquid product 2 with respect to chemical reactions, such as iron-zinc reactions, occurring in contact with objects 3 and said product 2.
  • the cores 12 and 15 of the electromagnetic valves 6 and 7 enabling the enclosure to be sealed are held longitudinally in the central zone of the tubular body 1 by means of spacers 22, the shape of which is adapted to the profile of the section of said tubular body 1 and to the profile of the section of the cores 12 and 15 respectively, said spacers 22 providing intermediate spaces 24 between said cores 12 and 15 and the internal surface of the tubular body 1 .
  • the intermediate spaces 24 constitute passage zones for the scrolling of the objects 3.
  • the scrolling axes of these objects 3 through the enclosure are in this way offset relative to the longitudinal axis of the tubular body 1.
  • the magnetizable volume which is located in the middle of the inductor windings 11 and 14 defines, among other parameters, the intensities of the currents which must flow therein to seal off the enclosure: - remember that in the known case where the object 3 to be covered serves as a nucleus (case of French patent application FR-89/07297 already mentioned), the magnetizable volume varies constantly with the section of this object 3 and its nature; precise and good quality control on the intensity of the currents is then necessary in order to be able to control, on the one hand the leaks of the liquid product 2, and on the other hand the thickness of deposit of this liquid product 2 on the object 3 crossing the enclosure.
  • the properties of these cores 12, 15, for example their magnetic susceptibility and their section can be chosen so as to make the adjustment of the electromagnetic valves 6 and 7 very insensitive with respect to the passage of objects 3 next to these cores 12, 15; in fact, the magnetizable volume, which determines the intensities of the polyphase currents having to circulate in the inductor windings 11, 14 to seal the enclosure, can then essentially consist of the volume of said fixed cores 12, 15.
  • tubular body 1 Several embodiments of the tubular body 1 will now be described.
  • the tubular body 1 may be of circular cross section; the magnetic core 12 or 15 can then be a simple cylindrical bar, the cross section of which is a disc, the spacers 22 delimiting, for example, intermediate spaces 24 of circular or oval section, such as intermediate spaces 26.
  • An enclosure equipped with two valves 6 and 7 having such a cross section can be used in particular to treat against corrosion of the concrete wires 27. This particular case, given by way of example, corresponds to the enclosure which is shown in FIG. 1.
  • profiles for example steel, can be treated.
  • FIG. 3 we have chosen to show a set of two angles "U" crossing the enclosure at the level of the valves 6 and 7 by the passages provided, between very simplified spacers 22, by means of intermediate spaces 29 of rectangular cross section.
  • the magnetic cores 12 and 15 are then elongated sheets.
  • FIG. 4 we have chosen to show a set of two profiles 30 passing through the enclosure at the level of the valves 6 and 7 by the passages provided, between spacers 22 largely filling the volume of the tubular body 1, by means of spaces spacers 31 of cross section homothetic to the cross section of a profile.
  • the magnetic cores 12 and 15 are then simple cylindrical bars.
  • the cross section of the intermediate spaces 24 is advantageously homothetic to the cross section of the objects 3 to be treated.
  • sheets 32 for example of steel. These sheets 32 pass through the enclosure at the level of the valves 6 and 7 by the passages provided, between very simplified spacers 33, by intermediate spaces 34 of rectangular cross section.
  • the cores 12 and 15 then consist of elongated magnetic sheets.
  • the cores 12 and 15 of the valves 6 and 7 respectively can thus be presented in various forms, with symmetry of revolution, with plane symmetry or possibly being asymmetrical (case not shown).
  • FIGS. 6 to 8 several installations for implementing the method according to the present invention, and comprising, by way of nonlimiting example, a sealed enclosure identical to that which has just been described. .
  • the essential parts of the installation are shown schematically in axial section, and the enclosure can simultaneously process two objects 3, such as concrete reinforcing wires, running in parallel and which are placed, at this effect, in a common vertical plane passing through the central cores 12, 15 of the valves 6 and 7.
  • the flow rate of the liquid coating product 2 towards said enclosure is regulated as a function of the speed of movement of the objects 3 to be covered in the enclosure and of the desired thickness of the coating 25, so that the quantity of liquid product 2 which is admitted into the enclosure compensates for that which is absorbed by the formation of the coating 25 on the objects 3 leaving the enclosure, without a substantial drop in the level of the liquid product 2 in the latter, while preserving the integrity of said liquid product 2.
  • This adjustment of the feed rate of the enclosure is, let us recall , essential as regards the preservation of the integrity of the bath contained in the enclosure with respect to the chemical reactions occurring in contact with the objects 3 and the liquid product 2; this parameter in fact controls in part the rate of renewal of the bath in which it is desired to avoid, in accordance with the teachings of the invention, the formation of precipitated solid residues, for example in the form of iron-zinc salts in the case of galvanization hot (mattes).
  • the two support devices 38 and 41 are at least respectively housed in casings 46 and 47 connected by sections of conduits 48 and 49 to the stripping assembly 37 and to the heating enclosure 39 and by sections of conduits 50 and 51 to said heating enclosure 39 and to the galvanizing enclosure, respectively, and inside which an atmosphere is created protected by injection of a neutral or reducing gas in order to make any oxidation of the products impossible during the different treatment phases.
  • injectors 52 are for example provided for the gas in the casings 46 and 47 and in the wiping device 43.
  • the supply duct 9 of the enclosure is connected to an oven or reservoir 54 and is equipped with a heating device 53 similar to the heating devices 40 and 42.
  • the oven or reservoir 54 has two compartments, namely a melting compartment 55 and a withdrawal compartment 56, separated from the melting compartment 55 by a partition 57 providing a passage between its lower part and the bottom of the reservoir 54 to allow the molten metal to pass from compartment 55 to compartment 56.
  • the top of the molten metal baths contained in each of the two compartments 55 and 56 is under a controlled atmosphere.
  • each of the two compartments 55, 56 is housed by a cover 55 a, 56 a provided with an injector 58, 59 by means of which a neutral or reducing gas may be introduced above the molten metal bath to avoid their oxidation.
  • the heating system of the reservoir 54 is in principle entirely conventional.
  • the melting compartment 55 is equipped with a system 60 allowing metal ingots 61 to be introduced through a sealing airlock, this introduction system 60 being adjusted as a function of the level of the bath in the withdrawal compartment 56.
  • the means for regulating the feed rate of the enclosure consist of an adjustment valve 62, which is inserted in the supply duct 9 between the reservoir 54 and the enclosure.
  • the valve 62 can be of any type used to regulate the flow rate of a flow of molten metal.
  • this valve 62 is constituted by an electromagnetic valve of the type in accordance with French patent application FR-89/07296 already mentioned.
  • the two windings 63 and 64 of this valve 62 are supplied with current from the current source 65, via respective current adjustment devices 66 and 67.
  • Each of the two windings 63 and 64 is arranged and electrically connected in such a way that, when supplied with current, it produces an electromagnetic field sliding in the opposite direction to the direction of flow of the molten metal towards the enclosure, thus creating a magnetomotor force which opposes the flow of the molten metal.
  • the supply pressure of the molten metal is itself kept substantially constant and the flow of molten metal to the enclosure can be regulated by adjusting the intensity of the currents excitation of the windings 63 and 64.
  • the adjustment of the valve 62 can be carried out manually or, in a more sophisticated installation, it is also possible to control the valve 62 to one or more of the operating parameters of the installation, for example at the speed of movement of the objects 3 through the enclosure.
  • the tank 54 is located at a certain distance above the galvanizing enclosure. However, as shown in FIG. 7, the tank 54 can be placed at approximately the same level as the enclosure, the level 68 of the molten metal in the tank 54 being however slightly higher than the highest level that the tank can reach. molten metal inside said enclosure. In this case, the hydrostatic pressure of the molten metal admitted into the enclosure being lower than in the case of FIG. 6, the electric power necessary to regulate the feed rate of the enclosure of molten metal is lower.
  • the level 69 of the molten metal in the withdrawal compartment 56 of the reservoir 54 is lower than the level of the enclosure.
  • the molten metal is discharged towards the enclosure through the supply duct 9 by injecting into the reservoir 54, through the injector 59, an inert gas compressed at a pressure sufficient to raise the level of the molten metal in the duct d brought 9 to the enclosure.
  • the compressed inert gas comes from a source 70 of compressed inert gas, via a pressure adjustment device 71.
  • the supply duct 9 has a calibrated passage section. This can, for example, be obtained by placing a calibrated nozzle in said conduit 9. Under these conditions, the supply flow rate of the enclosure is regulated by means of the pressure adjustment device 71.

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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)
  • Coating With Molten Metal (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Apparatus (AREA)
  • Pens And Brushes (AREA)
  • Formation And Processing Of Food Products (AREA)
  • Road Signs Or Road Markings (AREA)
  • Pretreatment Of Seeds And Plants (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Paints Or Removers (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Foundations (AREA)
  • Packages (AREA)
  • Closures For Containers (AREA)
  • General Preparation And Processing Of Foods (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Devices For Checking Fares Or Tickets At Control Points (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Moulding By Coating Moulds (AREA)
  • Securing Of Glass Panes Or The Like (AREA)
  • Scissors And Nippers (AREA)
EP90401577A 1989-06-09 1990-06-08 System und Vorrichtung zum kontinuierlichen/unterbrochenen Überziehen von Werkstücken durch Eintauchen der Werkstücke in ein Bad aus flüssigem metallischen Überzugsmaterial Expired - Lifetime EP0402270B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR8907697A FR2648155B1 (fr) 1989-06-09 1989-06-09 Procede et installation pour recouvrir d'un revetement des objets de forme allongee par passage desdits objets a travers une masse liquide du produit de revetement
FR8907697 1989-06-09
FR8911344 1989-08-29
FR8911344A FR2651247B1 (fr) 1989-08-29 1989-08-29 Enceinte etanche utilisable pour recouvrir d'un produit a base de metal ou d'alliage metallique des objets continus ou discontinus de forme allongee, defilant a travers elle d'une maniere continue ou intermittente, selon des axes.

Publications (2)

Publication Number Publication Date
EP0402270A1 true EP0402270A1 (de) 1990-12-12
EP0402270B1 EP0402270B1 (de) 1995-08-16

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EP90401577A Expired - Lifetime EP0402270B1 (de) 1989-06-09 1990-06-08 System und Vorrichtung zum kontinuierlichen/unterbrochenen Überziehen von Werkstücken durch Eintauchen der Werkstücke in ein Bad aus flüssigem metallischen Überzugsmaterial

Country Status (32)

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US (1) US5338581A (de)
EP (1) EP0402270B1 (de)
JP (1) JP2919962B2 (de)
KR (1) KR100197184B1 (de)
CN (1) CN1035747C (de)
AT (1) ATE126549T1 (de)
AU (1) AU642655B2 (de)
BG (1) BG95735A (de)
BR (1) BR9007429A (de)
CA (1) CA2062720C (de)
CZ (1) CZ285270B6 (de)
DD (1) DD299419A5 (de)
DE (1) DE69021644T2 (de)
DK (1) DK0402270T3 (de)
DZ (1) DZ1422A1 (de)
EG (1) EG19037A (de)
ES (1) ES2077656T3 (de)
FI (1) FI93976C (de)
HU (1) HU209683B (de)
IE (1) IE80596B1 (de)
LV (1) LV11045B (de)
MA (1) MA21865A1 (de)
NO (1) NO304031B1 (de)
OA (1) OA09410A (de)
PL (1) PL165190B1 (de)
PT (1) PT94323B (de)
RU (1) RU2098196C1 (de)
TN (1) TNSN90077A1 (de)
TR (1) TR26670A (de)
UA (1) UA19871A (de)
WO (1) WO1990015166A1 (de)
YU (1) YU47223B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0477710A1 (de) * 1990-09-28 1992-04-01 Siemens Aktiengesellschaft Flüssigmetall-Durchlaufbeschichtungsanlage
WO1993000453A1 (en) * 1991-06-25 1993-01-07 Allied Tube & Conduit Corporation Flow coat galvanizing
FR2700555A1 (fr) * 1993-01-20 1994-07-22 Delot Process Sa Procédé de dimensionnement d'une enceinte de galvanisation pourvue d'un dispositif d'essuyage magnétique de produits métallurgiques galvanisés.
EP0655518A1 (de) * 1993-11-30 1995-05-31 DANIELI & C. OFFICINE MECCANICHE S.p.A. Verfahren zum Rückleiten von Behandlungsgut bei oberflächen Behandlungen und Fertigbearbeitungen

Families Citing this family (13)

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EP0477710A1 (de) * 1990-09-28 1992-04-01 Siemens Aktiengesellschaft Flüssigmetall-Durchlaufbeschichtungsanlage
WO1993000453A1 (en) * 1991-06-25 1993-01-07 Allied Tube & Conduit Corporation Flow coat galvanizing
FR2700555A1 (fr) * 1993-01-20 1994-07-22 Delot Process Sa Procédé de dimensionnement d'une enceinte de galvanisation pourvue d'un dispositif d'essuyage magnétique de produits métallurgiques galvanisés.
WO1996002684A1 (fr) * 1993-01-20 1996-02-01 Delot Process (S.A.) Procede de dimensionnement d'une enceinte de galvanisation pourvue d'un dispositif d'essuyage magnetique de produits metallurgiques galvanises
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US5510018A (en) * 1993-11-30 1996-04-23 Danieli & C. Officine Meccaniche Spa System to re-circulate treatment material in processes of surface treatment and finishing

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HU905392D0 (en) 1992-04-28
PL165190B1 (pl) 1994-11-30
FI93976B (fi) 1995-03-15
WO1990015166A1 (fr) 1990-12-13
HU209683B (en) 1994-10-28
US5338581A (en) 1994-08-16
DE69021644D1 (de) 1995-09-21
LV11045B (en) 1996-08-20
KR920701502A (ko) 1992-08-11
TR26670A (tr) 1995-03-15
EP0402270B1 (de) 1995-08-16
AU642655B2 (en) 1993-10-28
PT94323A (pt) 1991-02-08
MA21865A1 (fr) 1990-12-31
OA09410A (fr) 1992-09-15
IE80596B1 (en) 1998-10-07
DK0402270T3 (da) 1996-01-15
NO914765D0 (no) 1991-12-04
PL285548A1 (en) 1991-01-14
PT94323B (pt) 1997-05-28
CZ286090A3 (cs) 1999-02-17
NO304031B1 (no) 1998-10-12
YU47223B (sh) 1995-01-31
YU110490A (sh) 1993-10-20
LV11045A (lv) 1996-02-20
ES2077656T3 (es) 1995-12-01
IE902036A1 (en) 1991-01-02
BR9007429A (pt) 1992-06-16
AU5925890A (en) 1991-01-07
EG19037A (en) 1995-03-30
NO914765L (no) 1991-12-04
DZ1422A1 (fr) 2004-09-13
UA19871A (uk) 1997-12-25
CA2062720C (fr) 1999-08-10
HUT59965A (en) 1992-07-28
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IE902036L (en) 1990-12-09
RU2098196C1 (ru) 1997-12-10
CA2062720A1 (fr) 1990-12-10
DD299419A5 (de) 1992-04-16
KR100197184B1 (ko) 1999-06-15
DE69021644T2 (de) 1996-04-25
BG95735A (bg) 1993-12-24
JPH05503315A (ja) 1993-06-03
JP2919962B2 (ja) 1999-07-19
CN1035747C (zh) 1997-09-03
FI93976C (fi) 1995-06-26
FI915778A0 (fi) 1991-12-09
CZ285270B6 (cs) 1999-06-16
ATE126549T1 (de) 1995-09-15

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