EP2514849A1 - Verfahren und Vorrichtung zur Galvanisierung eines länglichen Objekts - Google Patents

Verfahren und Vorrichtung zur Galvanisierung eines länglichen Objekts Download PDF

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Publication number
EP2514849A1
EP2514849A1 EP12002824A EP12002824A EP2514849A1 EP 2514849 A1 EP2514849 A1 EP 2514849A1 EP 12002824 A EP12002824 A EP 12002824A EP 12002824 A EP12002824 A EP 12002824A EP 2514849 A1 EP2514849 A1 EP 2514849A1
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EP
European Patent Office
Prior art keywords
nitrogen
volume
pipe
nozzle
gaseous
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
EP12002824A
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English (en)
French (fr)
Other versions
EP2514849B1 (de
Inventor
Maximus Akuh
Werner Dieter Langkabel
Guido Plicht
Zbigniew Zurecki
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Air Products and Chemicals Inc
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Air Products and Chemicals Inc
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Publication of EP2514849A1 publication Critical patent/EP2514849A1/de
Application granted granted Critical
Publication of EP2514849B1 publication Critical patent/EP2514849B1/de
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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
    • 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
    • C23C2/261—After-treatment in a gas atmosphere, e.g. inert or reducing atmosphere
    • 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

  • Described herein are a method, apparatus, and system for galvanizing an object. More specifically, described herein is a method, apparatus, or rod for galvanizing an elongated object (e.g., an object having a relatively long length compared to width or diameter) such as, but not limited to, a metal strip, wire, rod, or tube.
  • an elongated object e.g., an object having a relatively long length compared to width or diameter
  • a metal strip, wire, rod, or tube such as, but not limited to, a metal strip, wire, rod, or tube.
  • Galvanizing is a process for applying a protective zinc coating over an iron or a steel object to reduce corrosion which aids in extending the useful life of the object.
  • Corrosion is a physical and chemical deterioration of a material due to reaction with its environment, particularly oxygen.
  • Corrosion resistance can be defined as the ability of the material to resist oxidation.
  • Galvanizing is important to the life duration of an object that is subject to deterioration caused by the surrounding environment.
  • the process of galvanizing consists of coating metals, such as iron and steel, with a thin protective layer of zinc.
  • the layer of zinc provides protection to the metal from corrosion.
  • the protective layer of zinc prevents the ferrous material from coming in contact with oxygen causing oxidation.
  • the layer of zinc already has a naturally occurring zinc oxide film which protects the zinc layer against corrosion thereby making it corrosion resistant.
  • hot dip zinc galvanizing can be run as a continuous process wherein the object starts as a raw material and ends as a finished good.
  • stationary hot dip zinc galvanizing the individual objects are dipped into a zinc bath and then removed.
  • a typical hot dip zinc galvanizing process may involved one or more of the following process steps: cleaning, pickling, pre fluxing, galvanizing, cooling, finishing, and inspecting, while the product is rinsed and air blown at various times throughout the process.
  • cleaning step surface residues such as oil, grease, paints, etc. are typically removed with a hot alkaline cleaner such as a lead bath or hot soapy water.
  • the object is then rinsed to remove the cleaning residue and/or an air knife may be used to remove additional water and/or excess residue prior to pickling.
  • a bath of diluted hydrochloric or sulfuric acid is used to remove surface rust or mill scale and provide a chemically clean metallic surface.
  • An intermittent rinse and/or air knife step may be used to dilute the acid concentration and/or remove residue that may be left on the object prior to the pre-fluxing step.
  • the object is immersed into a liquid flux to remove oxides and prevent oxidation prior to the galvanizing step.
  • a liquid flux used in this step is zinc ammonium chloride solution which aids in the ability of the zinc to adhere to the surface of the object.
  • the galvanizing step the object is immersed in or passed through a bath of molten zinc at a temperature which may range, for example, from about 437.5°C to about 455°C.
  • the molten zinc adheres to the surface of the object to provide a layer, the gauge of which is determined by the length of time the object is contacted with the molten zinc.
  • the object is finished and cooled. During the finishing step, excess zinc is typically removed by draining, centrifuging, and/or wiping the object. During a portion of, or directly after the finishing step, the object is rapidly cooled typically using chiller units and/or high pressure air knives using nitrogen.
  • the galvanized object is then inspected to ensure that it meets one or more of the following criteria: tensile strength, yield strength, hardness, elongation, stress/strain, form/condition/ thermal conductivity, electrical resistance, coating weight and/or gauge, appearance, and combinations thereof.
  • tensile strength yield strength
  • hardness hardness
  • elongation stress/strain
  • form/condition/ thermal conductivity electrical resistance
  • coating weight and/or gauge appearance, and combinations thereof.
  • appearance the object may be inspected to look for one or more of the following (which can be undesirable depending upon the application): dull gray color, rust stains, blisters, roughness, excessive thickness, lumpiness and runs, pimples, bare spots, and/or wet storage stains and bulky white deposits.
  • the galvanizing process particularly for an elongated object such as a wire or tube, further provides one or more of the following desired objectives: a spherical and homogenous surface coating, a brighter surface finish, controllability of the coating thickness or gauge, a higher production speed or through put, and/or a reduction in the amount of zinc used in the process. It is desirable that the surface of the metal object, particularly a wire or tube, obtains a spherical and homogenous surface coating.
  • issues typically encountered relate to roundness and homogenous coverage of the coated surface of rods and wires, especially for horizontal coating systems.
  • a homogeneous coating is necessary to get the same wire properties (i.e. corrosion resistance, diameter, etc.) at all points. It is desirable that the surface finish be bright and shiny in appearance. Control of coating thickness is desirable to the end user. In this regard, different coating thicknesses are desired for different applications with galvanized wires and rods. It is desirable that the galvanizing method allow for higher production speeds and through put. Lastly, there is a need in the art for saving or reusing the zinc during the coating step to reduce overall production costs.
  • the method, apparatus, and system described herein satisfy one or more of the foregoing objectives in the following manner.
  • the method and apparatus described herein compared to prior art methods involving air cooling, can provide a bright zinc surface finish that is achieved due to less oxidation of the surface at high temperature.
  • the method and apparatus described herein provide a flexible wiping system to adjust the desired zinc coating thickness.
  • the method and apparatus described herein may enhance productivity by improving the cooling of the elongated object such as the wire, rod or tube and the preheating temperature can also be reduced while good results are still obtained. Further, the method and apparatus described herein may reduce the cost of the zinc used by stripping surplus zinc from the wire or rod via the nozzle so that the surplus zinc can then be collected and reused if desired.
  • a method for processing an elongated object comprising a molten coating comprising: passing a the elongated object through a nozzle configured to direct gaseous nitrogen at the surface of the object and remove excess coating from the object; and passing the elongated object through a concept pipe configured to rapidly cool the elongated object and solidify the coating; wherein the nozzle comprises a nozzle opening; an inner chamber defining a first volume wherein the elongated object passes therethrough; an outer chamber defining a second volume that is in fluid communication with a nitrogen source wherein gaseous nitrogen passes through the second volume at a pressure and a temperature and exits proximal to the nozzle opening and contacts the elongated object; and wherein the concept pipe comprises an porous inner chamber defining a third volume; an outer chamber defining a fourth volume wherein the fourth volume is in fluid communication with one or more inputs for a nitrogen mixture comprising gaseous and liquid nitrogen; and a temperature sensor to monitor a temperature of the nitrogen
  • Figure 1 is a side view of a nozzle that can be used with the apparatus and method described herein.
  • Figure 2 is a side view of a concept pipe that can be used to inject gaseous nitrogen, liquid nitrogen, or a combination thereof to the object.
  • Figure 3 is a schematic drawing of the system described herein for galvanizing an elongated object comprising a nozzle and concept pipe described herein.
  • FIG. 4 is another embodiment of the system described herein.
  • the present method and apparatus combines the benefits of the use of both gaseous nitrogen (GAN) and cryogenic liquid nitrogen (LIN) to remove or wipe excess molten zinc (Zn) from the surface of an elongated object such as a wire surface in the following manner.
  • GAN gaseous nitrogen
  • LIN cryogenic liquid nitrogen
  • Zn molten zinc
  • the method and apparatus described herein address these contradicting requirements by wiping (shearing off) excess molten metal, e.g. zinc, with a room-temperature gas and then chilling the thinner zinc coating in a subsequent production step. Further, the method and apparatus described herein may, in certain embodiments, allow for the control of zinc coating thickness not just by adjusting the aperture of the frontal (wiping) opening of the apparatus but, optionally, by controlling the gas temperature.
  • the method and apparatus fulfills another challenging requirement in the field of wire wiping through the use of gas dynamics-based retention of the axial position of the wire during its travel through the atomizing and chilling sections of the wire wiping apparatus.
  • Galvanized wires tend to vibrate, and if the wire accidentally touches the internal diameter surface of the apparatus, the final product may not be usable.
  • the apparatus described herein uses one or more of the following aspects: a perfectly cylindrically-symmetrical gas aperture around the wire, a microporous pipe wall around the wire that assures the axial position of the wire, and/or any other gas apertures around the wire that mimic a concentric gas discharge pattern.
  • the dynamic pressure of the discharged gas suspends the wire in the axial position and minimizes the risk of contact between the wire and the apparatus that would lead to product rejection. Consequently, the method and apparatus described herein, in certain embodiments, can be operated in a horizontal position as well as in the more commonly used vertical position. In this manner, end-users may experience a new degree of freedom in reconfiguring their wire galvanizing systems without further concerns about the gravity force acting on wiped wires.
  • Figure 1 provides a side view of the nozzle 100 that can be used with the galvanizing method, apparatus, or system described herein.
  • Figure 2 provides a side view of a concept pipe 200 that can be used with the galvanizing method, apparatus, or system described herein.
  • the nozzle and concept pipe as depicted in Figures 1 and 2 are fastened together as shown in Figure 3 using a nozzle fixing plate 180. In other embodiments, however, the nozzle 100 and concept pipe 200 can be detached.
  • the apparatus is operated in a horizontal, continuous process.
  • the nozzle 100, the concept pipe 200, or both the nozzle 100 and the concept pipe 200 can be operated in a vertical, continuous process.
  • An elongated object such as a wire, rod, or tube is passed through the inner nozzle chamber 160 and inner concept pipe chamber 210 in the direction shown by the arrows.
  • an elongated object such as a wire or rod (not shown) is preheated prior to entering a zinc bath (also not shown).
  • the object is passed through the nozzle 100 via an opening 110 where an adjustable gaseous nitrogen (GAN) knife flows through a nozzle split opening 170.
  • GAN adjustable gaseous nitrogen
  • the nozzle 100 has a spherical cross-section and in the side view depicted has a slanting edge 190 proximal to the nozzle opening 110 that allows for the excess zinc coating to be deflected away from the object or wire.
  • GAN flows into the nozzle 100 via outer nozzle chamber 150 and passes out through the nozzle split opening 170 at the front of the nozzle 100.
  • Gaseous nitrogen is pressurized at an external source (not shown in Figure 1 ) and enters into outer nozzle chamber 150 through one or more inputs 140, wherein its pressure is homogenized.
  • the GAN then passes through the split opening 170 of the nozzle 100, exerting a uniform force upon the coated surface of the elongated object.
  • the flow rate and pressure of the gaseous nitrogen may range from about 5 to about 30 m 3 /h.
  • the pressured gaseous nitrogen forms a GAN knife that acts to remove the surplus zinc from the coating of the galvanized object as it passes through the nozzle opening 110.
  • the pressure force presses the molten zinc on to the wire/rod, distributing it uniformly on the surface area and stripping off any surplus zinc on the wire/rod, leaving an even, spherical coating on the objects' surface.
  • the elongated object such as a wire (not shown) is passed through the nozzle 100 through the nozzle opening 110 in the direction indicated by the arrow in Figure 1 .
  • the nozzle 100 shown in Figure 1 is comprised of the following elements: an inner nozzle enclosure 120 that defines an inner nozzle chamber 160 through which an elongated object such as a wire passes and an outer nozzle body enclosure 130 whose interior walls define an outer nozzle chamber 150 that allows for the flow of a pressurized fluid such as gaseous nitrogen into outer nozzle chamber 150 through one or more inputs 140 and out through a split opening 170.
  • Split opening 170 has a length shown in Figure 1 as "dx".
  • the length "dx" of the split opening 170 can be varied from about zero to about 12 mm, such as from about 0.01 to about 12 mm, or greater if required, to adjust the zinc coating on the surface of the elongated object to the desired thickness or gauge.
  • the desired thickness of the zinc coating can be then set by selecting the value "dx" of the split opening 170 on the nozzle 100.
  • the length "dx" of the split opening is set by turning the outer nozzle body enclosure 130 clockwise for a larger split opening "dx" and counter clockwise for a smaller split opening of "dx".
  • an additional advantage of the nozzle 100 shown in Figure 1 is that it may allow for higher throughput.
  • One of the bottlenecks in the galvanizing process is the time it takes to pre-heat the zinc to the required temperature.
  • the nozzle improves upon the cooling speed since a uniform pressure force is exerted on the molten coating as it is passed therethrough which allows for a more uniform zinc coating. Because a more uniform coating is obtained, it may allow the end-user to lower the preheating temperature and/or reduce the dwelling time in the zinc bath during the galvanizing step.
  • Figure 2 provides a side view of a concept pipe 200 that can be used with the method and system described herein.
  • Concept pipe 200 is comprised of an inner concept pipe chamber 210 which is in fluid communication with one or more multiple liquid nitrogen (LIN) and/or gaseous nitrogen (GAN) inputs 220, a porous inner pipe 230, and an outer concept pipe 250 whose interior sidewalls define an outer concept pipe chamber 240.
  • LIN liquid nitrogen
  • GAN gaseous nitrogen
  • both inner chamber 210 and outer chamber 240 contain a mixture of LIN and GAN which is provided from a blending pipe (shown in Figure 4 ).
  • the temperature is measured and maintained at the desired level using a thermocouple 260 which is in electrical communication with a programmable logic controller (PLC) or temperature and electronic control panel (shown in Figures 4 and 5 ).
  • PLC programmable logic controller
  • the concept pipe 200 allows the elongated object passing therethrough to be "shock cooled," i.e. cooled very rapidly such that the molten zinc solidifies immediately or almost immediately.
  • the inert atmosphere in inner chamber 210 of the concept pipe 200 keeps the surface of the elongated object passing therethrough oxide free, giving it a commercially desirable bright finish.
  • Productivity is boosted by pre-cooling the elongated object in concept pipe 200, enhancing cooling speed.
  • Figure 3 depicts an apparatus in which the nozzle 100 and the concept pipe 200 are attached via nozzle fixing plate 180.
  • the object being galvanized passes through nozzle 100, where the molten coating on the object is reduced to a specific desired thickness.
  • the object then continues into the concept pipe 200, where the molten coating rapidly solidifies as a result of the drop in temperature due to the LIN/GAN atmosphere in the inner chamber 210 of the concept pipe 200.
  • the temperature in the inner chamber 210 may range from about -50°C to about -150°C, and will depend on the thickness of the zinc coating. In embodiments where a thicker coating or gauge is desired, a lower temperature may also be desired.
  • the desired temperature is obtained by mixing LIN, typically at about -196°C, with GAN at ambient temperature in a blending pipe. This is done by measuring the temperature in the inner chamber 210 or the concept pipe 200 at a thermocouple 260 and adding LIN to a GAN flow in a blending pipe (shown in Figure 4 ) which then flows into the concept pipe via one or more LIN/GAN inputs 220.
  • Figure 4 provides a view of the method and system described herein which includes a blending pipe 410.
  • the blending pipe 410, electrical panel or programmable logic controller (PLC) 460 and LIN and GAN supplies aid in mixing of LIN & GAN at the blending pipe 410 to achieve the desired solidification energy in the concept pipe 200.
  • Mixing of the LIN and GAN is controlled by the PLC 460 with input temperature measurement from the concept pipe 200 or thermocouple 260 shown in Figure 2 .
  • the PLC 460 controls the temperature in the concept pipe by tacking LIN (opening and closing the solenoid valve 470 in the LIN pipeline) into the blending pipe 410 (where the LIN is mixed with GAN via one or more conduits or openings 420) to achieve the set temperature.
  • the mixed LIN and GAN at the set temperature then flow to the concept pipe 200 via mixed nitrogen line 440.
  • the desired temperature in the concept pipe 200 is achieved by opening and closing of the solenoid/proportional valve 470 on the LIN supply line controlled by the PLC 460.
  • the GAN supply to the nozzle for wiping the surplus zinc and maintaining the set thickness of the coating on the wire/rod can also optionally be controlled by the PLC 460 (not shown).
  • the pressure and temperature of the mixed nitrogen line may be monitored via optional pressure and temperature sensors 430 and 450, respectively.
  • Figure 5 provides another embodiment of an apparatus and system 500 as described herein.
  • the nozzle 100 and concept pipe 200 are combined into an integrated unit.
  • the front portion of the combined nozzle and concept pipe strips surplus molten zinc from an elongated object and the desired coating thickness on the object is set by adjusting the split opening of the nozzle as described above.
  • the surplus or excess zinc may be collected and reused in the molten zinc bath as shown.
  • the coated object goes through the concept pipe 200 wherein the molten zinc coating instantly solidifies, leaving a uniform and spherical coating on the surface of the wire/rod.
  • the combined LIN/GAN atmosphere in the concept pipe 200 also keeps the coating oxide free, giving it a bright finish.
  • the temperature of the concept pipe is regulated by a PLC 460, keeping it constant by opening and closing the solenoid/proportional valve 470 on the LIN line in response to changes in the temperature input and the temperature measurement from thermocouple 260 in the concept pipe 200.
  • the pressure of the inner chamber of the concept pipe 200 is kept low by using porous inner separating pipes. This also provides a uniform pressure distribution in the inner chamber of the concept pipe.
  • the process may be optionally also be monitored through one or more additional thermocouples located in various points through the process. In the embodiment shown in Figure 5 , the thermocouple 260 monitors the temperature as the object passes through the concept pipe.
  • An optional temperature sensor 520 and electromagnetic thickness sensor 510 may be also employed to further regulate the process.
  • the PLC may also adjust the flow of GAN to the process by opening and closing optional valve 530 on the GAN line.

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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)
  • Manufacture And Refinement Of Metals (AREA)
EP12002824.6A 2011-04-21 2012-04-23 Verfahren und Vorrichtung zur Galvanisierung eines länglichen Objekts Active EP2514849B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201161477842P 2011-04-21 2011-04-21
US13/447,451 US20130224385A1 (en) 2011-04-21 2012-04-16 Method and Apparatus for Galvanizing an Elongated Object

Publications (2)

Publication Number Publication Date
EP2514849A1 true EP2514849A1 (de) 2012-10-24
EP2514849B1 EP2514849B1 (de) 2013-08-07

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EP12002824.6A Active EP2514849B1 (de) 2011-04-21 2012-04-23 Verfahren und Vorrichtung zur Galvanisierung eines länglichen Objekts

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US (1) US20130224385A1 (de)
EP (1) EP2514849B1 (de)
CN (1) CN102758165B (de)
TW (1) TWI496622B (de)

Cited By (1)

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CN111118426A (zh) * 2018-10-31 2020-05-08 宝山钢铁股份有限公司 一种锌锅排渣结构及方法

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
CN112481571B (zh) * 2020-10-14 2022-12-23 唐山市融德冷轧镀锌有限公司 一种热镀锌工艺

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EP0004545A1 (de) * 1978-04-10 1979-10-17 Messer Griesheim Gmbh Verfahren und Vorrichtung zum Verzinken von Draht
EP0113090A2 (de) * 1982-12-24 1984-07-11 Sumitomo Electric Industries Limited Verfahren zum Überziehen durch heisses Eintauchen
DE19652686A1 (de) * 1996-12-18 1998-06-25 Gunter Prof Dr Ing Riedel Einrichtung zum definierten Abstreifen von Überzugsmaterial
EP2045349A1 (de) * 2007-10-05 2009-04-08 Linde Aktiengesellschaft Vorrichtung und Verfahren zur durchgehenden feuerverzinkten Beschichtung von Metallstreifen
EP2166124A1 (de) * 2008-09-12 2010-03-24 Linde AG Verfahren und Vorrichtung zur kontinuierlichen Schmelztauchbeschichtung von Metallbändern

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AU618839B2 (en) * 1988-09-13 1992-01-09 Australian Wire Industries Pty Ltd Jet wiping apparatus
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US8474273B2 (en) * 2009-10-29 2013-07-02 Air Products And Chemicals, Inc. Apparatus and method for providing a temperature-controlled gas

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0004545A1 (de) * 1978-04-10 1979-10-17 Messer Griesheim Gmbh Verfahren und Vorrichtung zum Verzinken von Draht
EP0113090A2 (de) * 1982-12-24 1984-07-11 Sumitomo Electric Industries Limited Verfahren zum Überziehen durch heisses Eintauchen
DE19652686A1 (de) * 1996-12-18 1998-06-25 Gunter Prof Dr Ing Riedel Einrichtung zum definierten Abstreifen von Überzugsmaterial
EP2045349A1 (de) * 2007-10-05 2009-04-08 Linde Aktiengesellschaft Vorrichtung und Verfahren zur durchgehenden feuerverzinkten Beschichtung von Metallstreifen
EP2166124A1 (de) * 2008-09-12 2010-03-24 Linde AG Verfahren und Vorrichtung zur kontinuierlichen Schmelztauchbeschichtung von Metallbändern

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111118426A (zh) * 2018-10-31 2020-05-08 宝山钢铁股份有限公司 一种锌锅排渣结构及方法
CN111118426B (zh) * 2018-10-31 2021-10-22 宝山钢铁股份有限公司 一种锌锅排渣结构及方法

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CN102758165A (zh) 2012-10-31
TW201242676A (en) 2012-11-01
US20130224385A1 (en) 2013-08-29
TWI496622B (zh) 2015-08-21
EP2514849B1 (de) 2013-08-07
CN102758165B (zh) 2014-10-08

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