EP1518004B1 - Utilisation de gaz de separation lors de la finition en continue de metaux par immersion a chaud - Google Patents

Utilisation de gaz de separation lors de la finition en continue de metaux par immersion a chaud Download PDF

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Publication number
EP1518004B1
EP1518004B1 EP03714895A EP03714895A EP1518004B1 EP 1518004 B1 EP1518004 B1 EP 1518004B1 EP 03714895 A EP03714895 A EP 03714895A EP 03714895 A EP03714895 A EP 03714895A EP 1518004 B1 EP1518004 B1 EP 1518004B1
Authority
EP
European Patent Office
Prior art keywords
zinc
gas
nitrogen
hot dip
sulphur
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 - Lifetime
Application number
EP03714895A
Other languages
German (de)
English (en)
Other versions
EP1518004A1 (fr
Inventor
Walter Trakowski
Rolf Brisberger
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.)
SMS Siemag AG
Original Assignee
SMS Demag AG
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 DE10233343A external-priority patent/DE10233343A1/de
Application filed by SMS Demag AG filed Critical SMS Demag AG
Priority to SI200331126T priority Critical patent/SI1518004T1/sl
Publication of EP1518004A1 publication Critical patent/EP1518004A1/fr
Application granted granted Critical
Publication of EP1518004B1 publication Critical patent/EP1518004B1/fr
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
    • 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
    • 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
    • C23C2/0038—Apparatus characterised by the pre-treatment chambers located immediately upstream of the bath or occurring locally before the dipping process
    • C23C2/004—Snouts
    • 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

Definitions

  • the invention relates to a method for suppressing the zinc evaporation in the hot dip coating of a steel strip with zinc or zinc alloys.
  • the document DE 44 00 886 C2 describes a method for suppressing the zinc evaporation in the hot dip coating of a steel strip with zinc or zinc alloys, wherein the steel strip is in an inlet region under a protective gas atmosphere of a mixture of an inert gas with hydrogen and / or carbon monoxide as reducing gases and additionally carbon dioxide.
  • the protective gas atmosphere should contain up to 20 percent by volume of hydrogen and up to 10 percent by volume of carbon monoxide, or it should be added to the inert gas atmosphere 0.05 to 8 percent by volume of Co 2 .
  • EP 0 172 681 B1 discloses a method for suppressing the development of zinc fumes in a continuous process for hot dip coating an iron-based metal strip with zinc or zinc alloys, in which the strip is enclosed in an inlet region. Water vapor is introduced into this inlet region to maintain an atmosphere which oxidizes the zinc vapors but does not oxidize the iron band and which contains at least 264 ppm of water vapor and at least 1% by volume of hydrogen.
  • the atmosphere within the inlet region should contain 1 to 8 percent by volume of hydrogen and 300-4500 percent by volume of water vapor, the adjustment being carried out with an inert gas, for example nitrogen.
  • the US 6,224,692 B1 discloses a method and apparatus for electroplating a metal strip.
  • the metal strip is passed into a bath of liquid zinc or a liquid zinc alloy after it has previously been exposed to a hydrogen or inert gas atmosphere to remove any residual oxides present on the surface of the metal strip.
  • the document US 4,862,825 describes a stripping process for a metal strip after it has passed through a zinc bath. After leaving the zinc bath, the metal strip is blown with a non-oxidizing gas intended to prevent the oxidation of the still fresh zinc coating on the metal strip.
  • the gas used is preferably sulfur hexafluoride SF 6 .
  • the Japanese publication JP 07180014 discloses a method for suppressing evaporation of zinc on the surface of a zinc dipping bath for galvanizing a metal strip.
  • the surface is provided of the immersion bath by applying gaseous nitrogen to 420 ° C to 440 ° C to cool. This advantageously leads to the fact that the zinc no longer evaporates on the surface of the immersion bath and that the metal strip after passing through the zinc bath has a zinc coating with a very good surface.
  • Japanese pamphlet JP-A-279 730 a process for hot-dip galvanizing a metal strip with suppressed zinc bath oxidation in the area of Badeintritts.
  • the zinc oxidation is suppressed by introducing inert gas having a density> 2 kg / m 2 into a furnace trunk through which the metal strip is introduced into the zinc bath.
  • the inert gas is one or at least two of the following inert gases xenon, krypton, radon or sulfur hexafluoride. These inert gases are mainly used to prevent zinc oxidation.
  • the reduction of zinc evaporation is only a side effect.
  • Xenon is a very expensive gas and therefore can not be used for industrial mass production.
  • the present invention seeks to provide an alternative separation gas for suppressing zinc evaporation in the hot dip coating of a metal strip with zinc or with a zinc alloy.
  • the invention is shown schematically in a figure 1. It can be seen from the drawing that the claimed gas mixture is used in such a way that during normal operation no large amounts of gas are required for injection into the furnace trunk 1.
  • the furnace trunk 1 Into the metal bath 2 located in the container 6, the furnace trunk 1, through which the metal strip 3 to be coated is inserted, emerges obliquely.
  • the metal strip 3 dips into the metal or coating bath 2, is deflected by the deflection roller 7 and exits at 8 from the metal bath. Above the exit point scraper nozzles 9 are arranged.
  • a separating gas layer of the claimed gas mixture between the surface of the metal bath 2 and a gas mixture 5 commonly used in the furnace trunk, consisting of nitrogen and hydrogen. With the use of a separating gas, the zinc sublimation in the continuous hot dipping refinement is at least largely reduced or completely avoided.

Landscapes

  • 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)
  • Materials For Medical Uses (AREA)
  • Detergent Compositions (AREA)

Claims (1)

  1. Procédé pour supprimer l'évaporation du zinc lors d'un revêtement par immersion dans une masse fondue d'une bande d'acier (3) par du zinc ou des alliages de zinc, la bande d'acier (3) étant guidée dans une trompe de four (1) plongée dans le bain métallique (2) et déviée dans le bain métallique (2) par une poulie de déviation (7) et ressortant ensuite vers le haut du bain métallique (2),
    un mélange gazeux se trouvant en tant que gaz de séparation (4) dans la trompe de four (1) au-dessus du bain métallique (2), caractérisé
    en ce qu'on utilise comme mélange gazeux de l'argon avec des additions de butane et/ou de propane.
EP03714895A 2002-06-28 2003-03-28 Utilisation de gaz de separation lors de la finition en continue de metaux par immersion a chaud Expired - Lifetime EP1518004B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200331126T SI1518004T1 (sl) 2002-06-28 2003-03-28 Uporaba locevalnega plina pri kontinuiranem oplemenitenju kovin z vrocim omakanjem

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10229203 2002-06-28
DE10229203 2002-06-28
DE10233343 2002-07-23
DE10233343A DE10233343A1 (de) 2002-06-28 2002-07-23 Trenngaseinsatz bei der kontinuierlichen Schmelztauchveredelung
PCT/EP2003/003219 WO2004003250A1 (fr) 2002-06-28 2003-03-28 Utilisation de gaz de separation lors de la finition en continue de metaux par immersion a chaud

Publications (2)

Publication Number Publication Date
EP1518004A1 EP1518004A1 (fr) 2005-03-30
EP1518004B1 true EP1518004B1 (fr) 2007-12-26

Family

ID=30001492

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03714895A Expired - Lifetime EP1518004B1 (fr) 2002-06-28 2003-03-28 Utilisation de gaz de separation lors de la finition en continue de metaux par immersion a chaud

Country Status (13)

Country Link
US (1) US20050233088A1 (fr)
EP (1) EP1518004B1 (fr)
JP (1) JP2005539136A (fr)
CN (1) CN100422378C (fr)
AT (1) ATE382104T1 (fr)
AU (1) AU2003219109B2 (fr)
BR (1) BR0311470A (fr)
DE (1) DE50308889D1 (fr)
ES (1) ES2297143T3 (fr)
MX (1) MXPA04012328A (fr)
PL (1) PL206283B1 (fr)
RU (1) RU2319786C2 (fr)
WO (1) WO2004003250A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013101131A1 (de) * 2013-02-05 2014-08-07 Thyssenkrupp Steel Europe Ag Vorrichtung zum Schmelztauchbeschichten von Metallband
US9956576B2 (en) * 2014-04-22 2018-05-01 Metokote Corporation Zinc rich coating process
CN110639233B (zh) * 2019-08-20 2021-12-07 中船重工（邯郸）派瑞特种气体有限公司 一种去除三氟化氮中二氟二氮、四氟二氮的方法

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE617024C (de) * 1929-06-12 1935-08-10 Karl Daeves Dr Ing Verfahren zur Verhinderung der Bildung weissen Rostes bei verzinkten Waren
AU421751B2 (en) * 1968-03-08 1972-02-25 Australian Wire Industries Pty, Ltd Improved method of and apparatus for wiping galvanised wire or strip
NZ188953A (en) * 1977-12-15 1982-12-21 Australian Wire Ind Pty Coating control of wire emerging from metal bath
GB2050432B (en) * 1979-05-09 1983-12-21 Boc Ltd Use of liquefied gas in hot dip metal coating
US4339480A (en) * 1980-04-11 1982-07-13 Bethlehem Steel Corporation Gas wiping apparatus and method of using
US4557953A (en) * 1984-07-30 1985-12-10 Armco Inc. Process for controlling snout zinc vapor in a hot dip zinc based coating on a ferrous base metal strip
DE3631893A1 (de) * 1986-09-19 1988-03-31 Paul Fontaine Verfahren und vorrichtung zum abstreifen von mit schmelzfluessigem material beschichtetem blech
CN1054622A (zh) * 1991-04-24 1991-09-18 文联煜 氮基保护气氛制气剂
JPH07180014A (ja) * 1993-12-22 1995-07-18 Nippon Steel Corp 溶融金属めっきのスナウト内浴面からのＺｎ蒸発抑制方法
JPH11279730A (ja) * 1998-03-27 1999-10-12 Nisshin Steel Co Ltd Ｚｎの酸化を抑制した溶融めっき方法
FR2782326B1 (fr) * 1998-08-13 2000-09-15 Air Liquide Procede de galvanisation d'une bande metallique
US7129311B2 (en) * 2002-09-18 2006-10-31 Arch Specialty Chemicals, Inc. Additives to prevent degradation of alkyl-hydrogen siloxanes
JP4243209B2 (ja) * 2003-03-28 2009-03-25 富士フイルム株式会社 絶縁膜形成材料及びそれを用いた絶縁膜

Also Published As

Publication number Publication date
ATE382104T1 (de) 2008-01-15
US20050233088A1 (en) 2005-10-20
AU2003219109B2 (en) 2009-01-22
EP1518004A1 (fr) 2005-03-30
CN1665954A (zh) 2005-09-07
RU2319786C2 (ru) 2008-03-20
DE50308889D1 (de) 2008-02-07
MXPA04012328A (es) 2005-04-08
RU2005102086A (ru) 2005-07-20
PL206283B1 (pl) 2010-07-30
AU2003219109A1 (en) 2004-01-19
ES2297143T3 (es) 2008-05-01
BR0311470A (pt) 2005-03-15
JP2005539136A (ja) 2005-12-22
PL372068A1 (en) 2005-07-11
CN100422378C (zh) 2008-10-01
WO2004003250A1 (fr) 2004-01-08

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