WO1985004427A1 - Procede de galvanisation pour produire consecutivement deux revetements differents sur une bande metallique - Google Patents

Procede de galvanisation pour produire consecutivement deux revetements differents sur une bande metallique Download PDF

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Publication number
WO1985004427A1
WO1985004427A1 PCT/FR1984/000176 FR8400176W WO8504427A1 WO 1985004427 A1 WO1985004427 A1 WO 1985004427A1 FR 8400176 W FR8400176 W FR 8400176W WO 8504427 A1 WO8504427 A1 WO 8504427A1
Authority
WO
WIPO (PCT)
Prior art keywords
tank
bath
fixed
removable
alloy
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.)
Ceased
Application number
PCT/FR1984/000176
Other languages
English (en)
French (fr)
Inventor
Guy Gerard
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.)
Fabrique de Fer de Maubeuge
Original Assignee
Fabrique de Fer de Maubeuge
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
Application filed by Fabrique de Fer de Maubeuge filed Critical Fabrique de Fer de Maubeuge
Priority to BR8407306A priority Critical patent/BR8407306A/pt
Priority to IN645/DEL/84A priority patent/IN160743B/en
Publication of WO1985004427A1 publication Critical patent/WO1985004427A1/fr
Priority to FI854696A priority patent/FI78323C/fi
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • C23C2/003—Apparatus
    • C23C2/0034—Details related to elements immersed in bath
    • 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
    • C23C2/0036—Crucibles
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/06—Zinc or cadmium or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/50—Controlling or regulating the coating processes

Definitions

  • the coating of a metal strip with a zinc alloy is carried out today by means of an installation called a galvanizing line along which the strip runs and undergoes various treatments.
  • a galvanizing line along which the strip runs and undergoes various treatments.
  • a cleaning station there is successively a cleaning station, a preheating station with or without atmosphere control, a so-called laboratory station where generally the heating of the strip continues in a very reducing atmosphere, possibly a cooling station to finally arrive in a bath of molten zinc alloy.
  • the strip On leaving the bath, the strip is drained and cooled to be either wound up or carried through subsequent treatment stations (such as, for example, heat treatment or surface treatment stations, etc.).
  • the invention intends to propose another solution for the production, on the same galvanizing line, of two different products, that is to say coated with different alloys, successively, by means of a galvanizing process.
  • the provisions of the invention advantageously allow a change of bath with a minimum of handling of molten metal, a maximum of safety in particular for the temperature-maintaining device and finally in a relatively short time, that is to say without impact. appreciable on the production capacity and therefore on the cost price of the finished product.
  • the object of the invention is a process for producing consecutively on a single production line at least two sheet metal products coated with different metal alloys, the production line comprising in particular a fixed tank of molten alloy in which the metal foil scrolls.
  • this method consists, in order to pass from the first to the second product, in placing in the bath of said fixed tank, a removable tank of lower volume containing one of the aforesaid alloys different from that contained in the fixed tank, to maintain the temperature of the bath of the removable tank by regulating the temperature of the bath of the fixed tank and to scrolling said metal sheet through the bath of the removable tank, and, to switch from the second to the first product, removing said removable tank, the metal sheet then moving through the fixed tank. It is advantageous, in this process, to constitute at least one bath starter in the removable tank before the installation of this tank in the bath of the fixed tank.
  • One of the phases of the process resides in the fact that, prior to the installation of the removable tank, the fixed tank is partially emptied and then, after this installation, the two baths are completed to an identical level.
  • FIG. 1 is a schematic sectional view of a known galvanizing installation in the zone of the molten alloy bath
  • FIG. 1 illustrates by the same schematic section an installation for implementing the method according to the invention.
  • a portion of the galvanizing line can be seen at the level of the bath of molten zinc alloy.
  • This bath 1 is contained in a fixed tank 2 which has heat supply elements known in themselves and not shown, such as inductors.
  • the means for guiding the metal strip 3 in the bath 1 during its circulation in direction A consist of a return roller 4 immersed in this bath through which the strip passes from its plunging path to its substantially vertical extraction path. This guidance is completed by a stripping roller 5.
  • the strip 3 is brought into the bath through a sheath 6 for confining the atmosphere which has one end 6a plunging into The bath to ensure the tightness of the internal volume of the sheath with respect to the outside.
  • a wiping device 7 which may be mechanical by rollers or by gas projection.
  • the roller 4 (and the roller 5) is carried by an arm 4a (5a for the roller 5) which is fixed in a removable manner to a fixed structure of the line extending above the tank 2 and which also carries the sheath 6.
  • Figure 2 there is a galvanizing line structure at the bath 2 of molten alloy substantially identical to that of Figure 1, at least in its main components.
  • the production of a second product can be carried out on the same line. It is then necessary, after stopping the latter, to dismantle or retract the members 4, 5, 6, 7 and / or 11 and, by means of a lifting bridge, to approach the tank 8 of the fixed tank 2 that we will have partially emptied of its content.
  • the tank 8 will preferably contain a start of the bath 10 of a second alloy which will have been created for example by means of an oven or by means of an auxiliary heating which it may include. The melting of ingots is faster when they are in contact with an already created bath.
  • the organs 4, 5, 6, 7 and / or 11 are then put back into place and each of the baths 1 and 10 is supplemented by adding ingots or, for bath 1, of part of the drain portion. of the initial bath which may have been kept in the liquid state.
  • the metal strip then passes into the bath 10 and is coated with the aforesaid second alloy.
  • the operation consisting in the commissioning of the auxiliary tank is relatively fast so that the downtime of the galvanizing line is not prohibitive as regards its impact on the cost of production.
  • the method according to the invention allows the safe passage from one alloy to another since the latter are contained in two different tanks without any possible solution of a component of the first bath in the second.
  • the coating of a metal strip with a zinc alloy is carried out today by means of an installation called a galvanizing line along which the strip runs and undergoes various treatments.
  • a galvanizing line along which the strip runs and undergoes various treatments.
  • a cleaning station there is successively a cleaning station, a preheating station with or without atmosphere control, a so-called laboratory station where generally the heating of the strip continues in a very reducing atmosphere, possibly a cooling station to finally arrive in a bath of molten zinc alloy.
  • the strip On leaving the bath, the strip is drained and cooled to be either wound up or carried through subsequent treatment stations (such as, for example, heat treatment or surface treatment stations, etc.).
  • the invention intends to propose another solution for the production, on the same galvanizing line, of two different products, that is to say coated with different alloys, successively, by means of a process of galvanization.
  • the provisions of the invention advantageously allow a change of bath with a minimum of handling of molten metal, a maximum of safety in particular for the temperature-maintaining device and finally in a relatively short time, that is to say without impact. appreciable on the production capacity and therefore on the cost price of the finished product.
  • the object of the invention is a process for producing consecutively on a single production line at least two sheet metal products coated with different metal alloys, the production line comprising in particular a fixed tank of molten alloy in which the metal foil scrolls.
  • this method consists, in order to pass from the first to the second product, in placing in the bath of said fixed tank, a removable tank of lower volume containing one of the aforesaid alloys different from that contained in the fixed tank, to maintain the temperature of the bath of the removable tank by regulating the temperature of the bath of the fixed tank and to scrolling said metal sheet through the bath of the removable tank, and, to switch from the second to the first product, removing said removable tank, the metal sheet then moving through the fixed tank. It is advantageous, in this process, to constitute at least one bath starter in the removable tank before the installation of this tank in the bath of the fixed tank.
  • One of the phases of the process resides in the fact that, prior to the installation of the removable tank, the fixed tank is partially emptied and then, after this installation, the two baths are completed to an identical level.
  • FIG. 1 is a schematic sectional view of a known galvanizing installation in the zone of the molten alloy bath
  • FIG. 1 illustrates by the same schematic section an installation for implementing the method according to the invention.
  • a portion of the galvanizing line can be seen at the level of the bath of molten zinc alloy.
  • This bath 1 is contained in a fixed tank 2 which has heat supply elements known in themselves and not shown, such as inductors.
  • the means for guiding the metal strip 3 in the bath 1 during its circulation in direction A consist of a return roller 4 immersed in this bath through which the strip passes from its plunging path to its substantially vertical extraction path. This guidance is completed by a stripping roller 5.
  • the strip 3 is brought into the bath through a sheath 6 for confining the atmosphere which has one end 6a plunging into the bath to seal the internal volume of the sheath with respect to the outside.
  • a wiping device 7 which may be mechanical by rollers or by gas projection.
  • the roller 4 (and the roller 5) is carried by an arm 4a (5a for the roller 5) which is fixed in a removable manner to a fixed structure of the line extending above the tank 2 and which also carries the sheath 6.
  • Figure 2 there is a galvanizing line structure at the bath 2 of molten alloy substantially identical to that of Figure 1, at least in its main components.
  • the production of a second product can be carried out on the same line. It is then necessary, after stopping the latter, to dismantle or retract the members 4, 5, 6, 7 and / or 11 and, by means of a lifting bridge, to approach the tank 8 of the fixed tank 2 that we will have partially emptied of its content.
  • the tank 8 will preferably contain a start of the bath 10 of a second alloy that will have been created for example by means of an oven or by means of an auxiliary heating that it may include. The melting of ingots is faster when they are in contact with an already created bath.
  • the organs 4, 5, 6, 7 and / or 11 are then put back into place and each of the baths 1 and 10 is supplemented by adding ingots or, for bath 1, of part of the drain portion. of the initial bath which may have been kept in the liquid state.
  • the metal strip then passes into the bath 10 and is coated with the aforesaid second alloy.
  • the operation consisting in the commissioning of the auxiliary tank is relatively fast so that the downtime of the galvanizing line is not prohibitive as regards its impact on the cost of production.
  • the method according to the invention allows the safe passage from one alloy to another since the latter are contained in two different tanks without any possible solution of a component of the first bath in the second.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Coating With Molten Metal (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
PCT/FR1984/000176 1984-03-29 1984-07-23 Procede de galvanisation pour produire consecutivement deux revetements differents sur une bande metallique Ceased WO1985004427A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BR8407306A BR8407306A (pt) 1984-03-29 1984-07-23 Processo para galvanizacao para produzir consecutivamente dois revestimentos diferentes sobre uma cinta metalica
IN645/DEL/84A IN160743B (https=) 1984-03-29 1984-08-13
FI854696A FI78323C (fi) 1984-03-29 1985-11-27 Foerfarande foer framstaellning av minst tvao produkter i form av metallband belagda med olika metallegeringar i en enda framstaellningslinje.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8404902A FR2562093B1 (fr) 1984-03-29 1984-03-29 Procede de galvanisation pour produire consecutivement deux revetements differents sur une bande metallique
FR84/04902 1984-03-29

Publications (1)

Publication Number Publication Date
WO1985004427A1 true WO1985004427A1 (fr) 1985-10-10

Family

ID=9302587

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR1984/000176 Ceased WO1985004427A1 (fr) 1984-03-29 1984-07-23 Procede de galvanisation pour produire consecutivement deux revetements differents sur une bande metallique

Country Status (13)

Country Link
US (1) US4645694A (https=)
EP (1) EP0157057B1 (https=)
JP (1) JPS61500670A (https=)
KR (1) KR910006641B1 (https=)
AT (1) ATE31742T1 (https=)
AU (1) AU565765B2 (https=)
BR (1) BR8407306A (https=)
CA (1) CA1220679A (https=)
DE (1) DE3468439D1 (https=)
FI (1) FI78323C (https=)
FR (1) FR2562093B1 (https=)
IN (1) IN160743B (https=)
WO (1) WO1985004427A1 (https=)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPP107997A0 (en) * 1997-12-22 1998-01-22 Bhp Steel (Jla) Pty Limited Coating metal strip
US20040121083A1 (en) * 2002-11-07 2004-06-24 Galvak, S.A. De C.V. Method and apparatus for change-over of the molten metal coating composition in a steel strip coating line
DE102013101131A1 (de) * 2013-02-05 2014-08-07 Thyssenkrupp Steel Europe Ag Vorrichtung zum Schmelztauchbeschichten von Metallband
US11384419B2 (en) * 2019-08-30 2022-07-12 Micromaierials Llc Apparatus and methods for depositing molten metal onto a foil substrate

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2135388A (en) * 1932-10-01 1938-11-01 Crown Cork & Seal Co Method of coating iron or steel articles with aluminum
US2751311A (en) * 1954-09-28 1956-06-19 Ajax Electric Company Aluminizing
FR1538560A (fr) * 1967-07-26 1968-09-06 Tech A Gordet Et Cie Off Procédé et dispositif pour le revêtement des métaux ferreux
US3758333A (en) * 1969-07-07 1973-09-11 Thompson E Method for galvanizing
FR2378102A1 (fr) * 1977-01-21 1978-08-18 Inst Elektroswarki Patona Four a bain pour metallisation a chaud

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53141127A (en) * 1977-05-16 1978-12-08 Nippon Steel Corp Molten zinc plating device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2135388A (en) * 1932-10-01 1938-11-01 Crown Cork & Seal Co Method of coating iron or steel articles with aluminum
US2751311A (en) * 1954-09-28 1956-06-19 Ajax Electric Company Aluminizing
FR1538560A (fr) * 1967-07-26 1968-09-06 Tech A Gordet Et Cie Off Procédé et dispositif pour le revêtement des métaux ferreux
US3758333A (en) * 1969-07-07 1973-09-11 Thompson E Method for galvanizing
FR2378102A1 (fr) * 1977-01-21 1978-08-18 Inst Elektroswarki Patona Four a bain pour metallisation a chaud

Also Published As

Publication number Publication date
CA1220679A (en) 1987-04-21
DE3468439D1 (en) 1988-02-11
FR2562093B1 (fr) 1988-07-22
IN160743B (https=) 1987-08-01
EP0157057A1 (fr) 1985-10-09
BR8407306A (pt) 1986-04-15
KR850007099A (ko) 1985-10-30
FI78323B (fi) 1989-03-31
AU3159084A (en) 1985-11-01
JPS6411110B2 (https=) 1989-02-23
ATE31742T1 (de) 1988-01-15
AU565765B2 (en) 1987-09-24
JPS61500670A (ja) 1986-04-10
FR2562093A1 (fr) 1985-10-04
FI854696L (fi) 1985-11-27
FI854696A0 (fi) 1985-11-27
FI78323C (fi) 1989-07-10
US4645694A (en) 1987-02-24
KR910006641B1 (ko) 1991-08-29
EP0157057B1 (fr) 1988-01-07

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