EP2954086B1 - Ôle à revêtement znalmg à microstructure particulière et procédé de réalisation correspondant - Google Patents

Ôle à revêtement znalmg à microstructure particulière et procédé de réalisation correspondant Download PDF

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Publication number
EP2954086B1
EP2954086B1 EP13762578.6A EP13762578A EP2954086B1 EP 2954086 B1 EP2954086 B1 EP 2954086B1 EP 13762578 A EP13762578 A EP 13762578A EP 2954086 B1 EP2954086 B1 EP 2954086B1
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EP
European Patent Office
Prior art keywords
coating
metal sheet
content
sheet according
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Prior art date
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EP13762578.6A
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German (de)
English (en)
French (fr)
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EP2954086A1 (fr
Inventor
Christian Allely
Luc Diez
Tiago MACHADO AMORIM
Jean-Michel Mataigne
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ArcelorMittal SA
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ArcelorMittal SA
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Priority to RS20170249A priority Critical patent/RS55768B1/sr
Priority to SI201330594A priority patent/SI2954086T1/sl
Priority to PL13762578T priority patent/PL2954086T3/pl
Priority to HRP20170460TT priority patent/HRP20170460T1/hr
Publication of EP2954086A1 publication Critical patent/EP2954086A1/fr
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C18/00—Alloys based on zinc
    • C22C18/04—Alloys based on zinc with aluminium as the next major constituent
    • 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
    • C23C2/04—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
    • 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
    • C23C2/04—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
    • C23C2/12—Aluminium 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
    • C23C2/26—After-treatment
    • 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
    • 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
    • C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
    • C23C2/36—Elongated material
    • C23C2/40—Plates; Strips
    • 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
    • C23C28/021—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material including at least one metal alloy layer
    • 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
    • C23C28/023—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only
    • C23C28/025—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only with at least one zinc-based layer
    • 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
    • C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
    • 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
    • C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
    • C23C30/005—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process on hard metal substrates
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12535—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component
    • Y10T428/12556—Organic component
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12785—Group IIB metal-base component
    • Y10T428/12792—Zn-base component
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12785—Group IIB metal-base component
    • Y10T428/12792—Zn-base component
    • Y10T428/12799—Next to Fe-base component [e.g., galvanized]
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12951—Fe-base component
    • Y10T428/12972—Containing 0.01-1.7% carbon [i.e., steel]
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12771—Transition metal-base component
    • Y10T428/12861—Group VIII or IB metal-base component
    • Y10T428/12951—Fe-base component
    • Y10T428/12972—Containing 0.01-1.7% carbon [i.e., steel]
    • Y10T428/12979—Containing more than 10% nonferrous elements [e.g., high alloy, stainless]
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12993—Surface feature [e.g., rough, mirror]

Definitions

  • the present invention relates to a sheet comprising a substrate of which at least one face is coated with a metal coating comprising Al and Mg, the remainder of the metal coating being Zn, unavoidable impurities and possibly one or more additional elements. chosen from Si, Sb, Pb, Ti, Ca, Mn, Sn, La, Ce, Cr, Ni or Bi, the content by weight of each additional element in the metal coating being less than 0.3%.
  • Galvanized metal coatings consisting essentially of zinc and 0.1 to 0.4% by weight of aluminum are traditionally used for their good protection against corrosion.
  • Such metal coatings will generally be referred to herein as zinc-aluminum-magnesium or ZnAIMg coatings.
  • These sheets are for example intended for the automotive field, household appliances or construction.
  • An object of the invention is to provide a coated sheet whose corrosion resistance, when it is painted, is increased.
  • the first object of the invention is a sheet according to claim 1.
  • the sheet may also comprise the features of claims 2 to 12, taken alone or in combination.
  • the invention also relates to a method according to claim 13.
  • the method may also include the features of claims 14 and 15, taken alone or in combination.
  • Sheet 1 of the figure 1 comprises a substrate 3 of steel covered on each of its two faces 5 by a metal coating 7, itself covered by a film of paint 9, 11.
  • the coatings 7 present on the two faces 5 are similar and only one will be described in detail later. As a variant (not shown), only one of the faces 5 has a coating 7.
  • the coating 7 generally has a thickness less than or equal to 25 microns and aims to protect the substrate 3 against corrosion.
  • the coating 7 comprises zinc, aluminum and magnesium.
  • the weight content of aluminum t Al of the metal coating 7 is between 3.6 and 3.8%.
  • the weight content of magnesium t Mg of the metal coating 7 is between 2.7 and 3.3%.
  • the magnesium t Mg content is between 2.9 and 3.1%.
  • the mass ratio AI / (AI + Mg) is greater than or equal to 0.45, or even greater than or equal to 0.50, or even greater than or equal to 0.55.
  • the coating 7 has a particular microstructure with a lamellar matrix 13 of ternary eutectic Zn / Al / MgZn 2 .
  • the lamellar matrix 13 forms grains separated by seals 19.
  • the ternary eutectic constitutes the entire microstructure of the coating.
  • the interlamellar distance of the lamellar matrix 13 can vary quite strongly within its grains, especially in the vicinity of the structures possibly encompassed by this matrix, structures which will now be described.
  • the surface and cross-sectional microstructure may comprise Zn dendrites and Zn / MgZn 2 binary eutectic flowers in small amounts. which are not too detrimental to the improvement of the delamination resistance obtained according to the invention.
  • the cumulative surface area of Zn dendrites on the outer surface 21 in the raw state is less than 5.0%, even 3.0%, even 2.0%, or even 1.0%, and ideally zero and the cumulated surface content of Zn / MgZn 2 binary eutectic flowers 17 on the outer surface 21 in the raw state is less than 15.0%, even 10.0% or even 5.0%, or even 3%, 0% and ideally zero.
  • the microstructure may also comprise binary eutectic dendrites Zn / Al or islands of MgZn 2 , in very small quantities because these structures greatly deteriorate the delamination resistance of the coated sheets according to the invention.
  • the cumulative surface content of Zn / Al binary eutectic dendrites on the outer surface 21 in the raw state is less than 1.0% and the cumulative surface area of MgZn 2 islands on the surface in the raw state is less than 1.0% and these accumulated contents are preferably zero.
  • the respective cumulative cross-sectional contents of Zn / Al binary eutectic dendrites and MgZn 2 islands are preferably zero.
  • the microstructure will consist of a lamellar matrix 13 of ternary eutectic and possibly Zn dendrites, Zn / MgZn 2 binary eutectic flowers 17, binary eutectic dendrites Zn / Al and of islands of MgZn2.
  • the microstructure may also comprise small amounts of other structures included in the lamellar matrix 13 of ternary eutectic.
  • the cumulative surface contents for each structure are for example measured by taking at least 30 views with an X1000 magnification of the outer surface 21 in the raw state (that is to say without polishing but optionally degreased by organic solvent) thanks to a scanning electron microscope.
  • the contours of the structure whose content is to be measured are extracted, and then, for example, using the AnalySIS Docu 5.0 software from Olympus Soft Imaging Solutions GmbH, the occupancy rate of the outer surface 21 by the structure in question.
  • the occupancy rate thus calculated is the cumulative surface content of the structure in question.
  • the paint films 9 and 11 are for example based on polymers. These polymers may be polyesters or halogenated derivatives of vinyl polymers such as plastisols, PVDF, etc.
  • the films 9 and 11 typically have thicknesses of between 1 and 200 ⁇ m. To produce the sheet 1, one can for example proceed as follows.
  • the installation used may comprise a single line or, for example, two different lines for producing respectively the metal coatings and the painting.
  • two different lines may be located on the same site or on separate sites. In the remainder of the description, for example, a variant in which two distinct lines are used is considered.
  • a substrate 3 is used, for example obtained by hot rolling and then cold rolling.
  • the substrate 3 is in the form of a strip which is scrolled in a bath to deposit the coatings 7 by hot quenching.
  • the bath is a molten zinc bath containing magnesium and aluminum.
  • the bath may also contain up to 0.3% by weight of additional optional elements such as Si, Sb, Pb, Ti, Ca, Mn, Sn, La, Ce, Cr, Ni or Bi.
  • the bath may finally contain residual elements from the ingots or resulting from the passage of the substrate 3 in the bath, such as iron at a content of up to 0.5% by weight and generally between 0.1 and 0.4% by weight.
  • the bath has a temperature Tb of between 360 ° C and 480 ° C, preferably between 420 ° C and 460 ° C.
  • the substrate 3 has an immersion temperature Ti such that: 2 , 34 ⁇ t al + 0 , 665 ⁇ t mg - 10 , 1 ⁇ 10 - 6 ⁇ exp - 10584 / Ti where Ti is expressed in degrees Kelvin.
  • Such an immersion temperature Ti makes it possible to obtain the abovementioned microstructure with little or no structures included in the lamellar matrix 13.
  • this temperature Ti is determined on site from a measurement made a few meters upstream of the bath by a pyrometric technique then application of a thermal model to calculate the temperature Ti.
  • the cooling conditions of the substrate 3 are modified upstream of the bath.
  • This cooling can be provided by blowing inert cooling gas on both sides 5 of the substrate 3 by means of cooling boxes, the pressure of the gas can be regulated. It is also possible to play on the speed of travel of the substrate 3 in the cooling zone or on the temperature of the substrate 3 at the entrance of this zone, for example.
  • the substrate 3 is for example spun by means of nozzles throwing a gas on either side of the substrate 3.
  • the coatings 7 are then allowed to cool in a controlled manner to solidify.
  • a brushing may be performed to remove the coating 7 deposited on a face 5 so that only one of the faces 5 of the sheet 1 will be finally coated with a coating 7.
  • Controlled cooling of the or each coating 7 is provided at a rate preferably greater than or equal to 15 ° C / s between the onset of solidification (i.e., when the coating 7 falls just below the liquidus temperature). ) and the end of solidification (that is to say when the coating 7 reaches the temperature of the solidus). More preferably, the cooling rate of the or each coating 7 between the onset of solidification and the end of solidification is greater than or equal to 20 ° C / s.
  • the band thus treated can then be subjected to a so-called skin-pass step which allows the harden and give it a roughness facilitating its subsequent shaping.
  • the band may optionally be wound before being sent to a prelacing line.
  • the outer surfaces 21 of the coatings 7 are optionally subjected to a degreasing step and possibly to a surface treatment step to increase the adhesion of the paint and the corrosion resistance.
  • the possible steps of degreasing and surface treatment may include other sub-stages of rinsing, drying ...
  • the painting can then be performed for example by depositing two layers of successive paints, namely a primer layer and a layer of finish which is generally the case for making the upper film 9, or by deposition of a single layer of paint, which is generally the case for making the lower film 11.
  • a primer layer and a layer of finish which is generally the case for making the upper film 9
  • deposition of a single layer of paint which is generally the case for making the lower film 11.
  • Other numbers of layers can be used in certain variants .
  • the deposition of the paint layers is provided for example by roller coaters.
  • Each deposit of a paint layer is generally followed by a step of cooking in an oven.
  • the sheet 1 thus obtained can again be wound before being cut, possibly shaped and assembled with other sheets 1 or other elements by users.
  • a sample of sheet 1 according to the invention was prepared and samples of sheets not corresponding to the invention by varying the immersion temperature Ti, t Al and t Mg samples. The corresponding microstructures were analyzed to determine the existing structures and their cumulative surface contents. Microstructure of the coating - cumulative surface contents Trial t Al (%) t Mg (%) Ti (K) Ternary Eutectic (%) Dendrites of Zn (%) Binary Eutectic Flowers Zn / MgZn2 (%) Zn / AI binary eutectic dendrites (%) Islets of MgZn2 (%) * 1 3.7 3.0 753 100 0 0 0 0 2 3.7 3.0 713 95 0 0 5 0 3 * 3.7 3.3 753 100 0 0 0 0 4 3.7 3.3 713 80 0 15 0 5 * according to the invention
  • a sample of sheet metal 1 according to the invention and sheets not corresponding to the invention were subjected to delamination tests to measure their resistance to paint corrosion.
  • the coatings of the sheets tested had thicknesses of 8 ⁇ m.
  • composition of the coatings 7 of the sheets 1 according to the invention had an Al content of 3.7% and an Mg content of 3.0%. As indicated under the abscissa axis on the figure 5 , Other coating compositions tested had t Al values of 0.3%, 1.5%, 6.0% and 11.0% and t Mg 1.0%, 1.5%, 3, 0 and 3.0%.
  • test plates were phosphated, covered with a layer of cataphoresis and scratched to the substrate with a blade 1 mm wide.
  • the delamination widths are optimal for the sheet according to the invention.
  • Curve 23 corresponds to a composition comprising 3.7% by weight of Al and 3.0% by weight of Mg, the remainder being Zn. This curve is therefore representative of the lamellar matrix 13.
  • the figure 6 shows that the risk of corrosive coupling of the lamellar matrix 13 is greater with structures containing Al (curve 25), Mg (curve 27) and Zn (curve 29).
  • the sheets 1 according to the invention are not necessarily marketed in painted form ("prepainted" sheets) and / or they may be coated with at least one layer of oil.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Coating With Molten Metal (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Laminated Bodies (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
EP13762578.6A 2013-02-06 2013-07-08 Ôle à revêtement znalmg à microstructure particulière et procédé de réalisation correspondant Active EP2954086B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
RS20170249A RS55768B1 (sr) 2013-02-06 2013-07-08 Lim sa znalmg prevlakom koja ima određenu mikrostrukturu, i odgovarajući postupak proizvodnje
SI201330594A SI2954086T1 (sl) 2013-02-06 2013-07-08 Pločevina s prevleko ZnAlMg s posebno mikrostrukturo in ustrezen izdelovalni postopek
PL13762578T PL2954086T3 (pl) 2013-02-06 2013-07-08 Blacha z powłoką ZnAlMg o określonej mikrostrukturze i odpowiedni sposób wytwarzania
HRP20170460TT HRP20170460T1 (hr) 2013-02-06 2013-07-08 METALNI LIM SA ZnAlMg PREMAZOM KOJI IMA POSEBNU MIKROSTRUKTURU, TE ODGOVARAJUĆI POSTUPAK PROIZVODNJE

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2013050250 2013-02-06
PCT/IB2013/055575 WO2014122507A1 (fr) 2013-02-06 2013-07-08 TÔLE À REVÊTEMENT ZnAlMG À MICROSTRUCTURE PARTICULIÈRE ET PROCÉDÉ DE RÉALISATION CORRESPONDANT

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EP2954086A1 EP2954086A1 (fr) 2015-12-16
EP2954086B1 true EP2954086B1 (fr) 2017-01-11

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KR (1) KR102070480B1 (enrdf_load_stackoverflow)
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HR (1) HRP20170460T1 (enrdf_load_stackoverflow)
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LT (1) LT2954086T (enrdf_load_stackoverflow)
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MX (1) MX360981B (enrdf_load_stackoverflow)
PL (1) PL2954086T3 (enrdf_load_stackoverflow)
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RS (1) RS55768B1 (enrdf_load_stackoverflow)
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SI (1) SI2954086T1 (enrdf_load_stackoverflow)
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JP7257955B2 (ja) * 2016-08-08 2023-04-14 コロラド・スクール・オブ・マインズ 低い液相線温度を有する改変された溶融亜鉛めっき被膜、その製造方法及び使用方法
AU2017392662A1 (en) * 2017-01-16 2019-08-15 Nippon Steel & Sumitomo Metal Corporation Plated steel material
MX2020005734A (es) 2017-12-28 2020-08-13 Nippon Steel Corp Lamina de acero enchapada a base de zn fundido con resistencia a la corrosion superior despues de ser recubierta.
CN108913965B (zh) * 2018-07-31 2021-02-26 中研智能装备有限公司 一种钢结构用ZnAlTiSiB防腐涂层及其制备方法
KR102142766B1 (ko) 2018-08-31 2020-08-07 주식회사 포스코 내식성 및 가공성이 우수한 용융도금강판 및 이의 제조방법
PH12023551049A1 (en) * 2020-10-21 2023-11-20 Nippon Steel Corp Coated steel product
WO2022107837A1 (ja) * 2020-11-18 2022-05-27 日本製鉄株式会社 めっき鋼材
AU2021381168B2 (en) * 2020-11-18 2024-07-18 Nippon Steel Corporation Plated steel material

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NZ331311A (en) * 1996-12-13 2000-08-25 Nisshin Steel Co Ltd Hot-dip Zn-Al-Mg plated steel sheet and method of production
US6465114B1 (en) * 1999-05-24 2002-10-15 Nippon Steel Corporation -Zn coated steel material, ZN coated steel sheet and painted steel sheet excellent in corrosion resistance, and method of producing the same
JP2001295015A (ja) * 2000-02-09 2001-10-26 Nisshin Steel Co Ltd 高Ａｌ含有溶融Ｚｎ−Ａｌ−Ｍｇ系めっき鋼板
JP4555492B2 (ja) * 2000-03-16 2010-09-29 新日本製鐵株式会社 耐眩性に優れた溶融亜鉛−アルミニウム合金めっき鋼板
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Also Published As

Publication number Publication date
SI2954086T1 (sl) 2017-05-31
ES2620112T3 (es) 2017-06-27
RU2636215C2 (ru) 2017-11-21
MX2015010064A (es) 2016-04-27
HRP20170460T1 (hr) 2017-05-19
BR112015018780A2 (pt) 2017-07-18
UA114231C2 (uk) 2017-05-10
CN105247094A (zh) 2016-01-13
EP2954086A1 (fr) 2015-12-16
CA2900085C (en) 2020-10-13
HUE032189T2 (hu) 2017-09-28
US20150368778A1 (en) 2015-12-24
US9598757B2 (en) 2017-03-21
KR102070480B1 (ko) 2020-01-29
PT2954086T (pt) 2017-04-11
LT2954086T (lt) 2017-03-27
MX360981B (es) 2018-11-22
CA2900085A1 (en) 2014-08-14
RS55768B1 (sr) 2017-07-31
MA38321B1 (fr) 2016-09-30
CN105247094B (zh) 2018-03-06
BR112015018780B1 (pt) 2021-04-27
WO2014122507A1 (fr) 2014-08-14
PL2954086T3 (pl) 2017-07-31
MA38321A1 (fr) 2016-02-29
RU2015137791A (ru) 2017-03-13
JP6185084B2 (ja) 2017-08-23
DK2954086T3 (en) 2017-03-27
KR20160004997A (ko) 2016-01-13
JP2016514202A (ja) 2016-05-19

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