EP2841615A1 - Verfahren zum herstellen eines bleches mit beölten zn-al-mg-beschichtungen und entsprechendes blech - Google Patents

Verfahren zum herstellen eines bleches mit beölten zn-al-mg-beschichtungen und entsprechendes blech

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Publication number
EP2841615A1
EP2841615A1 EP13727384.3A EP13727384A EP2841615A1 EP 2841615 A1 EP2841615 A1 EP 2841615A1 EP 13727384 A EP13727384 A EP 13727384A EP 2841615 A1 EP2841615 A1 EP 2841615A1
Authority
EP
European Patent Office
Prior art keywords
metal coatings
outer surfaces
magnesium
coatings
solution
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
EP13727384.3A
Other languages
English (en)
French (fr)
Other versions
EP2841615B1 (de
Inventor
Tiago MACHADO AMORIM
Joëlle RICHARD
Eric JACQUESON
Audrey LHERMEROULT
Pascale FELTIN
Jean-Michel LEMAIRE
Luc Diez
Jean-Michel Mataigne
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.)
ArcelorMittal SA
Original Assignee
ArcelorMittal Investigacion y Desarrollo SL
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Application filed by ArcelorMittal Investigacion y Desarrollo SL filed Critical ArcelorMittal Investigacion y Desarrollo SL
Priority to PL13727384T priority Critical patent/PL2841615T3/pl
Publication of EP2841615A1 publication Critical patent/EP2841615A1/de
Application granted granted Critical
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Classifications

    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23GCLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/12Light metals
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C28/00Coating 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
    • C23C28/30Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
    • C23C28/34Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
    • C23C28/345Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates with at least one oxide layer
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/06Zinc or cadmium or alloys based thereon
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/26After-treatment
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/26After-treatment
    • C23C2/28Thermal after-treatment, e.g. treatment in oil bath
    • C23C2/29Cooling or quenching
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C2/00Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/34Hot-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
    • C23C2/36Elongated material
    • C23C2/40Plates; Strips
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C22/00Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C22/00Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/48Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
    • C23C22/53Treatment of zinc or alloys based thereon
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C22/00Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/82After-treatment
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23CCOATING 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
    • C23C28/00Coating 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
    • C23C28/30Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
    • C23C28/32Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
    • C23C28/321Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer with at least one metal alloy layer
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/12All metal or with adjacent metals
    • Y10T428/12493Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
    • Y10T428/12535Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.] with additional, spatially distinct nonmetal component
    • Y10T428/12542More than one such component
    • Y10T428/12549Adjacent to each other

Definitions

  • the present invention relates to a sheet comprising a steel substrate having two faces each coated with a metal coating comprising zinc, magnesium and aluminum.
  • Such sheets are more particularly intended for the manufacture of parts for the automotive industry, without being limited thereto.
  • Metal coatings essentially comprising zinc and aluminum in a small proportion are traditionally used for their good protection against corrosion. These metal coatings are now in competition with coatings including zinc, magnesium and aluminum.
  • Such metal coatings will generally be referred to herein as zinc-aluminum-magnesium or ZnAIMg coatings.
  • magnesium significantly increases the corrosion resistance of these coatings, which can reduce their thickness or increase the guarantee of protection against corrosion over time.
  • Sheet metal coils with such surface coatings may sometimes be stored in storage sheds for several months and must not be affected by the appearance of surface corrosion before being shaped by the end user.
  • no corrosion primer should appear regardless of the storage environment, even in the event of exposure to the sun and / or a wet or salty environment.
  • Standard galvanized products that is to say whose coatings essentially comprise zinc and aluminum in a small proportion, are also subject to these stresses and are coated with a protective oil which is generally sufficient to provide protection against storage corrosion.
  • An object of the invention is to improve the temporary protection of ZnAIMg coated sheets.
  • the invention firstly relates to a method according to claim 1.
  • the method may also include the features of claims 2 to 23, taken alone or in combination.
  • the invention also relates to a sheet according to claim 24.
  • FIG. 1 is a diagrammatic sectional view illustrating the structure of a sheet obtained by a method according to the invention.
  • FIGS. 2 and 3 show XPS spectroscopic analysis results of the outer surfaces of the metal coatings
  • FIG. 4 is a diagram illustrating the dewetting phenomenon
  • FIG. 5 shows curves illustrating the results of aging tests under natural exposure under shelter carried out on various specimens of sheets treated according to the invention or untreated.
  • Sheet 1 of FIG. 1 comprises a substrate 3 made of steel coated on each of its two faces 5 by a metal coating 7.
  • the coatings 7 present on the two faces 5 are similar and only one will be described in detail later.
  • the coating 7 generally has a thickness less than or equal to 25 ⁇ and conventionally aims to protect the substrate 3 against corrosion.
  • the coating 7 comprises zinc, aluminum and magnesium. It is particularly preferred that the coating 7 comprises between 0.1 and 10% by weight of magnesium and between 0.1 and 20% by weight of aluminum.
  • the coating 7 comprises more than 0.3% by weight of magnesium or between 0.3% and 4% by weight of magnesium and / or between 0.5 and 11% or even between 0.7 and 6% by weight of aluminum, or even between 1 and 6% by weight of aluminum.
  • the mass ratio Mg / Al between the magnesium and the aluminum in the coating 7 is strictly less than or equal to 1, preferably strictly less than 1, or even strictly less than 0.9.
  • the substrate 3 obtained for example by hot rolling and cold.
  • the substrate 3 is in the form of a strip which is passed through 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 each of the optional addition elements such as Si, Sb, Pb, Ti, Ca, Mn, Sn, La, Ce, Cr, Ni, Zr or Bi. These various elements may make it possible, inter alia, to improve the ductility or the adhesion of the coatings 7 to the substrate 3. The skilled person who knows their effects on the characteristics of the coatings 7 will be able to use them according to the complementary aim sought. .
  • the bath may finally contain residual elements coming from the ingots or resulting from the passage of the substrate 3 in the bath, such as iron at a content of up to 5% by weight and generally between 2 and 4% by weight. .
  • 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.
  • the strip thus treated can then be subjected to a so-called skin-pass step which allows it to be hardened so as to erase the elastic bearing, to fix the mechanical characteristics and to give it a roughness adapted to the subsequent operations that the sheet metal must undergo.
  • the means for adjusting the skin-pass operation is the rate of elongation which must be sufficient to achieve the objectives and minimum to maintain the capacity for subsequent deformation.
  • the elongation rate is usually between 0.3 to 3%, and preferably between 0.3 and 2.2%.
  • the outer surfaces 15 of the coatings 7 are then oiled to provide temporary protection.
  • the oils employed may conventionally be Quaker or Fuchs oils and the basis weight of the oil layers deposited on each outer surface is, for example, less than or equal to 5 g / m 2 .
  • the oil layers deposited have not been shown in FIG.
  • the sheet 1 thus obtained can be wound before being cut, possibly shaped and assembled with other sheets 1 or other elements by users.
  • XPS X ray Photoemission Spectroscopy
  • FIGS. 2 and 3 respectively show the spectra of the elements for the energy levels C1 s (curve 17), 01 s (curve 19), Mg1 s (curve 21), Al2p (curve 23) and Zn2p3 (curve 25) during of an XPS spectroscopy analysis.
  • the corresponding atomic percentages are plotted on the ordinate and the analysis depth on the abscissa.
  • the sample analyzed in FIG. 2 corresponds to coatings 7 comprising 3.7% by weight of aluminum and 3% by weight of magnesium and subjected to a conventional skin pass step with an elongation rate of 0.5. % while the sample of Figure 3 has not been subjected to such a step.
  • the thickness of the magnesium oxide or magnesium hydroxide layers is about 5 nm.
  • ZnAIMg coated sheets have a low ability to be wetted with oil. This is reflected visually by a deposit of protective oil in the form of droplets while it is continuous or film-forming on conventional galvanized coatings.
  • the inventors have also observed dewetting phenomena of the deposited oil, so that certain areas are no longer covered with oils. Such a zone is indicated by the reference 41 in FIG. 4.
  • the temporary protection is therefore heterogeneous.
  • tarnishing phenomena linked or not to dewetting, may appear after a few weeks under certain storage conditions.
  • This alteration step may be performed by any suitable means, such as, for example, the application of mechanical forces.
  • Such mechanical forces can be applied by a planer, brushing devices, shot blasting ...
  • a planer which is characterized by the application of a plastic deformation by bending between rollers, can be adjusted to deform the sheet that passes through it sufficiently to create cracks in the oxide layers of magnesium or hydroxide magnesium.
  • the application of mechanical forces on the outer surfaces 15 of the metal coatings 7 can be combined with the application of an acid solution or the application of a degreasing, for example based on an alkaline solution, on the surfaces outside 15.
  • the acid solution has for example a pH of between 1 and 4, preferably between 1 and 3.5, preferably between 1 and 3, and more preferably between 1 and 2.
  • This solution may comprise, for example, hydrochloric acid. , sulfuric acid or phosphoric acid.
  • the duration of application of the acid solution may be between 0.2 s and 30 s, preferably between 0.2 s and 15 s, and more preferably between 0.5 s and 15 s, depending on the pH of the solution, when and how it is applied.
  • This solution can be applied by immersion, sprinkling or any other system.
  • the temperature of the solution may for example be room temperature or any other temperature and subsequent rinsing and drying steps may be used.
  • the purpose of the degreasing step is to clean the outer surfaces and thus to remove traces of organic dirt, metal particles and dust.
  • this step does not alter the chemical nature of the outer surfaces with the exception of the weathering of any surface aluminum oxide / hydroxide layer.
  • the solution used for this degreasing step is non-oxidizing. Therefore, magnesium oxide or magnesium hydroxide are not formed on the outer surfaces during the degreasing step and more generally before the oil application step.
  • a degreasing step it intervenes before or after the step of applying the acid solution.
  • the optional degreasing step and the step of applying the acid solution take place before a possible surface treatment step, that is to say a step for forming on the outer surfaces 15 layers (not shown). ) improving the corrosion resistance and / or adhesion of further layers subsequently deposited on the outer surfaces 15.
  • Such a surface treatment step comprises the application on the outer surfaces of a surface treatment solution which chemically reacts with the outer surfaces 15.
  • this solution is a conversion solution and the formed layers are conversion layers.
  • the conversion solution does not contain chromium. It can thus be a solution based on hexafluorotitanic acid or hexafluorozirconic acid.
  • the mechanical forces will preferably be applied before the acidic solution or while it is present on the outer surfaces to favor the action of the acid solution.
  • the mechanical forces may be less intense.
  • the acid solution application step and the surface treatment step are combined.
  • the surface treatment solution that is acidic.
  • the pH may be strictly greater than 3, especially if the surface treatment solution is applied at a temperature above 30 ° C.
  • Samples 1-6 were also exposed to the ambient atmosphere for 12 weeks under the conditions described in VDA230-213 to assess their temporary protection.
  • the monitoring of the evolution of tarnishing during the test was carried out via a colorimeter measuring the luminance difference (measurement of AL * ). Any difference in luminance greater than 2 during the 12 week period is considered to be detectable by the naked eye and should be avoided.
  • the sample 1 (curve 51 in FIG. 5), which constitutes the reference, has an AL greater than 2, which is consistent with the distribution of the discontinuous oil observed visually.
  • Samples 2 to 6 (curves 52 to 56 respectively in Figure 5) have a luminescence variation of less than 2, therefore imperceptible to the naked eye.

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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)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Thermal Sciences (AREA)
  • Coating With Molten Metal (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Laminated Bodies (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Lubricants (AREA)
EP13727384.3A 2012-04-25 2013-04-25 Verfahren zum herstellen eines geölten znalmg-beschichteten blechs und entsprechendes blech Active EP2841615B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL13727384T PL2841615T3 (pl) 2012-04-25 2013-04-25 Sposób wykonania blachy z olejowanymi powłokami znalmg oraz odpowiednia blacha

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PCT/FR2012/050906 WO2013160566A1 (fr) 2012-04-25 2012-04-25 Procédé de réalisation d'une tôle à revêtements znalmg huilés et tôle correspondante.
PCT/IB2013/053286 WO2013160871A1 (fr) 2012-04-25 2013-04-25 Procédé de réalisation d'une tôle à revêtements znalmg huilés et tôle correspondante.

Publications (2)

Publication Number Publication Date
EP2841615A1 true EP2841615A1 (de) 2015-03-04
EP2841615B1 EP2841615B1 (de) 2020-06-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP13727384.3A Active EP2841615B1 (de) 2012-04-25 2013-04-25 Verfahren zum herstellen eines geölten znalmg-beschichteten blechs und entsprechendes blech

Country Status (16)

Country Link
US (2) US10294558B2 (de)
EP (1) EP2841615B1 (de)
JP (2) JP6143845B2 (de)
KR (1) KR101656166B1 (de)
CN (2) CN104334764B (de)
BR (1) BR112014026681B1 (de)
CA (1) CA2871672C (de)
ES (1) ES2808663T3 (de)
HU (1) HUE051979T2 (de)
IN (1) IN2014DN09954A (de)
MA (1) MA37452B1 (de)
MX (1) MX2014013007A (de)
PL (1) PL2841615T3 (de)
RU (1) RU2583193C1 (de)
UA (1) UA114627C2 (de)
WO (2) WO2013160566A1 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2014367679B2 (en) 2013-12-19 2019-02-14 Nisshin Steel Co., Ltd. Steel sheet hot-dip-coated with Zn-Al-Mg-based system having excellent workability and method for manufacturing same
KR20170075046A (ko) * 2015-12-22 2017-07-03 주식회사 포스코 내식성이 우수한 열간 프레스 성형품 및 그 제조방법
DE102018216317A1 (de) * 2018-09-25 2020-03-26 Thyssenkrupp Ag Verfahren zur Modifikation von feuerverzinkten Oberflächen
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MA20150099A1 (fr) 2015-03-31
WO2013160566A1 (fr) 2013-10-31
JP6487474B2 (ja) 2019-03-20
US10294558B2 (en) 2019-05-21
CA2871672A1 (fr) 2013-10-31
CN104334764A (zh) 2015-02-04
ES2808663T3 (es) 2021-03-01
PL2841615T3 (pl) 2020-11-16
MA37452B1 (fr) 2016-04-29
WO2013160871A1 (fr) 2013-10-31
JP2015521233A (ja) 2015-07-27
IN2014DN09954A (de) 2015-08-14
EP2841615B1 (de) 2020-06-24
JP6143845B2 (ja) 2017-06-07
UA114627C2 (uk) 2017-07-10
KR20150012256A (ko) 2015-02-03
CN107012419B (zh) 2019-12-24
CN104334764B (zh) 2017-07-14
BR112014026681B1 (pt) 2020-10-20
BR112014026681A2 (pt) 2017-06-27
US10865483B2 (en) 2020-12-15
US20150125714A1 (en) 2015-05-07
MX2014013007A (es) 2015-08-07
CA2871672C (fr) 2017-01-17
JP2017128810A (ja) 2017-07-27
HUE051979T2 (hu) 2021-04-28
KR101656166B1 (ko) 2016-09-08
RU2583193C1 (ru) 2016-05-10
CN107012419A (zh) 2017-08-04

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