US20130316192A1 - Method for surface treatment of a protectively coated substrate - Google Patents

Method for surface treatment of a protectively coated substrate Download PDF

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Publication number
US20130316192A1
US20130316192A1 US13/978,171 US201213978171A US2013316192A1 US 20130316192 A1 US20130316192 A1 US 20130316192A1 US 201213978171 A US201213978171 A US 201213978171A US 2013316192 A1 US2013316192 A1 US 2013316192A1
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Prior art keywords
protective coating
pickling
acid
phase
subjected
Prior art date
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Abandoned
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US13/978,171
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English (en)
Inventor
Karl-Heinz Stellnberger
Christian K. Riener
Gerald Luckeneder
Edmund Holzer
Harald Haslinger
Josef Hagler
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Voestalpine Stahl GmbH
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Voestalpine Stahl GmbH
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Assigned to VOESTALPINE STAHL GMBH reassignment VOESTALPINE STAHL GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HASLINGER, Harald, Holzer, Edmund, RIENER, Christian K., HAGLER, JOSEF, LUCKENEDER, GERALD, STELLNBERGER, KARL-HEINZ
Publication of US20130316192A1 publication Critical patent/US20130316192A1/en
Abandoned legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • 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
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F1/00—Etching metallic material by chemical means
    • 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
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F1/00—Etching metallic material by chemical means
    • C23F1/10—Etching compositions
    • C23F1/14—Aqueous compositions
    • C23F1/16—Acidic compositions
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
    • C09J5/02—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers involving pretreatment of the surfaces to be joined
    • 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
    • C23C2/26—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
    • C23C2/34—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
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F1/00—Etching metallic material by chemical means
    • C23F1/10—Etching compositions
    • C23F1/14—Aqueous compositions
    • C23F1/16—Acidic compositions
    • C23F1/30—Acidic compositions for etching other metallic 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
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/10—Other heavy metals
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2400/00—Presence of inorganic and organic materials
    • C09J2400/10—Presence of inorganic materials
    • C09J2400/16—Metal
    • C09J2400/163—Metal in the substrate
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2400/00—Presence of inorganic and organic materials
    • C09J2400/10—Presence of inorganic materials
    • C09J2400/16—Metal
    • C09J2400/166—Metal in the pretreated surface to be joined
    • 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]

Definitions

  • the invention relates to a method for surface treatment of a protectively coated substrate, particularly steel strip, for improvement of the adhesion strength, with an adhesive, wherein the at least partly multi-phase protective coating comprises at least zinc and magnesium.
  • DE102004045297A1 speaks about treatment of a metallic surface, which can also be coated with Zn and/or Mg. For this purpose, among other things, methane sulfonic acid having a pK s of ⁇ 0.6 is proposed. However, DE102004045297A1 concerns itself neither with a selection direction of the surface treatment on components of the protective coating, nor with a surface treatment for improvement of adhesion suitability.
  • the invention has therefore set itself the task, proceeding from the state of the art as described, of creating a method with which not only can a surface of a substrate protectively coated at least with zinc and magnesium be prepared for an adhesive connection in fast and cost-advantageous manner, but also, an improvement in adhesion suitability can be made possible in this way.
  • the invention accomplishes the stated task in that the protective coating is subjected to a pickling treatment that is essentially directed at at least one intermetallic Zn—Mg phase of the protective coating, using an acidic pickle.
  • the surface of a multi-phase protective coating comprising zinc and magnesium can be prepared in such a manner that in this way, particular adhesion strength with an adhesive comes about.
  • the reaction surface of the protective coating can be improved. This is because metal hydroxides (for example Zn hydroxides) that increasingly occur on the pickled locations of the protective coating are available to the adhesive for formation of the connection.
  • MgZn 2 , Mg 2 Zn 11 , in the binary and/or ternary eutectic not only can a simple method for preparation of a protectively coated substrate for an adhesive connection be created, but rather, adhesion suitability can also be clearly improved.
  • the method according to the invention can therefore particularly be characterized in that the protectively coated substrate is subjected to such pickling treatment, that at most parts (particularly the intermetallic Zn—Mg phase) are removed at least from the surface of the multi-phase protective coating, and that therefore a surface structure and reaction surface of the protective coating form, which can ensure better binding of an adhesive to the protective coating or, subsequently, to the substrate.
  • a stable connection with an adhesive can be ensured even in the case of steel strip coated at least with zinc and magnesium.
  • adhesion ruptures known in the case of protective coatings comprising zinc and magnesium can be excluded in this way, so that only cohesion ruptures have to be accepted.
  • a substrate treated in this way can therefore be used in automobile construction, even for glued connections.
  • Selective pickling treatment can be made possible, for example, by making use of the different physical, mechanical and/or chemical properties of the intermetallic Zn—Mg phase as compared with the other elements of the protective coating—such as, for example, Zn dendrites.
  • these coatings possibly demonstrate different hardness, brittleness, etc., and the acidic pickle and/or the treatment duration with this acidic pickle can be adjusted to these differences, in order to thereby have a pickling effect essentially on this intermetallic Zn—Mg phase—in other words more as compared with the other elements of the protective coating.
  • the method can be further refined in that an oxide layer of the protective coating is also removed by pickling during the pickling step for selective pickling of the protective coating.
  • the protectively coated substrate can be prepared for its selective pickling, on the one hand, and also, the selective pickling can be carried out. All that is necessary is that an acidic pickle as well as a related pickling duration of this pickling step must be selected in such a manner that these conditions can be met. Furthermore, the method costs can be reduce by means of the use of only one pickling agent.
  • the protective coating is subjected to a pickling treatment essentially directed at MgZn 2 , targeted, selective pickling of the protective coating can be made possible, particularly making use of the brittleness of this Laves phase, without thereby having to fear significant impairment of other microstructure parts.
  • the method according to the invention can therefore be characterized, in addition to the improvement in the adhesion suitability of the substrate, also by its comparatively low removal of material.
  • Pickling particularly directed at the eutectic has proven to be particularly advantageous for the creation of a nano-topography at the surface of the substrate. Specifically, it is possible to penetrate into the depths of the protective coating along the dendritic formation of the eutectic that is close to the surface.
  • binary eutectic (Zn and MgZn 2 ) or ternary eutectic (Zn, Al and MgZn 2 ) of the microstructure of the protective coating can be pickled, whereby the ternary eutectic can be preferred for this, because of its finer structure as compared with the binary eutectic.
  • the protective coating that additionally comprises aluminum is subjected to pickling treatment essentially directed at a eutectic. Specifically, in this way the fine distribution of the particularly ternary eutectic can be utilized to ensure a special surface structure and reaction surface for improved bonding of the adhesive to the protective coating.
  • Acid as a pickle with a pK s value less than 0, can particularly distinguish itself for selective pickling of the intermetallic Zn—Mg phase of the protective coating. Furthermore, a continuous method for surface treatment can be ensured with such an acid strength, something that can be particularly utilized for significant reduction of the time required for the method, particularly in the case of protectively coated steel strips.
  • the pKs value is define as the negative decadic logarithm of K s , the acid constant.
  • a non-oxidizing acid is used as an acid pickle
  • the method can particularly be characterized by a short pickling time and its pickling attack selectively directed at the intermetallic Zn—Mg phase.
  • H 2 SO 4 as an acid can proven itself as advantageous in this connection.
  • a surface structure can also be created in this way, which is characterized by nano-topography at least in certain regions, and this can allow increased adhesion suitability.
  • Particular method conditions can occur if the protective coating is subjected to a pickling duration of 0.5 to 20 seconds with an acid having a concentration of 1 to 20 volume-% (or of 1 to 20 volume percent).
  • Particularly improved method conditions can occur if the protective coating is subjected to a pickling duration of 1 to 15 seconds with an acid having a concentration of 2 to 10 volume-%.
  • the concentration in volume-% lies in the range of 1 to 100, then simple standard operating procedures for the pickling attack on the intermetallic Zn—Mg phase of the protective coating can exist.
  • the oxide layer of the protective coating can also be removed in this way, in simple manner.
  • the standard operating procedures for the pickling attack can be further improved if the product that results from the pickling duration in seconds and the concentration in volume-% lies in the range of 6 to 75.
  • the invention can be characterized in that an acid having a pK, value of less than 0 is used for surface treatment of an object that is corrosion-protected with a multi-phase protective coating, comprising at least zinc and magnesium, particularly steel strip, for improvement of the adhesion strength, with an adhesive.
  • a multi-phase protective coating comprising at least zinc and magnesium, particularly steel strip
  • an adhesive for improvement of the adhesion strength
  • use of an acid for surface treatment can allow a fast method and a high reactive surface for adhesive binding.
  • Advantageous method conditions can furthermore occur if the acid is used for a pickling treatment essentially directed at the eutectic of a protective coating that additionally comprises aluminum.
  • the fine distribution of the ternary eutectic can be distinguished for an improvement of the surface structure and of the reaction surface for a connection with an adhesive.
  • the invention has furthermore set itself the task of creating an object, particularly a steel strip, having improved adhesion suitability for a stable connection.
  • the invention accomplishes the stated task with regard to the object in that the protective coating has a microstructure that is reduced by part of the intermetallic Zn—Mg phase, produced by means of selective pickling of the protective coating.
  • the protective coating has a microstructure that is reduced by the proportion of intermetallic Zn—Mg phase, not only can a particular surface structure with nano-topography be made possible for adhesive bonding, but also, this surface can additionally be characterized by an improved reaction and adsorption surface for the adhesive.
  • a Zn—Mg surface with sufficient binding surface area can thereby be made available to an adhesive—without additional measures—particularly since, as compared with known Zn—Mg surfaces, an increased hydroxide characterization can advantageously be utilized for improved chemical binding. Therefore a stable connection with an adhesive, particularly of a steel strip with an adhesive, cannot be ensured.
  • Simple design conditions and improved binding properties with an adhesive can occur if the protective coating has a microstructure reduced by the MgZn 2 component.
  • the surface of the object can be prepared for an adhesive connection in further improved manner if the protective coating, which additionally comprises aluminum, has a microstructure reduced by the proportion of eutectic.
  • the protective coating which additionally comprises aluminum
  • reduction by the ternary eutectic can distinguish itself for this purpose, because of its fine structuring or distribution as compared with the binary eutectic.
  • FIG. 1 a transverse microsection of a microstructure of a steel strip coated with zinc-magnesium
  • FIG. 2 an enlarged microsection of the steel strip according to FIG. 1 , treated according to the method according to the invention
  • FIG. 3 a top view of the steel strip according to FIG. 2 .
  • FIG. 1 a layer structure of a steel strip 1 coated at least with zinc-magnesium for corrosion protection is shown in transverse microsection, as an example.
  • Various methods are known from the state of the art for application of such a protective coating 2 , whereby during these methods, a multi-phase coating of zinc 3 and intermetallic Zn—Mg phases 4 forms because of the low miscibility of zinc and magnesium and because of the rapid solidification of the protective coating.
  • This intermetallic Zn—Mg phase 4 can be present in different arrangements and characterizations, namely as an MgZn 2 layer 5 , particularly characterized by a clod shape, on the surface of the Zn—Mg coating, or as a eutectic 6 , 7 , which can be the case, for example, as a binary eutectic 6 (zinc and MgZn 2 ) or as a ternary eutectic (zinc, aluminum, and MgZn 2 ).
  • an aluminum phase 8 can exist.
  • the intermetallic Zn—Mg phase 4 reaches all the way to the surface of the protective coating 2 , whereby the protective coating 2 forms an oxide layer 9 , at least in part.
  • This oxide layer 9 can primarily comprise Mg oxide, Al oxide, and Mg—Al oxide, and can have a smaller proportion of Zn oxide.
  • the protective coating 2 is subjected to a pickling treatment essentially directed at at least one intermetallic Zn—Mg phase 4 (MgZn 2 ), using an acidic pickle.
  • the intermetallic Zn—Mg phase 4 is therefore reduced to a greater degree, as compared with other parts of the microstructure of the protective coating 2 , so that a nano-topography 11 can form by means of this selective pickling of the Zn—Mg phase 4 that is close to the surface, as can be seen in FIG. 3 as a top view of this protective coating 2 .
  • the increased roughness of the surface of the protective coating 2 can also be seen in FIG. 3 .
  • an acid having a pK s value less than 0 has proven to be advantageous for such selective pickling attack, because in this way, removal by pickling can take place even in one step, also of the oxide layer 9 (hot oxides and/or cold oxides, which cold oxides can be formed, for example, during re-rolling of the surface before the pickling attack).
  • the oxide layer 9 hot oxides and/or cold oxides, which cold oxides can be formed, for example, during re-rolling of the surface before the pickling attack.
  • metal hydroxides 12 for example Zn hydroxides and Mg hydroxides, also form to an increasing degree, thereby allowing improved chemical binding, in addition to the Van-der-Waals bonds between the protective coating 2 or the steel strip 1 and the adhesive 10 .
  • MgZn 2 is present not only as a layer 5 but also in the eutectic 6 , 7 , it is possible to subject the protective coating to a pickling treatment directed at MgZn 2 , for a simple method for the selective reduction of the protective coating 2 and for the formation of Zn and Mg hydroxides 12 .
  • the eutectics 6 , 7 can also be reduced; these can form a relief on a nano scale for improved adhesion suitability, on the basis of the fine MgZn 2 distribution.
  • H 2 SO 4 at a concentration of 2 to 10 volume-% and a pickling duration of 1 to 15 seconds, for example, has proven to be advantageous.
  • An object or a steel strip 1 is coated using a melt-immersion zinc-plating technology, with a composition comprising zinc, 2 wt.-% (or 2 weight-percent) aluminum, and 2 wt.-% magnesium.
  • a multi-phase protective coating 2 forms on the steel strip 1 , as has already been explained in detail in FIG. 1 .
  • the protectively coated substrate 1 can make special results in an improvement of the connection of the adhesive 10 with the protective coating 2 possible during pickling treatment with coordinated parameters with regard to substance amount concentration and pickling duration.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • General Chemical & Material Sciences (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Coating With Molten Metal (AREA)
US13/978,171 2011-01-05 2012-01-05 Method for surface treatment of a protectively coated substrate Abandoned US20130316192A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP11150225.8 2011-01-05
EP11150225A EP2474649A1 (de) 2011-01-05 2011-01-05 Verfahren zur Oberflächenbehandlung eines schutzbeschichteten Substrats
PCT/EP2012/050132 WO2012093150A1 (de) 2011-01-05 2012-01-05 Verfahren zur oberflächenbehandlung eines schutzbeschichteten substrats

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US20130316192A1 true US20130316192A1 (en) 2013-11-28

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US13/978,171 Abandoned US20130316192A1 (en) 2011-01-05 2012-01-05 Method for surface treatment of a protectively coated substrate

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Country Link
US (1) US20130316192A1 (de)
EP (2) EP2474649A1 (de)
JP (1) JP2014501854A (de)
KR (1) KR20130132574A (de)
CN (1) CN103384729A (de)
WO (1) WO2012093150A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019204224A1 (de) * 2019-03-27 2020-10-01 Thyssenkrupp Steel Europe Ag Verfahren zur Neukonditionierung von feuerverzinkten Oberflächen
CN112771204A (zh) * 2018-09-25 2021-05-07 蒂森克虏伯钢铁欧洲股份公司 用于改性热镀锌表面的方法
US11136651B2 (en) 2016-12-23 2021-10-05 Posco Zn-Mg alloy plated steel material having excellent corrosion resistance and plating adhesion

Families Citing this family (5)

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Publication number Priority date Publication date Assignee Title
WO2013160566A1 (fr) 2012-04-25 2013-10-31 Arcelormittal Investigacion Y Desarrollo, S.L. Procédé de réalisation d'une tôle à revêtements znalmg huilés et tôle correspondante.
KR102031466B1 (ko) 2017-12-26 2019-10-11 주식회사 포스코 표면품질 및 내식성이 우수한 아연합금도금강재 및 그 제조방법
DE102021107873A1 (de) 2021-03-29 2022-09-29 Thyssenkrupp Steel Europe Ag Schmelztauchbeschichtetes Stahlblech
DE102022106615A1 (de) * 2022-03-22 2023-09-28 Thyssenkrupp Steel Europe Ag Verfahren zum Modifizieren einer Oberfläche eines schmelztauchbeschichteten Stahlblechs
EP4296399A1 (de) 2022-06-23 2023-12-27 ThyssenKrupp Steel Europe AG Verfahren zur herstellung eines schmelztauchbeschichteten stahlblechs und schmelztauchbeschichtetes stahlblech

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US5747111A (en) * 1995-02-28 1998-05-05 Nisshin Steel Co., Ltd. Steel sheet coated with Zn-Mg binary coating layer excellent in corrosion resistance and manufacturing method thereof
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