EP3088562B1 - Farbbehandeltes basismaterial und basismaterialfarbbehandlungsverfahren dafür - Google Patents

Farbbehandeltes basismaterial und basismaterialfarbbehandlungsverfahren dafür Download PDF

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EP3088562B1
EP3088562B1 EP14873790.1A EP14873790A EP3088562B1 EP 3088562 B1 EP3088562 B1 EP 3088562B1 EP 14873790 A EP14873790 A EP 14873790A EP 3088562 B1 EP3088562 B1 EP 3088562B1
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Prior art keywords
color
film
wavelength conversion
conversion layer
average thickness
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English (en)
French (fr)
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EP3088562A4 (de
EP3088562A1 (de
Inventor
Hyunju JEONG
Kyoung-Bo Kim
Yon-Kyun Song
Jeong-Hee Lee
Yun Ha Yoo
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Posco Holdings Inc
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Posco Co Ltd
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Priority claimed from KR1020130164045A external-priority patent/KR101543925B1/ko
Priority claimed from KR1020130164044A external-priority patent/KR101543924B1/ko
Priority claimed from KR1020130164046A external-priority patent/KR101543926B1/ko
Priority claimed from KR1020130164047A external-priority patent/KR101584413B1/ko
Application filed by Posco Co Ltd filed Critical Posco Co Ltd
Priority claimed from PCT/KR2014/012926 external-priority patent/WO2015099503A1/ko
Publication of EP3088562A1 publication Critical patent/EP3088562A1/de
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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
    • 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
    • C23C22/00—Chemical 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
    • C23C22/05—Chemical 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
    • C23C22/60—Chemical 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 alkaline aqueous solutions with pH greater than 8
    • 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
    • C23C22/00—Chemical 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
    • C23C22/05—Chemical 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
    • C23C22/60—Chemical 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 alkaline aqueous solutions with pH greater than 8
    • C23C22/62—Treatment of iron 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
    • C23C22/00—Chemical 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
    • C23C22/05—Chemical 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
    • C23C22/60—Chemical 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 alkaline aqueous solutions with pH greater than 8
    • C23C22/64—Treatment of refractory metals 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
    • C23C22/00—Chemical 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
    • C23C22/73—Chemical 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 characterised by the 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
    • C23C22/00—Chemical 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
    • C23C22/82—After-treatment
    • C23C22/83—Chemical 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
    • 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
    • C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
    • C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
    • C23C28/324—Coatings 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 matrix material layer comprising a mixture of at least two metals or metal phases or a metal-matrix material with hard embedded particles, e.g. WC-Me
    • 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
    • C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
    • C23C28/34—Coatings 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

Definitions

  • Magnesium is a metal which belongs to lightweight metals among practical metals, has excellent wear resistance, and is very resistant to sunlight and eco-friendly, but has a difficulty in realizing a metal texture and various colors. Further, since it is a metal having the lowest electrochemical performance and is highly active, when a color treatment is not performed thereon, it may be quickly corroded in air or in a solution, and thus has a difficulty in industrial application.
  • the PVD-sol gel method has a problem in that a texture realized on the surface of the substrate is not the intrinsic texture of magnesium although a metal texture may be realized on the surface of the substrate, and the realization of a variety of colors is difficult. Furthermore, when a color treatment is performed using the anodic oxidation method, there is a problem in that an opaque oxide film is formed on the surface of the substrate, and the realization of the intrinsic texture of metals is not easy.
  • An objective of the present invention is to provide a substrate which maintains a texture and gloss of metals and has a surface color-treated to have a variety of colors including a black color.
  • Another objective of the present invention is to provide a method of color-treating the substrate.
  • one embodiment of the present invention provides a color-treated substrate which has the intrinsic texture and gloss of metal, including:
  • Another embodiment of the present invention provides a method of color-treating a substrate, including:
  • the color-treated substrate according to the present invention maintain a texture and gloss of metals, improves durability of a substrate and uniformly realizes a variety of colors including a blue color, a green color, an achromatic color such as a gray color, a black color on a surface of the substrate, and thus can be usefully used in the fields of building exterior materials, automobile interiors, and particularly electrical and electronic component materials, such as mobile product frames, in which a metal material is used.
  • Color coordinates refer to coordinates in a CIE color space, including color values defined by the Commission International de l'Eclairage (CIE), and any position in the CIE color space may be expressed as three coordinate values of L*, a* and b*.
  • CIE Commission International de l'Eclairage
  • an L* value represents brightness.
  • an a* value represents whether a color at a corresponding color coordinate leans toward a pure magenta color or a pure a green color
  • a b* value represents whether a color at a corresponding color coordinate leans toward a pure yellow color or a pure a blue color.
  • the a* value ranges from -a to +a
  • the maximum a* value (a* max) represents a pure magenta color
  • the minimum a* value (a* min) represents a pure a green color.
  • a* value is negative
  • an a* value is positive
  • the b* value ranges from -b to +b.
  • the maximum b* value (b* max) represents a pure yellow color
  • the minimum b* value (b* min) represents a pure a blue color.
  • b* max represents a pure yellow color
  • b* min represents a pure a blue color.
  • a "black” color refers to a color of which an average color coordinate (L*) with respect to brightness based on CIE color coordinates is 60 or less.
  • the black color may include an achromatic color such as a black color, a grey color, and a black rust color or a black navy color mixed with a green-based color or a blue-based color.
  • a "blue" color refers to a color in which L* is more than 60 and b* is less than 5 in average color coordinates (L*, a*, b*) based on CIE color coordinates.
  • the blue color refers to a color having a low b* value, and specifically, a color having a b* value of less than 5 in the present invention.
  • color coordinates of a* is not particularly limited, the a* may be 20 or less, 15 or less, 10 or less, or 5 or less.
  • Examples of the blue color according to the present invention may include a navy color; a blue color; a light blue color; or a cyan color mixed with a green-based color, which are included in the range of the color coordinates.
  • a "wavelength conversion layer”, as used herein, refers to a layer, including intercalation interface on the surface of the film, for controlling a wavelength of incident light by adjusting reflection, refraction, scattering, diffraction of light, which may serve to minimize additional refraction and/or scattering, in a top coat, of light refracted and/or scattered in a film, and maintain a color developed by the layer by inducing light reflection.
  • a unit “T”, as used herein, represents a thickness of a substrate including magnesium, and is the same as a unit “mm”.
  • the present invention provides a color-treated substrate and a substrate color treatment method therefor.
  • the present invention suggests a substrate which maintains a texture and gloss of metals and is color-treated to have a variety of colors including a black color, and a method of color-treating the substrate.
  • the color-treated substrate according to the present invention maintains a texture and gloss of metals, improves durability of a substrate and uniformly realizes a variety of colors including an achromatic color such as a gray color, a black color on a surface of the substrate by including a nanometer scale film and a wavelength conversion layer which have a specific ratio on the substrate, and thus is usefully used in the fields of building exterior materials, automobile interiors, and particularly electrical and electronic component materials, such as mobile product frames, in which a metal material is used.
  • the average thickness of the film may be less than 80 nm, and specifically, may be 75 nm or less, 70 nm or less, 65 nm or less, 60 nm or less; 50 nm or less, 10 to 55 nm or 25 to 55 nm (refer to Experimental Example 2).
  • an average thickness ratio T film /T ML of the film to the wavelength conversion layer with respect to an arbitrary point A existing on the wavelength conversion layer is in the range of 0.2 to 4.0
  • a blue-based color such as a blue color, a cyan color, a sky blue color
  • L* is more than 60 and b* is less than 5 in average color coordinates of any three points included in an arbitrary area with a width of 1 cm and length of 1 cm existing on the wavelength conversion layer.
  • the average thickness of the film may be in the range of 80 to 140 nm, and specifically, may be 80 to 100 nm, 120 to 140 nm, 110 to 130 nm, 100 to 135 nm or 85 to 135 nm (refer to Experimental Example 2).
  • an average thickness ratio T film /T ML of the film to the wavelength conversion layer with respect to an arbitrary point A existing on the wavelength conversion layer is in the range of 0.7 to 8.5
  • a green-based color such as a yellow-green color; a pale blue-green color, an iron blue color, a green color
  • L* is more than 60
  • a* is -5 or less
  • b* is 5 or more in average color coordinates of any three points included in an arbitrary area with a width of 1 cm and length of 1cm existing on the wavelength conversion layer.
  • the matrix containing magnesium serves to define a basic framework and physical properties of a substrate, and is regarded as a form before the color-treated substrate according to the present invention is subject to a color treatment.
  • the film is formed on the surface of the matrix and functions to scatter or refract light incident to the surface.
  • the wavelength conversion layer is formed on the film and includes an intercalation interface on the surface of the film, and thus scatters and/or refracts light which is refracted and/or scattered in the film; and light reflected on the surface of the matrix again to develop a color on the surface of the matrix.
  • the wavelength conversion layer has to have an average thickness ratio with the film, which satisfies the condition of Expression 1, and have a nanometer scale average thickness in order to develop a color on the surface of the matrix.
  • the average thickness of the wavelength conversion layer is 200 nm or less. More specifically, the average thickness is 190 nm or less; 180 nm or less; 170 nm or less; 160 nm or less; or 150 nm or less.
  • the failure of coloring due to a decrease in the light transmittance of the wavelength conversion layer is prevented by adjusting the average thickness of the wavelength conversion layer to within the above-described range in the present invention.
  • the component or form of the wavelength conversion layer is not particularly limited.
  • the color-treated substrate according to the present invention may further include a top coat formed on the wavelength conversion layer in order to improve scratch resistance and durability of the surface of the substrate.
  • a clear coating agent for forming the top coat is not particularly limited as long as it is a clear coating agent which is applicable to metal coatings. More specifically, a matte clear coating agent or a glossy/matte clear coating agent which is applicable to metal coatings may be exemplified. Further, the top coat may have an excellent adhesiveness with the wavelength conversion layer. Specifically, when the color-treated substrate including the top coat was sprayed with 5 wt% salt water at 35 °C and the adhesiveness thereof was evaluated after 72 hours, the top coat may have a peel rate of 5% or less.
  • a diversity of colors such as an achromatic color such as a black color, a grey color as well as a blue color, a green color is uniformly developed on a surface of a substrate by forming a nanometer scale film and wavelength conversion layer having a specific ratio in the range of 0.1 to 10.
  • the step of forming the film may be performed by immersing the matrix containing magnesium in a hydroxide solution in the color treatment method.
  • any solution including a hydroxyl group may be used as the hydroxide solution, without particular limitation.
  • a solution having one or more selected from the group consisting of NaOH, KOH, Mg(OH) 2 , Ca(OH) 2 and Ba(OH) 2 dissolved therein may be used.
  • the hydroxide solution has an advantage in that the film is uniformly formed on the surface of the substrate in a short time and a developed color has excellent coloring power and clarity (refer to Experimental Example 1).
  • the preparation method according to the present invention may control the thickness of the film formed on the surface of the matrix according to immersion conditions.
  • the thickness of the films formed on matrices may be different even though the matrices were immersed under the same conditions. Accordingly, it is preferable to control the thickness of the film by adjusting immersion conditions according to the thickness of the matrix containing magnesium.
  • the temperature of the hydroxide solution may be in the range of 15 to 200 °C, and specifically, 15 to 50 °C, 15 to 30 °C, 90 to 150 °C, or 95 to 110 °C.
  • the immersion time of the matrix may be 60 minutes or less, and specifically, may be 50 minutes or less, 40 minutes or less, 30 minutes or less, 20 minutes or less, or 15 minutes or less.
  • the step of forming the wavelength conversion layer in the color treatment method may be performed using a method which is generally used in the related field without particular limitation. As a specific example, it may be performed by a method such as vacuum deposition, sputtering, ion plating, ion beam deposition.
  • the method of color treating the substrate according to the present invention substrate may further include one or more steps of: pretreating the surface of the matrix before the step of forming the film; and rinsing after the step of forming the film.
  • the step of pretreating the surface is a step of eliminating contaminants remaining on the surface by treating the surface using an alkaline cleaning solution or grinding the surface before forming the film on the matrix.
  • the alkaline cleaning solution is not particularly limited as long as the solution is generally used to clean a surface of metals, metal oxides or metal hydroxides in the related field.
  • the grinding may be performed by buffing, polishing, blasting, electrolytic polishing, but is not limited thereto.
  • the present step not only contaminants or scale which is present on the surface of the matrix containing magnesium may be removed, but also the speed of forming the film may be controlled by surface energy of the surface and/or surface conditions, specifically, microstructural changes of the surface.
  • the thickness of the film formed on the polished matrix may be different from that of the film formed on the unpolished matrix even though the film is formed on the polished matrix under the same conditions as the film of the unpolished matrix, and each color developed on the surface may be different accordingly.
  • the step of rinsing is a step of eliminating any hydroxide solution remaining on the surface by rinsing the surface of the matrix after the step of immersing the matrix in the hydroxide solution. In this step, additional formation of the film due to any remaining hydroxide solution may be prevented by removing the hydroxide solution remaining on the surface of the matrix.
  • TEM transmission electron microscope
  • a thickness of a matte clear coating layer was about 25 ⁇ m.
  • An average thickness of each of the film and the wavelength conversion layer formed on the matrix was about 150 ⁇ 5 nm and 220 nm, respectively.
  • Magnesium-containing samples with a size of 1 cm ⁇ 1 cm ⁇ 0.4 T were degreased by immersing in an alkaline cleaning solution, and the degreased samples were respectively immersed in a 10 wt% NaOH solution at 100 °C for 40 minutes, 1 hour and 2 hours. Thereafter, the sample was rinsed using distilled water and dried in a drying oven, and colors developed on the surface were evaluated with the naked eye.
  • the sample prepared by immersing in a 10 wt% NaOH solution has a faster coloring speed in comparison with that of a sample prepared by immersing in distilled water as a hydroxide solution. More specifically, the sample prepared by immersing in a 10 wt% NaOH solution was colored to have a silver color after 10 minutes of immersion, and changed to a yellow color, and then colored to have an orange color within 40 minutes. However, in the case of the sample in which the immersion time was 40 minutes, it was determined that a color change amount of the surface was slight and a color difference was not so large as compared to a non-color-treated substrate.
  • the color-treated substrate according to the present invention may develop a diversity of colors such as an achromatic color such as a black color, a grey color as well as a blue color, a green color on the surface of the substrate by forming the nanometer scale film and wavelength conversion layer having a specific ratio, and a color may be selectively developed in accordance with the average thickness of the film.
  • an achromatic color such as a black color, a grey color as well as a blue color
  • a green color on the surface of the substrate by forming the nanometer scale film and wavelength conversion layer having a specific ratio, and a color may be selectively developed in accordance with the average thickness of the film.
  • the color-treated sample of Example 4 having a top coat formed thereon was uniformly sprayed with 5 wt% salt water at 35 °C using a salt spray tester (SST), and surface corrosion resistance of the sample; and adhesiveness between the color-treated substrate and the top coat formed on the surface were evaluated after 72 hours of spraying salt water had passed.
  • the adhesiveness was evaluated using a cross-cut tape test method.
  • the color-treated substrate having the top coat formed thereon according to the present invention has excellent corrosion resistance, and outstanding adhesiveness between the color-treated substrate and the top coat. More specifically, it was determined that no deformation of the surface due to corrosion occurred in the case of the sample having a matte top coat formed thereon in Example 4. Further, as a result of evaluating the adhesiveness of the sample on which a corrosion resistance test was performed, it was determined that the area of the top coat which is detached due to the tape is 5% or less based on the total area of the top coat.
  • the color-treated substrate having a top coat formed thereon according to the present invention has excellent corrosion resistance as well as outstanding adhesiveness between a color-treated substrate and a top coat.
  • the color-treated substrate according to the present invention can maintain a texture of metals and gloss of a substrate, improve durability of the substrate and uniformly realize a variety of colors including a blue color, a green color, an achromatic color such as a black color on the surface of the substrate, and thus can be usefully used in the fields of building exterior materials, automobile interiors, and particularly electrical and electronic component materials, such as mobile product frames, in which a metal material is used.

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  • Chemical & Material Sciences (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Laminated Bodies (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Claims (11)

  1. Farbbehandeltes Substrat, das die intrinsische Textur und den Glanz von Metall aufweist, umfassend:
    eine Matrix, die Magnesium enthält;
    einen Film, der auf der Matrix ausgebildet ist und eine Verbindung enthält, die durch die folgende chemische Formel 1 dargestellt ist; und
    eine Wellenlängenkonversionsschicht, die auf dem Film ausgebildet ist,
    wobei eine mittlere Dicke der Wellenlängenkonversionsschicht 200 nm oder weniger beträgt,
    wobei die Wellenlängenkonversionsschicht ein oder mehrere Element/e umfasst, das bzw. die aus der Gruppe ausgewählt ist bzw. sind, die aus Metallen, darunter Aluminium (Al), Chrom (Cr), Titan (Ti), Gold (Au), Molybdän (Mo), Silber (Ag), Mangan (Mn), Zirkonium (Zr), Palladium (Pd), Platin (Pt), Kobalt (Co), Cadmium (Cd) oder Kupfer (Cu) und Ionen von diesen besteht:

            [Chemische Formel 1]     M(OH)m,

    wobei M ein oder mehrere Element/e umfasst, das bzw. die aus der Gruppe ausgewählt ist bzw. sind, die aus Na, K, Mg, Ca und Ba besteht, und m 1 oder 2 ist,
    wobei eine Bedingung des folgenden Ausdrucks 1 in Bezug auf einen beliebigen Punkt A, der auf der Wellenlängenkonversionsschicht vorhanden ist, erfüllt ist: 0,1 ≤ T film / T ML ≤ 10 ,
    Figure imgb0006
     wobei Tfilm eine mittlere Dicke des Films am Punkt A darstellt und TML eine mittlere Dicke der Wellenlängenkonversionsschicht am Punkt A darstellt.
  2. Farbbehandeltes Substrat nach Anspruch 1, wobei, wenn ein mittleres Dickenverhältnis Tfilm/TML des Films zur Wellenlängenkonversionsschicht in einem Bereich von 0,1 bis 6,0 liegt, und eine mittlere Dicke des Films weniger als 80 nm am beliebigen Punkt A beträgt, der auf der Wellenlängenkonversionsschicht vorhanden ist, L* 60 oder weniger in einer durchschnittlichen CIE Farbkoordinate an drei beliebigen Punkten beträgt, die in einem beliebigen Bereich mit einer Breite von 1 cm und einer Länge von 1 cm enthalten sind, der auf der Wellenlängenkonversionsschicht vorhanden ist.
  3. Farbbehandeltes Substrat nach Anspruch 1, wobei, wenn ein mittleres Dickenverhältnis Tfilm/TML des Films zur Wellenlängenkonversionsschicht in einem Bereich von 0,2 bis 4,0 liegt, und eine mittlere Dicke des Films in einem Bereich von 80 bis 140 nm am beliebigen Punkt A liegt, der auf der Wellenlängenkonversionsschicht vorhanden ist, L* mehr als 60 und b* weniger als 5 in durchschnittlichen CIE Farbkoordinaten an drei beliebigen Punkten beträgt, die in einem beliebigen Bereich mit einer Breite von 1 cm und einer Länge von 1 cm enthalten sind, der auf der Wellenlängenkonversionsschicht vorhanden ist.
  4. Farbbehandeltes Substrat nach Anspruch 1, wobei, wenn ein mittleres Dickenverhältnis Tfilm/TML des Films zur Wellenlängenkonversionsschicht in einem Bereich von 0,7 bis 8,5 liegt, und eine mittlere Dicke des Films mehr als 140 nm und 300 nm oder weniger am beliebigen Punkt A beträgt, der auf der Wellenlängenkonversionsschicht vorhanden ist, L* mehr als 60, a* -5 oder weniger und b* 5 oder mehr in CIE-Durchschnittsfarbkoordinaten an irgendwelchen drei Punkten beträgt, die in einem beliebigen Bereich mit einer Breite von 1 cm und einer Länge von 1 cm enthalten sind, der auf der Wellenlängenkonversionsschicht vorhanden ist.
  5. Farbbehandeltes Substrat nach Anspruch 1, wobei der Film Magnesiumhydroxid (Mg(OH)2) enthält.
  6. Farbbehandeltes Substrat nach Anspruch 1, wobei die Matrix darüber hinaus rostfreien Stahl oder Titan (Ti) enthält.
  7. Verfahren zum Farbbehandeln eines Substrats, welche die intrinsische Textur und den Glanz von Metall aufweist, umfassend:
    einen Schritt zum Ausbilden eines Films auf einer Magnesium enthaltenden Matrix, und der eine Verbindung enthält, die durch die folgende chemische Formel 1 dargestellt ist; und
    einen Schritt zum Ausbilden einer Wellenlängenkonversionsschicht auf dem Film,
    wobei eine mittlere Dicke der Wellenlängenkonversionsschicht 200 nm oder weniger beträgt,
    wobei die Wellenlängenkonversionsschicht ein oder mehrere Element/e umfasst, das bzw. die aus der Gruppe ausgewählt ist bzw. sind, die aus Metallen, darunter Aluminium (Al), Chrom (Cr), Titan (Ti), Gold (Au), Molybdän (Mo), Silber (Ag), Mangan (Mn), Zirkonium (Zr), Palladium (Pd), Platin (Pt), Kobalt (Co), Cadmium (Cd) oder Kupfer (Cu) und Ionen von diesen besteht:

            [Chemische Formel 1]     M(OH)m,

    wobei M ein oder mehrere Element/e umfasst, das bzw. die aus der Gruppe ausgewählt ist bzw. sind, die aus Na, K, Mg, Ca und Ba besteht, und m 1 oder 2 ist,
    wobei eine Bedingung des folgenden Ausdrucks 1 in Bezug auf einen beliebigen Punkt A, der auf der Wellenlängenkonversionsschicht vorhanden ist, erfüllt ist: 0,1 ≤ T film / T ML ≤ 10 ,
    Figure imgb0007
     wobei Tfilm eine mittlere Dicke des Films am Punkt A darstellt und TML eine mittlere Dicke der Wellenlängenkonversionsschicht am Punkt A darstellt.
  8. Verfahren nach Anspruch 7, wobei der Film ausgebildet wird, indem die Magnesium enthaltende Matrix im Schritt des Ausbildens des Films in eine Hydroxidlösung eingetaucht wird.
  9. Verfahren nach Anspruch 8, wobei eine Temperatur der Hydroxidlösung in einem Bereich von 90 bis 200°C liegt und die Eintauchzeit 20 Minuten oder weniger beträgt.
  10. Verfahren nach Anspruch 8, wobei die Hydroxidlösung eine oder mehrere Verbindung/en umfasst, die aus der Gruppe ausgewählt ist bzw. sind, die aus NaOH, KOH, Mg(OH)2, Ca(OH)2 und Ba(OH)2 besteht.
  11. Verfahren nach Anspruch 8, wobei eine Konzentration der Hydroxidlösung in einem Bereich von 1 bis 80 Gew.-% liegt.
EP14873790.1A 2013-12-26 2014-12-26 Farbbehandeltes basismaterial und basismaterialfarbbehandlungsverfahren dafür Active EP3088562B1 (de)

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