EP1274567A4 - Plating system for decorative coatings - Google Patents

Plating system for decorative coatings

Info

Publication number
EP1274567A4
EP1274567A4 EP01903000A EP01903000A EP1274567A4 EP 1274567 A4 EP1274567 A4 EP 1274567A4 EP 01903000 A EP01903000 A EP 01903000A EP 01903000 A EP01903000 A EP 01903000A EP 1274567 A4 EP1274567 A4 EP 1274567A4
Authority
EP
European Patent Office
Prior art keywords
layer
coat
nickel
accordance
bright
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.)
Withdrawn
Application number
EP01903000A
Other languages
German (de)
French (fr)
Other versions
EP1274567A1 (en
Inventor
Elmar Tolls
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.)
MacDermid Enthone Inc
Original Assignee
Enthone Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Enthone Inc filed Critical Enthone Inc
Publication of EP1274567A1 publication Critical patent/EP1274567A1/en
Publication of EP1274567A4 publication Critical patent/EP1274567A4/en
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • 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
    • C23C28/322—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer only coatings of metal elements only
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
    • C23C28/023—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
    • C23C28/028—Including graded layers in composition or in physical properties, e.g. density, porosity, grain size
    • 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
    • C23C28/325—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer with layers graded in composition or in physical properties
    • 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
    • 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
    • C23C28/341—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 with at least one carbide layer
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/30—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
    • C23C28/345—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 with at least one oxide layer
    • C23C28/3455—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 with at least one oxide layer with a refractory ceramic layer, e.g. refractory metal oxide, ZrO2, rare earth oxides or a thermal barrier system comprising at least one refractory oxide layer

Definitions

  • the invention refers to a coating system for the decorative layering of work pieces, which can be galvanized.
  • Coating systems of this type are known from the current state of the art, and they are applied especially in the automotive and the furniture manufacturing industry, as well as in the sanitary equipment area.
  • the possible variety of galvano-decorative coatings is in an upward trend, involving the coating of not only basic materials consisting of iron or zinc but also a variety of basic materials such as plastics, for example.
  • the typically possible metallic matte and bright effects are generally covered with a chromium layer, which usually has a blue-silver appearance and therefore fills numerous decorative requirements.
  • coating systems are preferred which contain copper, nickel and chrome or nickel and chrome.
  • the metals forming the protective coat are more noble than the base material, such a system provides corrosion protection since corrosion only occurs if the protective coat has irregularities such as pores or grooves, for example, which extend to the base material. This limited corrosion resistance of the currently known coating systems, however, increasingly no longer can meet the stringent requirements of the automotive industry.
  • the use of a decorative coating has the aim to create an improved over-all appearance.
  • the blue-silver appearing chrome cover coat can be replaced by tin, silver, gold, palladium or rhodium, for example.
  • the disadvantage is that with this type of substitute cover coats neither good corrosion protection nor a high degree of wear resistance can be achieved.
  • a mechanically resistant material coat by means of a vacuum coating process, using mechanically resistant material particles such as titanium or zirconium compounds, for example, and thus creating a cover coat with a higher degree of wear resistance.
  • this problem is s o l v e d by a coating system for decorative coating of work pieces which can be galvanized and which have a bright coat and a discontinuous chrome coat as a base coat, as well as a cover coat of mechanically resistant material which is deposited using the PVD process.
  • the process which is the subject of the invention, proposes first a coating system, which both meets strict requirements for corrosion resistance and also shows a high degree of wear resistance. This is achieved by the galvanic deposition of a discontinuous chrome coat as the base coat to achieve a high degree of corrosion resistance on the one hand and by the formation of a cover coast of mechanically resistant material to achieve a high degree of wear resistance on the other hand.
  • Research by the CNSS test for example, has shown that the corrosion protection achievable with the coating system, which is the subject of the invention fully, meets the requirements of the automotive industry.
  • the coating system which is the subject of the invention also, demonstrates a high degree of wear and abrasion resistance.
  • cover coat In order to achieve an optically attractive over-all appearance, depending on the desired coloration, different mechanically resistant materials can be used to form the cover coat.
  • TiC produces an anthracite colored cover coat
  • ZrN can achieve gold tones in accordance with the gold standard.
  • Various colorations, such as pink or bluish coatings, for example, are possible as surface effects.
  • a galvano- decorative coating is made available which corresponds to today's requirements regarding corrosion and wear resistance and which, at the same time, offers many opportunities for decorative coloration.
  • the discontinuous chrome coat is a layer with micro-cracks or micro-pores.
  • a micro porous chrome coat it is necessary to first form a nickel dispersion layer on the surface of the work piece and to subsequently cover it with a chrome layer.
  • the formation of a micro-porous chrome coat is the result of the nickel dispersion layer.
  • a direct micro-porous chrome deposition has not been possible to date.
  • micro-cracked chrome coats can be produced directly on any nickel coat in a one-step process or with the double chrome plating process.
  • Micro-crack chrome plating can also be produced by the deposition of cracked nickel coats.
  • both the micro-cracked and the micro-porous chrome coat offer excellent corrosion protection which meets strict requirements and which represents an improvement over conventional coating systems.
  • the bright coat is a bright nickel or a pearl bright nickel coat which advantageously shows bright or matte surface effects which can be attuned to the over-all optical appearance.
  • a pearl bright nickel coat non-glaring nickel plating can be achieved which, in contrast to bright nickel plating, forms a surface with a silky, matte appearance.
  • the base coat shows a further nickel layer between the bright coat and the discontinuous chrome layer.
  • This nickel layer is a nickel dispersion coat and serves for the formation of a micro-porous chrome coat.
  • the nickel dispersion coat forms a surface with embedded, non-conducting particles which has the result that when applying a chrome coat, pores are formed at the location of the embedded particles, whereby a micro-porous chrome coat is formed.
  • a chrome coat of this type has the advantage of high corrosion resistance.
  • the base coat has a nickel layer below the bright coat in the direction of thickness, whereby it is advantageous for this to be a coat of sulfur-free, columnar nickel. In this manner a multiple nickel coating system is formed in connection with the bright nickel or the pearl bright nickel coat and the nickel dispersion coat which shows a particularly high resistance to corrosion.
  • the base coat shows a copper layer at the bottom, in the direction of thickness.
  • elements of the IV complex are preferred to be used as mechanically resistant materials, especially titanium, zirconium and hafnium, combinations thereof and/or their nitrides, oxides or carbides.
  • mechanically resistant materials of this type has the advantage that it provides the possibility to form a cover coat, which has a high abrasion resistance and thus a high wear resistance.
  • the coloration of the layered system can be selected and adjusted by the choice of the mechanically resistant materials.
  • the deposition of the cover coat is by gas phase precipitation, whereby it can be differentiated between CVD (chemical vapor deposition) and PVD (physical vapor deposition) processes.
  • the important characteristic of the PVD process here is that a metallic cathode is vaporized as the target and that this metal vapor, in turn, precipitates on the work piece surface under the controlled addition of reaction gases, for example as a nitride or carbide.
  • a coating technology is proposed by the layering system described in the invention which makes possible a great variety of decorative coatings with respect to brightness or matte effects as well as with respect to coloration, and which simultaneously meets the strictest requirements for corrosion and abrasion resistance.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Laminated Bodies (AREA)
  • Physical Vapour Deposition (AREA)

Abstract

The subject of the invention is a layer system for the decorative coating of galvanizable work pieces. In order to have a layer system which meets strict requirements with regard to corrosion resistance and which, at the same time, has a high abrasion resistance and, in addition, provides a high degree of freedom with regard to decorative coloration, the invention proposes a layer system which is formed by galvanic deposition and comprises a base coat consisting of at least one bright layer and one discontinuous chrome layer as well as a cover coat of mechanically resistant materials deposited by the PVD process.

Description

Title: Plating system for decorative coatings
The invention refers to a coating system for the decorative layering of work pieces, which can be galvanized.
Coating systems of this type are known from the current state of the art, and they are applied especially in the automotive and the furniture manufacturing industry, as well as in the sanitary equipment area. The possible variety of galvano-decorative coatings is in an upward trend, involving the coating of not only basic materials consisting of iron or zinc but also a variety of basic materials such as plastics, for example. Of special interest in this connection are the typically possible metallic matte and bright effects. In order to protect against discoloration and corrosion, these matte and bright effect generating layers are generally covered with a chromium layer, which usually has a blue-silver appearance and therefore fills numerous decorative requirements. For the protection of a metallic base material, coating systems are preferred which contain copper, nickel and chrome or nickel and chrome. Provided that the metals forming the protective coat are more noble than the base material, such a system provides corrosion protection since corrosion only occurs if the protective coat has irregularities such as pores or grooves, for example, which extend to the base material. This limited corrosion resistance of the currently known coating systems, however, increasingly no longer can meet the stringent requirements of the automotive industry.
In addition to an improvement of resistance to corrosion, the use of a decorative coating has the aim to create an improved over-all appearance. With respect to coloration, the blue-silver appearing chrome cover coat can be replaced by tin, silver, gold, palladium or rhodium, for example. However, the disadvantage is that with this type of substitute cover coats neither good corrosion protection nor a high degree of wear resistance can be achieved. In order to improve the wear resistance it is known from the current state of the art to form a mechanically resistant material coat by means of a vacuum coating process, using mechanically resistant material particles such as titanium or zirconium compounds, for example, and thus creating a cover coat with a higher degree of wear resistance. Here, two different basic vacuum coating processes exist for the deposition of mechanically resistant material coatings: CVD
(chemical vapor deposition) and PVD (physical vapor deposition). Both processes, however, share the disadvantage of the mechanically resistant material coats in the customary coat thickness range being too porous, and therefore they cannot contribute anything to the corrosion protection of the over-all coating system. Ns a result, even a coating system, which has a mechanically resistant material coat as the cover coat, does not meet the corrosion resistance requirements. Therefore it is the intent of the invention to provide a coating system which avoids the above-mentioned disadvantages and which meets strict corrosion resistance requirements and, at the same time, has a high degree of wear resistance and furthermore offers a variety of choices with regard to the decorative coloration. According to the invention this problem is s o l v e d by a coating system for decorative coating of work pieces which can be galvanized and which have a bright coat and a discontinuous chrome coat as a base coat, as well as a cover coat of mechanically resistant material which is deposited using the PVD process.
The process, which is the subject of the invention, proposes first a coating system, which both meets strict requirements for corrosion resistance and also shows a high degree of wear resistance. This is achieved by the galvanic deposition of a discontinuous chrome coat as the base coat to achieve a high degree of corrosion resistance on the one hand and by the formation of a cover coast of mechanically resistant material to achieve a high degree of wear resistance on the other hand. Research, by the CNSS test for example, has shown that the corrosion protection achievable with the coating system, which is the subject of the invention fully, meets the requirements of the automotive industry. In addition, it turns out that the coating system, which is the subject of the invention also, demonstrates a high degree of wear and abrasion resistance. In order to achieve an optically attractive over-all appearance, depending on the desired coloration, different mechanically resistant materials can be used to form the cover coat. For example, the use of TiC produces an anthracite colored cover coat, and a mixture of TiN and ZrN can achieve gold tones in accordance with the gold standard. Various colorations, such as pink or bluish coatings, for example, are possible as surface effects.
With the coating system, which is the subject of the invention, a galvano- decorative coating is made available which corresponds to today's requirements regarding corrosion and wear resistance and which, at the same time, offers many opportunities for decorative coloration.
In accordance with one characteristic of the invention, the discontinuous chrome coat is a layer with micro-cracks or micro-pores. For the formation of a micro porous chrome coat it is necessary to first form a nickel dispersion layer on the surface of the work piece and to subsequently cover it with a chrome layer. The formation of a micro-porous chrome coat is the result of the nickel dispersion layer. A direct micro-porous chrome deposition has not been possible to date. By contrast, micro-cracked chrome coats can be produced directly on any nickel coat in a one-step process or with the double chrome plating process. Micro-crack chrome plating can also be produced by the deposition of cracked nickel coats. Compared to the one or two-step micro-cracked chrome coating process the cracked nickel electrolyte shows a better control of the crack depth, leading to a more even micro-crack chrome coating. Advantageously, as a discontinuous chrome coat, both the micro-cracked and the micro-porous chrome coat offer excellent corrosion protection which meets strict requirements and which represents an improvement over conventional coating systems.
In accordance with an additional characteristic of the invention, the bright coat is a bright nickel or a pearl bright nickel coat which advantageously shows bright or matte surface effects which can be attuned to the over-all optical appearance. For example, by forming a pearl bright nickel coat, non-glaring nickel plating can be achieved which, in contrast to bright nickel plating, forms a surface with a silky, matte appearance.
In accordance with an additional characteristic of the invention, the base coat shows a further nickel layer between the bright coat and the discontinuous chrome layer. This nickel layer is a nickel dispersion coat and serves for the formation of a micro-porous chrome coat. In this manner, the nickel dispersion coat forms a surface with embedded, non-conducting particles which has the result that when applying a chrome coat, pores are formed at the location of the embedded particles, whereby a micro-porous chrome coat is formed. A chrome coat of this type has the advantage of high corrosion resistance. In accordance with an additional characteristic of the invention, the base coat has a nickel layer below the bright coat in the direction of thickness, whereby it is advantageous for this to be a coat of sulfur-free, columnar nickel. In this manner a multiple nickel coating system is formed in connection with the bright nickel or the pearl bright nickel coat and the nickel dispersion coat which shows a particularly high resistance to corrosion.
In accordance with an additional characteristic of the invention, the base coat shows a copper layer at the bottom, in the direction of thickness.
In accordance with an additional characteristic of the invention, elements of the IV complex are preferred to be used as mechanically resistant materials, especially titanium, zirconium and hafnium, combinations thereof and/or their nitrides, oxides or carbides. The use of mechanically resistant materials of this type has the advantage that it provides the possibility to form a cover coat, which has a high abrasion resistance and thus a high wear resistance. In addition, the coloration of the layered system can be selected and adjusted by the choice of the mechanically resistant materials. The deposition of the cover coat is by gas phase precipitation, whereby it can be differentiated between CVD (chemical vapor deposition) and PVD (physical vapor deposition) processes. The important characteristic of the PVD process here is that a metallic cathode is vaporized as the target and that this metal vapor, in turn, precipitates on the work piece surface under the controlled addition of reaction gases, for example as a nitride or carbide.
In general, a coating technology is proposed by the layering system described in the invention which makes possible a great variety of decorative coatings with respect to brightness or matte effects as well as with respect to coloration, and which simultaneously meets the strictest requirements for corrosion and abrasion resistance.

Claims

Claims
1. A layer system for the decorative coating of galvanizable work pieces, comprising a base coat consisting of at least one bright layer and of a discontinuous chrome layer, formed by a galvanizable deposition, as well as a cover coat consisting of mechanically resistant materials, deposited by means of the PVD process.
2. A layer system in accordance with claim 1, characterized by the discontinuous chrome layer being a micro crack or micro pore coat.
3. A layer system in accordance with claim 1 and 2, characterized by the bright layer being a bright nickel or pearl bright nickel coat.
4. A layer system in accordance with one of the foregoing claims, characterized by the base coat between the bright layer and the discontinuous chrome layer showing a further nickel layer.
5. A layer system in accordance with claim 4, characterized by the additional nickel layer being a nickel dispersion coat.
6. A layer system in accordance with one of the foregoing claims, characterized by the base coat in the direction of thickness showing a third nickel layer below the bright layer.
7. A layer system in accordance with claim 6, characterized by the third nickel layer being a coat consisting of sulfur-less, columnar nickel.
8. A layer system in accordance with one of the foregoing claims, characterized by the base coat showing a copper layer as the lowest layer in the direction of thickness.
9. A layer system in accordance with one of the foregoing claims, characterized by preferably elements of the IV complex being used as mechanically resistant materials, especially titanium, zirconium and hafnium, combinations thereof and/or their nitrides, oxides or carbides.
EP01903000A 2000-02-02 2001-01-26 Plating system for decorative coatings Withdrawn EP1274567A4 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10004555A DE10004555A1 (en) 2000-02-02 2000-02-02 Layer system for decorative coating
DE10004555 2000-02-02
PCT/US2001/000654 WO2001056781A1 (en) 2000-02-02 2001-01-26 Plating system for decorative coatings

Publications (2)

Publication Number Publication Date
EP1274567A1 EP1274567A1 (en) 2003-01-15
EP1274567A4 true EP1274567A4 (en) 2006-04-12

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP01903000A Withdrawn EP1274567A4 (en) 2000-02-02 2001-01-26 Plating system for decorative coatings

Country Status (4)

Country Link
EP (1) EP1274567A4 (en)
AU (1) AU2001230876A1 (en)
DE (1) DE10004555A1 (en)
WO (1) WO2001056781A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004006127A1 (en) * 2004-02-07 2005-08-25 Dr.Ing.H.C. F. Porsche Ag Process for the production of corrosion-resistant and decorative coatings and layer systems for substrates of metals

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US1426325A (en) * 1921-07-11 1922-08-15 Stanis Joseph Air compressor
US4007099A (en) * 1975-10-08 1977-02-08 The Harshaw Chemical Company Cathodic production of micropores in chromium
US4093522A (en) * 1975-01-10 1978-06-06 Horst Dillenberg Electrolytic chromic acid bath for chrome plating
EP0875600A1 (en) * 1997-04-30 1998-11-04 Masco Corporation Coated article
EP0875596A1 (en) * 1997-04-30 1998-11-04 Masco Corporation Article having a decorative and protective coating
EP0890659A2 (en) * 1997-07-09 1999-01-13 Masco Corporation Of Indiana Process for applying protective and decorative coating on an article

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EP1274567A1 (en) 2003-01-15
WO2001056781A1 (en) 2001-08-09
AU2001230876A1 (en) 2001-08-14

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