EP2050581A2 - Verfahren zur Dekoration von Metallartikeln, insbesondere Hähne und Verbindungsstücke - Google Patents

Verfahren zur Dekoration von Metallartikeln, insbesondere Hähne und Verbindungsstücke Download PDF

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Publication number
EP2050581A2
EP2050581A2 EP08166170A EP08166170A EP2050581A2 EP 2050581 A2 EP2050581 A2 EP 2050581A2 EP 08166170 A EP08166170 A EP 08166170A EP 08166170 A EP08166170 A EP 08166170A EP 2050581 A2 EP2050581 A2 EP 2050581A2
Authority
EP
European Patent Office
Prior art keywords
metal item
process according
film template
film
aqueous solution
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP08166170A
Other languages
English (en)
French (fr)
Other versions
EP2050581A3 (de
Inventor
Francesco Di Piano
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.)
Daniel Rubinetterie SpA
Original Assignee
Daniel Rubinetterie SpA
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 Daniel Rubinetterie SpA filed Critical Daniel Rubinetterie SpA
Publication of EP2050581A2 publication Critical patent/EP2050581A2/de
Publication of EP2050581A3 publication Critical patent/EP2050581A3/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/005—Processes, not specifically provided for elsewhere, for producing decorative surface effects by altering locally the surface material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44D—PAINTING OR ARTISTIC DRAWING, NOT OTHERWISE PROVIDED FOR; PRESERVING PAINTINGS; SURFACE TREATMENT TO OBTAIN SPECIAL ARTISTIC SURFACE EFFECTS OR FINISHES
    • B44D5/00—Surface treatment to obtain special artistic surface effects or finishes
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/38—Chromatising
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/02—Electroplating of selected surface areas
    • C25D5/022—Electroplating of selected surface areas using masking means
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/10—Electroplating with more than one layer of the same or of different metals
    • C25D5/12—Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/48—After-treatment of electroplated surfaces
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D7/00—Electroplating characterised by the article coated
    • C25D7/04—Tubes; Rings; Hollow bodies

Definitions

  • the present invention refers to a process for decorating metal articles, in particular taps and fittings.
  • Object of the present invention is to overcome the drawbacks of the prior art by providing a process for decorating metal items, in particular taps and fittings, that is versatile, practical, rapid, cheap and simple to carry out.
  • Another object of the present invention is to provide such a process for decorating metal items that is able to guarantee decorations of a pleasing aesthetic appearance, with different types of chrome finish that remain over time and can be reproduced industrially.
  • the process for decorating metal articles, in particular taps and fitting comprises the following steps:
  • the process starts with a rough metal item, such as, for example, a brass tap 1, which is subjected to surface finishing processes, such as, for example, polishing with a polishing machine 2, so as to obtain a shiny surface 10.
  • a rough metal item such as, for example, a brass tap 1
  • surface finishing processes such as, for example, polishing with a polishing machine 2
  • a film of acid-resistant plastic material 3, such as, for example, polyvinyl chloride (PVC) is selected.
  • the film 3 preferably has an adhesive surface adapted to adhere to a metal material.
  • Cuts 30 are made in said film 3 so as to remove pieces of the film 3 and to form a template.
  • the cuts 30 are made in such a way that the area defined by the perimeter of the cut forms the decorative motif that is to be represented on the metal item 1.
  • the cuts 30 can be made manually, but also automatically, by means of a shearing die or of a punching machine.
  • the tap 1 is cleaned and degreased with industrial detergents and the adhesive film template 3 is applied to the tap 1, so as to cover partially the shiny surface of the tap and to leave portions of shiny surface 10 exposed.
  • the tap 1 with the film template 3 is placed in an electrolyte tank 5 containing a galvanic bath 50 of water and salt able to promote the migration of the metal ions.
  • An anode 51 for example a copper metal bar, is placed in the tank 5, whilst the cathode is represented by the tap 1 to be coated.
  • a potential difference is generated between the anode 51 and the cathode 1 so as to negatively charge the cathode 1 and to start a process of galvanic copper coating, lasting about 3-4 minutes.
  • the positive copper ions (Cu+) migrate in the aqueous solution 50 from the anode 51 to the cathode 1 and are deposited on the areas of the surface 10 of the tap that are not covered by the film 3 and are negatively charged. As a result, areas 11 galvanically coated with copper are obtained, coinciding with the decorations that are to be obtained.
  • the tap 1 is removed from the electrolyte tank 5 and immersed in another burnishing tank 6 to be subjected to a burnishing process lasting about 5 minutes.
  • the tank 6 is filled with an acid solution 60 that has copper oxidising characteristics.
  • the areas of galvanic copper coating 11 that are not covered by the film 3 form a surface oxide layer 12 which gives a darker appearance.
  • the tap 1 is removed from the tank 6 and dried, for example by means of a fan oven 7 ( Figure 1B ) or of jets of hot air.
  • a fan oven 7 Figure 1B
  • the tap 1 is perfectly dry, it is sent to a satin-finishing machine with brushes 8 which carries out the satin finishing of the item.
  • these burnished areas 12 that are not covered by the film 3 are satin finished, so as to take on the appearance of old satin-finished copper.
  • an anode of another metal such as for example chromium, silver, gold or the like can be placed in the galvanic bath 50, to obtain a galvanic coating of a chromium, silver or gold type or the like.
  • the rough metal item 101 is a brass tap that has undergone a surface galvanic chromium-plating treatment 102 by means of a chromium-nickel alloy, so as to obtain a chromium-plated outer surface 110.
  • a film template 3 with negative decorative motifs is applied to the chromium-plated surface 110. That is, the film 3 covers the surface on which the decorative motifs are to be applied and the chromium plating 110 remains exposed on the background.
  • the tap 101 is immersed in a tank 105 containing a solution of acids 150 adapted to eat into the surface chromium. As a result, nickel 111 remains on the background exposed by the film 3.
  • the tap 101 undergoes the same treatments described with reference to Figure 1B , namely drying, satin finishing, removal of the film 3 and application of a transparent varnish. In this manner an end product 101 having chromium-plated decorative motifs on a background 111 of satin-finished nickel is obtained.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemically Coating (AREA)
  • Chemical Treatment Of Metals (AREA)
EP08166170.4A 2007-10-19 2008-10-09 Verfahren zur Dekoration von Metallartikeln, insbesondere Hähne und Verbindungsstücke Withdrawn EP2050581A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT002038A ITMI20072038A1 (it) 2007-10-19 2007-10-19 Procedimento per la decorazione di oggetti metallici, in particolare elementi di rubinetteria

Publications (2)

Publication Number Publication Date
EP2050581A2 true EP2050581A2 (de) 2009-04-22
EP2050581A3 EP2050581A3 (de) 2013-08-14

Family

ID=40313858

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08166170.4A Withdrawn EP2050581A3 (de) 2007-10-19 2008-10-09 Verfahren zur Dekoration von Metallartikeln, insbesondere Hähne und Verbindungsstücke

Country Status (2)

Country Link
EP (1) EP2050581A3 (de)
IT (1) ITMI20072038A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015006574A1 (de) * 2015-05-21 2016-11-24 Audi Ag Verfahren zum Herstellen eines Bauteils für eine Bedieneinrichtung eines Kraftfahrzeugs mit einer teilweise strukturierten Oberfläche
EP3508612A1 (de) * 2018-01-06 2019-07-10 Kohler Co. Mehrfarbige armaturenlackierungen

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3709742A (en) * 1971-02-16 1973-01-09 Re Jo Multi Colour Inc Multi-color anodizing process for aluminum
US3874949A (en) * 1971-08-31 1975-04-01 Riken Light Metal Ind Co Process for decorating an aluminum substrate with a colored design
FR2251632A1 (en) * 1973-11-16 1975-06-13 Cuivre & Alliages Colouring copper (alloy) materials - by etching and heat treating
US20070026205A1 (en) * 2005-08-01 2007-02-01 Vapor Technologies Inc. Article having patterned decorative coating

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015006574A1 (de) * 2015-05-21 2016-11-24 Audi Ag Verfahren zum Herstellen eines Bauteils für eine Bedieneinrichtung eines Kraftfahrzeugs mit einer teilweise strukturierten Oberfläche
EP3508612A1 (de) * 2018-01-06 2019-07-10 Kohler Co. Mehrfarbige armaturenlackierungen
US11065642B2 (en) 2018-01-06 2021-07-20 Kohler Co. Multicolor fixture finishes
US12018398B2 (en) 2018-01-06 2024-06-25 Kohler Co. Multicolor fixture finishes
US12366006B2 (en) 2018-01-06 2025-07-22 Kohler Co. Multicolor fixture finishes

Also Published As

Publication number Publication date
ITMI20072038A1 (it) 2009-04-20
EP2050581A3 (de) 2013-08-14

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