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WO2023001696A1 - Matériau composite constitué d'un substrat avec une couche de cuivre favorisant l'adhérence et une couche supérieure contenant du chrome, et son procédé de production - Google Patents

Matériau composite constitué d'un substrat avec une couche de cuivre favorisant l'adhérence et une couche supérieure contenant du chrome, et son procédé de production Download PDF

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Publication number
WO2023001696A1
WO2023001696A1 PCT/EP2022/069779 EP2022069779W WO2023001696A1 WO 2023001696 A1 WO2023001696 A1 WO 2023001696A1 EP 2022069779 W EP2022069779 W EP 2022069779W WO 2023001696 A1 WO2023001696 A1 WO 2023001696A1
Authority
WO
WIPO (PCT)
Prior art keywords
chromium
adhesion
copper
substrate
layer
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.)
Ceased
Application number
PCT/EP2022/069779
Other languages
German (de)
English (en)
Inventor
Marinko VELIMIR
Viktor VELIMIR
Henning de Gruyter
Jörg Cordes
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.)
Velimir & Co Kg GmbH
Original Assignee
Velimir & Co Kg GmbH
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 Velimir & Co Kg GmbH filed Critical Velimir & Co Kg GmbH
Priority to CN202280050557.9A priority Critical patent/CN117677492A/zh
Priority to EP22754007.7A priority patent/EP4263211A1/fr
Publication of WO2023001696A1 publication Critical patent/WO2023001696A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00—Electroplating: Baths therefor
    • C25D3/02—Electroplating: Baths therefor from solutions
    • C25D3/04—Electroplating: Baths therefor from solutions of chromium
    • C25D3/06—Electroplating: Baths therefor from solutions of chromium from solutions of trivalent chromium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
    • 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
    • C25D5/34—Pretreatment of metallic surfaces to be electroplated
    • 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
    • C25D3/00—Electroplating: Baths therefor
    • C25D3/02—Electroplating: Baths therefor from solutions
    • C25D3/38—Electroplating: Baths therefor from solutions of copper

Definitions

  • the present invention relates to a composite material with a chromium-containing top layer, a method for its production and its use in particular in the sanitary sector and/or as a component carrying drinking water.
  • nickel is also deposited in the area of bores inside the fittings. These nickel layers are not completely covered by the subsequent hexavalent chrome plating. When it comes into contact with drinking water, the potential differences between the chromium oxide layer and the nickel layer cause the nickel to dissolve, which can then get into the drinking water. When the drinking water stagnates, nickel levels are measured that are well above the limit values contained in the Drinking Water Ordinance of June 19, 2020. In fact, the limit of 10 pg nickel per fitting is exceeded for most fittings in the dynamic test bench according to DIN 16058.
  • nickel can also escape from nickel-containing sub-layers of other chrome-plated objects and act as a contact allergen, especially from everyday objects that come into contact with the human body or food, such as ballpoint pen clips, grill grates or bread baskets. An increased release of nickel is observed here, particularly in the case of contact with sweat.
  • a common alternative for a nickel underlayer in the jewelry and apparel industry is an alloy layer of white bronze containing the alloying ingredients copper and tin.
  • the disadvantage of this coating is that it has so far been deposited from cyanide electrolytes and the leveling and degree of gloss are limited. Chromium plating in a chromium bath that contains chromium(VI) compounds is often defective.
  • WO 2013/164165 A1 describes composite materials with a chromium top layer that do without a nickel underlayer.
  • the chromium layer is deposited from an electrolyte containing hexavalent chromium.
  • Three further layers are arranged between the chromium cover layer and the substrate, namely a copper-containing first layer on the substrate, an overlying alloy layer made of copper, tin and/or zinc and a third layer overlying this layer containing chromium, copper, gold, palladium or iron.
  • DE 10 2005 041 375 A1 describes a method for producing decorative surface structures on objects, in particular sanitary objects such as fittings and showers, preferably using an intermediate layer containing nickel.
  • decorative surfaces are created on the objects, for example by partially removing a metal coating.
  • the disadvantage of this method is that the deposition takes place from highly toxic, cyanide electrolytes.
  • the object of the present invention to provide an alternative composite material which overcomes the aforementioned disadvantages known from the prior art and is characterized in particular by a simple structure with only a few layers.
  • the composite material according to the invention should preferably also be distinguished by good corrosion properties and an attractive luster of the chromium-containing top layer. Furthermore, an environmentally friendly and non-hazardous method for producing the composite material is to be provided.
  • the invention solves this problem with the features of the claims and in particular with a composite material with a chromium-containing top layer, comprising an adhesion-promoting layer arranged on a substrate and a chromium-containing top layer arranged on the adhesion-promoting layer, the substrate consisting of a material selected from the group is selected, which includes copper, nickel-free copper alloys, copper-coated plastic, copper-coated steel, and copper-coated zinc die-cast products; the adhesion-promoting layer contains at least 99.9% by weight copper; and the adhesion-promoting layer is arranged directly on the substrate and the covering layer is arranged directly on the side of the adhesion-promoting layer opposite the substrate.
  • the composite material is completely free of nickel, i.e. no nickel is contained either in the adhesion-promoting layer or in the chromium-containing top layer. It is very surprising that it is possible to completely dispense with nickel in an underlayer for the chromium-containing top layer, because it is known from the prior art that nickel in the underlayer ensures scratch and abrasion resistance of the overlying chromium-containing layer and this first gives the shine typical of chrome coatings.
  • Composite materials known from the prior art with a chromium top layer that are completely nickel-free have to compensate for the loss in scratch and abrasion resistance and gloss associated with dispensing with nickel through a complex manufacturing process that leads to a multi-layered composite material.
  • the composite material according to the invention requires only two layers on a substrate and has good corrosion properties and a luster that cannot be distinguished from conventional chromium-containing coatings with a nickel-containing underlayer.
  • an adhesion-promoting layer is arranged directly under the chromium-containing top layer, which consists of at least 99.9% by weight and preferably 100% by weight copper.
  • Copper is a metal that is contained in any case in the substrate according to the invention, which consists of copper, a nickel-free copper alloy, copper-coated plastic, copper-coated steel or copper-coated zinc die-cast product.
  • both the substrate and the adhesion-promoting layer as well as the chromium-containing top layer are free of nickel, so that there is no risk of an increased and thus impermissible release of nickel from the composite material and, in particular in the case of components carrying drinking water, there is no risk of nickel being released into the drinking water .
  • the composite material according to the invention therefore readily meets the requirements. ⁇ 17 paragraph 2 of the Drinking Water Ordinance (TrinkwV 2001), i.e. the permissible maximum values specified in this ordinance are undercut by the composite material according to the invention.
  • the composite material according to the invention has excellent corrosion stability, because it shows in dynamic test bench tests according to DIN EN 16058 in stagnant water collected over 4 hours, a release of copper below 0.4 mg/L, a release of chromium below 0.2 mg/L, a release of nickel below 0.1 mg/L, a release of zinc below 5 mg/L and release of lead below 4.0 pg/L. More precise measurement results are given below.
  • the adhesion-promoting layer preferably has a layer thickness of 5-30 ⁇ m, in particular from 10 to 15 ⁇ m.
  • the chromium-containing top layer preferably has a layer thickness of 0.1-0.5 ⁇ m.
  • the composite material according to the invention consists of the substrate, the adhesion-promoting layer and the chromium-containing top layer, with the top layer optionally being passivated.
  • the invention also relates to a method for producing a composite material with a chromium-containing top layer, which comprises or consists of the following steps: a) Pretreating a substrate to be coated, the substrate consisting of a material selected from the group consisting of copper , copper alloys, copper clad plastic, copper clad steel and copper clad zinc die-cast products; b) electrolytic deposition of an adhesion-promoting layer on the pretreated substrate to be coated, the adhesion-promoting layer containing at least 99.9% by weight copper; c) Electrolytic deposition of a chromium-containing cover layer directly on the side of the adhesion-promoting layer opposite the substrate.
  • the step of pretreating the substrate to be coated includes one or more steps selected from the group consisting of degreasing, rinsing, removing superficial buildup, and activating the substrate surface.
  • the substrate can be degreased in particular with the assistance of ultrasound and/or at elevated temperature, preferably for a period of 1-10 minutes.
  • a temperature of 50 to 95°C is suitable, in particular 80 to 90°C.
  • a suitable commercial agent for degreasing with ultrasonic support is the product EKASIT US-90 from KIESOW.
  • degreasing can also take place electrolytically, in particular with movement of the substrate and also at elevated temperature, for example at 35 to 70°C, in particular at 40 to 55°C.
  • a suitable commercial agent for electrolytic degreasing of the substrate is the product SURFACLEAN V-149 from KIESOW.
  • a further preferred step in the pretreatment of a substrate to be coated is the removal of the film, which is preferably carried out while the substrate is being moved and/or at elevated temperature for a period of 1-10 minutes.
  • the temperature during film removal is 50 to 95°C, more preferably 70 to 90°C.
  • a commercial product suitable for film removal is the product EKASIT BTU-20 from KIESOW.
  • Yet another preferred step of pretreating a substrate to be coated is activating the substrate surface. This is particularly preferably done with air being blown in and at room temperature, for example for a period of 1 to 5 minutes.
  • a suitable commercial agent for activating the surface of the substrate is the product Activator 5 from KIESOW.
  • an adhesion-promoting layer is electrolytically deposited on the pretreated substrate in the method according to the invention, which consists of at least 99.9% by weight and preferably completely of copper.
  • the adhesion-promoting layer is preferably deposited on the substrate from a galvanic sulfuric acid copper electrolyte at a temperature of 25 to 35.degree.
  • the copper electrolyte contains in particular 45-50 g/L copper, 65-75 g/L sulfuric acid and 80-160 mg/L chloride.
  • the electrolyte optionally contains additives for grain refinement, for controlling leveling, for controlling the Degree of gloss and/or to adjust the hardness of the adhesion-promoting layer to be deposited.
  • the electrolytic deposition of the adhesion-promoting layer on the substrate is preferably carried out with a current density of 0.5 to 5 A/dm 2 for a period of 15 to 30 minutes, with the substrate being moved in the electrolyte. During this time, the substrate is also preferably repeatedly removed from the electrolyte for short periods of time and then re-immersed.
  • the adhesion-promoting layer is obtained as a high-gloss, nickel-free coating from light to dark red in color, which is distinguished not only by a high degree of gloss, but also by a high degree of leveling and increased surface hardness.
  • the layer produced also has high ductility and an extremely uniform layer thickness distribution and thus forms an excellently suitable sub-layer for the chromium-containing top layer.
  • the chromium-containing cover layer is likewise deposited electrolytically directly on the side of the adhesion-promoting layer opposite the substrate.
  • the deposition preferably takes place from a cyanide-free electrolyte that contains chromium exclusively in the form of chromium(III) compounds and thus dispenses with chromium(VI) compounds that are harmful to health and the environment.
  • the pH of the electrolyte is preferably pH 3 to 5.
  • a commercially available product that can be used as an electrolyte is the product TRISTAR 330 AF from Coventya, which can optionally be modified, in particular by setting a desired pH value.
  • the chromium-containing top layer is preferably deposited at about 50 to 60° C. and for a period of about 5-20 minutes, preferably for a period of 7-15 minutes.
  • the substrate pre-coated with the adhesion-promoting layer is preferably moved and optionally repeatedly removed from the electrolyte for a short time and then immersed again.
  • the chromium-containing top layer is deposited by blowing in air.
  • the chromium-containing top layer obtained in this way which preferably has a layer thickness of 0.1 to 0.5 gm, is characterized by very good scattering on profiled parts and by the fact that even at higher current densities no Burning takes place and the generated chromium-containing top layer does not contain any "veils" or similar.
  • the surface of the chromium-containing cover layer does not contain any chromium(VI) compounds, this optically corresponds to a surface that was deposited from an electrolyte with hexavalent chromium compounds.
  • the method according to the invention has an additional step of passivating the chromium-containing cover layer. This takes place in particular for a period of 1-10 minutes at room temperature or at a slightly elevated temperature, for example at 20-30.degree.
  • the composite material according to the invention is obtained by applying the adhesion-promoting layer to a pretreated substrate and applying the chromium-containing top layer to the adhesion-promoting layer, followed by an optional passivation of the surface of the chromium-containing top layer.
  • This is optionally cleaned, in particular by rinsing with and/or an ultrasonic treatment in deionized water, followed by drying at elevated temperature (40-90° C.) in oil-free air.
  • the composite material produced using the method according to the invention is tarnish-resistant and corrosion-resistant according to DIN EN 248 and, due to the lack of nickel content, cannot trigger any allergies or undesirable skin reactions that are known from composite materials containing nickel.
  • the composite material according to the invention without a nickel-containing underlayer cannot be distinguished in terms of gloss, color and feel from a classic composite material with a chromium-containing top layer, which contains nickel in the layer underneath the chromium-containing top layer and in which the chromium contained in the top layer was deposited from an electrolyte , which contains chromium(VI) compounds.
  • FIG. Figure 2 shows a diagram of the chromium concentration in stagnant water from fittings coated using the method according to the invention
  • Figure 3 shows a diagram of the nickel concentration in stagnant water from fittings coated using the method according to the invention
  • Figure 4 shows a diagram of the zinc concentration in stagnant water from using the method according to the invention coated fittings
  • FIG. 5 shows a diagram of the lead concentration in stagnant water from fittings coated by the method according to the invention.
  • Example 1 Coating of corner valves according to the method according to the invention.
  • Corner valves are valves that are installed under a washbasin and are used to shut off the water supply.
  • the three corner valves chrome-plated according to the invention were then subjected to a dynamic test bench test according to DIN EN 16058 in order to test their corrosion stability. For this purpose, water was let into the angle valves for a period of four hours at weekly intervals over a period of 14 weeks. This so-called stagnant water was then analyzed for its copper, chromium, nickel, zinc and lead content. The results are shown in FIGS. 1 to 5, with the three angle valves chrome-plated according to the invention being listed as test specimens 1 to 3, respectively. Each chart also includes Results for a blank sample with which the water was examined for its metal content without prior stagnation in order to rule out contamination of the test water with the metals in question.
  • the diagram shown in FIG. 1 shows that the copper concentration in the stagnant water increased slightly on average in the first 8 weeks and was around 0.15 mg/L in the last weeks of the observed period.
  • the permissible limit value of copper in drinking water is 2 mg/L, but all three test subjects fell well below this value during the entire observation period. Even a concentration of 0.2 mg/L was only exceeded by one test item and only for a period of approx. 4 weeks, so that only a little copper went into solution from the test items.
  • the diagram shown in FIG. 2 shows that the chromium concentration in the stagnant water was 0 mg/L for almost the entire observed period, i.e. no or almost no chromium goes into solution from the valves coated according to the invention.
  • the diagram shown in FIG. 3 shows that the nickel concentration in the stagnant water increased slightly on average in the first approx. 8 weeks and was approx. 7.0 pg/L in the last weeks of the observed period.
  • the permissible limit value of nickel in drinking water is 0.1 mg/L, but all three test subjects fell well below this limit during the entire observation period.
  • the reason why nickel was found in the stagnant water at all was that the base body used for the angle valves (the substrate that was coated according to the invention) was made of brass. Brass is a recycled material and therefore also contains traces of nickel. Over time, this dissolves in water, which explains the nickel content determined in the stagnant water. No additional nickel pollution for the drinking water can result from the coating according to the invention, since it is completely free of nickel.
  • the diagram shown in FIG. 4 shows that the zinc concentration in the stagnant water increased slightly on average in the first 8 weeks and decreased again in the last few weeks of the period under observation to settle at around 2.5 mg/L. Since the coated substrate (the angle valve) was a substrate made of brass, which is an alloy with the main components copper and zinc, the zinc found in the stagnant water originates from the brass substrate. However, zinc is completely harmless in the concentrations found, which is why the Drinking Water Ordinance does not contain any limit values for zinc in drinking water.
  • the diagram shown in FIG. 5 shows that the lead concentration in the stagnant water increased slightly on average in the first approx. 6 weeks and was approx. 3.0 pg/L in the last weeks of the observed period.
  • the lead found in the stagnant water also comes from the brass substrate as brass contains lead for better machinability.
  • the metal concentration in the drinking water is not increased or not significantly increased by the coating method according to the invention.
  • the copper content released from the adhesion-promoting layer and from the brass substrate is far below the prescribed limit.
  • No or almost no chromium is released from the chromium-containing top layer, and the other metals released come exclusively from the brass substrate, whereby here too all limit values of the drinking water ordinance with regard to the various metals are complied with or are far below.
  • the coating method according to the invention can be used to produce a composite material that visually corresponds to a conventionally coated composite material (with a nickel underlayer and a chromium top layer deposited from a hexavalent chromium electrolyte), but does not, like this, meet the limit values prescribed in the Drinking Water Ordinance, in particular for the nickel concentration in drinking water , exceeds.
  • the corrosion resistance of a material or a protective layer on it can be determined with a salt spray test according to DIN EN ISO 9227.
  • test specimens were in a chamber for a period of 48 hours in which a 5% NaCl solution with a neutral pH was continuously nebulized at a temperature of 35 °C. This mist settled on the test specimens and covered them with a corrosive salt water film.
  • test specimens were rinsed with deionized water and the surface of the specimens was inspected. It was found that the test specimens showed isolated milky spots, which could be wiped off without leaving any residue. None of the test specimens showed any pores, pimples or cracks in the coating. There was also no detachment of the coating.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne un matériau composite comportant une couche supérieure contenant du chrome, comprenant une couche favorisant l'adhérence située sur un substrat et une couche supérieure contenant du chrome située sur la couche favorisant l'adhérence : - le substrat est constitué d'un matériau choisi dans le groupe comprenant le cuivre, les alliages de cuivre sans nickel, les matières plastiques revêtues de cuivre, l'acier revêtu de cuivre et les produits de zinc coulés sous pression revêtus de cuivre; - la couche favorisant l'adhérence contient au moins 99,9 % en poids de cuivre; et - la couche favorisant l'adhérence est située directement sur le substrat et la couche supérieure est située directement sur le côté de la couche favorisant l'adhérence qui est à distance du substrat.
PCT/EP2022/069779 2021-07-17 2022-07-14 Matériau composite constitué d'un substrat avec une couche de cuivre favorisant l'adhérence et une couche supérieure contenant du chrome, et son procédé de production Ceased WO2023001696A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202280050557.9A CN117677492A (zh) 2021-07-17 2022-07-14 由具有增附性铜层的基底和含铬的覆盖层构成的复合材料和其制造方法
EP22754007.7A EP4263211A1 (fr) 2021-07-17 2022-07-14 Matériau composite constitué d'un substrat avec une couche de cuivre favorisant l'adhérence et une couche supérieure contenant du chrome, et son procédé de production

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021118513 2021-07-17
DE102021118513.0 2021-07-17

Publications (1)

Publication Number Publication Date
WO2023001696A1 true WO2023001696A1 (fr) 2023-01-26

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PCT/EP2022/069779 Ceased WO2023001696A1 (fr) 2021-07-17 2022-07-14 Matériau composite constitué d'un substrat avec une couche de cuivre favorisant l'adhérence et une couche supérieure contenant du chrome, et son procédé de production

Country Status (4)

Country Link
EP (1) EP4263211A1 (fr)
CN (1) CN117677492A (fr)
RS (1) RS20240060A1 (fr)
WO (1) WO2023001696A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1126215B (de) * 1954-07-31 1962-03-22 Semotal S A Verfahren zur galvanischen Herstellung von Flachdruckplatten
DE102005041375A1 (de) 2005-08-29 2007-03-01 Hansgrohe Ag Verfahren zur Erzeugung dekorativer Oberflächenstrukturen
EP1826296A1 (fr) * 2006-02-27 2007-08-29 HDO -Druckguss- und Oberflächentechnik GmbH Procédé et dispositif de fabrication d'une pièce coulée sous pression par gaufrage et galvanisation
US20090202862A1 (en) * 2006-06-26 2009-08-13 Liang Chen Electroplated device and preparation method thereof
KR101183947B1 (ko) * 2010-05-14 2012-09-18 (주)지오데코 금속표면처리방법
WO2013164165A1 (fr) 2012-05-02 2013-11-07 Umicore Galvanotechnik Gmbh Revêtement de surface multicouche comprenant une couche de recouvrement en chrome sans couche en nickel
US10900140B2 (en) * 2017-02-13 2021-01-26 Atotech Deutschland Gmbh Method for electrolytically passivating an outermost chromium or outermost chromium alloy layer to increase corrosion resistance thereof

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2427588A2 (fr) * 2009-05-08 2012-03-14 Grohe AG Accessoires sanitaires
EP2460908A1 (fr) * 2010-12-03 2012-06-06 Grohe AG Objet sanitaire
ITBS20120096A1 (it) * 2012-06-26 2013-12-27 C. Procedimento per la realizzazione di un componente di valvolame o di rubinetteria
EP3299497A1 (fr) * 2016-09-27 2018-03-28 ATOTECH Deutschland GmbH Procédé de traitement d'une surface de chromium

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1126215B (de) * 1954-07-31 1962-03-22 Semotal S A Verfahren zur galvanischen Herstellung von Flachdruckplatten
DE102005041375A1 (de) 2005-08-29 2007-03-01 Hansgrohe Ag Verfahren zur Erzeugung dekorativer Oberflächenstrukturen
EP1826296A1 (fr) * 2006-02-27 2007-08-29 HDO -Druckguss- und Oberflächentechnik GmbH Procédé et dispositif de fabrication d'une pièce coulée sous pression par gaufrage et galvanisation
US20090202862A1 (en) * 2006-06-26 2009-08-13 Liang Chen Electroplated device and preparation method thereof
KR101183947B1 (ko) * 2010-05-14 2012-09-18 (주)지오데코 금속표면처리방법
WO2013164165A1 (fr) 2012-05-02 2013-11-07 Umicore Galvanotechnik Gmbh Revêtement de surface multicouche comprenant une couche de recouvrement en chrome sans couche en nickel
US10900140B2 (en) * 2017-02-13 2021-01-26 Atotech Deutschland Gmbh Method for electrolytically passivating an outermost chromium or outermost chromium alloy layer to increase corrosion resistance thereof

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EP4263211A1 (fr) 2023-10-25
RS20240060A1 (sr) 2024-04-30
CN117677492A (zh) 2024-03-08

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