EP2215286A1 - Préparation d'éléments d'amenée d'eau à partir d'alliages de laiton à libération limitée d'ions métal - Google Patents

Préparation d'éléments d'amenée d'eau à partir d'alliages de laiton à libération limitée d'ions métal

Info

Publication number
EP2215286A1
EP2215286A1 EP08850224A EP08850224A EP2215286A1 EP 2215286 A1 EP2215286 A1 EP 2215286A1 EP 08850224 A EP08850224 A EP 08850224A EP 08850224 A EP08850224 A EP 08850224A EP 2215286 A1 EP2215286 A1 EP 2215286A1
Authority
EP
European Patent Office
Prior art keywords
water
copper oxide
oxide layer
brass
component
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.)
Granted
Application number
EP08850224A
Other languages
German (de)
English (en)
Other versions
EP2215286B1 (fr
Inventor
Andreas Fath
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.)
Hansgrohe SE
Original Assignee
Hansgrohe SE
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 Hansgrohe SE filed Critical Hansgrohe SE
Publication of EP2215286A1 publication Critical patent/EP2215286A1/fr
Application granted granted Critical
Publication of EP2215286B1 publication Critical patent/EP2215286B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00—Water main or service pipe systems
    • E03B7/006—Arrangements or methods for cleaning or refurbishing water conduits
    • 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

Definitions

  • the invention relates to a process for the production or supply of water-bearing components made of brass alloys with reduced metal ion release and the corresponding components themselves.
  • Components made of brass alloys are used for very different purposes. Particularly important are those applications in which these components come in contact with water as intended, especially with drinking water. These are in the broadest sense the areas of sanitary technology, water and drinking water production and water treatment.
  • brass alloys are used for the production of water-bearing or water-storing components. Conventional production methods for such components include, for example, drawing, turning, hot pressing (forging) or casting. The corresponding components are then, for example, pipes, valves, fittings and the like.
  • brass alloys In principle, a wide variety of brass alloys can be used for the purposes mentioned. These alloys are known in the art. Particularly noteworthy here are the lead-containing brass alloys, in which case the lead is generally added for better mechanical workability of the components produced therefrom.
  • Such coatings are preferably applied to the so-called decorative surfaces, ie those (outer) surfaces which are accessible to the user of the component, for example the sanitary fitting.
  • the coatings mentioned have either a technical function, eg. B. corrosion protection, or a decorative function, eg. Gloss, or both.
  • the best known example of such coatings is the so-called chrome plating, ie the application of a, usually final, chromium layer on the component. This chromium layer is usually applied by electroplating, wherein below the chromium layer, various other coatings can be located, which usually conclude with a nickel layer.
  • coatings are to be applied only to the decorative surfaces of the component, it is usually unavoidable that such coatings (partially) also deposit in the water-bearing (inner) surfaces of the component. It is said here that these layers “scatter" into the water-carrying parts of the component and their surfaces, and from such interspersed layers, for example, are the nickel ions mentioned above, which can be detected in the water flowing through the component.
  • the object of the invention is to provide a novel method for reducing the release of metal ions from water-bearing components which are manufactured from brass alloys.
  • this method should be easily incorporated into existing production or coating processes for such components, in particular for sanitary fittings.
  • an already completely coated, preferably chrome-plated component should be able to be treated by such a new method.
  • This object is achieved by the method with the features of claim 1 and by the component having the features of claim 13.
  • Preferred embodiments of this method or this component are shown in the dependent claims 2 to 12 or 14 and 15. A new use of a copper oxide layer in the context of the invention claims claim 16.
  • the aforementioned method for producing or providing water-conducting components, which are made of brass alloys and have reduced metal ion release in use, according to the invention is designed such that at least on the surfaces of the components in contact with water in use at least partially a copper oxide layer is formed , This copper oxide layer prevents metal ions from the underlying surfaces from entering the water present in or traversing the device.
  • the components are already chrome-plated on their decorative surfaces when carrying out the method.
  • these may be galvanically applied chromium layers.
  • This procedure has the particular advantage that the method steps according to the invention can be easily integrated into an already existing process sequence.
  • the method according to the invention is designed such that the surfaces of the component which come into contact with water during use are partially provided with a nickel layer.
  • a nickel layer is preferably a galvanically applied nickel layer.
  • the surfaces of the components coated according to the invention are the (inner) exposed brass surfaces. These are those inner surfaces where the original brass material from which the component is made is substantially unchanged, d. H. For example, it is not provided with any coating, for example an interspersed nickel layer. According to the invention, these exposed brass surfaces are then preferably provided completely with the copper oxide layer so that no or essentially no metal ions (copper, zinc, lead and optionally further alloy constituents) can be released from them.
  • At least one oxidizing agent or at least one solution having an oxidizing constituent can be used according to the invention.
  • Such solutions are known in the art.
  • the solution with oxidizing constituent used according to the invention may preferably be an alkaline solution, ie a solution with a pH> 9. In particular, it is a strongly alkaline solution with a pH> 11. It is likewise preferred according to the invention if the oxidizing agent is a halogen compound. Such halogen compounds are generally known to those skilled Oxidationsmit- tel. Accordingly, the halogen compound is, in particular, a so-called halide, preferably an alkali metal halide. These are known to be the corresponding salts of the halogenated acid (HCIO2).
  • an alkaline or strongly alkaline sodium chlorite solution is used in the process according to the invention for the formation of the copper oxide layer.
  • This can be prepared, for example, by introducing sodium hydroxide into an aqueous sodium chlorite solution.
  • concentration ranges for all reagents used according to the invention can be varied within wide limits and can be freely determined by the person skilled in the art, depending on the brass alloy used and the field of application of the component.
  • halogenites in particular chlorites
  • the corresponding salts in particular alkali metal salts
  • the alkalinity of the alkaline or strongly alkaline solution prepared therefrom is then achieved by adding a suitable, for example, solid base, such as sodium hydroxide, for example by adding sodium hydroxide platelets in appropriate concentration to the sodium chlorite solution.
  • a suitable, for example, solid base such as sodium hydroxide
  • sodium hydroxide platelets for example by adding sodium hydroxide platelets in appropriate concentration to the sodium chlorite solution.
  • such a solution according to the invention with oxidizing constituent consists of 10-30% by weight of chlorite, in particular sodium chlorite, 20-40% by weight of hydroxide, in particular sodium hydroxide, and the remainder water.
  • this is CuO (copper (II) oxide).
  • this is a black, resistant layer which forms closed on the corresponding surface and is firmly anchored on this surface.
  • a restriction to the form CuO should not be made. It can not be ruled out that additional Cu 2 O (copper (I) oxide) is additionally formed.
  • the treatment time during which the corresponding reagents are in contact with the corresponding surfaces for forming the copper oxide layer, is basically not critical in the invention.
  • the corresponding periods should usually not exceed several hours.
  • elevated temperatures usually up to 80 0 C, worked.
  • a preferred temperature is, for example, about 70 ° C. to about 80 ° C.
  • typical process times are between a few, for example 5 minutes and a few hours, in particular between 5 minutes and 30 minutes.
  • the layer thicknesses of the copper oxide layer obtained, depending on the treatment, are generally less than 50 .mu.m, whereby higher layer thicknesses can also easily be achieved.
  • the layer thicknesses are less than 25 .mu.m, wherein in particular layer thicknesses between 0.05 .mu.m and 5 .mu.m are more preferred.
  • the inventive method is limited according to claim to water-bearing components made of brass alloys, it is also possible in principle to carry out the method steps according to the invention with copper or copper alloys.
  • components of brass alloys are preferred.
  • this brass alloy may be a leaded brass alloy.
  • the lead contents of such brass alloys are below 10%, preferably below 5%.
  • lead-containing brass alloys CuZn 37 Pb or CuZn 39 Pb 3 .
  • the process according to the invention can be further varied by selecting the oxidizing agent used or the corresponding oxidizing constituent solution.
  • a copper oxide layer is formed, but in addition a Entnickeln and / or a Entzinken takes place.
  • Such dezincing causes the corresponding surfaces in contact with water when used to deplete the surface of zinc and, accordingly, may therefore release less zinc ions into the water / drinking water.
  • Detangling is similarly the removal of nickel layers from the surfaces of the component in contact with water when in use.
  • such nickel layers can be formed by so-called littering in a decorative coating of the outer surfaces, for example a chrome plating.
  • the dezincing and / or the Entnickeln in the process according to the invention can not be realized by additional process steps, but by using an oxidizing agent for the production of the copper oxide layer, which simultaneously causes a deinking and / or a Entnickeln.
  • the invention also comprises a component of a brass alloy, preferably of a lead-containing brass alloy, in which at least partially a copper oxide layer is provided on the surfaces in contact with water when in use.
  • the layer thickness of the copper oxide layer present on the component is preferably less than 50 ⁇ m, in particular less than 25 ⁇ m. Particularly noteworthy are layer thicknesses of the copper oxide layer between 0.05 microns and 5 microns.
  • the component according to the invention is a sanitary object, in particular a water-bearing sanitary object.
  • sanitary fitting d. H. around a mixer or the like.
  • the advantages of the method according to the invention and of the component according to the invention are already evident from the previous embodiments.
  • the copper oxide layer formed on the surfaces of the components in contact with water upon use prevents metal ions from being released from the copper oxide layer itself and from the underlying surface areas.
  • These metal ions are primarily the copper ions and zinc ions which are absolutely necessary in the brass and the ions of the optionally present further alloying metals, in particular lead ions.
  • a further advantage is that the method steps according to the invention are already carried out on a layer coated with additional coatings. seen component, in particular on an already chrome-plated component, can be performed.
  • the method according to the invention can be installed and integrated in already existing process sequences, for example a so-called electroplating, in a simple manner.
  • the surface of the other sample was treated for 10 minutes in a 80 ° C., strongly alkaline sodium chlorite solution.
  • 250 g of sodium chlorite (NaCIO 2 ) and 300 g (sodium hydroxide (NaOH)) were contained per liter of aqueous solution. After this treatment, a copper oxide layer resulted on this surface.
  • the method according to the invention is capable of significantly reducing the metal ion release in water-carrying components through the formed copper oxide layer.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Domestic Plumbing Installations (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Electroplating And Plating Baths Therefor (AREA)

Abstract

L'invention se rapporte à un procédé pour produire ou fabriquer des éléments d'amenée d'eau à partir d'alliages de laiton, tels que des éléments de robinetterie et analogues, qui présentent, en service, une libération limitée d'ions métal. Une couche d'oxyde de cuivre est formée au moins partiellement sur les surfaces qui, en service, viennent en contact avec l'eau. Le procédé peut être également réalisé dans les cas où les éléments adéquats sont déjà chromés sur leurs surfaces décoratives en réalisant le procédé.
EP08850224A 2007-11-12 2008-10-27 Préparation d'éléments d'amenée d'eau à partir d'alliages de laiton à libération limitée d'ions métal Not-in-force EP2215286B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200710055446 DE102007055446A1 (de) 2007-11-12 2007-11-12 Bereitstellung von wasserführenden Bauteilen aus Messinglegierungen mit verringerter Metallionenfreisetzung
PCT/EP2008/009071 WO2009062593A1 (fr) 2007-11-12 2008-10-27 Préparation d'éléments d'amenée d'eau à partir d'alliages de laiton à libération limitée d'ions métal

Publications (2)

Publication Number Publication Date
EP2215286A1 true EP2215286A1 (fr) 2010-08-11
EP2215286B1 EP2215286B1 (fr) 2013-01-16

Family

ID=40379042

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08850224A Not-in-force EP2215286B1 (fr) 2007-11-12 2008-10-27 Préparation d'éléments d'amenée d'eau à partir d'alliages de laiton à libération limitée d'ions métal

Country Status (4)

Country Link
EP (1) EP2215286B1 (fr)
CN (1) CN101855386B (fr)
DE (1) DE102007055446A1 (fr)
WO (1) WO2009062593A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012107243B3 (de) * 2012-08-07 2014-04-03 Ideal Standard International B.V.B.A. Sanitäres Wasserventil mit einem eine antibakterielle Beschichtung aufweisenden Auslaufteil
CN104131278B (zh) * 2013-04-30 2016-08-10 富葵精密组件(深圳)有限公司 黑化药水及电路板的制作方法
DE102020102435A1 (de) * 2020-01-31 2021-08-05 Grohe Ag Gehäuseteil für eine Sanitärarmatur mit einer Korrosionsschutzschicht und Verfahren zur Herstellung eines solchen Gehäuseteils

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DE220915C (fr) * 1909-06-01
US2481854A (en) * 1946-02-14 1949-09-13 Enthone Composition to blacken surfaces of copper and of alloys containing copper
US3198672A (en) * 1960-08-18 1965-08-03 Internat Protected Metals Inc Preparation of cupric oxide surfaces
US3169545A (en) * 1963-03-26 1965-02-16 William J Kolling Apparatus for cleaning pipe systems
JPS5638477A (en) * 1979-09-04 1981-04-13 Nippon Peroxide Co Ltd Formation of cupric oxide coating
JPS60200973A (ja) * 1984-03-23 1985-10-11 Hitachi Cable Ltd 耐食性表面処理銅管
JPS61117282A (ja) 1984-11-09 1986-06-04 Dainichi Nippon Cables Ltd 酸化銅皮膜形成方法
JPS61221378A (ja) * 1985-03-27 1986-10-01 Toho Gas Kk 銅溶解防止方法
ATE45993T1 (de) * 1987-03-07 1989-09-15 Wieland Werke Ag Verfahren zur verbesserung der korrosionsbestaendigkeit von harten bzw. halbharten installationsrohren aus kupfer.
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ES2158118T3 (es) * 1995-08-03 2001-09-01 Europa Metalli Spa Elementos de fontaneria con escasa liberacion de plomo hechos a base de cobre que contienen plomo y procedimiento de fabricacion correspondiente.
DE19533410B4 (de) * 1995-09-09 2005-11-24 Km Europa Metal Ag Verfahren zur Erzeugung einer Schutzschicht an der inneren Oberfläche eines Kupferrohrs sowie Verwendung von Ziehmitteln
DE19819925A1 (de) * 1998-05-05 1999-11-11 Km Europa Metal Ag Verfahren zur Erzeugung einer Schutzschicht auf der inneren Oberfläche eines Kupferrohrs
US6197210B1 (en) * 1998-08-17 2001-03-06 Gerber Plumbing Fixtures Corp. Process for treating brass components to substantially eliminate leachabale lead
DE10132055C2 (de) * 2001-07-05 2003-12-11 Diehl Metall Stiftung & Co Kg Entzinkungsbeständige Kupfer-Zink-Legierung sowie Verfahren zu ihrer Herstellung
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Also Published As

Publication number Publication date
CN101855386A (zh) 2010-10-06
EP2215286B1 (fr) 2013-01-16
WO2009062593A9 (fr) 2010-09-23
CN101855386B (zh) 2012-11-28
WO2009062593A1 (fr) 2009-05-22
DE102007055446A1 (de) 2009-05-14

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