EP1439238A1 - Alliage de laiton résistant à la corrosion pour pièces en contact avec l'eau potable - Google Patents

Alliage de laiton résistant à la corrosion pour pièces en contact avec l'eau potable Download PDF

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Publication number
EP1439238A1
EP1439238A1 EP04000423A EP04000423A EP1439238A1 EP 1439238 A1 EP1439238 A1 EP 1439238A1 EP 04000423 A EP04000423 A EP 04000423A EP 04000423 A EP04000423 A EP 04000423A EP 1439238 A1 EP1439238 A1 EP 1439238A1
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EP
European Patent Office
Prior art keywords
drinking water
brass alloy
parts
arsenic
copper
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
EP04000423A
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German (de)
English (en)
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EP1439238B1 (fr
Inventor
Claus Büttner
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.)
Rehau Automotive SE and Co KG
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Rehau AG and Co
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Publication of EP1439238A1 publication Critical patent/EP1439238A1/fr
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Publication of EP1439238B1 publication Critical patent/EP1439238B1/fr
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • C22C9/04—Alloys based on copper with zinc as the next major constituent

Definitions

  • the invention relates to a corrosion-resistant brass alloy for molded drinking water parts for use in drinking water and / or sanitary installations.
  • Brass alloys are preferably used to produce the molded drinking water parts different copper contents between 57 and 63% and zinc contents between 36 and 40% used in house connection systems for drinking water or sanitary installations come into use. By adding certain alloy components brass alloys are obtained with different properties Be adjusted by these alloy components.
  • the DIN 50930-6 determines the limit values of brass alloys used today for drinking water or sanitary installations and currently sets the maximum values of the Question alloy components and their accompanying elements. It is known to alloy the lead element in percentages by weight from 3 to maximum 4% improved machinability.
  • the materials of the drinking water molded parts are for Drinking water applications in the standards and regulations of DIN 50930-1 bis 50930-6 and in DIN EN 806-2 described in detail and additionally in the Drinking Water Ordinance (TrinkwV) in the version of the announcement from November Named 2000.
  • DrinkwV Drinking Water Ordinance
  • those in the Drinking Water Ordinance apply specified parameter values and with regard to material selection, DIN 50930-6, Page 7 and 8.
  • Corrosion-resistant brass alloys with an alloy composition are from the prior art according to DIN EN 12163 to 12168, group D for drinking water molded parts known, in addition to the dezincification resistance, good machining and Have cold forming properties. These are brass alloys with 61 to 63% copper, 32.9 to 37% zinc, 1.7 to 2.8% lead, and 0.02 to 0.15% Arsenic and remaining alloys such as aluminum, manganese and tin, the each make up a percentage by weight of up to 0.1%.
  • Alloying arsenic inhibits the ⁇ phase of the brass structure reached.
  • These brass alloys have depths of dezincification according to the test specification ISO 6509 can be determined, known from 200 to 400 ⁇ m in practice and thus lead to corrosion-related failures of molded drinking water parts.
  • alloy components as described in DE 44 38 485 C2 and EP 0 506 995 A1 consist of thermally stable dispersoids such as Cr 2 Ta, Dy 2 O 3 , Er 2 O 3 , ZrC, WSi 2 , Yb 2 O 3 , Sm 2 O 3 in a total content of 0.1 to 5%, which have a chip-breaking effect and processing advantages. Due to the manufacturing process, dispersoids are replaced as lead replacements in the form of powders during the casting process. So far, there are no scientifically sound results regarding the physiological effects of these rare earth additives on drinking water and the associated pollution for humans.
  • the invention is based on the object of providing an improved corrosion-resistant brass alloy for molded drinking water parts, which has corrosion resistance to corrosion processes on the water-bearing surfaces of the molded drinking water parts and future quality requirements for the drinking water with regard to the limit values for the entry of corrosion products Fulfills.
  • This object is achieved by a brass alloy with the composition mentioned in claim 1.
  • Advantageous exemplary embodiments of the brass alloy according to the invention are specified in subclaims 2 to 6.
  • the brass alloy according to the invention as claimed in claim 1 is corrosion-resistant and exhibits with regard to crystalline and intergranular stress corrosion cracking and the - also extensive - dezincification resistance none and with regard Pitting on the water-bearing inner surfaces of the drinking water molded parts only minimal / isolated corrosion attack.
  • the copper content was based on the known conventional brass alloys varies in a range from 60 to 69%.
  • This required additional funding of brass alloy components according to the invention such as lead, iron, manganese, Nickel, silicon, chrome, aluminum, arsenic, bismuth, phosphorus, antimony, sulfur, Tellurium, cadmium, selenium, silver, tin as well as beryllium, boron, cobalt, magnesium, titanium and zircon and zinc as the remainder in the stated percentages by weight (% by weight) according to Claim 1, so that the structure of the alloy and the associated overall corrosion behavior is advantageously influenced.
  • Another advantage of the invention is that under practical test conditions, compared to the known brass alloys, no selective corrosion experimentally with drinking water molded parts, consisting of the invention Brass alloy, could be determined.
  • the corrosion characteristic data of the brass alloy according to the invention are therefore more advantageous than brass alloys known and used to date from the prior art for use in drinking water or sanitary installations.
  • Table 1 shows that the brass alloy according to the invention existing drinking water molded parts (sample nos. 3 and 4) no intergranular or exhibit crystalline corrosion / stress corrosion cracking, like the comparative samples (Sample Nos. 1, 2 and 5), consisting of known brass alloys.
  • the pitting / troughing depths are the brass alloy according to the invention with the sample no. 3 and 4 significantly smaller compared to comparative samples 1, 2 and 5, the results for molded drinking water parts, consisting of known brass alloys (e.g. CW602N) show. In particular pitting only occurred occasionally and with maximum depths of 6 to 9 ⁇ m along the examined surface of the drinking water molded part of samples 3 and 4.
  • known brass alloys e.g. CW602N
  • fittings consisting of the brass alloy according to the invention.
  • FIG. 2 shows a microscope image of a fitting, consisting of 200 times magnification from a well-known brass alloy (CW602N), on the water-bearing Inner surface, after 3 months of test use in different water / drinking water with different pH values and temperature loads in the range of 5 to 20 ° C. You can see clear pitting / trough depths and one starting from them - also areal - dezincification, which are marked with A or B. Such areas can be considered over the service life of the drinking water molded parts Leaks and leaks cause these areas to exceed the total material thickness of the drinking water molded part or at connecting areas occur.
  • CW602N well-known brass alloy
  • FIG. 3 shows a microscope image of one from the invention in a 400-fold magnification Brass alloy manufactured fitting on a water-bearing Inner surface, after 3 months of test use in different water / drinking water with different pH values and temperature loads in the range of 5 to 20 ° C. It can be seen that only isolated pitting / trough corrosion (marked with A) occurs, which is significantly lower than in comparison to known tested Brass alloys (see Fig. 2) and is not evenly distributed.
  • FIG. 4 shows a microscope image on the inside surface of a fitting, manufactured according to a known dezincification-resistant brass alloy (CW 602N) and after the ammonia test (DIN 50916). This is clearly a progressive one Grain decay (marked C) along the surface at a depth of up to 65 ⁇ m.
  • CW 602N dezincification-resistant brass alloy
  • DIN 50916 ammonia test
  • FIG. 5a, b show microscope images on the inside surface of a fitting, produced according to the brass alloy according to the invention and after the ammonia test (DIN 50916).
  • Fig. 4 shows the brass alloy according to claim 1 only slight corrosion attack and the first grain layer is still complete received, i.e. intercrystalline and / or crystalline corrosion, in particular Stress corrosion cracking does not occur and grain decay as shown in Fig. 4 (C) shown, is not recognizable.
  • FIG. 6 shows a microscope image magnified 600 times of a known brass alloy after testing for dezincification resistance according to ISO 6509. A corrosion attack of 3 grain layers and more is clearly recognizable, accordingly a dezincification depth of up to 93 ⁇ m.
  • FIG. 7 shows a microscope image of the inventive device enlarged 600 times Brass alloy and test for dezincification resistance according to ISO 6509. In comparison to FIG. 6 there was no dezincification along the inner surface calculated / observed.
  • the brass alloy according to the invention shows overall, compared to known brass alloys (see Fig. 2,4 and 6), one clearly reduced corrosion attack, especially no crystalline and / or intergranular Corrosion / stress corrosion cracking and only partial pitting on the water-bearing inside of molded drinking water parts made from it.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Domestic Plumbing Installations (AREA)
  • Laminated Bodies (AREA)
  • Table Devices Or Equipment (AREA)
  • Prevention Of Electric Corrosion (AREA)
  • Contacts (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
EP04000423A 2003-01-16 2004-01-12 Alliage de laiton résistant à la corrosion pour pièces en contact avec l'eau potable Expired - Lifetime EP1439238B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10301552A DE10301552B3 (de) 2003-01-16 2003-01-16 Korrosionsbeständige Messinglegierung für Trinkwasserformteile
DE10301552 2003-01-16

Publications (2)

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EP1439238A1 true EP1439238A1 (fr) 2004-07-21
EP1439238B1 EP1439238B1 (fr) 2011-04-13

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EP (1) EP1439238B1 (fr)
AT (1) ATE505566T1 (fr)
DE (2) DE10301552B3 (fr)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007134843A2 (fr) * 2006-05-24 2007-11-29 Atotech Deutschland Gmbh Composition de placage métallique et procédé de dépôt de cuivre-zinc-étain appropriés pour fabriquer une photo-pile à film mince
CN101215654B (zh) * 2008-01-04 2010-10-06 宁波博威合金材料股份有限公司 高强度黄铜合金
CN102477498A (zh) * 2010-11-26 2012-05-30 摩登岛股份有限公司 易切削的环保黄铜合金
CN102560190A (zh) * 2012-01-30 2012-07-11 九星控股集团有限公司 一种高锌无铅黄铜合金及制备方法
CN103469004A (zh) * 2013-08-14 2013-12-25 永和流体智控股份有限公司 一种无铅铜合金材料
CN103509967A (zh) * 2013-01-22 2014-01-15 阮媛清 一种重力铸造专用dzr环保黄铜合金锭及其制作工艺
CN103725919A (zh) * 2014-01-03 2014-04-16 安新县华昌合金厂 一种无铅黄铜合金
DE102013003817A1 (de) * 2013-03-07 2014-09-11 Grohe Ag Kupfer-Zink-Legierung für eine Sanitärarmatur sowie Verfahren zu deren Herstellung
CN104087781A (zh) * 2013-04-01 2014-10-08 浙江艾迪西流体控制股份有限公司 一种无铋低铅黄铜合金及其制备方法
CN104087782A (zh) * 2013-04-01 2014-10-08 浙江艾迪西流体控制股份有限公司 一种低铅黄铜合金及其制备方法
CN104722901A (zh) * 2013-12-24 2015-06-24 财团法人金属工业研究发展中心 无铅黄铜的焊接方法
CN105400987A (zh) * 2015-11-10 2016-03-16 太仓捷公精密金属材料有限公司 一种铜合金材料
CN110117736A (zh) * 2019-06-17 2019-08-13 上海理工大学 一种塑性好耐腐蚀的铋黄铜合金
CN111101017A (zh) * 2019-12-31 2020-05-05 黑龙江北鸥卫浴用品有限公司 耐腐蚀低铅黄铜合金、黄铜铸件及其制备方法
DE102020128955A1 (de) 2020-11-03 2022-05-05 Aurubis Stolberg Gmbh & Co. Kg Messinglegierung

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013004081B4 (de) * 2013-03-11 2023-06-07 Hansa Metallwerke Ag Sanitärer Armaturenkörper
CN106011532B (zh) * 2016-06-30 2018-05-22 宁波金田铜业(集团)股份有限公司 饮用水输配专用环保黄铜合金及其制备方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0506995A1 (fr) 1991-03-30 1992-10-07 Toyo Brass Co. Ltd. Alliage utilisable pour systèmes d'adduction d'eau et présentant des propriétés améliorées pour l'usinabilité et la mise en forme
EP0663452A2 (fr) * 1994-01-17 1995-07-19 Kitz Corporation Alliage à base de cuivre
DE4438485C2 (de) 1994-10-28 1998-05-20 Wieland Werke Ag Verwendung einer Kupfer-Zink-Legierung für Trinkwasserinstallationen
EP1273671A1 (fr) * 2001-07-05 2003-01-08 Diehl Metall Stiftung & Co. KG Alliage cuivre-zinc résistant à la dezincification et son procédé de fabrication

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19722827A1 (de) * 1997-05-30 1998-12-03 Diehl Stiftung & Co Verwendung einer Messinglegierung für Sanitärrohre
DE10158130C1 (de) * 2001-11-27 2003-04-24 Rehau Ag & Co Verwendung einer korrosionsbeständigen Kupfer-Zink-Legierung für Trinkwasserformteile

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0506995A1 (fr) 1991-03-30 1992-10-07 Toyo Brass Co. Ltd. Alliage utilisable pour systèmes d'adduction d'eau et présentant des propriétés améliorées pour l'usinabilité et la mise en forme
EP0663452A2 (fr) * 1994-01-17 1995-07-19 Kitz Corporation Alliage à base de cuivre
DE4438485C2 (de) 1994-10-28 1998-05-20 Wieland Werke Ag Verwendung einer Kupfer-Zink-Legierung für Trinkwasserinstallationen
EP1273671A1 (fr) * 2001-07-05 2003-01-08 Diehl Metall Stiftung & Co. KG Alliage cuivre-zinc résistant à la dezincification et son procédé de fabrication

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"Copper and Copper Alloys Compositions, Applications and Properties", February 1998, COPPER DEVELOPMENT ASSOCIATION, XP002277293 *

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007134843A2 (fr) * 2006-05-24 2007-11-29 Atotech Deutschland Gmbh Composition de placage métallique et procédé de dépôt de cuivre-zinc-étain appropriés pour fabriquer une photo-pile à film mince
WO2007134843A3 (fr) * 2006-05-24 2008-11-27 Atotech Deutschland Gmbh Composition de placage métallique et procédé de dépôt de cuivre-zinc-étain appropriés pour fabriquer une photo-pile à film mince
CN101522954B (zh) * 2006-05-24 2011-11-16 埃托特克德国有限公司 金属电镀组合物和用于沉积适合于生产薄膜太阳能电池的铜-锌-锡的方法
US9263609B2 (en) 2006-05-24 2016-02-16 Atotech Deutschland Gmbh Metal plating composition and method for the deposition of copper—zinc—tin suitable for manufacturing thin film solar cell
CN101215654B (zh) * 2008-01-04 2010-10-06 宁波博威合金材料股份有限公司 高强度黄铜合金
CN102477498A (zh) * 2010-11-26 2012-05-30 摩登岛股份有限公司 易切削的环保黄铜合金
CN102560190A (zh) * 2012-01-30 2012-07-11 九星控股集团有限公司 一种高锌无铅黄铜合金及制备方法
CN102560190B (zh) * 2012-01-30 2013-09-18 九星控股集团有限公司 一种高锌无铅黄铜合金及制备方法
CN103509967B (zh) * 2013-01-22 2016-04-27 阮媛清 一种重力铸造专用dzr环保黄铜合金锭及其制作工艺
CN103509967A (zh) * 2013-01-22 2014-01-15 阮媛清 一种重力铸造专用dzr环保黄铜合金锭及其制作工艺
WO2014135181A1 (fr) * 2013-03-07 2014-09-12 Grohe Ag Alliage cuivre-zinc pour une robinetterie sanitaire, et procédé de fabrication de ladite robinetterie
WO2014135180A1 (fr) * 2013-03-07 2014-09-12 Grohe Ag Alliage cuivre-zinc pour une robinetterie sanitaire, et procédé de fabrication de ladite robinetterie
DE102013003817A1 (de) * 2013-03-07 2014-09-11 Grohe Ag Kupfer-Zink-Legierung für eine Sanitärarmatur sowie Verfahren zu deren Herstellung
CN104087781B (zh) * 2013-04-01 2016-12-28 台州艾迪西投资有限公司 一种无铋低铅黄铜合金及其制备方法
CN104087782A (zh) * 2013-04-01 2014-10-08 浙江艾迪西流体控制股份有限公司 一种低铅黄铜合金及其制备方法
CN104087781A (zh) * 2013-04-01 2014-10-08 浙江艾迪西流体控制股份有限公司 一种无铋低铅黄铜合金及其制备方法
CN103469004B (zh) * 2013-08-14 2015-12-02 永和流体智控股份有限公司 一种无铅铜合金材料
CN103469004A (zh) * 2013-08-14 2013-12-25 永和流体智控股份有限公司 一种无铅铜合金材料
CN104722901A (zh) * 2013-12-24 2015-06-24 财团法人金属工业研究发展中心 无铅黄铜的焊接方法
CN103725919A (zh) * 2014-01-03 2014-04-16 安新县华昌合金厂 一种无铅黄铜合金
CN105400987A (zh) * 2015-11-10 2016-03-16 太仓捷公精密金属材料有限公司 一种铜合金材料
CN110117736A (zh) * 2019-06-17 2019-08-13 上海理工大学 一种塑性好耐腐蚀的铋黄铜合金
CN110117736B (zh) * 2019-06-17 2021-11-19 上海理工大学 一种塑性好耐腐蚀的铋黄铜合金
CN111101017A (zh) * 2019-12-31 2020-05-05 黑龙江北鸥卫浴用品有限公司 耐腐蚀低铅黄铜合金、黄铜铸件及其制备方法
DE102020128955A1 (de) 2020-11-03 2022-05-05 Aurubis Stolberg Gmbh & Co. Kg Messinglegierung

Also Published As

Publication number Publication date
DE10301552B3 (de) 2004-06-24
DE502004012390D1 (de) 2011-05-26
EP1439238B1 (fr) 2011-04-13
ATE505566T1 (de) 2011-04-15

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