EP2290114A1 - Water-guiding component - Google Patents

Water-guiding component Download PDF

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Publication number
EP2290114A1
EP2290114A1 EP09010054A EP09010054A EP2290114A1 EP 2290114 A1 EP2290114 A1 EP 2290114A1 EP 09010054 A EP09010054 A EP 09010054A EP 09010054 A EP09010054 A EP 09010054A EP 2290114 A1 EP2290114 A1 EP 2290114A1
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Prior art keywords
water
alloy
weight
less
copper
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EP09010054A
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German (de)
French (fr)
Inventor
Frank Leistritz
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.)
Gebr Kemper GmbH and Co KG
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Gebr Kemper GmbH and Co KG
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Priority to EP09010054A priority Critical patent/EP2290114A1/en
Publication of EP2290114A1 publication Critical patent/EP2290114A1/en
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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
    • C22C9/02—Alloys based on copper with tin as the next major constituent
    • 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 present invention relates to a water-conducting component with a basic body produced by means of casting.
  • a water-conducting component according to the present invention in particular a fitting, fitting, or pump housing is considered.
  • water-bearing components can also be pipes.
  • a water-conducting component in the context of the present invention basically every casting is considered, which leads water and comes into contact with this.
  • the present invention relates to a development of this water-conducting component, which is made as a casting of a copper alloy.
  • Copper alloys have always been used as gunmetal alloys for the production of water-bearing components. Common representatives are cast bronze alloys according to DIN EN 1982.
  • the gunmetal alloy CuSn5Zn5Pb5 here with between 4 to 6 wt .-% tin, zinc and lead at a level of up to 2.0 wt .-% nickel and up to 0.1% by weight of phosphorus and as admixtures up to 0.3% by weight of iron and up to 0.25% by weight of antimony.
  • this material is characterized by good castability and corrosion resistance to seawater. With regard to the release of metal ions into the water, however, this material must be regarded as unsatisfactory against the background of the future expected limit values.
  • the high lead levy of CuSn5Zn5Pb5 is criticized.
  • the DIN 50 930 T6 in its currently valid version prescribes a proportion of up to 3.0 wt .-% lead.
  • the specified CuSn5Zn5Pb2-b casting alloy should contain between 84 and 88% by weight of copper, not more than 0.6% by weight of nickel, not more than 0.04% by weight of phosphorus, not more than Containing 6.0% by weight of tin and not more than 6.0% by weight of zinc. Tin and zinc are each contained at least 4 wt .-% in the alloy.
  • the machinability of castings made with the alloy one skilled in the art will envision a certain amount of lead, not significantly below the stated upper limit of 3.0% by weight, in the alloy.
  • the GB-1 443 090 discloses a dezincification-enhanced copper alloy having between 80 and 90 weight percent copper, between 6.3 and 17.5 weight percent zinc and between 2.8 and 4.75 weight percent silicon as essential alloying ingredients between 0.03 and 0.05% by weight of arsenic.
  • GB-1 443 090 proposed a heat treatment of the cast parts. In this heat treatment, the cast parts are annealed at temperatures between 600 ° C and 750 ° C for a period of 5 to 10 days and then quenched. This heat treatment is carried out with the aim of obtaining the ⁇ and ⁇ phases to be preferred in view of the corrosion. By quenching in particular the formation of phases is to be avoided, the corrosion resistance is low, so the p- and x-phase.
  • a copper alloy which has up to 10% by weight of aluminum and up to 5% by weight of iron and which is used for the production of water-bearing components of water installations.
  • this alloy shows inadequate corrosion behavior and, in particular, excessive migration of metal ions into the water.
  • manganese alloy alloy As necessary alloy is known from the EP 1 817 438 known.
  • copper alloys are from the CH 148 195 , of the US 2004/0234412 , of the DE 585 002 , of the DE 43 24 008 as well as the WO 94/24325 known.
  • the present invention is based on the problem to provide a water-bearing component, which has a low migration tendency of lead and nickel in the water to be led.
  • the invention wants to specify a water-conducting component made of a corresponding alloy, which has a sufficient tightness with regard to the water to be led.
  • the present invention provides a water-conducting component having the features of claim 1.
  • the component according to the invention consists of an alloy with a lead content and a nickel content of less than 0.1 wt .-%.
  • the only essential alloy constituents besides copper are tin and zinc in the alloy. These three components constitute at least 99.75% by weight of the total alloy.
  • the present invention proposes a high purity copper-tin-zinc alloy which is optimized in its migration properties due to the absence of lead and nickel.
  • the proportions of these two elements are each below a proportion of 0.1 wt .-%.
  • the remaining elements P, Fe, S and Sb are limited by the upper limits specified in claim 1.
  • the iron content can be relatively high at 0.3% by weight. All other ingredients are below a limit that can be considered as an impurity limit.
  • the upper limit for the lead and the nickel content is set to 0.05 wt .-%.
  • lead and nickel are containing not more than 0.02 wt .-% in the alloy.
  • the unavoidable impurities within the alloy are preferably limited to a total of 0.25% by weight.
  • each element contained as an unavoidable impurity in the alloy is contained less than 0.02 wt% therein.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Sliding-Contact Bearings (AREA)

Abstract

The water-conducting component comprises a base body produced by casting, where the base body is made of alloys having tin (4.0-6.0 wt.%), zinc (4.0-6.0 wt.%), lead (less than 0.1 wt.%), nickel (less than 0.1 wt.%), phosphorous (less than 0.04 wt.%), iron (less than 0.3 wt.%), sulfur (less than 0.04 wt.%), antimony (less than 0.1 wt.%) and copper as residue and unavoidable impurities (less than 0.02 wt.%).

Description

Die vorliegende Erfindung betrifft ein wasserführendes Bauteil mit einem mittels Gießen hergestellten Grundkörper. Als wasserführendes Bauteil im Sinne der vorliegenden Erfindung wird insbesondere ein Armaturen-, Fitting-, oder Pumpengehäuse angesehen. Wasserführende Bauteile können aber auch Rohre sein. Als wasserführendes Bauteil im Sinne der vorliegenden Erfindung wird grundsätzlich jedes Gussteil angesehen, welches Wasser führt und mit diesem in Kontakt kommt.The present invention relates to a water-conducting component with a basic body produced by means of casting. As a water-conducting component according to the present invention, in particular a fitting, fitting, or pump housing is considered. But water-bearing components can also be pipes. As a water-conducting component in the context of the present invention, basically every casting is considered, which leads water and comes into contact with this.

Die vorliegende Erfindung betrifft eine Weiterbildung dieses wasserführenden Bauteils, welches als Gussteil aus einer Kupferlegierung hergestellt ist.The present invention relates to a development of this water-conducting component, which is made as a casting of a copper alloy.

Kupferlegierungen werden seit jeher als Rotguss-Legierungen zur Herstellung von wasserführenden Bauteilen eingesetzt. Übliche Vertreter sind Bronze-Guss-Legierungen gemäß DIN EN 1982. Beispielhaft soll hier die Rotguss-Legierung CuSn5Zn5Pb5 mit jeweils zwischen 4 bis 6 Gew.-% Zinn, Zink und Blei bei einem Gehalt von bis zu 2,0 Gew.-% Nickel und bis zu 0,1 Gew.-% Phosphor sowie als Beimengungen bis zu 0,3 Gew.-% Eisen und bis zu 0,25 Gew.-% Antimon genannt werden. Dieser Werkstoff zeichnet sich zwar durch eine gute Gießbarkeit sowie Korrosionsbeständigkeit auch gegenüber Meerwasser aus. Hinsichtlich der Abgabe von Metallionen in das Wasser muss dieser Werkstoff indes vor dem Hintergrund der künftig zu erwartenden Grenzwerte als nicht zufriedenstellend angesehen werden. Hier wird insbesondere die hohe Bleiabgabe von CuSn5Zn5Pb5 bemängelt.Copper alloys have always been used as gunmetal alloys for the production of water-bearing components. Common representatives are cast bronze alloys according to DIN EN 1982. By way of example, the gunmetal alloy CuSn5Zn5Pb5 here with between 4 to 6 wt .-% tin, zinc and lead at a level of up to 2.0 wt .-% nickel and up to 0.1% by weight of phosphorus and as admixtures up to 0.3% by weight of iron and up to 0.25% by weight of antimony. Although this material is characterized by good castability and corrosion resistance to seawater. With regard to the release of metal ions into the water, however, this material must be regarded as unsatisfactory against the background of the future expected limit values. Here, in particular, the high lead levy of CuSn5Zn5Pb5 is criticized.

Im Hinblick auf die mit Blei einhergehende Problematik bei wasserführenden Bauteilen schreibt die DIN 50 930 T6 in ihrer aktuell gültigen Fassung einen Anteil von bis zu 3,0 Gew.-% Blei vor. Nach dieser neuen Norm soll die dort spezifizierte CuSn5Zn5Pb2-b-Gusslegierung zwischen 84 und 88 Gew.-% Kupfer, nicht mehr als 0,6 Gew.-% Nickel, nicht mehr als 0,04 Gew.-% Phosphor, nicht mehr als 6,0 Gew.-% Zinn und nicht mehr als 6,0 Gew.-% Zink enthalten. Zinn und Zink sind mit jeweils mindestens 4 Gew.-% in der Legierung enthalten. Wegen der Zerspanbarkeit der mit der Legierung hergestellten Gussteile wird der Fachmann indes einen gewissen Bleianteil, der nicht wesentlich unter der genannten Obergrenze von 3,0 Gew.-% liegt, in der Legierung vorsehen.With regard to the problem associated with lead in water-bearing components, the DIN 50 930 T6 in its currently valid version prescribes a proportion of up to 3.0 wt .-% lead. According to this new standard, the specified CuSn5Zn5Pb2-b casting alloy should contain between 84 and 88% by weight of copper, not more than 0.6% by weight of nickel, not more than 0.04% by weight of phosphorus, not more than Containing 6.0% by weight of tin and not more than 6.0% by weight of zinc. Tin and zinc are each contained at least 4 wt .-% in the alloy. However, because of the machinability of castings made with the alloy, one skilled in the art will envision a certain amount of lead, not significantly below the stated upper limit of 3.0% by weight, in the alloy.

Mit der EP 1 045 041 ist bereits eine bleifreie Kupferlegierung vorgeschlagen worden, die eine zufriedenstellende Zerspanbarkeit aufweisen soll und welche bis zu 79 Gew.-% Kupfer, zwischen 2 und 4 Gew.-% Silizium und als Rest Zink aufweist. Diese Legierung kommt speziell zur Herstellung von Armaturen, Fittings und dergleichen Teile für wasserführende Rohrleitungssysteme in Frage. Die Legierung verhält sich indes insbesondere im Hinblick auf die Korrosionsbeständigkeit nicht wie Rotguss und kann folglich diesen nicht substituieren.With the EP 1 045 041 For example, a lead-free copper alloy having a satisfactory machinability and having up to 79% by weight of copper, from 2 to 4% by weight of silicon and the balance of zinc has been proposed. This alloy comes specifically for the manufacture of fittings, fittings and the like parts for water-bearing piping systems in question. However, the alloy does not behave like gunmetal, particularly with regard to corrosion resistance, and consequently can not substitute it.

Die GB-1 443 090 offenbart eine im Hinblick auf Entzinkung verbesserte Kupferlegierung mit zwischen 80 und 90 Gew.-% Kupfer, zwischen 6,3 und 17,5 Gew.-% Zink und zwischen 2,8 und 4,75 Gew.-% Silizium als wesentliche Legierungsbestandteile mit zwischen 0,03 und 0,05 Gew.-% Arsen. Zur Verbesserung der Korrosionseigenschaften wird nach dem Lösungsvorschlag der GB-1 443 090 eine Wärmebehandlung der gegossenen Teile vorgeschlagen. Bei dieser Wärmebehandlung werden die gegossenen Teile bei Temperaturen zwischen 600°C und 750°C über die Dauer von 5 bis 10 Tagen geglüht und nachfolgend abgeschreckt. Diese Wärmebehandlung wird mit dem Ziel durchgeführt, die im Hinblick auf die Korrosion zu bevorzugende α- und ξ-Phase zu erhalten. Durch das Abschrecken soll insbesondere die Ausbildung von Phasen vermieden werden, deren Korrosionswiderstand gering ist, so der p- und x-Phase.The GB-1 443 090 discloses a dezincification-enhanced copper alloy having between 80 and 90 weight percent copper, between 6.3 and 17.5 weight percent zinc and between 2.8 and 4.75 weight percent silicon as essential alloying ingredients between 0.03 and 0.05% by weight of arsenic. To improve the corrosion properties is proposed by the proposed solution GB-1 443 090 proposed a heat treatment of the cast parts. In this heat treatment, the cast parts are annealed at temperatures between 600 ° C and 750 ° C for a period of 5 to 10 days and then quenched. This heat treatment is carried out with the aim of obtaining the α and ξ phases to be preferred in view of the corrosion. By quenching in particular the formation of phases is to be avoided, the corrosion resistance is low, so the p- and x-phase.

Aus der GB-1 385 411 ist eine Kupferlegierung bekannt, die bis zu 10 Gew.-% Aluminium und bis zu 5 Gew.-% Eisen hat und die zur Herstellung von wasserführenden Bauteilen von Wasserinstallationen zum Einsatz kommt. Diese Legierung zeigt indes ein unzureichendes Korrosionsverhalten und insbesondere eine zu hohe Migration von Metallionen in das Wasser.From the GB-1 385 411 For example, a copper alloy is known which has up to 10% by weight of aluminum and up to 5% by weight of iron and which is used for the production of water-bearing components of water installations. However, this alloy shows inadequate corrosion behavior and, in particular, excessive migration of metal ions into the water.

Aus der EP 798 298 ist eine Kupfer-Legierung bekannt, die neben Silizium, Zink und Mangan als notwendige Elemente Aluminium sowie Zinn und als Rest Kupfer sowie unvermeidbare Verunreinigung enthalten soll.From the EP 798 298 is known a copper alloy, which in addition to silicon, zinc and manganese as necessary elements aluminum and tin and the rest of copper and unavoidable impurity should contain.

Eine weitere, ebenfalls Mangan als notwendige Legierungskomponente bekannte Legierung, ist aus der EP 1 817 438 bekannt.Another, also known as manganese alloy alloy as necessary alloy is known from the EP 1 817 438 known.

Weitere Kupfer-Legierungen sind aus der CH 148 195 , der US 2004/0234412 , der DE 585 002 , der DE 43 24 008 sowie der WO 94/24325 bekannt.Other copper alloys are from the CH 148 195 , of the US 2004/0234412 , of the DE 585 002 , of the DE 43 24 008 as well as the WO 94/24325 known.

Der vorliegenden Erfindung liegt das Problem zugrunde, ein wasserführendes Bauteil anzugeben, das eine geringe Migrationsneigung von Blei und Nickel in das zu führende Wasser hat. Darüber hinaus will die Erfindung ein wasserführendes Bauteil aus einer entsprechenden Legierung angeben, welches im Hinblick auf das zu führende Wasser eine hinreichende Dichtigkeit aufweist.The present invention is based on the problem to provide a water-bearing component, which has a low migration tendency of lead and nickel in the water to be led. In addition, the invention wants to specify a water-conducting component made of a corresponding alloy, which has a sufficient tightness with regard to the water to be led.

Zur Lösung dieses Problems wird mit der vorliegenden Erfindung ein wasserführendes Bauteil mit den Merkmalen von Anspruch 1 angegeben.To solve this problem, the present invention provides a water-conducting component having the features of claim 1.

Das erfindungsgemäße Bauteil besteht aus einer Legierung mit einem Bleigehalt und einem Nickelgehalt von jeweils unter 0,1 Gew.-%. Als einzige wesentliche Legierungsbestandteile sind neben Kupfer Zinn und Zink in der Legierung enthalten. Diese drei Komponenten bilden wenigstens 99,75 Gew.-% der Gesamtlegierung.The component according to the invention consists of an alloy with a lead content and a nickel content of less than 0.1 wt .-%. The only essential alloy constituents besides copper are tin and zinc in the alloy. These three components constitute at least 99.75% by weight of the total alloy.

Danach wird mit der vorliegenden Erfindung eine hochreine Kupfer-Zinn-Zink-Legierung vorgeschlagen, die hinsichtlich ihrer Migrationseigenschaften wegen des Fehlens von Blei und Nickel optimiert ist. Die Anteile dieser beiden Elemente liegen jeweils unterhalb eines Anteils von 0,1 Gew.-%. Die übrigen Elemente P, Fe, S und Sb sind mit den in Anspruch 1 genannten Obergrenzen beschränkt. Der Eisengehalt kann mit 0,3 Gew.-% relativ hoch sein. Alle anderen Bestandteile liegen unterhalb eines Grenzwertes, der als Grenzwert für eine Verunreinigung angesehen werden kann. Vorzugsweise wird die Obergrenze für den Blei- bzw. den Nickelgehalt auf 0,05 Gew.-% festgelegt. Besonders bevorzugt sind Blei und Nickel, jeweils mit nicht mehr als 0,02 Gew.-% in der Legierung enthalten.Thereafter, the present invention proposes a high purity copper-tin-zinc alloy which is optimized in its migration properties due to the absence of lead and nickel. The proportions of these two elements are each below a proportion of 0.1 wt .-%. The remaining elements P, Fe, S and Sb are limited by the upper limits specified in claim 1. The iron content can be relatively high at 0.3% by weight. All other ingredients are below a limit that can be considered as an impurity limit. Preferably, the upper limit for the lead and the nickel content is set to 0.05 wt .-%. Particularly preferred are lead and nickel, each containing not more than 0.02 wt .-% in the alloy.

Die unvermeidbaren Verunreinigungen innerhalb der Legierung sind vorzugsweise auf insgesamt 0,25 Gew.-% beschränkt. Dabei ist jedes einzelne als unvermeidbare Verunreinigung in der Legierung enthaltene Element mit weniger als 0,02 Gew.-% hierin enthalten.The unavoidable impurities within the alloy are preferably limited to a total of 0.25% by weight. Incidentally, each element contained as an unavoidable impurity in the alloy is contained less than 0.02 wt% therein.

Claims (3)

Wasserführendes Bauteil mit einem mittels Gießen hergestellten Grundkörper, bestehend aus folgender Legierung (in Gew.-%): 4 , 0 ≤ Sn ≤ 6 , 0 %
Figure imgb0001
 4 , 0 ≤ Zn ≤ 6 , 0 %
Figure imgb0002
 Pb < 0 , 1 % , Ni < 0 , 1 % , P < 0 , 04 % ,
Figure imgb0003
 Fe < 0 , 3 % , S < 0 , 04 % , Sb < 0 , 1 %
Figure imgb0004
und als Rest Kupfer und unvermeidbare Verunreinigungen.Water-conducting component with a basic body produced by means of casting, consisting of the following alloy (in% by weight): 4 . 0 ≤ sn ≤ 6 . 0 %
Figure imgb0001
 4 . 0 ≤ Zn ≤ 6 . 0 %
Figure imgb0002
 pb < 0 . 1 % . Ni < 0 . 1 % . P < 0 . 04 % .
Figure imgb0003
 Fe < 0 . 3 % . S < 0 . 04 % . sb < 0 . 1 %
Figure imgb0004
 and the remainder copper and unavoidable impurities. Ein wasserführendes Bauteil nach Anspruch 1 ,dadurch gekennzeichnet, dass die unvermeidbaren Verunreinigungen mit nicht mehr als insgesamt 0,25 Gew.-% enthalten sind.A water-conducting member according to claim 1, characterized in that the unavoidable impurities are contained at not more than 0.25% by weight in total. Ein wasserführendes Bauteil nach Anspruch 2, dadurch gekennzeichnet, dass jedes als unvermeidbare Verunreinigung enthaltenes Element mit < 0,02 Gew.-% enthalten ist.A water-conducting component according to claim 2, characterized in that each element contained as unavoidable impurity <0.02 wt .-% is contained.
EP09010054A 2009-08-04 2009-08-04 Water-guiding component Withdrawn EP2290114A1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014008969A1 (en) * 2012-07-12 2014-01-16 Wieland-Werke Ag Formed parts made from corrosion-resistant copper alloys
DE102018004702A1 (en) 2018-06-12 2019-12-12 Gebr. Kemper Gmbh + Co. Kg Metallwerke Moldings made of a corrosion-resistant and machinable copper alloy
CN115679149A (en) * 2022-11-10 2023-02-03 广州番禺职业技术学院 High-brightness high-corrosion-resistance antibacterial decorative tin bronze alloy and preparation method thereof

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH148195A (en) 1930-05-27 1931-07-15 Hirsch Kupfer & Messingwerke Copper-silicon-zinc alloy.
DE585002C (en) 1930-05-28 1933-09-27 Hirsch Kupfer Und Messingwerke Copper-silicon-zinc alloy
GB1385411A (en) 1971-08-11 1975-02-26 Toyo Valve Co Ltd Aluminium-containing copper alloys
GB1443090A (en) 1974-03-25 1976-07-21 Anaconda Co Silicon brass resistant to partin corrosion-
WO1994024325A1 (en) 1993-04-16 1994-10-27 Ideal-Standard Gmbh Brass alloy
DE4324008A1 (en) 1993-07-17 1995-01-19 Kabelmetal Ag Use of a corrosion-resistant alloy based on copper
JPH09111376A (en) * 1995-10-13 1997-04-28 Maezawa Kiyuusou Kogyo Kk Leadless free cutting copper alloy
EP0798298A1 (en) 1994-12-15 1997-10-01 Sankyo Company Limited Thiazolidinone compounds or angina pectoris remedy or preventive containing the same as active ingredient
EP1045041A1 (en) 1998-10-12 2000-10-18 Sambo Copper Alloy Co., Ltd Leadless free-cutting copper alloy
US20040234412A1 (en) 2002-09-09 2004-11-25 Keiichiro Oishi High-strength copper alloy
EP1817438A1 (en) 2005-12-14 2007-08-15 Gebr. Kemper GmbH + Co. KG Metallwerke Low-migration copper alloy

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH148195A (en) 1930-05-27 1931-07-15 Hirsch Kupfer & Messingwerke Copper-silicon-zinc alloy.
DE585002C (en) 1930-05-28 1933-09-27 Hirsch Kupfer Und Messingwerke Copper-silicon-zinc alloy
GB1385411A (en) 1971-08-11 1975-02-26 Toyo Valve Co Ltd Aluminium-containing copper alloys
GB1443090A (en) 1974-03-25 1976-07-21 Anaconda Co Silicon brass resistant to partin corrosion-
WO1994024325A1 (en) 1993-04-16 1994-10-27 Ideal-Standard Gmbh Brass alloy
DE4324008A1 (en) 1993-07-17 1995-01-19 Kabelmetal Ag Use of a corrosion-resistant alloy based on copper
EP0798298A1 (en) 1994-12-15 1997-10-01 Sankyo Company Limited Thiazolidinone compounds or angina pectoris remedy or preventive containing the same as active ingredient
JPH09111376A (en) * 1995-10-13 1997-04-28 Maezawa Kiyuusou Kogyo Kk Leadless free cutting copper alloy
EP1045041A1 (en) 1998-10-12 2000-10-18 Sambo Copper Alloy Co., Ltd Leadless free-cutting copper alloy
US20040234412A1 (en) 2002-09-09 2004-11-25 Keiichiro Oishi High-strength copper alloy
EP1817438A1 (en) 2005-12-14 2007-08-15 Gebr. Kemper GmbH + Co. KG Metallwerke Low-migration copper alloy

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 199727, Derwent World Patents Index; AN 1997-295348 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014008969A1 (en) * 2012-07-12 2014-01-16 Wieland-Werke Ag Formed parts made from corrosion-resistant copper alloys
DE102012013817A1 (en) 2012-07-12 2014-01-16 Wieland-Werke Ag Molded parts made of corrosion-resistant copper alloys
DE102018004702A1 (en) 2018-06-12 2019-12-12 Gebr. Kemper Gmbh + Co. Kg Metallwerke Moldings made of a corrosion-resistant and machinable copper alloy
EP3581667A2 (en) 2018-06-12 2019-12-18 Gebr. Kemper GmbH + Co. KG Metallwerke Moulded parts made from a corrosion resistant and machinable alloy
CN115679149A (en) * 2022-11-10 2023-02-03 广州番禺职业技术学院 High-brightness high-corrosion-resistance antibacterial decorative tin bronze alloy and preparation method thereof
CN115679149B (en) * 2022-11-10 2023-07-28 广州番禺职业技术学院 High-brightness high-corrosion-resistance antibacterial decorative tin bronze alloy and preparation method thereof

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