EP1273671A1 - Alliage cuivre-zinc résistant à la dezincification et son procédé de fabrication - Google Patents

Alliage cuivre-zinc résistant à la dezincification et son procédé de fabrication Download PDF

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Publication number
EP1273671A1
EP1273671A1 EP02015027A EP02015027A EP1273671A1 EP 1273671 A1 EP1273671 A1 EP 1273671A1 EP 02015027 A EP02015027 A EP 02015027A EP 02015027 A EP02015027 A EP 02015027A EP 1273671 A1 EP1273671 A1 EP 1273671A1
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Prior art keywords
rest
alloy
copper
soll
ist
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EP02015027A
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German (de)
English (en)
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EP1273671B1 (fr
Inventor
Norbert Dr. Gaag
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Diehl Metall Stiftung and Co KG
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Diehl Metall Stiftung and Co KG
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
    • 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 dezincification-resistant copper-zinc alloy, the especially for sanitary applications, e.g. for drinking water fittings, Drinking water pipes or pipe ties is suitable.
  • the invention further relates a production process for such a copper-zinc alloy.
  • Common copper-zinc alloys also brass or brass alloys called, can occur in two different metallic phases.
  • ⁇ -phase the brass alloy has an fcc (face-centered Cubic) structure, while in the ⁇ -phase a Bcc (Body-Centered - Cubic) structure possesses.
  • fcc face-centered Cubic
  • Bcc Body-Centered - Cubic
  • the phase diagram of a brass alloy comes the pure ⁇ -phase at a copper content of more than 62 wt .-% to.
  • copper between 54 and 62 wt .-% is the brass alloy with shares both the ⁇ and the ⁇ phase.
  • additional Metallic components shift the above phase boundaries.
  • a brass alloy For sanitary applications, a brass alloy must have high corrosion resistance due to the constant water contact. Brass, and also copper, forms cover layers of copper oxide in aqueous, slightly acidic to alkaline electrolyte solutions, which generally provide some protection against general corrosion. In soft, chloride-containing waters, brass alloys may experience a special form of corrosion called dezincification. The zinc is dissolved out of the brass alloy and a porous copper sponge remains behind. Furthermore, the ⁇ -phase is more strongly attacked than the ⁇ -phase, since the former is less electropositive than the latter. To improve the corrosion resistance of a brass alloy, it is therefore known to prevent the formation of a ⁇ -phase as much as possible by means of a heat treatment during production.
  • WO 89/08725 discloses phosphorus, arsenic, antimony, bismuth and silicon.
  • DE 197 22 827 A1 discloses the addition of arsenic or phosphorus to a brass alloy.
  • WO 89/08725 discloses a copper-zinc alloy containing up to 0.8% by weight of nickel, between 0.5 and 3 wt .-% lead, between 0.3 and 1 wt .-% silicon and between Contains 0.07 and 0.8 wt .-% iron.
  • Arsenic is fundamentally distracting since it promotes intergranular corrosion, therefore its content is below 0.02 wt% should lie.
  • the object of the invention is to provide a copper-zinc alloy, the one particularly high resistance to dezincification and intercrystalline Has corrosion, and in particular for applications in the sanitary sector suitable. It is another object of the invention to provide a manufacturing method for to specify such a copper-zinc alloy.
  • the former object is for a copper-zinc alloy according to the invention in that it contains 50 to 80% by weight of copper, 0 to 5% by weight of lead, 0.01 to 0.1% by weight of arsenic, 0.03 to less than 0.3% by weight of silicon, 0 to 0.3 Wt .-% iron, 0 to 0.04 wt .-% manganese, with the remainder zinc and unavoidable Contains impurities, and that the effective copper equivalent 60 bis 70 wt .-% is.
  • the copper equivalent or the effective copper content taken into account the effects of different alloying elements on brass alloys concerning the structure education.
  • the copper equivalent or the effective copper content taken into account the effects of different alloying elements on brass alloys concerning the structure education.
  • the actual Copper content lower than the effective copper equivalent.
  • the task regarding the production process for a copper-zinc alloy wherein the starting materials according to the desired composition mixed, melted and poured into a metallic alloy, and wherein the metallic alloy for forming the ⁇ phase at 500-650 Is annealed ° C, is inventively achieved in that the annealed metallic Alloy is actively cooled by means of coolants.
  • Table 1 shows the composition of these 44 trial alloys in terms of copper, lead, arsenic, iron, silicon, manganese, aluminum and zinc listed.
  • the target and the actual proportion in wt .-% is reproduced.
  • the trial alloys are each designated with four-digit numbers. This designation is in following used for the respective alloy.
  • IK susceptibility compared to CuZn36Pb2As in% Maximum dezincification depth to ISO 6509 in ⁇ m 2088 19 13 2089 46 12 2090 100 15 2094 30 6 2102 8th 0 2,106 24 12 2131 91 0 2132 25 0 2133 10 0 2134 10 0 2135 65 0 2136 27 0 2156 5 212 2157 7 18 2158 7 0 2159 100 0 2160 100 0 2161 17 0 2162 13 0 2163 10 0 2164 8th 0 2165 23 0 2166 15 0 2167 18 0 2168 18 0 2169 17 0 2170 48 0 2171 100 0 2172 10 0 2173 11 0 2174 10 0 2175 88 50 2176 96 46 2177 100 75 2178 100 45 2179 83 60 2180 42 80 2181 42 95 2182 33 40 2183 58 34 2184 42 38 2185 46 54 2186 21 62 2187 33 108
  • NSF Standard 61 1994 (Drinking Water Systems Components-Health Effects; NSF International Standard 61, Section 9, March 1994) examined the lead-release to drinking water. It was as an embodiment of the invention a brass alloy with proportions by weight of 64.05% Copper, 2.7% lead, 0.1% iron, 0.3% aluminum, 0.2% silicon and 0.05% Arsenic and the rest of zinc with a CuZn36Pb2,7As0,14 alloy and with a CuZn39Pb2.7 alloy according to the prior art compared. All three alloys agree in their lead content of 2.7% by weight. The novel alloy is resistant to dezincification and intergranular corrosion.
  • the CuZn36Pb2.7As0.14 alloy is state of the art and known to be dezincification, however, has a less high resistance to an intergranular Corrosion on.
  • the CuZn39Pb2.7 alloy is known to be vulnerable for dezincification.
  • the susceptibility to intergranular corrosion in% is corresponding Column 3 of Table 2 for experimental alloys Nos. 2088, 2089, 2090, 2131 and 2132. These alloys are otherwise substantially different same composition in their arsenic content.
  • the respective arsenic content in wt .-% is plotted on the abscissa in Figure 1.
  • the illustrated Test alloys have only a negligible or no share on iron, silicon, manganese and aluminum.
  • Trial alloys Nos. 2180 and 2181 have arsenic content an uncritical value of 0.05% by weight with respect to IK. additionally However, these experimental alloys show a small proportion of iron of 0.03 Wt .-% and 0.06 wt .-%. A comparison with the iron-free experimental alloys Nos. 2088 and 2089 shows that it is evident by the addition of iron lowered the critical upper limit for the arsenic content. Within the fault tolerances increases the susceptibility to intergranular corrosion. Likewise, the rising Susceptibility to dezincification when adding iron. Will the trial alloy No. 2159, which has an iron content of 0.082% by weight, their susceptibility to intergranular corrosion becomes obvious. The Test alloy No. 2159 shows a susceptibility against Table 2 IK of 100%, while the trial alloys No. 2088 and No. 2089 a Susceptibility of only 19% and 46%, respectively.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Electroplating Methods And Accessories (AREA)
EP20020015027 2001-07-05 2002-07-05 Alliage cuivre-zinc résistant à la dezincification et son procédé de fabrication Expired - Lifetime EP1273671B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10132055 2001-07-05
DE2001132055 DE10132055C2 (de) 2001-07-05 2001-07-05 Entzinkungsbeständige Kupfer-Zink-Legierung sowie Verfahren zu ihrer Herstellung

Publications (2)

Publication Number Publication Date
EP1273671A1 true EP1273671A1 (fr) 2003-01-08
EP1273671B1 EP1273671B1 (fr) 2012-11-28

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ID=7690352

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EP20020015027 Expired - Lifetime EP1273671B1 (fr) 2001-07-05 2002-07-05 Alliage cuivre-zinc résistant à la dezincification et son procédé de fabrication

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EP (1) EP1273671B1 (fr)
DE (1) DE10132055C2 (fr)
ES (1) ES2399234T3 (fr)
PT (1) PT1273671E (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1439238A1 (fr) * 2003-01-16 2004-07-21 REHAU AG + Co Alliage de laiton résistant à la corrosion pour pièces en contact avec l'eau potable
US7776163B2 (en) 2008-12-23 2010-08-17 Xiamen Lota International Co., Ltd. Lead-free free-cutting aluminum brass alloy and its manufacturing method
CN101451204B (zh) * 2008-12-15 2010-10-13 无锡吉泉五金机械有限公司 汽车空调用导向球及其制备方法
WO2011156931A1 (fr) * 2010-06-18 2011-12-22 Comercializadora Kraviva S.P.A. Alliages de métal composés principalement de cuivre et ferrures fabriquées à partir desdits alliages
WO2014135181A1 (fr) * 2013-03-07 2014-09-12 Grohe Ag Alliage cuivre-zinc pour une robinetterie sanitaire, et procédé de fabrication de ladite robinetterie
DE102013004383A1 (de) * 2013-03-12 2014-09-18 Diehl Metall Stiftung & Co. Kg Verwendung einer Kupfer-Zink-Legierung
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
WO2015115989A3 (fr) * 2014-01-30 2015-09-24 Nordic Brass Gusum Ab Laiton présentant une meilleure résistance à la dézincification et une meilleure usinabilité
WO2019030416A1 (fr) * 2017-08-11 2019-02-14 Grohe Ag Alliage de cuivre, utilisation d'un alliage de cuivre, armature sanitaire et procédé de fabrication d'une robinetterie sanitaire

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007055446A1 (de) * 2007-11-12 2009-05-14 Hansgrohe Ag Bereitstellung von wasserführenden Bauteilen aus Messinglegierungen mit verringerter Metallionenfreisetzung
DE102013004081B4 (de) * 2013-03-11 2023-06-07 Hansa Metallwerke Ag Sanitärer Armaturenkörper

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3963526A (en) * 1972-08-22 1976-06-15 Aktieselskabet Nordiske Kabel-Og Traadfabriker Method of imparting increased dezincification resistance to brass
FR2356733A1 (fr) * 1976-06-30 1978-01-27 Toyo Valve Co Ltd Alliages de cuivre
FR2506334A1 (fr) * 1981-05-21 1982-11-26 Champagne Ardennes Affinage Alliage de laiton biphase pour fonderie, contenant de l'arsenic, et presentant des proprietes ameliorees de mise en oeuvre et une tres bonne resistance des pieces coulees, a la dezincification
WO1989008725A1 (fr) * 1988-03-16 1989-09-21 Tour & Andersson Ab Alliage de laiton et procede de fabrication et utilisation d'un tel alliage
DE19722827A1 (de) * 1997-05-30 1998-12-03 Diehl Stiftung & Co Verwendung einer Messinglegierung für Sanitärrohre
SE511680C2 (sv) * 1998-03-06 1999-11-08 Tour & Andersson Hydronics Ab Avzinkningsbeständig mässingslegering
EP1038981A1 (fr) * 1998-10-09 2000-09-27 Sambo Copper Alloy Co., Ltd Alliage de decolletage a base de cuivre
WO2001014606A1 (fr) * 1999-08-26 2001-03-01 Tour & Andersson Hydronics Ab Alliage de laiton de moulage sous pression resistant a la dezincification

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE757350A (fr) * 1969-10-10 1971-03-16 A H Andersson & Co A B Alliage de cuivre et de zinc convenant specialement pour le formage a chaud par pression

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3963526A (en) * 1972-08-22 1976-06-15 Aktieselskabet Nordiske Kabel-Og Traadfabriker Method of imparting increased dezincification resistance to brass
FR2356733A1 (fr) * 1976-06-30 1978-01-27 Toyo Valve Co Ltd Alliages de cuivre
FR2506334A1 (fr) * 1981-05-21 1982-11-26 Champagne Ardennes Affinage Alliage de laiton biphase pour fonderie, contenant de l'arsenic, et presentant des proprietes ameliorees de mise en oeuvre et une tres bonne resistance des pieces coulees, a la dezincification
WO1989008725A1 (fr) * 1988-03-16 1989-09-21 Tour & Andersson Ab Alliage de laiton et procede de fabrication et utilisation d'un tel alliage
DE19722827A1 (de) * 1997-05-30 1998-12-03 Diehl Stiftung & Co Verwendung einer Messinglegierung für Sanitärrohre
SE511680C2 (sv) * 1998-03-06 1999-11-08 Tour & Andersson Hydronics Ab Avzinkningsbeständig mässingslegering
EP1038981A1 (fr) * 1998-10-09 2000-09-27 Sambo Copper Alloy Co., Ltd Alliage de decolletage a base de cuivre
WO2001014606A1 (fr) * 1999-08-26 2001-03-01 Tour & Andersson Hydronics Ab Alliage de laiton de moulage sous pression resistant a la dezincification

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
BR. CORROS. J. (1978), 13(4), 177-85, 1978 *
DATABASE CA [online] CHEMICAL ABSTRACTS SERVICE, COLUMBUS, OHIO, US; BOWERS, J. E. ET AL: "Development of a hot-stamping brass resistant to dezincification", XP002212689, retrieved from STN Database accession no. 90:172768 CA *

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1439238A1 (fr) * 2003-01-16 2004-07-21 REHAU AG + Co Alliage de laiton résistant à la corrosion pour pièces en contact avec l'eau potable
CN101451204B (zh) * 2008-12-15 2010-10-13 无锡吉泉五金机械有限公司 汽车空调用导向球及其制备方法
US7776163B2 (en) 2008-12-23 2010-08-17 Xiamen Lota International Co., Ltd. Lead-free free-cutting aluminum brass alloy and its manufacturing method
WO2011156931A1 (fr) * 2010-06-18 2011-12-22 Comercializadora Kraviva S.P.A. Alliages de métal composés principalement de cuivre et ferrures fabriquées à partir desdits alliages
CN102892286A (zh) * 2010-06-18 2013-01-23 克拉威瓦商业有限公司 主要由铜构成的金属合金以及由该合金制造的马蹄铁
US9107398B2 (en) 2010-06-18 2015-08-18 Comercializadora Kraviva S.P.A. Metal alloys composed principally of copper and horseshoes made with said alloys
WO2014135180A1 (fr) * 2013-03-07 2014-09-12 Grohe Ag Alliage cuivre-zinc pour une robinetterie sanitaire, et procédé de fabrication de ladite robinetterie
WO2014135181A1 (fr) * 2013-03-07 2014-09-12 Grohe Ag Alliage cuivre-zinc pour une robinetterie sanitaire, et procédé de fabrication de ladite robinetterie
DE102013004383A1 (de) * 2013-03-12 2014-09-18 Diehl Metall Stiftung & Co. Kg Verwendung einer Kupfer-Zink-Legierung
DE102013004383B4 (de) * 2013-03-12 2015-06-03 Diehl Metall Stiftung & Co. Kg Verwendung einer Kupfer-Zink-Legierung
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
WO2015115989A3 (fr) * 2014-01-30 2015-09-24 Nordic Brass Gusum Ab Laiton présentant une meilleure résistance à la dézincification et une meilleure usinabilité
WO2019030416A1 (fr) * 2017-08-11 2019-02-14 Grohe Ag Alliage de cuivre, utilisation d'un alliage de cuivre, armature sanitaire et procédé de fabrication d'une robinetterie sanitaire

Also Published As

Publication number Publication date
PT1273671E (pt) 2013-02-27
EP1273671B1 (fr) 2012-11-28
ES2399234T3 (es) 2013-03-26
DE10132055A1 (de) 2003-01-23
DE10132055C2 (de) 2003-12-11

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