EP2089561A2 - Cyanidfreie elektrolytzusammensetzung und verfahren zur abscheidung von silber- oder silberlegierungsschichten auf substraten - Google Patents
Cyanidfreie elektrolytzusammensetzung und verfahren zur abscheidung von silber- oder silberlegierungsschichten auf substratenInfo
- Publication number
- EP2089561A2 EP2089561A2 EP07818853A EP07818853A EP2089561A2 EP 2089561 A2 EP2089561 A2 EP 2089561A2 EP 07818853 A EP07818853 A EP 07818853A EP 07818853 A EP07818853 A EP 07818853A EP 2089561 A2 EP2089561 A2 EP 2089561A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- silver
- electrolyte composition
- composition according
- sulfonic acid
- electrolyte
- 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
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
- C25D3/46—Electroplating: Baths therefor from solutions of silver
Definitions
- the present invention relates to a cyanide-free electrolyte composition for depositing a silver or silver alloy layer on a substrate. Moreover, the present invention relates to a method for depositing such layers using the cyanide-free electrolyte composition of the present invention.
- Galvanic electrolyte compositions for the deposition of silver or silver alloy layers are known both for use in the field of decorative surfaces and in the technical field. It is customary in the prior art to use soluble silver compounds, usually in the form of cyanide compounds such as potassium silver cyanide or in the form of sulfur-containing complexes such as sulfite, thiosulfate or thiocyanate and ammonium complexes.
- soluble silver compounds usually in the form of cyanide compounds such as potassium silver cyanide or in the form of sulfur-containing complexes such as sulfite, thiosulfate or thiocyanate and ammonium complexes.
- electrolyte compositions are generally unstable without the addition of other complexing or stabilizing agents, it is customary to use the complexing agent components in excess, so that such electrolyte compositions often have very high cyanide, sulfur-containing complexing agent or ammonium concentrations.
- the electrolyte compositions produced in this way are characterized by a wide range of applications. Cyanidic compositions are stable but toxic and therefore of environmental concern. The others mentioned have a lower risk potential, but tend to instability. Despite the significantly lower risk potential with respect to cyanides, the environmental relevance contained in such electrolyte compositions is not negligible and, because of their allergenic potential, can pose a threat to persons working with these electrolyte compositions.
- DE 199 28 47 A1 discloses a low-pollutant to unpolluted aqueous electrolyte composition for the electrodeposition of noble metals and noble metal alloys comprising the noble metal to be deposited and the alloy metals to be used in the form of water-soluble compounds of protein amino acids or their salts or in the form of sulfonic acid compounds.
- these have water-soluble nitro compounds. These may be, for example, 3-nitrophthalic acid, 4-nitrophthalic acid or m-nitrobenzenesulfonic acid.
- these may include organic acids such as nicotinic acid or succinic acid.
- No. 4,126,524 A1 discloses cyanide-free electrolyte compositions for depositing silver or silver alloys which have silver in the form of imides of organic dicarboxylic acids.
- the reaction products of water-soluble silver salts with pyrrolidinediones may serve as silver sources in corresponding electrolyte compositions.
- silver can be used in the form of succinimides or maleimides.
- U.S. Patent No. 4,246,077 discloses the use of silver in the form of pyrrolidinediones as a silver source in corresponding electrolyte compositions for depositing silver or silver alloy layers.
- U.S. Patent No. 5,601,696 discloses the use of hydantoin as a complexing agent in electrolyte compositions for depositing silver or silver alloy layers on substrates.
- hydantoin for example, 1-methylhydantoin, 1, 3-dimethylhydantoin, 5,5-dimethylhydantoin, 1-methanol-5,5-dimethylhydantoin or also 5,5-diphenylhydantoin can be used as complexing reagents.
- WO 2005/083156 discloses a hydantoin-containing electrolyte composition for depositing mirror-finished silver or silver alloy layers.
- these electrolyte compositions have other environmentally harmful compounds such as 2,2'-bipyridine.
- 2,2'-bipyridine can lead to an inhibition of carboxypeptidases, which play a crucial role, for example, in the digestion of proteins in the small intestine, which justifies the toxicity of this class of compounds and requires extremely careful handling of these compounds.
- a cyanide-free electrolyte composition for depositing a silver or silver alloy layer on a substrate comprising at least a silver ion source, a sulfonic acid and / or a derivative of a sulfonic acid, a wetting agent and a hydantoin of the general formula
- Ri and R 2 independently of one another may be an H, an alkyl group having 1 to 5 carbon atoms or a substituted or unsubstituted aryl group.
- the electrolyte composition according to the invention comprises the sulfonic acid and / or a derivative of a sulfonic acid in a concentration between 50 g / l and 500 g / l, preferably between 100 g / l and 300 g / l, more preferably between 130 g / l and 200 g / l ,
- the electrolyte composition according to the invention preferably comprises potassium methanesulfonate.
- methanesulfonates such as, for example, sodium methanesulfonate, but also sulfates and other compounds suitable as electrolyte salt are suitable for use in the electrolyte composition according to the invention.
- the electrolyte composition of the present invention may have a silver concentration of from 10 to 50 g / L, preferably from 20 to 40 g / L, more preferably from 25 to 35 g / L.
- the electrolyte composition of the present invention has at least one silver salt of a sulfonic acid.
- other silver ion sources may include inorganic silver salts selected from the group consisting of silver oxide, silver nitrate and silver sulfate in the electrolyte composition.
- the electrolyte composition of the present invention may have corresponding sources of alloy metal ions.
- corresponding alloying metals are used in the form of their sulfonic acid salts, oxides, nitrates or sulfates.
- the electrolyte composition according to the invention may for example comprise a naphthalenesulfonic acid-formaldehyde polycondensate and / or a sulfopropylated polyalkoxylated naphthol.
- the electrolyte composition may comprise other wetting agents or surfactants.
- an alkali bromide for improving the deposition result may be added to the electrolyte composition of the present invention.
- the addition of potassium bromide has proven particularly suitable.
- the addition of alkali bromides, in particular potassium bromide leads to a uniform deposition of the silver layer on the substrate surface.
- the addition of potassium bromide leads to a uniform matting effect of the deposited layer.
- more uniform deposition results by the addition of alkali bromides such. B. reached potassium bromide.
- the addition of 50 to 500 mg / 1 alkali bromide, preferably 100 to 200 mg / l Alkalibromid be provided in order to achieve the above-described improved deposition results.
- the layers deposited in this way are virtually free of internal stresses and show very good soldering properties.
- the electrolyte composition according to the invention has a thiosulfate.
- the Electrolyte composition an alkali metal thiosulfate, particularly preferably sodium thiosulfate.
- the thiosulfate is contained in a concentration between 50 mg / l and 500 mg / l, preferably 100 mg / l to 200 mg / l in the electrolyte composition.
- the thiosulfate does not serve as a complexing agent for the silver to be deposited, but as a matting agent.
- the silver layers deposited from such an electrolyte composition are uniformly matt and almost free from internal stress. In addition, the layers show very good soldering properties.
- this has both an alkali bromide and a thiosulfate.
- the total concentration of alkali bromide and thiosulfate in the electrolyte composition is 50 mg / l to 500 mg / l, preferably 100 mg / l to 200 mg / l.
- the layers deposited from such an electrolyte composition are uniformly matt, virtually stress-free and show very good soldering properties.
- the pH of the electrolyte composition of the invention is between pH 8 and pH 14, preferably between pH 9.0 and pH 12.5, more preferably between pH 9.5 and pH 12.0.
- the object is achieved by a method for depositing a silver or silver alloy layer on a substrate, wherein the substrate to be coated at a set current density between 0.1 and 2 A / dm 2 , preferably 0.3 to 1, 5 A / dm 2 is contacted with the electrolyte composition according to the invention.
- the cyanide-free electrolyte compositions according to the invention exhibit a hitherto unknown stability for a cyanide-free silver deposition electrolyte which is comparable to the stability of cyanidic baths.
- the electrolyte compositions of the invention show a bath stability of> 100 Ah / l.
- the electrolyte compositions according to the invention can thus be used in corresponding silver deposition baths with a service life of over one year, which is too large in terms of cost and environmental impact Advantages over the previously known from the prior art cyanide electrolyte compositions leads.
- the deposition of lustrous, ductile silver or silver alloy layers in a wide range of applications is possible.
- layers for applications in the jewelery, electronics or automotive industry can be deposited with the aid of the electrolyte composition according to the invention.
- inventive method and the electrolyte composition of the invention are particularly applicable to suitable substrates such as gold-plated, nickel-plated and other, not prone to sedimentation sheets.
- a gilded brass sheet was contacted at an adjusted current density of 0.5 A / dm 2 for 15 minutes with an electrolyte composition having the following composition:
- a gilded brass sheet was contacted at an adjusted current density of 0.5 A / dm 2 for 15 minutes with an electrolyte composition having the following composition:
- a gilded brass sheet was contacted at an adjusted current density of 0.5 A / dm 2 for 15 minutes with an electrolyte composition having the following composition:
- a gilded brass sheet was contacted at an adjusted current density of 0.5 A / dm 2 for 15 minutes with an electrolyte composition having the following composition:
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electroplating And Plating Baths Therefor (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP07818853.9A EP2089561B1 (de) | 2006-10-09 | 2007-10-09 | Cyanidfreie elektrolytzusammensetzung und verfahren zur abscheidung von silber- oder silberlegierungsschichten auf substraten |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP06021174A EP1918426A1 (de) | 2006-10-09 | 2006-10-09 | Cyanidfreie Elektrolytzusammensetzung und Verfahren zur Abscheidung von Silber- oder Silberlegierungsschichten auf Substraten |
| EP07818853.9A EP2089561B1 (de) | 2006-10-09 | 2007-10-09 | Cyanidfreie elektrolytzusammensetzung und verfahren zur abscheidung von silber- oder silberlegierungsschichten auf substraten |
| PCT/EP2007/008780 WO2008043528A2 (de) | 2006-10-09 | 2007-10-09 | Cyanidfreie elektrolytzusammensetzung und verfahren zur abscheidung von silber- oder silberlegierungsschichten auf substraten |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2089561A2 true EP2089561A2 (de) | 2009-08-19 |
| EP2089561B1 EP2089561B1 (de) | 2016-03-09 |
Family
ID=37806683
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP06021174A Withdrawn EP1918426A1 (de) | 2006-10-09 | 2006-10-09 | Cyanidfreie Elektrolytzusammensetzung und Verfahren zur Abscheidung von Silber- oder Silberlegierungsschichten auf Substraten |
| EP07818853.9A Active EP2089561B1 (de) | 2006-10-09 | 2007-10-09 | Cyanidfreie elektrolytzusammensetzung und verfahren zur abscheidung von silber- oder silberlegierungsschichten auf substraten |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP06021174A Withdrawn EP1918426A1 (de) | 2006-10-09 | 2006-10-09 | Cyanidfreie Elektrolytzusammensetzung und Verfahren zur Abscheidung von Silber- oder Silberlegierungsschichten auf Substraten |
Country Status (6)
| Country | Link |
|---|---|
| US (2) | US9212427B2 (de) |
| EP (2) | EP1918426A1 (de) |
| JP (1) | JP5439181B2 (de) |
| KR (1) | KR101409701B1 (de) |
| CN (1) | CN101627150B (de) |
| WO (1) | WO2008043528A2 (de) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1918426A1 (de) * | 2006-10-09 | 2008-05-07 | Enthone, Inc. | Cyanidfreie Elektrolytzusammensetzung und Verfahren zur Abscheidung von Silber- oder Silberlegierungsschichten auf Substraten |
| DE102009029558A1 (de) | 2009-09-17 | 2011-03-31 | Schott Solar Ag | Elektrolytzusammensetzung |
| RU2536127C2 (ru) * | 2010-03-09 | 2014-12-20 | Общество с ограниченной ответственностью "Санкт-Петербургский Центр "ЭЛМА (Электроникс Менеджмент)" | Кислый электролит для серебрения |
| SG179381A1 (en) | 2010-09-21 | 2012-04-27 | Rohm & Haas Elect Mat | Method of electroplating silver strike over nickel |
| KR20150131346A (ko) * | 2013-03-15 | 2015-11-24 | 엔쏜 인코포레이티드 | 플루오로중합체 나노입자로 은의 전착 |
| DE102015008686A1 (de) | 2015-07-02 | 2017-01-05 | ORU e.V. | Cyanidfreie, wässrige elektrolytische Zusammensetzung |
| CN105420770A (zh) * | 2015-11-30 | 2016-03-23 | 苏州市金星工艺镀饰有限公司 | 一种防变色无氰镀银电镀液及其电镀方法 |
| CN105350037A (zh) * | 2015-12-17 | 2016-02-24 | 宏正(福建)化学品有限公司 | 一种碱性无氰镀锌镍合金镀液及其电镀工艺 |
| CN112469847A (zh) * | 2018-08-21 | 2021-03-09 | 优美科电镀技术有限公司 | 用于银的无氰化物沉积的电解质 |
| DE102019106004B4 (de) * | 2019-03-08 | 2023-11-30 | Umicore Galvanotechnik Gmbh | Additiv für die cyanidfreie Abscheidung von Silber |
| US11578418B2 (en) * | 2021-03-29 | 2023-02-14 | Rohm And Haas Electronic Materials Llc (Rhem) | Silver electroplating compositions and methods for electroplating silver with low coefficients of friction |
| FR3155008B1 (fr) | 2023-11-06 | 2025-11-07 | Axon Cable Sa | Composition de bain d’argenture sans cyanure et ses utilisations |
| CN121472943A (zh) * | 2024-08-06 | 2026-02-06 | 华为技术有限公司 | 电镀金银合金的电镀液及其应用 |
Family Cites Families (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4126524A (en) | 1975-03-12 | 1978-11-21 | Technic, Inc. | Silver complex, method of making said complex and method and electrolyte containing said complex for electroplating silver and silver alloys |
| US4246077A (en) | 1975-03-12 | 1981-01-20 | Technic, Inc. | Non-cyanide bright silver electroplating bath therefor, silver compounds and method of making silver compounds |
| US4161432A (en) * | 1975-12-03 | 1979-07-17 | International Business Machines Corporation | Electroplating chromium and its alloys |
| JPS5293638A (en) * | 1976-02-04 | 1977-08-06 | Hitachi Ltd | Silver plating solution |
| SU724606A1 (ru) * | 1978-03-20 | 1980-03-30 | Институт общей и неорганической химии АН Украинской ССР | Электролит серебрени |
| US4461680A (en) * | 1983-12-30 | 1984-07-24 | The United States Of America As Represented By The Secretary Of Commerce | Process and bath for electroplating nickel-chromium alloys |
| JPH0361393A (ja) * | 1989-07-28 | 1991-03-18 | Daiichi Koushiyou Kk | 銀めっき法 |
| JP3224454B2 (ja) * | 1993-05-20 | 2001-10-29 | 日本エレクトロプレイテイング・エンジニヤース株式会社 | ノンシアン銀めっき浴及びその銀めっき方法 |
| JPH08104993A (ja) | 1994-10-04 | 1996-04-23 | Electroplating Eng Of Japan Co | 銀めっき浴及びその銀めっき方法 |
| JP3481020B2 (ja) * | 1995-09-07 | 2003-12-22 | ディップソール株式会社 | Sn−Bi系合金めっき浴 |
| US6251249B1 (en) * | 1996-09-20 | 2001-06-26 | Atofina Chemicals, Inc. | Precious metal deposition composition and process |
| JPH10121289A (ja) | 1996-10-18 | 1998-05-12 | Electroplating Eng Of Japan Co | 非シアン系銀めっき浴 |
| JP3782869B2 (ja) * | 1997-07-01 | 2006-06-07 | 株式会社大和化成研究所 | 錫−銀合金めっき浴 |
| CN1163633C (zh) | 1997-10-02 | 2004-08-25 | 戈尔德施米特股份公司 | 制备银化合物的方法 |
| US6210556B1 (en) * | 1998-02-12 | 2001-04-03 | Learonal, Inc. | Electrolyte and tin-silver electroplating process |
| JPH11302893A (ja) * | 1998-04-22 | 1999-11-02 | Okuno Chem Ind Co Ltd | 非シアン系電気銀めっき液 |
| US7628903B1 (en) * | 2000-05-02 | 2009-12-08 | Ishihara Chemical Co., Ltd. | Silver and silver alloy plating bath |
| DE10026680C1 (de) | 2000-05-30 | 2002-02-21 | Schloetter Fa Dr Ing Max | Elektrolyt und Verfahren zur Abscheidung von Zinn-Silber-Legierungsschichten und Verwendung des Elektrolyten |
| DE10124631C1 (de) * | 2001-05-18 | 2002-11-21 | Atotech Deutschland Gmbh | Verfahren zum direkten elektrolytischen Metallisieren von elektrisch nichtleiteitenden Substratoberflächen |
| US20030159938A1 (en) * | 2002-02-15 | 2003-08-28 | George Hradil | Electroplating solution containing organic acid complexing agent |
| WO2004079055A1 (ja) * | 2003-03-05 | 2004-09-16 | Tdk Corporation | 希土類磁石の製造方法およびめっき浴 |
| US20050183961A1 (en) * | 2004-02-24 | 2005-08-25 | Morrissey Ronald J. | Non-cyanide silver plating bath composition |
| CN100355944C (zh) * | 2005-01-17 | 2007-12-19 | 上海大学 | 用于无氰镀银的光亮剂及其制备方法 |
| EP1918426A1 (de) * | 2006-10-09 | 2008-05-07 | Enthone, Inc. | Cyanidfreie Elektrolytzusammensetzung und Verfahren zur Abscheidung von Silber- oder Silberlegierungsschichten auf Substraten |
-
2006
- 2006-10-09 EP EP06021174A patent/EP1918426A1/de not_active Withdrawn
-
2007
- 2007-10-09 JP JP2009531764A patent/JP5439181B2/ja active Active
- 2007-10-09 EP EP07818853.9A patent/EP2089561B1/de active Active
- 2007-10-09 CN CN2007800454144A patent/CN101627150B/zh active Active
- 2007-10-09 US US12/445,049 patent/US9212427B2/en active Active
- 2007-10-09 KR KR1020097009568A patent/KR101409701B1/ko active Active
- 2007-10-09 WO PCT/EP2007/008780 patent/WO2008043528A2/de not_active Ceased
-
2015
- 2015-12-08 US US14/962,863 patent/US9657402B2/en active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2008043528A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101627150A (zh) | 2010-01-13 |
| KR101409701B1 (ko) | 2014-06-19 |
| KR20090073220A (ko) | 2009-07-02 |
| US9657402B2 (en) | 2017-05-23 |
| EP1918426A1 (de) | 2008-05-07 |
| EP2089561B1 (de) | 2016-03-09 |
| CN101627150B (zh) | 2011-06-22 |
| JP5439181B2 (ja) | 2014-03-12 |
| WO2008043528A3 (de) | 2009-04-16 |
| US9212427B2 (en) | 2015-12-15 |
| US20100044239A1 (en) | 2010-02-25 |
| JP2010506048A (ja) | 2010-02-25 |
| WO2008043528A2 (de) | 2008-04-17 |
| US20160122890A1 (en) | 2016-05-05 |
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