EP0119424B1 - Verfahren zum Abscheiden von niederkarätigen, glänzenden Gold-Silber-Legierungsüberzügen - Google Patents

Verfahren zum Abscheiden von niederkarätigen, glänzenden Gold-Silber-Legierungsüberzügen Download PDF

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Publication number
EP0119424B1
EP0119424B1 EP84101158A EP84101158A EP0119424B1 EP 0119424 B1 EP0119424 B1 EP 0119424B1 EP 84101158 A EP84101158 A EP 84101158A EP 84101158 A EP84101158 A EP 84101158A EP 0119424 B1 EP0119424 B1 EP 0119424B1
Authority
EP
European Patent Office
Prior art keywords
gold
silver
tellurium
carat
cyanide
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.)
Expired
Application number
EP84101158A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0119424A1 (de
Inventor
Bernd Dr. Dipl.-Chem. Dorbath
Rainer Dr. Dipl.-Chem. Schlodder
Norbert Giesecke
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.)
Evonik Operations GmbH
Original Assignee
Degussa GmbH
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 Degussa GmbH filed Critical Degussa GmbH
Priority to AT84101158T priority Critical patent/ATE27007T1/de
Publication of EP0119424A1 publication Critical patent/EP0119424A1/de
Application granted granted Critical
Publication of EP0119424B1 publication Critical patent/EP0119424B1/de
Expired legal-status Critical Current

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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
    • C25D3/56—Electroplating: Baths therefor from solutions of alloys
    • C25D3/62—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of gold

Definitions

  • the invention relates to a method for the deposition of low-carat, shiny alloys which are stable in a wide range of working areas.
  • organic substances and / or foreign metals, which are not separated, to the electrolyte shiny coatings can be deposited.
  • organic brighteners are e.g. B. triphenylmethane dyes (DD-PS98 698), condensation products of polyalkyleneimines and alkylene polyamines (DE-PS 2713 507).
  • DD-PS98 698 triphenylmethane dyes
  • DE-PS 2713 507 condensation products of polyalkyleneimines and alkylene polyamines
  • CH-PS 629 260 a water-soluble indium compound is described together with an organic aliphatic amine as a gloss additive, in US Pat. No.
  • the gold content in the coating largely depends on the Au / Ag ratio in the bath and on the selected operating parameters for the deposition rate, in particular on the current density and the bath temperature. These are dependencies. disadvantageous for a practical bath operation for the deposition of low-carat gold-silver alloys with a constant carat content.
  • an electrolytic bath consisting of an aqueous solution of 0.5 to 25 g / l gold in the form of alkali gold cyanide, 0.25 to 15 g / l silver in the form of alkali silver cyanide and 10 to 200 g / 1 alkali cyanide and an additional 0.000 5 to 5 g / l tellurium in the form of a water-soluble tellurium compound and possibly a wetting agent.
  • the electrolyte preferably contains 0.001 to 1 g / l tellurium in the form of a water-soluble tellurium compound, it being possible for the tellurium to be in the oxidation stage 11, IV or VI.
  • tellurium-containing bath additives are tellurium dioxide (Te0 2 ), tellurium trioxide (Te0 3 ), telluric acid and its derivatives, such as tellurite and higher-condensed molecular complexes, telluric acid and its derivatives, tellurium-halogen compounds and tellurides.
  • tellurites and / or tellurates in the bathroom has proven to be the best.
  • This effect is particularly advantageous for the practical use of the bathroom.
  • these baths allow low-carat, shiny gold-silver alloy layers with layer thicknesses over 100 microns to be produced in a single deposition process without intermediate treatment.
  • the approx. 100 ⁇ m thick, low-carat gold-silver alloy layers also show an excellent shine and a strikingly constant alloy composition over the entire layer thickness.
  • Such gold-silver alloy baths are therefore also suitable for the galvanoplastic production of 12-14-carat gold-silver moldings.
  • a known electrolyte which contains gold, silver and free potassium cyanide dissolved in an aqueous solution, and a tellurium-containing compound is added to it, which is either soluble in water or reacts with water to form a soluble compound.
  • the bath is preferably prepared with potassium salts, but sodium salts or ammonium salts can also be used, or other reaction products of AuCN and AgCN with alkali cyanides. Baths containing 5 to 10 g / l gold in the form of potassium gold cyanide, 1 to 6 g / l silver in the form of potassium silver cyanide and 50 to 150 g / l potassium cyanide have proven successful.
  • wetting agents such as B. partially esterified forms of phosphoric acid
  • the quality of the coatings can be improved.
  • Such wetting agents are preferably used in the concentration range of 0.5-5 ml / l.
  • the bath is maintained at an alkaline pH, preferably between 10.5 and 12.5. Suitable bath temperatures are between 25 ° C and 70 ° C. The higher the bath temperature, the higher the current density required for the deposition of qualitatively perfect low-carat Au / Ag alloys.
  • a gold-silver alloy of 12 carat 1 carat is obtained at a bath temperature of 40 ° C in a current density range of 0.6 to 1.2 A / dm 2 .
  • the same alloy composition is obtained in a current density range of 2.2 to 3.0 A / dm 2 .

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)
  • Physical Vapour Deposition (AREA)
  • Electrolytic Production Of Metals (AREA)
EP84101158A 1983-03-16 1984-02-04 Verfahren zum Abscheiden von niederkarätigen, glänzenden Gold-Silber-Legierungsüberzügen Expired EP0119424B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84101158T ATE27007T1 (de) 1983-03-16 1984-02-04 Verfahren zum abscheiden von niederkaraetigen, glaenzenden gold-silber-legierungsueberzuegen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833309397 DE3309397A1 (de) 1983-03-16 1983-03-16 Elektrolytisches bad zum abscheiden von niederkaraetigen, glaenzenden gold-silber-legierungsueberzuegen
DE3309397 1983-03-16

Publications (2)

Publication Number Publication Date
EP0119424A1 EP0119424A1 (de) 1984-09-26
EP0119424B1 true EP0119424B1 (de) 1987-05-06

Family

ID=6193635

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84101158A Expired EP0119424B1 (de) 1983-03-16 1984-02-04 Verfahren zum Abscheiden von niederkarätigen, glänzenden Gold-Silber-Legierungsüberzügen

Country Status (7)

Country Link
US (1) US4487664A (enrdf_load_stackoverflow)
EP (1) EP0119424B1 (enrdf_load_stackoverflow)
JP (1) JPS59179794A (enrdf_load_stackoverflow)
AT (1) ATE27007T1 (enrdf_load_stackoverflow)
BR (1) BR8401131A (enrdf_load_stackoverflow)
DE (2) DE3309397A1 (enrdf_load_stackoverflow)
HK (1) HK102891A (enrdf_load_stackoverflow)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3505473C1 (de) * 1985-02-16 1986-06-05 Degussa Ag, 6000 Frankfurt Bad zur galvanischen Abscheidung von Gold-Indium-Legierungsueberzuegen
JP2007537358A (ja) * 2004-05-11 2007-12-20 テクニック・インコーポレイテッド 金−スズ共晶合金のための電気めっき用溶液
US20090104463A1 (en) 2006-06-02 2009-04-23 Rohm And Haas Electronic Materials Llc Gold alloy electrolytes
SG127854A1 (en) 2005-06-02 2006-12-29 Rohm & Haas Elect Mat Improved gold electrolytes
US9290311B2 (en) 2012-03-22 2016-03-22 Saint-Gobain Ceramics & Plastics, Inc. Sealed containment tube
JP6105039B2 (ja) 2012-03-22 2017-03-29 サン−ゴバン セラミックス アンド プラスティクス，インコーポレイティド 焼結結合されたセラミック物品
CN104540796B (zh) 2012-03-22 2017-02-22 圣戈本陶瓷及塑料股份有限公司 加长管结构
ITFI20120103A1 (it) 2012-06-01 2013-12-02 Bluclad Srl Bagni galvanici per l'ottenimento di una lega di oro a bassa caratura e processo galvanico che utilizza detti bagni.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1213196B (de) * 1961-05-01 1966-03-24 Sel Rex Corpooration Bad zum galvanischen Abscheiden glaenzender 14 bis 23, 5 karaetiger Gold-Silberueberzuege
US3864222A (en) * 1973-03-26 1975-02-04 Technic Baths for Electrodeposition of Gold and Gold Alloys and Method Therefore
US4121982A (en) * 1978-02-03 1978-10-24 American Chemical & Refining Company Incorporated Gold alloy plating bath and method

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE750185C (de) * 1939-07-08 1944-12-27 Baeder zur elektrolytischen Abscheidung von glaenzenden Metallniederschlaegen
US3475292A (en) * 1966-02-10 1969-10-28 Technic Gold plating bath and process
JPS4410363Y1 (enrdf_load_stackoverflow) * 1966-12-08 1969-04-25
GB1283024A (en) * 1970-01-22 1972-07-26 B J S Electro Plating Company Electro-depositing silver alloys
CH629260A5 (en) * 1978-02-22 1982-04-15 Systemes Traitements Surfaces Process for gold-silver electrolytic deposition, bath for its use and alloy thus obtained

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1213196B (de) * 1961-05-01 1966-03-24 Sel Rex Corpooration Bad zum galvanischen Abscheiden glaenzender 14 bis 23, 5 karaetiger Gold-Silberueberzuege
US3864222A (en) * 1973-03-26 1975-02-04 Technic Baths for Electrodeposition of Gold and Gold Alloys and Method Therefore
US4121982A (en) * 1978-02-03 1978-10-24 American Chemical & Refining Company Incorporated Gold alloy plating bath and method

Also Published As

Publication number Publication date
HK102891A (en) 1991-12-27
BR8401131A (pt) 1984-10-23
ATE27007T1 (de) 1987-05-15
JPS59179794A (ja) 1984-10-12
DE3309397A1 (de) 1984-09-20
JPH0571673B2 (enrdf_load_stackoverflow) 1993-10-07
EP0119424A1 (de) 1984-09-26
US4487664A (en) 1984-12-11
DE3463528D1 (en) 1987-06-11

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