EP0037534A2 - Bain galvanique et son utilisation pour le dépôt de revêtements très brillants d'or blanc - Google Patents

Bain galvanique et son utilisation pour le dépôt de revêtements très brillants d'or blanc Download PDF

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Publication number
EP0037534A2
EP0037534A2 EP81102315A EP81102315A EP0037534A2 EP 0037534 A2 EP0037534 A2 EP 0037534A2 EP 81102315 A EP81102315 A EP 81102315A EP 81102315 A EP81102315 A EP 81102315A EP 0037534 A2 EP0037534 A2 EP 0037534A2
Authority
EP
European Patent Office
Prior art keywords
gold
sulfite
coatings
white gold
cadmium
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
EP81102315A
Other languages
German (de)
English (en)
Other versions
EP0037534A3 (en
EP0037534B1 (fr
Inventor
Eberhard Ing.Grad. Bitzer
Wilhelm Aichinger
Gerhard Ing.Grad. Steinhilber
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
Publication of EP0037534A2 publication Critical patent/EP0037534A2/fr
Publication of EP0037534A3 publication Critical patent/EP0037534A3/de
Application granted granted Critical
Publication of EP0037534B1 publication Critical patent/EP0037534B1/fr
Expired legal-status Critical Current

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
    • C25D3/56—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 galvanic bath for the deposition of high-gloss white gold coatings with 2 - 10 g / 1 gold in the form of a sulfite complex, 2 - 40 g / 1 alkali sulfite, 2 - 40 g / 1 of a complexing agent, 1 - 10 g / 1 nickel and 1 - 20 g / 1 cadmium each in the form of water-soluble salts.
  • white gold electroplating is often required. It's white Gold baths known that contain the gold as a sulfite complex and also alkali sulfite and ethylenediaminetetraacetic acid. Copper, nickel and / or cadmium are usually used as alloy metals. B. phosphonic acid (DE-OS 23 34 813). These baths can be used to deposit thick, ductile white gold coatings with a gold content of around 75%.
  • the bath contains 0.5-10 g / 1 orotic acid and / or its derivatives and / or salts.
  • Uracil-4-carboxylic acid is referred to as orotic acid.
  • the baths according to the invention are preferably operated at a pH between 9 and 11, a temperature between 50 and 70 ° C. and a current density between 0.5 and 2 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)
EP81102315A 1980-04-03 1981-03-27 Bain galvanique et son utilisation pour le dépôt de revêtements très brillants d'or blanc Expired EP0037534B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3013030 1980-04-03
DE3013030A DE3013030C2 (de) 1980-04-03 1980-04-03 Galvanisches Bad und Verfahren zur Abscheidung hochglänzender Weißgoldüberzüge

Publications (3)

Publication Number Publication Date
EP0037534A2 true EP0037534A2 (fr) 1981-10-14
EP0037534A3 EP0037534A3 (en) 1981-11-04
EP0037534B1 EP0037534B1 (fr) 1983-09-07

Family

ID=6099233

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81102315A Expired EP0037534B1 (fr) 1980-04-03 1981-03-27 Bain galvanique et son utilisation pour le dépôt de revêtements très brillants d'or blanc

Country Status (3)

Country Link
US (1) US4374006A (fr)
EP (1) EP0037534B1 (fr)
DE (1) DE3013030C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2306508A (en) * 1995-11-03 1997-05-07 Enthone Omi Gold-iron alloy electroplating processes compositions and deposits

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE220736T1 (de) 1995-11-03 2002-08-15 Enthone Omi Inc Elektroplattierungsverfahren, zusammensetzungen und überzügen
CN1360643A (zh) * 1999-07-14 2002-07-24 大阪市 眼镜框的表面处理方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1232597A (fr) * 1959-01-13 1960-10-10 Deinert & Co Bain galvanique pour le dépôt de nickel ou d'autres métaux
CH455434A (de) * 1963-08-15 1968-07-15 Werner Fluehmann Galvanische A Verfahren zur Herstellung von Weissgoldüberzügen

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3475292A (en) * 1966-02-10 1969-10-28 Technic Gold plating bath and process
ZA734253B (en) * 1972-07-10 1975-02-26 Degussa Electrolytic bath
US3981782A (en) * 1972-07-28 1976-09-21 Johnson Matthey & Co., Limited Electroplating of gold and gold compounds therefor
US4012294A (en) * 1972-08-10 1977-03-15 Oxy Metal Industries Corporation Gold sulfite baths containing organophosphorous compounds

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1232597A (fr) * 1959-01-13 1960-10-10 Deinert & Co Bain galvanique pour le dépôt de nickel ou d'autres métaux
CH455434A (de) * 1963-08-15 1968-07-15 Werner Fluehmann Galvanische A Verfahren zur Herstellung von Weissgoldüberzügen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2306508A (en) * 1995-11-03 1997-05-07 Enthone Omi Gold-iron alloy electroplating processes compositions and deposits
GB2306508B (en) * 1995-11-03 1999-04-28 Enthone Omi Electroplating processes compositions and deposits

Also Published As

Publication number Publication date
DE3013030C2 (de) 1984-02-09
US4374006A (en) 1983-02-15
EP0037534A3 (en) 1981-11-04
EP0037534B1 (fr) 1983-09-07
DE3013030A1 (de) 1981-10-15

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