EP0521950A1 - Procede pour l'application de depots electrolytiques d'argent-graphite durcis par dispersion. - Google Patents

Procede pour l'application de depots electrolytiques d'argent-graphite durcis par dispersion.

Info

Publication number
EP0521950A1
EP0521950A1 EP91906474A EP91906474A EP0521950A1 EP 0521950 A1 EP0521950 A1 EP 0521950A1 EP 91906474 A EP91906474 A EP 91906474A EP 91906474 A EP91906474 A EP 91906474A EP 0521950 A1 EP0521950 A1 EP 0521950A1
Authority
EP
European Patent Office
Prior art keywords
graphite
silver
wetting agent
conductive salt
free
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
EP91906474A
Other languages
German (de)
English (en)
Other versions
EP0521950B1 (fr
Inventor
Ursula Michelsen-Mohammadein
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP0521950A1 publication Critical patent/EP0521950A1/fr
Application granted granted Critical
Publication of EP0521950B1 publication Critical patent/EP0521950B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • C25D15/00—Electrolytic or electrophoretic production of coatings containing embedded materials, e.g. particles, whiskers, wires
    • C25D15/02—Combined electrolytic and electrophoretic processes with charged materials

Definitions

  • the invention relates to a method for applying silver-graphite dispersion coatings with an alkali metal silver cyanide, conductive salt, graphite, wetting agent and an electrolyte containing a gloss additive.
  • a method of this type is known from DE 25 43 082 C3.
  • potassium cyanide is used as the free salt as the conductive salt.
  • Turkish red oil, sulfonated oleate ester and fatty alcohol sulfonate are suitable as wetting agents for the known process.
  • the known method is provided for electroplating at current densities of 1 to 3 A / dm.
  • the invention is based on the object of proposing a method for applying silver-graphite dispersion coatings which manages with an electrolyte free of free cyanide and which enables work with relatively high current densities for cutting deposition.
  • the silver-graphite dispersion coatings are applied with an electrolyte with a conductive salt free of free cyanide in a method of the type mentioned at the outset.
  • An advantage of the method according to the invention is that it is carried out with an electrolyte without free cyanide. Another advantage is that a higher current density can be achieved with rack galvanizing. An additional advantage is that insoluble anodes are used.
  • the silver Graphite dispersion coatings advantageously applied with a surge or spray plating process in a continuous system.
  • a partial coating of parts to be coated is possible.
  • the method according to the invention can be carried out with relatively high current densities, which enables a cutting separation.
  • Various salts can be used as the conductive salt without free cyanide. It is considered particularly advantageous if di-potassium hydrogen phosphate, potassium diphosphate or an alkali salt of organic acids is used as the conductive salt; These alkali salts can be potassium citrate, potassium malate or sodium acetate.
  • anionic wetting agents with a concentration of 0.5 to 30 ml / l are advantageously used as wetting agents.
  • Such wetting agents are advantageously alkali salts of alkyl sulfates or sulfonates with a straight-chain or branched alkyl chain length of C4 to C14, or an alkali salt of a highly sulfated fatty acid.
  • alkyl sulfate of an alkali salt has the following
  • a branched alkyl sulfate of an alkali salt has the following structure, for example:
  • Wetting agents also use protein fat urekondensate and protein hydrolyzate.
  • metal objects to be provided with a silver-graphite dispersion coating are coated in an electrolyte of the following composition: _.
  • metal objects are provided with a dispersion coating in an electrolyte of the following composition under the specified conditions: potassium silver cyanide ⁇ [aeg (CN) 2 J. 120 g / 1
  • Silver-graphite dispersion coatings are applied to metal objects after customary pretreatment with an electrolyte of the following composition under the following conditions:

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)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Paints Or Removers (AREA)

Abstract

Dans le cas d'un procédé connu pour l'application de dépôts d'argent-graphite, on utilise un électrolyte avec du cyanure d'argent de potassium, du sel conducteur, du graphite, un agent mouillant et un additif brillanteur. Afin de pouvoir produire avec un électrolyte exempt de cyanure libre, à des densités de courant relativement élevées, des dépôts électrolytiques d'argent-graphite durcis par dispersion, l'application de tels dépôts se fait au moyen d'un électrolyte avec un sel conducteur exempt de cyanure libre. Le présent procédé permet l'application de dépôts électrolytiques d'argent-graphite durcis par dispersion avec une teneur en graphite de 1 à 2,5 %.
EP91906474A 1990-03-28 1991-03-18 Procede pour l'application de depots electrolytiques d'argent-graphite durcis par dispersion Expired - Lifetime EP0521950B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4010346 1990-03-28
DE4010346A DE4010346A1 (de) 1990-03-28 1990-03-28 Verfahren zum aufbringen von silber-graphit-dispersionsueberzuegen
PCT/DE1991/000241 WO1991014808A1 (fr) 1990-03-28 1991-03-18 Procede pour l'application de depots electrolytiques d'argent-graphite durcis par dispersion

Publications (2)

Publication Number Publication Date
EP0521950A1 true EP0521950A1 (fr) 1993-01-13
EP0521950B1 EP0521950B1 (fr) 1995-03-08

Family

ID=6403453

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91906474A Expired - Lifetime EP0521950B1 (fr) 1990-03-28 1991-03-18 Procede pour l'application de depots electrolytiques d'argent-graphite durcis par dispersion

Country Status (7)

Country Link
US (1) US5290422A (fr)
EP (1) EP0521950B1 (fr)
JP (1) JPH05505853A (fr)
CA (1) CA2079210A1 (fr)
DE (2) DE4010346A1 (fr)
ES (1) ES2069286T3 (fr)
WO (1) WO1991014808A1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4783954B2 (ja) * 2004-06-21 2011-09-28 Ｄｏｗａメタルテック株式会社 複合めっき材およびその製造方法
JP4669967B2 (ja) * 2005-07-05 2011-04-13 Ｄｏｗａメタルテック株式会社 複合めっき材の製造方法
JP4806808B2 (ja) * 2005-07-05 2011-11-02 Ｄｏｗａメタルテック株式会社 複合めっき材およびその製造方法
JP4862192B2 (ja) * 2005-09-29 2012-01-25 Ｄｏｗａメタルテック株式会社 複合めっき材の製造方法
JP2008127641A (ja) * 2006-11-22 2008-06-05 Dowa Metaltech Kk 複合めっき材の製造方法
JP5625166B2 (ja) * 2011-01-05 2014-11-19 Ｄｏｗａメタルテック株式会社 複合めっき材およびその製造方法
CN105297095A (zh) * 2015-12-14 2016-02-03 南昌航空大学 一种纯银层/银石墨复合层的功能性镀层及制备方法
CN105386091A (zh) * 2015-12-24 2016-03-09 南昌航空大学 一种石墨分散复合添加剂
CN106757199A (zh) * 2016-12-22 2017-05-31 唐恩(厦门)电气有限公司 一种制备高压隔开开关银石墨镀层工艺方法
DE102018005348B4 (de) 2018-07-05 2025-12-04 Dr.-Ing. Max Schlötter GmbH & Co KG Kontaktoberflächen mit Dispersions-Silberschichten
DE102018005352A1 (de) 2018-07-05 2020-01-09 Dr.-Ing. Max Schlötter GmbH & Co KG Silberelektrolyt zur Abscheidung von Dispersions-Silberschichten und Kontaktoberflächen mit Dispersions-Silberschichten
CN109267124B (zh) * 2018-10-19 2019-11-19 西安西电电气研究院有限责任公司 一种银包覆石墨复合镀层及其制备方法
JP7233991B2 (ja) 2019-03-18 2023-03-07 Ｄｏｗａメタルテック株式会社 複合めっき材およびその製造方法
JP6804597B1 (ja) 2019-08-01 2020-12-23 Ｄｏｗａメタルテック株式会社 複合めっき材およびその製造方法
DE102021118820A1 (de) 2021-07-21 2023-01-26 Umicore Galvanotechnik Gmbh Silber-Elektrolyt

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2164050C3 (de) * 1971-12-23 1975-12-04 C. Uyemura & Co., Ltd., Osaka Galvanisches Bad üblicher Zusammensetzung zum gemeinsamen Abscheiden von Metall und einem dauerschmierenden Feststoffschmiermittel
US4024031A (en) * 1975-10-28 1977-05-17 Amp Incorporated Silver plating
CA1181715A (fr) * 1980-11-10 1985-01-29 Yvonne Rymwid Composition et methode d'argentage brillant a haute vitesse

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9114808A1 *

Also Published As

Publication number Publication date
WO1991014808A1 (fr) 1991-10-03
US5290422A (en) 1994-03-01
CA2079210A1 (fr) 1991-09-29
DE59104898D1 (de) 1995-04-13
EP0521950B1 (fr) 1995-03-08
ES2069286T3 (es) 1995-05-01
DE4010346A1 (de) 1991-10-02
JPH05505853A (ja) 1993-08-26

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