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DE921184C - Process for the galvanic production of silver coatings from cyankcal electrolytes - Google Patents

Process for the galvanic production of silver coatings from cyankcal electrolytes

Info

Publication number
DE921184C
DE921184C DEK15234A DEK0015234A DE921184C DE 921184 C DE921184 C DE 921184C DE K15234 A DEK15234 A DE K15234A DE K0015234 A DEK0015234 A DE K0015234A DE 921184 C DE921184 C DE 921184C
Authority
DE
Germany
Prior art keywords
electrolytes
silver coatings
cyankcal
galvanic production
silver
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
DEK15234A
Other languages
German (de)
Inventor
Karl Kuell
Adolf Schwedhelm
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.)
Kampschulte & Cie Dr W
Original Assignee
Kampschulte & Cie Dr W
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 Kampschulte & Cie Dr W filed Critical Kampschulte & Cie Dr W
Priority to DEK15234A priority Critical patent/DE921184C/en
Application granted granted Critical
Publication of DE921184C publication Critical patent/DE921184C/en
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
    • C25D3/46—Electroplating: Baths therefor from solutions of silver

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)

Description

Verfahren zum galvanischen Erzeugen von Silberüberzügen aus cyankalischen Elektrolyten Es sind verschiedene Verfahren bekannt, die die elektrolytische Abscheidung von glatten und harten Silberniederschlägen in cyanidisch-alkalischen Elektrolyten ermöglichen. Danach kommen Verfahren zurAnwendung, bei denen vorzugsweiseOxysäuren oder Aminosäuren oder Salze dieser Säuren in Verbindung mit Metallen aus den Nebenreihen der q.. und 5. Gruppe des Periodischen Systems in Anwendung gelangen.Process for the galvanic production of silver coatings from cyankalic Electrolytes Various processes are known that use electrolytic deposition of smooth and hard silver deposits in cyanide-alkaline electrolytes enable. Thereafter, methods are used in which preferably oxyacids are used or amino acids or salts of these acids in connection with metals from the secondary series of the q .. and 5th group of the periodic table in application.

Gemäß der Erfindung wird nun vorgeschlagen, zum galvanischen Erzeugen von Silberüberzügen solche Elektrolyte zu verwenden, denen ungesättigte Alkohole zugesetzt sind. Man erreicht hierdurch eine beträchtliche Erhöhung der Stromdichte. Die so erzeugten Niederschläge weisen eine glatte und blanke Oberfläche sowie eine merkliche Zunahme des Härtegrades auf. Diese Vorzüge bleiben auch erhalten, wenn dem Elektrolyt zur Glanzerhöhung Schwefelkohlenstoff und/oder sulfonierte ungesättigte Oxysäuren zugegeben werden. Beispiel Silber als Kaliumsilbercyanid ...... 30,09/1 Freies Kaliumcyanid . . . . . . . . . . . . . . 5o,o g/1 Kaliumcarbonat . . . . . . . . . . . . . . . . . : 4o,o g/1 Ätzkali . . . . . . . . . . . . . . . . . . . . . . . . 3,0g/1 r, q. Butindiol ....... . . . . . . . . . . . . . a,5 g/1 Propargylalkohol . . . . . . . . . . . . . . . 3,09/1 Es ist bereits vorgeschlagen worden; Messingbäder ungesättigter Alkohole, und zwar Polyvinylalkohol, zur Glanzerhöhung zuzusetzen, jedoch hat man mehrfach ungesättigte Alkohole zur Erzeugung von Silberüberzügen bisher nicht benutzt.According to the invention it is now proposed to use electrolytes to which unsaturated alcohols have been added for the galvanic production of silver coatings. This results in a considerable increase in the current density. The precipitates produced in this way have a smooth and shiny surface and a noticeable increase in the degree of hardness. These advantages are also retained if carbon disulfide and / or sulfonated unsaturated oxyacids are added to the electrolyte to increase the gloss. example Silver as potassium silver cyanide ...... 30.09 / 1 Free potassium cyanide. . . . . . . . . . . . . . 5o, og / 1 Potassium carbonate. . . . . . . . . . . . . . . . . : 4o, og / 1 Caustic potash. . . . . . . . . . . . . . . . . . . . . . . . 3.0g / 1 r, q. Butynediol ........ . . . . . . . . . . . . a, 5 g / 1 Propargyl alcohol. . . . . . . . . . . . . . . 3.09 / 1 It has already been suggested; Brass baths of unsaturated alcohols, namely polyvinyl alcohol, to be added to increase the gloss, but polyunsaturated alcohols have hitherto not been used to produce silver coatings.

Claims (2)

PATENTANSPRÜCHE: z. Verfahren zum galvanischen Erzeugen von Silberüberzügen aus cyankalischenElektrolyten, dadurch gekennzeichnet, daß solche Elektrolyte verwendet werden, denen mehrfach ungesättigte Alkohole zugesetzt sind. PATENT CLAIMS: e.g. Process for the galvanic production of silver coatings of cyankali electrolytes, characterized in that such electrolytes are used to which polyunsaturated alcohols are added. 2. Verfahren nach Anspruch r, dadurch gekennzeichnet, daß Elektrolyte verwendet werden, die außer mehrfach ungesättigten Alkoholen noch Schwefelkohlenstoff und/oder sulfonierte ungesättigte Oxysäuren enthalten. -Angezogene Druckschriften: Deutsche Patentschrift Nr. 688 r55.2. The method according to claim r, characterized in that electrolytes are used, the except multiple unsaturated alcohols nor carbon disulfide and / or sulfonated unsaturated Contain oxy acids. - Referred publications: German Patent No. 688 r55.
DEK15234A 1952-08-21 1952-08-21 Process for the galvanic production of silver coatings from cyankcal electrolytes Expired DE921184C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEK15234A DE921184C (en) 1952-08-21 1952-08-21 Process for the galvanic production of silver coatings from cyankcal electrolytes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK15234A DE921184C (en) 1952-08-21 1952-08-21 Process for the galvanic production of silver coatings from cyankcal electrolytes

Publications (1)

Publication Number Publication Date
DE921184C true DE921184C (en) 1954-12-09

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
DEK15234A Expired DE921184C (en) 1952-08-21 1952-08-21 Process for the galvanic production of silver coatings from cyankcal electrolytes

Country Status (1)

Country Link
DE (1) DE921184C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1024305B (en) * 1955-01-31 1958-02-13 American Platinum Works Bath and process for the galvanic deposition of mirror-glossy coatings of silver and silver alloys

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE688155C (en) * 1938-12-08 1940-02-14 Degussa Baths for the electrolytic deposition of brass

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE688155C (en) * 1938-12-08 1940-02-14 Degussa Baths for the electrolytic deposition of brass

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1024305B (en) * 1955-01-31 1958-02-13 American Platinum Works Bath and process for the galvanic deposition of mirror-glossy coatings of silver and silver alloys

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