GB759222A - An electrolytic process for smoothing and polishing surfaces of gold alloys - Google Patents

An electrolytic process for smoothing and polishing surfaces of gold alloys

Info

Publication number
GB759222A
GB759222A GB17869/54A GB1786954A GB759222A GB 759222 A GB759222 A GB 759222A GB 17869/54 A GB17869/54 A GB 17869/54A GB 1786954 A GB1786954 A GB 1786954A GB 759222 A GB759222 A GB 759222A
Authority
GB
United Kingdom
Prior art keywords
gold
thiourea
metal
baser
smoothing
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
GB17869/54A
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
Deutsche Gold und Silber Scheideanstalt
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, Deutsche Gold und Silber Scheideanstalt filed Critical Degussa GmbH
Publication of GB759222A publication Critical patent/GB759222A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F3/00—Electrolytic etching or polishing
    • C25F3/16—Polishing
    • C25F3/22—Polishing of heavy metals

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Electroplating And Plating Baths Therefor (AREA)

Abstract

759,222. Electrolytic polishing of gold alloys. DEUTSCHE GOLD-UND SILBER-SCHEIDEANSTALT VORM. ROESSLER. June 17, 1954 [June 27, 1953], No. 17869/54. Addition to 723,945. Class 41. The process claimed in the parent Specification for the anodic polishing of the surface of an article of an alloy of gold with one or more baser metals is modified by including in the acid thiourea solution at least one metal compound yielding ions of the baser metal, or one of the baser metals. The metal compound may be one yielding ions of the basest metal in the alloy, and may be a copper salt, e.g. the copper salt of thiourea or copper sulphate, or may be a nickel salt, and may be in the proportion of 0.03 to 0.3 mol. per mol. of thiourea. The article is moved intermittently to assist in dissolving the anode coating formed during the process.
GB17869/54A 1953-06-27 1954-06-17 An electrolytic process for smoothing and polishing surfaces of gold alloys Expired GB759222A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE330375X 1953-06-27
CH313570T 1954-05-26

Publications (1)

Publication Number Publication Date
GB759222A true GB759222A (en) 1956-10-17

Family

ID=25735958

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17869/54A Expired GB759222A (en) 1953-06-27 1954-06-17 An electrolytic process for smoothing and polishing surfaces of gold alloys

Country Status (4)

Country Link
US (1) US2712525A (en)
CH (1) CH330375A (en)
FR (1) FR1102393A (en)
GB (1) GB759222A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4686017A (en) * 1981-11-05 1987-08-11 Union Oil Co. Of California Electrolytic bath and methods of use
US4755265A (en) * 1985-06-28 1988-07-05 Union Oil Company Of California Processes for the deposition or removal of metals
US4801511A (en) * 1985-06-28 1989-01-31 Union Oil Company Of California Battery cell electrolyte

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE888492C (en) * 1951-09-20 1953-09-03 Degussa Process for electropolishing gold and gold alloys

Also Published As

Publication number Publication date
FR1102393A (en) 1955-10-19
US2712525A (en) 1955-07-05
CH330375A (en) 1958-05-31

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