GB844266A - Method of producing thick and lustrous pale yellow gold alloy deposits - Google Patents

Method of producing thick and lustrous pale yellow gold alloy deposits

Info

Publication number
GB844266A
GB844266A GB30650/57A GB3065057A GB844266A GB 844266 A GB844266 A GB 844266A GB 30650/57 A GB30650/57 A GB 30650/57A GB 3065057 A GB3065057 A GB 3065057A GB 844266 A GB844266 A GB 844266A
Authority
GB
United Kingdom
Prior art keywords
white metal
gold
alloy plating
metal
copper alloy
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
GB30650/57A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB844266A publication Critical patent/GB844266A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
    • 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
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/48—After-treatment of electroplated surfaces

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrochemistry (AREA)
  • Mechanical Engineering (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)

Abstract

A method of producing gold alloy deposits of a pale yellow colour consists in electro-depositing a thick and adherent gold-copper alloy plating on a metal base and thereafter causing a whitening metal to penetrate by thermal diffusion into the said gold-copper alloy plating. Whitening metals are silver, zinc, cadmium, caesium, rubidium and selenium. Thermal diffusion of the white metal into the gold-copper alloy may be effected by the following methods:-(i) plunging the alloy plating into a melt of the white metal, removing it therefrom, and then heating under pressure, (ii) covering the alloy plating electrolytically with a thin coating of white metal and then heating under pressure, (iii) spraying liquid particles of white metal on to the alloy plating in a vacuum and then heating under pressure, (iv) exposing the alloy plating under reduced pressure to the vapour of the white metal by holding it over a vessel containing molten white metal, (v) placing the alloy plated articles in a drum in contact with powdered white metal and subjecting to heat and rotation. Examples disclose the treatment of an article, coated with gold-copper alloy, by dipping in molten cadmium; electrodepositing a thin layer of zinc; and heating with zinc or selenium powder.
GB30650/57A 1956-10-12 1957-10-01 Method of producing thick and lustrous pale yellow gold alloy deposits Expired GB844266A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH844266X 1956-10-12

Publications (1)

Publication Number Publication Date
GB844266A true GB844266A (en) 1960-08-10

Family

ID=4541647

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30650/57A Expired GB844266A (en) 1956-10-12 1957-10-01 Method of producing thick and lustrous pale yellow gold alloy deposits

Country Status (3)

Country Link
CH (1) CH354309A (en)
FR (1) FR1183940A (en)
GB (1) GB844266A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3157539A (en) * 1961-09-28 1964-11-17 Dreher Manfrid Method of producing shaped metallic bodies having a copper alloy base and a noble metal outer coating
US3172829A (en) * 1961-01-24 1965-03-09 Of an alloy to a support

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3172829A (en) * 1961-01-24 1965-03-09 Of an alloy to a support
US3157539A (en) * 1961-09-28 1964-11-17 Dreher Manfrid Method of producing shaped metallic bodies having a copper alloy base and a noble metal outer coating

Also Published As

Publication number Publication date
FR1183940A (en) 1959-07-15
CH354309A (en) 1961-05-15

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