GB1089496A - Forming conversion coatings on nickel-containing alloys by electrolytic action - Google Patents

Forming conversion coatings on nickel-containing alloys by electrolytic action

Info

Publication number
GB1089496A
GB1089496A GB2755965A GB2755965A GB1089496A GB 1089496 A GB1089496 A GB 1089496A GB 2755965 A GB2755965 A GB 2755965A GB 2755965 A GB2755965 A GB 2755965A GB 1089496 A GB1089496 A GB 1089496A
Authority
GB
United Kingdom
Prior art keywords
nickel
chromium
alloy
coloured
vanadium
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
GB2755965A
Inventor
Thomas Ernest Evans
Howard James
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.)
Inco Ltd
Original Assignee
Inco Ltd
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 Inco Ltd filed Critical Inco Ltd
Priority to GB2755965A priority Critical patent/GB1089496A/en
Publication of GB1089496A publication Critical patent/GB1089496A/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
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/34—Anodisation of metals or alloys not provided for in groups C25D11/04 - C25D11/32

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrodes For Compound Or Non-Metal Manufacture (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)

Abstract

Nickel or a nickel-containing alloy e.g. chromium-nickel austenitic steel or nickel-silver alloy, is coloured by the passage of A.C. while immersed as an electrode in an aqueous alkaline solution containing alkali metal cations and hydroxide ions or an oxy-anion of carbon, aluminium, silicon or phosphorus, chromium, vanadium, manganese, molybdenum, tungsten or titanium. A soluble chloride may also be included in the bath, while in the case of baths containing oxy-ions of chromium, vanadium or manganese a small proportion of sulphuric acid is preferably included. D.C. e.g. from an auxiliary electrode may be superimposed on the A.C. which may be applied between a pair of articles to be coloured. The treated article may be subsequently dyed. Reference is made to trating nickel alloys containing copper with or without zinc or nickel-chromium alloy. The preferred A.C. frequency is between 15 and 100 c/s and current densities between 100 and 1000 amps/sq.ft. are employed.
GB2755965A 1965-06-29 1965-06-29 Forming conversion coatings on nickel-containing alloys by electrolytic action Expired GB1089496A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2755965A GB1089496A (en) 1965-06-29 1965-06-29 Forming conversion coatings on nickel-containing alloys by electrolytic action

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2755965A GB1089496A (en) 1965-06-29 1965-06-29 Forming conversion coatings on nickel-containing alloys by electrolytic action

Publications (1)

Publication Number Publication Date
GB1089496A true GB1089496A (en) 1967-11-01

Family

ID=10261590

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2755965A Expired GB1089496A (en) 1965-06-29 1965-06-29 Forming conversion coatings on nickel-containing alloys by electrolytic action

Country Status (1)

Country Link
GB (1) GB1089496A (en)

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