GB447421A - Improvements in and relating to the production of anodic coatings on aluminium or aluminium alloys - Google Patents

Improvements in and relating to the production of anodic coatings on aluminium or aluminium alloys

Info

Publication number
GB447421A
GB447421A GB3315734A GB3315734A GB447421A GB 447421 A GB447421 A GB 447421A GB 3315734 A GB3315734 A GB 3315734A GB 3315734 A GB3315734 A GB 3315734A GB 447421 A GB447421 A GB 447421A
Authority
GB
United Kingdom
Prior art keywords
aluminium
acid
treatment
alloys
relating
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
GB3315734A
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
Priority to GB3315734A priority Critical patent/GB447421A/en
Publication of GB447421A publication Critical patent/GB447421A/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
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Optical Filters (AREA)

Abstract

447,421. Electrolytic surface treatment of aluminium and its alloys. GOWER, C. H. R., and BOWEN, E. WINDSOR-, Thames Factory, Rainville Road, Hammersmith, London. Nov. 17, 1934, No. 33157. [Class 41] The metals are coated by anodic treatment in a bath containing sulphuric acid and relatively small proportions of gallic acid and boric acid. Suitable proportions are 7-8“ fluid ounces of sulphuric acid, 0À55 ounces of gallic acid and 0À55 ounce of boric acid to 1 gallon of water. A current density of 8-12 amps. per sq. ft. and temperature 78-96‹ F., preferably 80-90‹ F., are employed. The period of treatment may be 30-40 minutes ; this is extended when the coating is to be subsequently dyed a dark colour. The coating operation may be preceded by anodic treatment for cleaning and the formation of a thin film of oxide as described in Specification 447,420.
GB3315734A 1934-11-17 1934-11-17 Improvements in and relating to the production of anodic coatings on aluminium or aluminium alloys Expired GB447421A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3315734A GB447421A (en) 1934-11-17 1934-11-17 Improvements in and relating to the production of anodic coatings on aluminium or aluminium alloys

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3315734A GB447421A (en) 1934-11-17 1934-11-17 Improvements in and relating to the production of anodic coatings on aluminium or aluminium alloys

Publications (1)

Publication Number Publication Date
GB447421A true GB447421A (en) 1936-05-18

Family

ID=10349273

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3315734A Expired GB447421A (en) 1934-11-17 1934-11-17 Improvements in and relating to the production of anodic coatings on aluminium or aluminium alloys

Country Status (1)

Country Link
GB (1) GB447421A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE749287C (en) * 1942-12-28 1944-11-21 Process for the production of protective coatings on aluminum and its alloys by means of anodic oxidation
US2918416A (en) * 1958-07-07 1959-12-22 Taylor Paul Hunt Electrolytic process for hard surfacing aluminum
US3276980A (en) * 1963-01-29 1966-10-04 Gen Motors Corp Method of anodizing aluminum
FR2195697A1 (en) * 1972-08-07 1974-03-08 Innova Corp Anodising aluminium to produce thick films - using boric/hydroxy carboxylic chelate acid anions with sulphuric acid

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE749287C (en) * 1942-12-28 1944-11-21 Process for the production of protective coatings on aluminum and its alloys by means of anodic oxidation
US2918416A (en) * 1958-07-07 1959-12-22 Taylor Paul Hunt Electrolytic process for hard surfacing aluminum
US3276980A (en) * 1963-01-29 1966-10-04 Gen Motors Corp Method of anodizing aluminum
FR2195697A1 (en) * 1972-08-07 1974-03-08 Innova Corp Anodising aluminium to produce thick films - using boric/hydroxy carboxylic chelate acid anions with sulphuric acid

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