GB447420A - 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
GB447420A
GB447420A GB3315634A GB3315634A GB447420A GB 447420 A GB447420 A GB 447420A GB 3315634 A GB3315634 A GB 3315634A GB 3315634 A GB3315634 A GB 3315634A GB 447420 A GB447420 A GB 447420A
Authority
GB
United Kingdom
Prior art keywords
acid
treatment
bath
aluminium
per cent
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
GB3315634A
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
Priority to BE412098D priority Critical patent/BE412098A/xx
Application filed by Individual filed Critical Individual
Priority to GB3315634A priority patent/GB447420A/en
Priority to FR797337D priority patent/FR797337A/en
Priority to DEG91496D priority patent/DE647427C/en
Publication of GB447420A publication Critical patent/GB447420A/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

Abstract

447,420. Electrolytic sur ace treatment of aluminium and its alloys. GOWER, C. H. R., and BOWEN, E. WINDSOR-, Thames Factory, Rainville Road, Hammersmith, London. Nov. 17, 1934, No. 33156. [Class 41] The articles are subjected to anodic treatment in a bath containing acetic acid and a relatively small proportion of phosphoric and sulphuric acids with or without boric acid, the bath being maintained in motion ; the metal is thereby cleaned and provided with a thin and even film of oxide which may then be thickened by further anodic treatment in usual baths. Suitable proportions are 10-15 per cent by volume of acetic acid, 2-2¢ per cent of phosphoric acid and 2¢-3 per cent of sulphuric acid together with ¢-1 oz. per gallon of boric acid. With current density 3-4 amps. per sq. ft. and temperature 80-90‹ F. the treatment is completed in 1-5 minutes. A coating sufficient for protective purposes may be obtained by extended treatment in the same bath or by further anodic treatment in a chromic acid, oxalic acid or other bath. Specifications 395,390, 396,743, 412,193, and 447,421 are referred to,
GB3315634A 1934-11-17 1934-11-17 Improvements in and relating to the production of anodic coatings on aluminium or aluminium alloys Expired GB447420A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE412098D BE412098A (en) 1934-11-17
GB3315634A GB447420A (en) 1934-11-17 1934-11-17 Improvements in and relating to the production of anodic coatings on aluminium or aluminium alloys
FR797337D FR797337A (en) 1934-11-17 1935-11-05 Process for treating the surface of objects made of aluminum or aluminum alloys, and objects treated by this process
DEG91496D DE647427C (en) 1934-11-17 1935-11-07 Process for anodic pretreatment of objects made of aluminum or aluminum alloys before the creation of protective layers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3315634A GB447420A (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
GB447420A true GB447420A (en) 1936-05-18

Family

ID=10349263

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3315634A Expired GB447420A (en) 1934-11-17 1934-11-17 Improvements in and relating to the production of anodic coatings on aluminium or aluminium alloys

Country Status (4)

Country Link
BE (1) BE412098A (en)
DE (1) DE647427C (en)
FR (1) FR797337A (en)
GB (1) GB447420A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE514705A (en) * 1951-06-25
JPS525010B2 (en) * 1971-12-24 1977-02-09
DE2256022C3 (en) * 1972-11-15 1984-05-10 Siemens AG, 1000 Berlin und 8000 München Electrolyte for forming aluminum foils for low-voltage electrolytic capacitors
US3915811A (en) * 1974-10-16 1975-10-28 Oxy Metal Industries Corp Method and composition for electroplating aluminum alloys

Also Published As

Publication number Publication date
FR797337A (en) 1936-04-24
DE647427C (en) 1937-07-03
BE412098A (en)

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