GB522571A - Electrolytic production of protective coatings on aluminium - Google Patents

Electrolytic production of protective coatings on aluminium

Info

Publication number
GB522571A
GB522571A GB35947/38A GB3594738A GB522571A GB 522571 A GB522571 A GB 522571A GB 35947/38 A GB35947/38 A GB 35947/38A GB 3594738 A GB3594738 A GB 3594738A GB 522571 A GB522571 A GB 522571A
Authority
GB
United Kingdom
Prior art keywords
gms
aluminate
aluminium
sodium
silicate
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
GB35947/38A
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 GB522571A publication Critical patent/GB522571A/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
    • C25D11/18—After-treatment, e.g. pore-sealing
    • C25D11/20—Electrolytic after-treatment
    • 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
    • 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)
  • Chemical Treatment Of Metals (AREA)
  • Paints Or Removers (AREA)

Abstract

522,571. Electrolytic surface treatment of aluminium. FRASCH, J. Dec. 9, 1938, No. 35947. Convention date, Dec: 17, 1937. [Class 41] Articles of aluminium or its alloys are anodically oxidized in a solution of an aluminate, a silicate and a caustic base in amount not exceeding one-fifth of that of the aluminate and silicate together, the pH value being between 8.5 and 12. A suitable bath contains 30 gms. sodium aluminate, 10 gms. sodium silicate and 8 gms. caustic soda per litre. The temperature is maintained at 15‹C. by introduction of compressed air. Alternating, current of 110 volts may be employed. The article is withdrawn when the current has diminished approximately to zero. The article may be first treated by sand-blasting, polishing or brushing, or by immersion in nitric acid or caustic soda and then degreased electrolytically, or in a 5-10 per cent. solution of sodium carbonate or with ethylene trichloride. After coating the article is rinsed with water and with aqueous ammonia. It may then be immersed in a bath at 95‹C. of composition 20 gms. sodium aluminate, 20 gms. sodium silicate, 2 gms. caustic soda per litre.
GB35947/38A 1937-12-17 1938-12-09 Electrolytic production of protective coatings on aluminium Expired GB522571A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR840012T 1937-12-17

Publications (1)

Publication Number Publication Date
GB522571A true GB522571A (en) 1940-06-21

Family

ID=9299853

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35947/38A Expired GB522571A (en) 1937-12-17 1938-12-09 Electrolytic production of protective coatings on aluminium

Country Status (5)

Country Link
US (1) US2364964A (en)
BE (1) BE431557A (en)
CH (1) CH224221A (en)
FR (1) FR840012A (en)
GB (1) GB522571A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3376205A (en) * 1964-07-15 1968-04-02 Samuel L Cohn Method of reviving silicate sealing solutions

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2497036A (en) * 1944-07-12 1950-02-07 Cons Vultee Aircraft Corp Coating magnesium and magnesium base alloys
US2538831A (en) * 1946-07-09 1951-01-23 Cons Vultee Aircraft Corp Coloring of magnesium and alloys thereof
US3293158A (en) * 1963-09-17 1966-12-20 Mcneill William Anodic spark reaction processes and articles
US4166777A (en) * 1969-01-21 1979-09-04 Hoechst Aktiengesellschaft Corrosion resistant metallic plates particularly useful as support members for photo-lithographic plates and the like
US4551211A (en) * 1983-07-19 1985-11-05 Ube Industries, Ltd. Aqueous anodizing solution and process for coloring article of magnesium or magnesium-base alloy
CN105525326B (en) * 2014-12-22 2017-08-04 比亚迪股份有限公司 The preparation method and Al-alloy casing of a kind of Al-alloy casing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3376205A (en) * 1964-07-15 1968-04-02 Samuel L Cohn Method of reviving silicate sealing solutions

Also Published As

Publication number Publication date
US2364964A (en) 1944-12-12
CH224221A (en) 1942-11-15
BE431557A (en)
FR840012A (en) 1939-04-18

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