GB449162A - Improvements in and relating to the surface treatment of aluminium and aluminium alloys - Google Patents

Improvements in and relating to the surface treatment of aluminium and aluminium alloys

Info

Publication number
GB449162A
GB449162A GB36187/34A GB3618734A GB449162A GB 449162 A GB449162 A GB 449162A GB 36187/34 A GB36187/34 A GB 36187/34A GB 3618734 A GB3618734 A GB 3618734A GB 449162 A GB449162 A GB 449162A
Authority
GB
United Kingdom
Prior art keywords
bath
aluminium
treatment
sodium
article
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
GB36187/34A
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.)
British Aluminum Co Ltd
Original Assignee
British Aluminum Co 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 British Aluminum Co Ltd filed Critical British Aluminum Co Ltd
Priority to GB36187/34A priority Critical patent/GB449162A/en
Priority to US52932A priority patent/US2096309A/en
Priority to FR798956D priority patent/FR798956A/en
Priority to DEB172180D priority patent/DE661266C/en
Publication of GB449162A publication Critical patent/GB449162A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F3/00—Electrolytic etching or polishing
    • C25F3/16—Polishing
    • C25F3/18—Polishing of light metals
    • C25F3/20—Polishing of light metals of aluminium
    • 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)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Electroplating Methods And Accessories (AREA)

Abstract

449,162. Electrolytic surface treatment of aluminium and its alloys. PULLEN, A. N. D., and BRITISH ALUMINIUM CO., Ltd., Adelaide House, King William Street, London. Dec. 17, 1934, No. 36187. [Class 41] The metals are treated to increase their specular reflectivity by immersion, after degreasing, in an aqueous solution containing sodium carbonate and sodium orthophosphate in the proportion 3 to 1 by weight and having a pH value of 10 or more, the bath being at a temperature of 75‹-85‹ C. ; the solution may contain in addition alkali metal salts such as borates or chromates. After about ten seconds immersion, the current is turned on with the article as anode the initial current density being about 30 amps per square foot, and treatment is maintained for 10-15 minutes. The article thus brightened carries a thin film of oxide ; after rinsing, a protective film is applied by anodic or alternating current treatment in an acid bath containing 5-40 per cent of sodium bisulphate. The bath is operated at 20‹-50‹ C. with current density 5 amps. per square foot for a period of 10-15 minutes. The sodium bisulphate bath may contain in addition sulphuric, chromic, boric, phosphoric or acetic acids or their salts, or chromium sulphate or chromium oxalate.
GB36187/34A 1934-12-17 1934-12-17 Improvements in and relating to the surface treatment of aluminium and aluminium alloys Expired GB449162A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB36187/34A GB449162A (en) 1934-12-17 1934-12-17 Improvements in and relating to the surface treatment of aluminium and aluminium alloys
US52932A US2096309A (en) 1934-12-17 1935-12-04 Surface treatment of aluminum and aluminum alloys
FR798956D FR798956A (en) 1934-12-17 1935-12-09 Improvements in the surface treatment of aluminum and aluminum alloys
DEB172180D DE661266C (en) 1934-12-17 1935-12-14 Process for increasing the reflectivity of the surfaces of aluminum and aluminum alloys

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB36187/34A GB449162A (en) 1934-12-17 1934-12-17 Improvements in and relating to the surface treatment of aluminium and aluminium alloys

Publications (1)

Publication Number Publication Date
GB449162A true GB449162A (en) 1936-06-17

Family

ID=10385767

Family Applications (1)

Application Number Title Priority Date Filing Date
GB36187/34A Expired GB449162A (en) 1934-12-17 1934-12-17 Improvements in and relating to the surface treatment of aluminium and aluminium alloys

Country Status (4)

Country Link
US (1) US2096309A (en)
DE (1) DE661266C (en)
FR (1) FR798956A (en)
GB (1) GB449162A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE763172C (en) * 1937-05-26 1953-05-11 Ver Alluminium Werke A G Process for the production of smooth and shiny surfaces on objects made of aluminum and aluminum alloys
US4169770A (en) 1978-02-21 1979-10-02 Alcan Research And Development Limited Electroplating aluminum articles
US4247378A (en) * 1979-09-07 1981-01-27 The British Aluminum Company Limited Electrobrightening of aluminium and aluminium-base alloys
FR2465017A1 (en) * 1979-09-07 1981-03-20 British Aluminium Co Ltd Electro-brightening aluminium and its alloys - in agitated aq. soln. of carbonate and phosphate
US8042598B2 (en) 2002-02-06 2011-10-25 Andersen Corporation Reduced visibility insect screen

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2506582A (en) * 1945-06-20 1950-05-09 Mateosian Edward Der Electrolytic polishing of metals
BE484777A (en) * 1947-09-24
FR1005928A (en) * 1947-10-17 1952-04-17 Fr Hispano Suiza Soc Improvements made to electrolytic polishing processes and baths for their implementation
US2671717A (en) * 1950-08-29 1954-03-09 Gen Electric Chemical brightening of aluminum
DE1009884B (en) * 1955-07-08 1957-06-06 Vaw Ver Aluminium Werke Ag Process for the pretreatment of workpieces made of aluminum or aluminum alloys for the production of high-gloss, anodically oxidized surfaces
US3041259A (en) * 1959-07-31 1962-06-26 Hanson Van Winkle Munning Co Cleaning aluminum surfaces
US3378669A (en) * 1967-06-30 1968-04-16 Olin Mathieson Method of making non-porous weld beads
US3622223A (en) * 1970-01-16 1971-11-23 Brakell Products Pty Ltd Projection screens
US4270957A (en) * 1977-06-03 1981-06-02 Ford Motor Company Method for cleaning aluminum articles
JPS5451936A (en) * 1977-09-30 1979-04-24 Shokosha Kk Electropolishing of aluminum and alloy thereof
FR2632963B1 (en) * 1988-06-15 1990-09-21 Pechiney Rhenalu PROCESS FOR GLUING RUBBER ON ALUMINUM
US10876211B2 (en) 2011-09-16 2020-12-29 Prc-Desoto International, Inc. Compositions for application to a metal substrate
CN112683203B (en) * 2021-01-08 2021-12-07 山东创新精密科技有限公司 Method for detecting coarse crystal layer of aluminum alloy

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE763172C (en) * 1937-05-26 1953-05-11 Ver Alluminium Werke A G Process for the production of smooth and shiny surfaces on objects made of aluminum and aluminum alloys
US4169770A (en) 1978-02-21 1979-10-02 Alcan Research And Development Limited Electroplating aluminum articles
US4247378A (en) * 1979-09-07 1981-01-27 The British Aluminum Company Limited Electrobrightening of aluminium and aluminium-base alloys
FR2465017A1 (en) * 1979-09-07 1981-03-20 British Aluminium Co Ltd Electro-brightening aluminium and its alloys - in agitated aq. soln. of carbonate and phosphate
US8042598B2 (en) 2002-02-06 2011-10-25 Andersen Corporation Reduced visibility insect screen

Also Published As

Publication number Publication date
FR798956A (en) 1936-05-29
US2096309A (en) 1937-10-19
DE661266C (en) 1938-06-15

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