GB436481A - Improvements in or relating to the production of bright aluminium surfaces - Google Patents

Improvements in or relating to the production of bright aluminium surfaces

Info

Publication number
GB436481A
GB436481A GB10340/34A GB1034034A GB436481A GB 436481 A GB436481 A GB 436481A GB 10340/34 A GB10340/34 A GB 10340/34A GB 1034034 A GB1034034 A GB 1034034A GB 436481 A GB436481 A GB 436481A
Authority
GB
United Kingdom
Prior art keywords
coating
aluminium
per cent
treatment
group xxxvi
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
GB10340/34A
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.)
Howmet Aerospace Inc
Original Assignee
Aluminum Company of America
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 Aluminum Company of America filed Critical Aluminum Company of America
Publication of GB436481A publication Critical patent/GB436481A/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
    • C25D11/08—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing inorganic acids

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Laminated Bodies (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

436,481. Reflectors. ALUMINIUM CO. OF AMERICA, Gulf Building, Pittsburg, U.S.A.-(Assignees of Mason, R. B., and Tosterud, M.) April 5, 1934, No. 10340. Convention date, Feb. 10. [Class 97 (i)] [See also Group XXXVI] A highly reflecting surface is produced on articles of aluminium or its alloys by anodic treatment in an electrolyte containing chromic acid and hydrofluoric acid. Suitable proportions are 1À0-25À0 per cent of CrO3 and 0À2-1À5 per cent of HF. A thin transparent and colourless protective film is formed simultaneously with the brightening action. The surface may be further protected by coating with a clear lacquer or varnish, or by further anodic treatment in a sulphuric or oxalic bath to produce a clear transparent coating of aluminium oxide. The latter coating may be rendered impermeable by treatment in hot water at 80-100‹ C., as described in Specification 406,988, [Group XXXVI].
GB10340/34A 1934-02-10 1934-04-05 Improvements in or relating to the production of bright aluminium surfaces Expired GB436481A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US710722A US2040617A (en) 1934-02-10 1934-02-10 Method of producing bright surfaces on aluminum

Publications (1)

Publication Number Publication Date
GB436481A true GB436481A (en) 1935-10-07

Family

ID=24855239

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10340/34A Expired GB436481A (en) 1934-02-10 1934-04-05 Improvements in or relating to the production of bright aluminium surfaces

Country Status (6)

Country Link
US (1) US2040617A (en)
BE (1) BE407433A (en)
DE (1) DE635322C (en)
FR (1) FR778019A (en)
GB (1) GB436481A (en)
NL (2) NL41932C (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2550544A (en) * 1947-11-14 1951-04-24 Battelle Development Corp Method of anodically polishing aluminum
US2682502A (en) * 1950-07-19 1954-06-29 Kaiser Aluminium Chem Corp Method and material for electrolytically brightening aluminum surfaces
US2682503A (en) * 1950-07-19 1954-06-29 Kaiser Aluminium Chem Corp Method and material for electrolytically brightening aluminum surfaces
US3372008A (en) * 1961-05-29 1968-03-05 Philips Corp Metal reflector and method of manufacturing such reflectors
US3400057A (en) * 1964-06-03 1968-09-03 Reynolds Metals Co Alloy and finishing system
US3494839A (en) * 1967-01-23 1970-02-10 Amchem Prod Method of sealing chromic acid anodized aluminum surfaces
DE3917186A1 (en) * 1989-05-26 1990-11-29 Happich Gmbh Gebr CHEMICAL METHOD FOR AVOIDING A RAINBOW EFFECT Caused By The Oxide Layer Formed In The Shining Of Parts Of Aluminum Or Aluminum Alloys

Also Published As

Publication number Publication date
DE635322C (en) 1936-09-17
NL41932C (en)
US2040617A (en) 1936-05-12
BE407433A (en)
FR778019A (en) 1935-03-07
NL42124C (en)

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