GB631467A - Process for the electrolytic oxidation of aluminium and its alloys by means of alternating current - Google Patents

Process for the electrolytic oxidation of aluminium and its alloys by means of alternating current

Info

Publication number
GB631467A
GB631467A GB36595/46A GB3659546A GB631467A GB 631467 A GB631467 A GB 631467A GB 36595/46 A GB36595/46 A GB 36595/46A GB 3659546 A GB3659546 A GB 3659546A GB 631467 A GB631467 A GB 631467A
Authority
GB
United Kingdom
Prior art keywords
aluminium
direct current
alloys
secondary winding
alternating current
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
GB36595/46A
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.)
CIE DE PROD CHIM ET ELECTRO ME
Original Assignee
CIE DE PROD CHIM ET ELECTRO ME
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 CIE DE PROD CHIM ET ELECTRO ME filed Critical CIE DE PROD CHIM ET ELECTRO ME
Publication of GB631467A publication Critical patent/GB631467A/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
    • C25D3/00—Electroplating: Baths therefor
    • C25D3/66—Electroplating: Baths therefor from melts
    • 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
    • C25D11/024—Anodisation under pulsed or modulated current or potential
    • 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
    • C25D11/10—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing organic acids

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrolytic Production Of Metals (AREA)

Abstract

631,467. Electrolytic surface treatment of aluminium and its alloys. COMPAGNIE DE PRODUITS CHIMIQUES ET ELECTROMETALLURGIQUES ALAIS, FROGES, & CAMARGUE. Dec. 11, 1946, No. 36595. Convention date, Dec. 19, 1945. Drawings to Specifications. [Class 41] Electrolytic oxidation of aluminium and its alloys and in particular refined aluminium is effected by an alternating current on which is superposed a direct current component in relation to which the articles to be oxidised are connected as anodes, the intensity of the direct current component having a value lower than the amplitude of the alternating current. The colours of the oxide layer are varied by varying the intensity of the direct current component, which is given a value of the order of one quarter of the total current strength. The electrolyte used may be oxalic acid. In one arrangement the positive pole of a direct current source is connected to the centre tap of the secondary winding of an A.C. transformer and the negative pole to an intermediate electrode in the electrolysis bath between the two aluminium anodes connected one to each end of the secondary winding. Alternatively two cells having a common anode connection may be employed with the negative pole of the direct current source connected to the centre of the transformer secondary winding, the cathodes of the two cells being connected one to each end of this latter.
GB36595/46A 1945-12-19 1946-12-11 Process for the electrolytic oxidation of aluminium and its alloys by means of alternating current Expired GB631467A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR260588X 1945-12-19

Publications (1)

Publication Number Publication Date
GB631467A true GB631467A (en) 1949-11-03

Family

ID=8885004

Family Applications (1)

Application Number Title Priority Date Filing Date
GB36595/46A Expired GB631467A (en) 1945-12-19 1946-12-11 Process for the electrolytic oxidation of aluminium and its alloys by means of alternating current

Country Status (5)

Country Link
BE (1) BE469433A (en)
CH (1) CH260588A (en)
DE (1) DE970159C (en)
GB (1) GB631467A (en)
NL (1) NL69811C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4806436A (en) * 1984-08-06 1989-02-21 Showa Aluminum Corporation Substrate for amorphous silicon solar cells
RU168062U1 (en) * 2016-02-12 2017-01-17 Федеральное государственное автономное образовательное учреждение высшего образования "Белгородский государственный национальный исследовательский университет" (НИУ "БелГУ") Microarc oxidation processing plant

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE645206C (en) * 1935-11-05 1937-05-24 Ver Aluminium Werke Akt Ges Process for the electrolytic oxidation of aluminum and aluminum alloys using alternating current

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4806436A (en) * 1984-08-06 1989-02-21 Showa Aluminum Corporation Substrate for amorphous silicon solar cells
RU168062U1 (en) * 2016-02-12 2017-01-17 Федеральное государственное автономное образовательное учреждение высшего образования "Белгородский государственный национальный исследовательский университет" (НИУ "БелГУ") Microarc oxidation processing plant

Also Published As

Publication number Publication date
BE469433A (en)
DE970159C (en) 1958-08-21
CH260588A (en) 1949-03-31
NL69811C (en)

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