FR2195697A1 - Anodising aluminium to produce thick films - using boric/hydroxy carboxylic chelate acid anions with sulphuric acid - Google Patents

Anodising aluminium to produce thick films - using boric/hydroxy carboxylic chelate acid anions with sulphuric acid

Info

Publication number
FR2195697A1
FR2195697A1 FR7228385A FR7228385A FR2195697A1 FR 2195697 A1 FR2195697 A1 FR 2195697A1 FR 7228385 A FR7228385 A FR 7228385A FR 7228385 A FR7228385 A FR 7228385A FR 2195697 A1 FR2195697 A1 FR 2195697A1
Authority
FR
France
Prior art keywords
boric
acid
chelate
hydroxy carboxylic
thick films
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.)
Granted
Application number
FR7228385A
Other languages
French (fr)
Other versions
FR2195697B1 (en
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.)
Innova Corp
Original Assignee
Innova Corp
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 Innova Corp filed Critical Innova Corp
Priority to DE19722238797 priority Critical patent/DE2238797A1/en
Priority to BE787287A priority patent/BE787287A/en
Priority to FR7228385A priority patent/FR2195697A1/en
Publication of FR2195697A1 publication Critical patent/FR2195697A1/en
Application granted granted Critical
Publication of FR2195697B1 publication Critical patent/FR2195697B1/fr
Granted 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
    • 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
    • C25D11/14—Producing integrally coloured layers

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Chemical Treatment Of Metals (AREA)

Abstract

Low resistance porous, bronze-coloured anodic coatings are produced on Al by immersing into an aqs. electrolyte consisting of boric hydroxycarboxylic chelate acid anions formed in equilibrium with boric acid, and a hydroxycarboxylic acid capable of forming a complex boric chelate with a resulting increase in H ion conc. of the electrolyte and at least 0.001 g/l sulphate ions from sulphuric acid, water soluble sulphate or bisulphate salts. The current density used during anodising is 12-36 A/ft2.
FR7228385A 1969-07-29 1972-08-07 Anodising aluminium to produce thick films - using boric/hydroxy carboxylic chelate acid anions with sulphuric acid Granted FR2195697A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE19722238797 DE2238797A1 (en) 1972-08-07 1972-08-07 METHOD FOR APPLYING ANODIC COATING TO A SUBSTRATE MADE OF ALUMINUM OR AN ALUMINUM ALLOY
BE787287A BE787287A (en) 1969-07-29 1972-08-07 Anodising aluminium to produce thick films - using boric/hydroxy carboxylic chelate acid anions with sulphuric acid
FR7228385A FR2195697A1 (en) 1972-08-07 1972-08-07 Anodising aluminium to produce thick films - using boric/hydroxy carboxylic chelate acid anions with sulphuric acid

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19722238797 DE2238797A1 (en) 1972-08-07 1972-08-07 METHOD FOR APPLYING ANODIC COATING TO A SUBSTRATE MADE OF ALUMINUM OR AN ALUMINUM ALLOY
FR7228385A FR2195697A1 (en) 1972-08-07 1972-08-07 Anodising aluminium to produce thick films - using boric/hydroxy carboxylic chelate acid anions with sulphuric acid

Publications (2)

Publication Number Publication Date
FR2195697A1 true FR2195697A1 (en) 1974-03-08
FR2195697B1 FR2195697B1 (en) 1976-08-13

Family

ID=25763673

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7228385A Granted FR2195697A1 (en) 1969-07-29 1972-08-07 Anodising aluminium to produce thick films - using boric/hydroxy carboxylic chelate acid anions with sulphuric acid

Country Status (2)

Country Link
DE (1) DE2238797A1 (en)
FR (1) FR2195697A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB447421A (en) * 1934-11-17 1936-05-18 Charles Hugh Roberts Gower Improvements in and relating to the production of anodic coatings on aluminium or aluminium alloys
CH287575A (en) * 1951-01-27 1952-12-15 S A Vernal Process of electrolytic oxidation of aluminum and its alloys.
FR1499692A (en) * 1965-11-12 1967-10-27 Contraves Ag Process for producing opaque protective layers on aluminum or aluminum alloy objects
US3616311A (en) * 1964-03-20 1971-10-26 Reynolds Metals Co Integral hard coat anodizing system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB447421A (en) * 1934-11-17 1936-05-18 Charles Hugh Roberts Gower Improvements in and relating to the production of anodic coatings on aluminium or aluminium alloys
CH287575A (en) * 1951-01-27 1952-12-15 S A Vernal Process of electrolytic oxidation of aluminum and its alloys.
US3616311A (en) * 1964-03-20 1971-10-26 Reynolds Metals Co Integral hard coat anodizing system
FR1499692A (en) * 1965-11-12 1967-10-27 Contraves Ag Process for producing opaque protective layers on aluminum or aluminum alloy objects

Also Published As

Publication number Publication date
DE2238797A1 (en) 1974-02-21
FR2195697B1 (en) 1976-08-13

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Legal Events

Date Code Title Description
ST Notification of lapse