NL7210807A - 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 acidInfo
- Publication number
- NL7210807A NL7210807A NL7210807A NL7210807A NL7210807A NL 7210807 A NL7210807 A NL 7210807A NL 7210807 A NL7210807 A NL 7210807A NL 7210807 A NL7210807 A NL 7210807A NL 7210807 A NL7210807 A NL 7210807A
- Authority
- NL
- Netherlands
- Prior art keywords
- boric
- acid
- chelate
- hydroxy carboxylic
- thick films
- Prior art date
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
- C25D11/14—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)
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.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL7210807A NL7210807A (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 (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL7210807A NL7210807A (en) | 1972-08-07 | 1972-08-07 | Anodising aluminium to produce thick films - using boric/hydroxy carboxylic chelate acid anions with sulphuric acid |
Publications (1)
Publication Number | Publication Date |
---|---|
NL7210807A true NL7210807A (en) | 1974-02-11 |
Family
ID=19816668
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL7210807A NL7210807A (en) | 1972-08-07 | 1972-08-07 | Anodising aluminium to produce thick films - using boric/hydroxy carboxylic chelate acid anions with sulphuric acid |
Country Status (1)
Country | Link |
---|---|
NL (1) | NL7210807A (en) |
-
1972
- 1972-08-07 NL NL7210807A patent/NL7210807A/en unknown
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