GB388787A - Improvements in and relating to the treatment of oxide coated aluminium and aluminium alloy surfaces - Google Patents
Improvements in and relating to the treatment of oxide coated aluminium and aluminium alloy surfacesInfo
- Publication number
- GB388787A GB388787A GB24756/31A GB2475631A GB388787A GB 388787 A GB388787 A GB 388787A GB 24756/31 A GB24756/31 A GB 24756/31A GB 2475631 A GB2475631 A GB 2475631A GB 388787 A GB388787 A GB 388787A
- Authority
- GB
- United Kingdom
- Prior art keywords
- aluminium
- loosening
- treatment
- treated
- oxide layer
- 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
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
- C25D11/18—After-treatment, e.g. pore-sealing
-
- 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
- C25D11/18—After-treatment, e.g. pore-sealing
- C25D11/24—Chemical after-treatment
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Treatment Of Metals (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Aluminium or aluminium alloy articles having a surface oxide layer produced electrolytically are treated with a solution, preferably hot, of a substance or substances adapted to soften and loosen the oxide layer and make it flexible, the oxide layer being then impregnated with filling, binding, or insulating substances such as paraffins, oils, waxes, lacquers, or resins. The softening and loosening substance may be a hydrate or carbonate of an alkaline-earth metal or an alkali metal, or inorganic acid, a salt of an alkali metal, e.g. potash alum, or an aluminium or chromium compound such as an aluminium or chromium soap. Examples are given of an aluminium wire electrolytically oxidized in a mixture of oxalic and chromic acids and then treated in a caustic soda solution at 30 DEG C., washed with cold water, treated with nitric acid to neutralize the caustic soda, and impregnated by dipping in molten paraffin; and of an aluminium wire electrolytically oxidized in sulphuric acid and then treated in a solution of potassium chlorate at 30 DEG C. and impregnated by coating with varnish or lacquer. The loosening and the impregnating may be carried out under pressures other than atmospheric and the loosening may be combined with a mechanical treatment, e.g. pressing or bending. A succession of loosening baths may be employed, the article being dried by heat between successive treatments. The Specification as open to inspection under Sect. 91 is not limited to the treatment of oxide layers produced electrolytically and also describes the following methods of loosening the oxide coating: (1) treatment with purely organic materials, for example such as are understood by the term "Quellstoffe"; (2) treatment with gases; (3) heating in a vacuum; (4) the reversion of the current in the case of an anodically produced oxide layer so that the aluminium article becomes the cathode. The use of dyestuffs as impregnating material is also referred to. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE388787X | 1930-09-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB388787A true GB388787A (en) | 1933-03-03 |
Family
ID=6371327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB24756/31A Expired GB388787A (en) | 1930-09-25 | 1931-09-03 | Improvements in and relating to the treatment of oxide coated aluminium and aluminium alloy surfaces |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB388787A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2448513A (en) * | 1942-11-26 | 1948-09-07 | Brennan | Electrostatic condenser plate |
| DE975939C (en) * | 1940-07-11 | 1962-12-13 | Siemens Ag | Process for the production of capacitors which have a dielectric which consists of oxides of the covering metal grown on metal coverings |
| EP2996939A4 (en) * | 2013-05-14 | 2016-12-28 | Saab Ab | Aircraft porous metal surface filled with wax and method in production line |
-
1931
- 1931-09-03 GB GB24756/31A patent/GB388787A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE975939C (en) * | 1940-07-11 | 1962-12-13 | Siemens Ag | Process for the production of capacitors which have a dielectric which consists of oxides of the covering metal grown on metal coverings |
| US2448513A (en) * | 1942-11-26 | 1948-09-07 | Brennan | Electrostatic condenser plate |
| EP2996939A4 (en) * | 2013-05-14 | 2016-12-28 | Saab Ab | Aircraft porous metal surface filled with wax and method in production line |
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