GB522571A - Electrolytic production of protective coatings on aluminium - Google Patents
Electrolytic production of protective coatings on aluminiumInfo
- Publication number
- GB522571A GB522571A GB35947/38A GB3594738A GB522571A GB 522571 A GB522571 A GB 522571A GB 35947/38 A GB35947/38 A GB 35947/38A GB 3594738 A GB3594738 A GB 3594738A GB 522571 A GB522571 A GB 522571A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gms
- aluminate
- aluminium
- sodium
- silicate
- 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
- C25D11/20—Electrolytic after-treatment
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
- Paints Or Removers (AREA)
Abstract
522,571. Electrolytic surface treatment of aluminium. FRASCH, J. Dec. 9, 1938, No. 35947. Convention date, Dec: 17, 1937. [Class 41] Articles of aluminium or its alloys are anodically oxidized in a solution of an aluminate, a silicate and a caustic base in amount not exceeding one-fifth of that of the aluminate and silicate together, the pH value being between 8.5 and 12. A suitable bath contains 30 gms. sodium aluminate, 10 gms. sodium silicate and 8 gms. caustic soda per litre. The temperature is maintained at 15‹C. by introduction of compressed air. Alternating, current of 110 volts may be employed. The article is withdrawn when the current has diminished approximately to zero. The article may be first treated by sand-blasting, polishing or brushing, or by immersion in nitric acid or caustic soda and then degreased electrolytically, or in a 5-10 per cent. solution of sodium carbonate or with ethylene trichloride. After coating the article is rinsed with water and with aqueous ammonia. It may then be immersed in a bath at 95‹C. of composition 20 gms. sodium aluminate, 20 gms. sodium silicate, 2 gms. caustic soda per litre.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR840012T | 1937-12-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB522571A true GB522571A (en) | 1940-06-21 |
Family
ID=9299853
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB35947/38A Expired GB522571A (en) | 1937-12-17 | 1938-12-09 | Electrolytic production of protective coatings on aluminium |
Country Status (5)
Country | Link |
---|---|
US (1) | US2364964A (en) |
BE (1) | BE431557A (en) |
CH (1) | CH224221A (en) |
FR (1) | FR840012A (en) |
GB (1) | GB522571A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3376205A (en) * | 1964-07-15 | 1968-04-02 | Samuel L Cohn | Method of reviving silicate sealing solutions |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2497036A (en) * | 1944-07-12 | 1950-02-07 | Cons Vultee Aircraft Corp | Coating magnesium and magnesium base alloys |
US2538831A (en) * | 1946-07-09 | 1951-01-23 | Cons Vultee Aircraft Corp | Coloring of magnesium and alloys thereof |
US3293158A (en) * | 1963-09-17 | 1966-12-20 | Mcneill William | Anodic spark reaction processes and articles |
US4166777A (en) * | 1969-01-21 | 1979-09-04 | Hoechst Aktiengesellschaft | Corrosion resistant metallic plates particularly useful as support members for photo-lithographic plates and the like |
US4551211A (en) * | 1983-07-19 | 1985-11-05 | Ube Industries, Ltd. | Aqueous anodizing solution and process for coloring article of magnesium or magnesium-base alloy |
CN105525326B (en) * | 2014-12-22 | 2017-08-04 | 比亚迪股份有限公司 | The preparation method and Al-alloy casing of a kind of Al-alloy casing |
-
0
- BE BE431557D patent/BE431557A/xx unknown
-
1937
- 1937-12-17 FR FR840012D patent/FR840012A/en not_active Expired
-
1938
- 1938-12-09 GB GB35947/38A patent/GB522571A/en not_active Expired
- 1938-12-10 CH CH224221D patent/CH224221A/en unknown
- 1938-12-14 US US245780A patent/US2364964A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3376205A (en) * | 1964-07-15 | 1968-04-02 | Samuel L Cohn | Method of reviving silicate sealing solutions |
Also Published As
Publication number | Publication date |
---|---|
CH224221A (en) | 1942-11-15 |
BE431557A (en) | |
US2364964A (en) | 1944-12-12 |
FR840012A (en) | 1939-04-18 |
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