GB709392A - Treatment of aluminium - Google Patents
Treatment of aluminiumInfo
- Publication number
- GB709392A GB709392A GB2571649A GB2571649A GB709392A GB 709392 A GB709392 A GB 709392A GB 2571649 A GB2571649 A GB 2571649A GB 2571649 A GB2571649 A GB 2571649A GB 709392 A GB709392 A GB 709392A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hydroxy
- acid
- organic
- chloro
- acids
- 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
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/34—Pretreatment of metallic surfaces to be electroplated
- C25D5/42—Pretreatment of metallic surfaces to be electroplated of light metals
- C25D5/44—Aluminium
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/12—Light metals
- C23G1/125—Light metals aluminium
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Electrochemistry (AREA)
- ing And Chemical Polishing (AREA)
Abstract
As a preliminary treatment to processes such as for example, oxidation processes, or plating chemically a metal surface consisting at least mainly of aluminium is treated to remove the surface film of oxide, by etching in an aqueous etchant of high total acidity containing both free chlorine ions and un-ionized but ionizable chlorine and a substance providing hydroxy groups, the chlorine ions and the hydroxy groups being provided at least in part by at least one chlorine derivative of an aliphatic acid or of a hydroxy-organic compound, or the chlorine ions being provided at least in part by hydrochloric acid or a chloride in acid solution and the hydroxy groups being provided at least in part by a hydroxy-organic acid or other hydroxy-organic substance, and if desired also in part by an inorganic acid containing hydroxy groups or a salt of such acid. Examples of chlorine derivatives of aliphatic acids or hydroxy-organic acids are mono-di-, and trichloracetic acid, mono-di- and tri-chlor-lactic acid, 2-chloro-1-hydroxy-butyric acid, 3-chloro-1-hydroxy-butyric acid. 1-chloro-2-hydroxy-isobutyric acid, and 1 - chloro - 2 - hydroxy - 1 methyl-succinic acid. A suitable chloride is aluminium chloride, suitable inorganic acids are phosphoric acid and suphuric acid, and suitable hydroxy organic acids are citric, tartaric, and lactic acids. Examples of other hydroxy organic compounds are glucose and dextrin. The metal surface may be cleaned before treatment by an alkaline solution, for example a 5 per cent. solution of sodium hydroxide. After etching the surface may be washed or rinsed with an inert solvent, examples of which are dioxane and ketones. Alternatively the etched surface may be washed with water. For plating by chemical displacement the etched surface should be washed thoroughly in an inert liquid, then finally given a time-controlled rinse in cold water. For nickel plating the bath may consist of a solution of nickel suphates, nickel chloride, ammonium citrate and a substance known under the Registered Trade Mark "Perminal Bx".
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2571649A GB709392A (en) | 1949-10-06 | 1949-10-06 | Treatment of aluminium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2571649A GB709392A (en) | 1949-10-06 | 1949-10-06 | Treatment of aluminium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB709392A true GB709392A (en) | 1954-05-26 |
Family
ID=10232122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2571649A Expired GB709392A (en) | 1949-10-06 | 1949-10-06 | Treatment of aluminium |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB709392A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0036672A1 (en) * | 1980-03-26 | 1981-09-30 | Mitsubishi Kasei Corporation | Process for preparing lithographic printing plate bases |
| GB2339799A (en) * | 1998-07-23 | 2000-02-09 | Magdelena Christiana Cor Stols | Cleaning composition containing tartaric acid |
-
1949
- 1949-10-06 GB GB2571649A patent/GB709392A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0036672A1 (en) * | 1980-03-26 | 1981-09-30 | Mitsubishi Kasei Corporation | Process for preparing lithographic printing plate bases |
| GB2339799A (en) * | 1998-07-23 | 2000-02-09 | Magdelena Christiana Cor Stols | Cleaning composition containing tartaric acid |
| US6200942B1 (en) | 1998-07-23 | 2001-03-13 | Magdelena Christiana Cornelia Stols | Cleaning composition |
| GB2339799B (en) * | 1998-07-23 | 2003-04-09 | Magdelena Christiana Cor Stols | A cleaning composition |
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