GB806608A - Method of producing bright surfaces on aluminium and aluminium alloys - Google Patents
Method of producing bright surfaces on aluminium and aluminium alloysInfo
- Publication number
- GB806608A GB806608A GB35800/55A GB3580055A GB806608A GB 806608 A GB806608 A GB 806608A GB 35800/55 A GB35800/55 A GB 35800/55A GB 3580055 A GB3580055 A GB 3580055A GB 806608 A GB806608 A GB 806608A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- aluminium
- weight
- gum arabic
- nitric acid
- 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
- 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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F3/00—Brightening metals by chemical means
- C23F3/02—Light metals
- C23F3/03—Light metals with acidic solutions
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Printing Plates And Materials Therefor (AREA)
Abstract
Aluminium of purity 99.85 per cent or higher and alloys consisting of Al of a similar purity with up to 2.7 per cent Mg are surface brightened by treating for 8 to 30 seconds at between 40 DEG and 90 DEG C. with a solution containing 1.2 to 9.5 per cent by weight of nitric acid, 2 to 14 per cent by weight of hydrofluoric acid, and 0.025 to 0.2 per cent by weight of Pb ions in the form of soluble Pb salts, the remainder being water. An inhibitor such as gum arabic may also be present in amount 0.4 to 2 per cent by weight, whilst the Pb may be added as the nitrate of fluoride. The preferred solution contains 4.35 per cent nitric acid, 7 per cent hydrofluoric acid, 0.125 per cent Pb ion and 1 per cent gum arabic. The treated surface may be subsequently oxidized chemically or electrolytically for protection, or be coloured. Specifications 693,776, 693,876 and 738,711 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE806608X | 1954-12-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB806608A true GB806608A (en) | 1958-12-31 |
Family
ID=6722641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB35800/55A Expired GB806608A (en) | 1954-12-23 | 1955-12-13 | Method of producing bright surfaces on aluminium and aluminium alloys |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB806608A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3155556A (en) * | 1960-01-13 | 1964-11-03 | Vaw Ver Aluminium Werke Ag | Method for glossing articles made of aluminum and particularly pure aluminum and itsalloys |
| GB2328447A (en) * | 1997-08-16 | 1999-02-24 | British Aerospace | A desmutting solution for use prior to anodising |
-
1955
- 1955-12-13 GB GB35800/55A patent/GB806608A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3155556A (en) * | 1960-01-13 | 1964-11-03 | Vaw Ver Aluminium Werke Ag | Method for glossing articles made of aluminum and particularly pure aluminum and itsalloys |
| GB2328447A (en) * | 1997-08-16 | 1999-02-24 | British Aerospace | A desmutting solution for use prior to anodising |
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