GB1350292A - Sealing of anodized aluminum - Google Patents
Sealing of anodized aluminumInfo
- Publication number
- GB1350292A GB1350292A GB1350292DA GB1350292A GB 1350292 A GB1350292 A GB 1350292A GB 1350292D A GB1350292D A GB 1350292DA GB 1350292 A GB1350292 A GB 1350292A
- Authority
- GB
- United Kingdom
- Prior art keywords
- smudge
- sealing
- coating
- acid
- anodic oxide
- 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
- C25D11/24—Chemical after-treatment
- C25D11/246—Chemical after-treatment for sealing layers
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Printing Plates And Materials Therefor (AREA)
Abstract
1350292 Removing smudge from sealed anodized aluminium ALUMINUM CO OF AMERICA 16 June 1971 28218/71 Heading C7B A process for improving an anodic oxide coating which has not been organic dye coloured and which is present on an "aluminium" substrate comprises sealing the anodic oxide coating by treating it with an aqueous hydrolyzable metallic salt and removing at least some of the sealing smudge by treating the coating with at least one aqueous mineral acid to leave the anodic coating in a sealed condition. Any remaining smudge may be removed by wet wiping. The word "aluminium" is used to mean Al and Al base alloys containing 50 weight per cent or more by wt. of Al. The anodic oxide may be produced using a H 2 SO 4 or sulphophalic acid/ sulphuric acid electrolyte. The metallic salt of the sealing step may be an acetate or sulphate of Ni or Co. The acid of the smudge-removing step may be HNO 3 , HCl, H 2 SO 4 , H 3 PO 4 , H 2 CRO 4 or a mixture of two or more of these.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2821871 | 1971-06-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1350292A true GB1350292A (en) | 1974-04-18 |
Family
ID=10272197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1350292D Expired GB1350292A (en) | 1971-06-16 | 1971-06-16 | Sealing of anodized aluminum |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1350292A (en) |
-
1971
- 1971-06-16 GB GB1350292D patent/GB1350292A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |