GB704953A - Improvements in or relating to processes of electrolytic polishing of metals - Google Patents
Improvements in or relating to processes of electrolytic polishing of metalsInfo
- Publication number
- GB704953A GB704953A GB1657150A GB1657150A GB704953A GB 704953 A GB704953 A GB 704953A GB 1657150 A GB1657150 A GB 1657150A GB 1657150 A GB1657150 A GB 1657150A GB 704953 A GB704953 A GB 704953A
- Authority
- GB
- United Kingdom
- Prior art keywords
- article
- film
- chromic
- acids
- 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
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F3/00—Electrolytic etching or polishing
- C25F3/16—Polishing
- C25F3/18—Polishing of light metals
- C25F3/20—Polishing of light metals of aluminium
Abstract
A process of producing a smooth lustrous surface on articles, for example, electric torch cases, of aluminium or aluminium-rich alloys, consists in immersing the article at an elevated temperature in an electrolyte containing phosphoric acid, sulphuric acid, an organic substance within the group consisting of aliphatic-polyhydric alcohols and ether alcohols soluble in phosphoric acid, and water, for a short period without the application of a voltage, whereby etching is effected, and then subjecting the immersed article to direct current voltage, the article being made anode in the bath. The alcohol may be an alkylene glycol or ether thereof having a boiling point above 120 DEG C. After the polishing process the article may be immersed in a solution of caustic soda, in a mixture of chromic anc phosphoric acids or chromic and sulphuric acids, or in solutions of the salts of these acids, to remove surface film, the article thereafter being anodized in a bath containing chromic acid to obtain an opaque film or sulphuric acid to obtain a transparent film. The film may be dyed and sealed by immersion in hot water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1657150A GB704953A (en) | 1950-07-03 | 1950-07-03 | Improvements in or relating to processes of electrolytic polishing of metals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1657150A GB704953A (en) | 1950-07-03 | 1950-07-03 | Improvements in or relating to processes of electrolytic polishing of metals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB704953A true GB704953A (en) | 1954-03-03 |
Family
ID=10079707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1657150A Expired GB704953A (en) | 1950-07-03 | 1950-07-03 | Improvements in or relating to processes of electrolytic polishing of metals |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB704953A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4396470A (en) * | 1980-10-23 | 1983-08-02 | Vickers P.L.C. | Lithographic printing plates |
| GB2121073A (en) * | 1982-04-07 | 1983-12-14 | Pyrene Chemical Services Ltd | Aqueous fluoride-free aluminium cleaning composition |
-
1950
- 1950-07-03 GB GB1657150A patent/GB704953A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4396470A (en) * | 1980-10-23 | 1983-08-02 | Vickers P.L.C. | Lithographic printing plates |
| GB2121073A (en) * | 1982-04-07 | 1983-12-14 | Pyrene Chemical Services Ltd | Aqueous fluoride-free aluminium cleaning composition |
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