GB571271A - Electrolytic process for the protection of magnesium and its alloys - Google Patents
Electrolytic process for the protection of magnesium and its alloysInfo
- Publication number
- GB571271A GB571271A GB26169/39A GB2616939A GB571271A GB 571271 A GB571271 A GB 571271A GB 26169/39 A GB26169/39 A GB 26169/39A GB 2616939 A GB2616939 A GB 2616939A GB 571271 A GB571271 A GB 571271A
- Authority
- GB
- United Kingdom
- Prior art keywords
- manganese
- per cent
- layer
- sept
- articles
- 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
- C25D9/00—Electrolytic coating other than with metals
- C25D9/04—Electrolytic coating other than with metals with inorganic materials
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electroplating And Plating Baths Therefor (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
571,271. Electrolysis. FRASCH, J. Sept. 19, 1939, No. 26169. Convention date, Sept. 22, 1938. [Class 41] [Also in Group II] Articles of magnesium and its alloys are protected against corrosion by means of a layer of manganese oxide electro-deposited in an A.C. bath with the articles as electrodes and using chromium and manganese compounds, the cations of manganese being between 30 per cent and 50 per cent by weight of the anions containing chromium. Preferably. 10 per cent chromic, acid solution and 6-10 per cent manganese carbonate are employed, but other manganese compounds may be used, such as the peroxide, or manganese dichromate may provide both kinds. of ions. The pH of the bath is lower than 7, the current-density is 2-12 amps./dm.<2>, the voltage 4-40, and the time 5-15 minutes, at room temperature. The oxide-layer can be treated afterwards in alkaline solution or boiling water, or ca,n be painted, or given a final treatment in a silicate solution. The Specification as open to inspection under Sect. 91 states also that the protective layer can be imparted chemically and refers to manganese anions and to solutions containing 10 per cent chromic acid and 1-5 per cent manganese carbonate. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR221022X | 1938-09-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB571271A true GB571271A (en) | 1945-08-17 |
Family
ID=8881587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB26169/39A Expired GB571271A (en) | 1938-09-22 | 1939-09-19 | Electrolytic process for the protection of magnesium and its alloys |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2513237A (en) |
| CH (1) | CH221022A (en) |
| DE (1) | DE749368C (en) |
| GB (1) | GB571271A (en) |
| NL (1) | NL56499C (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE373447A (en) * | 1929-09-16 | |||
| US2114734A (en) * | 1935-03-30 | 1938-04-19 | Robert W Buzzard | Bath for and method of coating magnesium and its alloys |
| DE635720C (en) * | 1935-06-01 | 1936-09-25 | Siemens & Halske Akt Ges | Process for the production of protective coatings on magnesium and its alloys |
| US2206028A (en) * | 1936-11-27 | 1940-07-02 | Robert W Buzzard | Anodic treatment of magnesium |
| GB493935A (en) * | 1937-01-16 | 1938-10-17 | Hubert Sutton | Protection of magnesium and magnesium-rich alloys against corrosion by electrolytic methods |
| NL56619C (en) * | 1939-01-31 |
-
0
- NL NL56499D patent/NL56499C/xx active
-
1939
- 1939-09-19 GB GB26169/39A patent/GB571271A/en not_active Expired
- 1939-09-21 DE DEF87438D patent/DE749368C/en not_active Expired
- 1939-09-21 CH CH221022D patent/CH221022A/en unknown
-
1947
- 1947-07-23 US US763159A patent/US2513237A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| NL56499C (en) | |
| US2513237A (en) | 1950-06-27 |
| DE749368C (en) | 1944-11-22 |
| CH221022A (en) | 1942-05-15 |
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