GB615848A - Process of providing magnesium and its alloys with a protective surface coating against corrosion - Google Patents
Process of providing magnesium and its alloys with a protective surface coating against corrosionInfo
- Publication number
- GB615848A GB615848A GB2423946A GB2423946A GB615848A GB 615848 A GB615848 A GB 615848A GB 2423946 A GB2423946 A GB 2423946A GB 2423946 A GB2423946 A GB 2423946A GB 615848 A GB615848 A GB 615848A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hydroxide
- alloys
- magnesium
- salts
- alkali
- 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
- C25D11/30—Anodisation of magnesium or alloys based thereon
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
615,848. Anodic coating of magnesium and its alloys. HAAG, K. G., and TRAGARDH, A. U. Aug. 15, 1946, No. 24239. [A Specification was laid open to inspection under Sect. 91 of the Acts, Aug. 15, 1946.] [Class 41] A protective surface coating of oxide or hydroxide is produced on a surface of magnesium or its alloys by anodic treatment in alkali hydroxide solutions containing in excess of 250 grams per litre of alkali hydroxide. One or more activating substances for maintaining the active state of the metal during the treatment may be added to the electrolyte. These substances comprise alkali metal salts of acids, the magnesium salts of which are substantially insoluble in water, e.g. carbonic, hydrofluoric, silicic, fluosilicic, boric, phosphoric, ferrocyanic, ferricyanic and formic acids which may be added to the hydroxide bath to produce the salts therein. In a specific example for treating an alloy containing zinc, a mixture of potassium and/or sodium hydroxide and lithium hydroxide is used. A bath containing between 300 and 450 grams per litre of alkali hydroxide is stated to give best results. Alternating or direct current or alternating superimposed on direct current may be employed. Specification 459,017 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2423946A GB615848A (en) | 1946-08-15 | 1946-08-15 | Process of providing magnesium and its alloys with a protective surface coating against corrosion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2423946A GB615848A (en) | 1946-08-15 | 1946-08-15 | Process of providing magnesium and its alloys with a protective surface coating against corrosion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB615848A true GB615848A (en) | 1949-01-12 |
Family
ID=10208615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2423946A Expired GB615848A (en) | 1946-08-15 | 1946-08-15 | Process of providing magnesium and its alloys with a protective surface coating against corrosion |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB615848A (en) |
-
1946
- 1946-08-15 GB GB2423946A patent/GB615848A/en not_active Expired
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