GB643877A - Improved surface treatment of magnesium alloys - Google Patents
Improved surface treatment of magnesium alloysInfo
- Publication number
- GB643877A GB643877A GB2278247A GB2278247A GB643877A GB 643877 A GB643877 A GB 643877A GB 2278247 A GB2278247 A GB 2278247A GB 2278247 A GB2278247 A GB 2278247A GB 643877 A GB643877 A GB 643877A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- acid
- salt
- remainder
- surface treatment
- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/34—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides
- C23C22/37—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides containing also hexavalent chromium compounds
Abstract
Magnesium base alloys containing aluminium are subjected to the action of an aqueous solution of chromic acid or a salt thereof, another strong acid in a concentration sufficient to maintain the pH value of the solution below 2.0 and hydrofluoric acid or a salt thereof in a proportion corresponding to between 0.06 and 1.7 per cent by weight of combined fluorines in the solution. The acid is preferably nitric but may be sulphuric or hydrochloric, the chromic acid salt may be sodium bichromate and the fluoride may be sodium fluoride or ammonium bifluoride. The alloy may also contain manganese, silicion, zinc or silver; for instance: 10 per cent Al, 0.5 per cent Si, 0.1 per cent Mn, remainder Mg; 9 per cent Al, 2.0 per cent Zn, 0.1 per cent Mn, remainder Mg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2278247A GB643877A (en) | 1947-08-15 | 1947-08-15 | Improved surface treatment of magnesium alloys |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2278247A GB643877A (en) | 1947-08-15 | 1947-08-15 | Improved surface treatment of magnesium alloys |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB643877A true GB643877A (en) | 1950-09-27 |
Family
ID=10185000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2278247A Expired GB643877A (en) | 1947-08-15 | 1947-08-15 | Improved surface treatment of magnesium alloys |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB643877A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1131068B (en) * | 1957-03-08 | 1962-06-07 | Amchem Prod | Solution for the production of chromate coatings on magnesium |
| FR2589485A1 (en) * | 1985-11-05 | 1987-05-07 | Nippon Telegraph & Telephone | Surface-treated magnesium or magnesium alloy and process for the surface-treatment of magnesium or of a magnesium alloy |
| CN102002705A (en) * | 2010-10-27 | 2011-04-06 | 大连三达奥克化学股份有限公司 | Surface modifier for manganese phosphating and preparation method thereof |
-
1947
- 1947-08-15 GB GB2278247A patent/GB643877A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1131068B (en) * | 1957-03-08 | 1962-06-07 | Amchem Prod | Solution for the production of chromate coatings on magnesium |
| FR2589485A1 (en) * | 1985-11-05 | 1987-05-07 | Nippon Telegraph & Telephone | Surface-treated magnesium or magnesium alloy and process for the surface-treatment of magnesium or of a magnesium alloy |
| US4973393A (en) * | 1985-11-05 | 1990-11-27 | Nippon Telegraph And Telephone Corp. | Surface-treated magnesium or magnesium-alloy and process for surface treatment of magnesium or magnesium alloy |
| CN102002705A (en) * | 2010-10-27 | 2011-04-06 | 大连三达奥克化学股份有限公司 | Surface modifier for manganese phosphating and preparation method thereof |
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