GB506836A - Improvements in or relating to the production of a protective and decorative coating on articles of magnesium and its alloys - Google Patents
Improvements in or relating to the production of a protective and decorative coating on articles of magnesium and its alloysInfo
- Publication number
- GB506836A GB506836A GB34897/37A GB3489737A GB506836A GB 506836 A GB506836 A GB 506836A GB 34897/37 A GB34897/37 A GB 34897/37A GB 3489737 A GB3489737 A GB 3489737A GB 506836 A GB506836 A GB 506836A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnesium
- per cent
- alloys
- sulphate
- 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
- 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
- C23C22/24—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 hexavalent chromium compounds
- C23C22/30—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 hexavalent chromium compounds containing also trivalent chromium
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
506,836. Coating magnesium and its alloys. DOW CHEMICAL CO. Dec. 16, 1937, No. 34897. Convention date, March 15. [Classes 82 (i) and 82 (ii)] A protective and decorative coating is formed upon articles of magnesium or of its alloys by treating with an aqueous solution containing chromic sulphate and an alkali metal chromate or bichromate. The solution preferably contains 1-20 per cent alkali metal chromate and 0À5-20 per cent chromic sulphate. Potassium or ammonium chromic sulphate may be the source of the sulphate. Other salts such as sodium or magnesium chloride or sulphate may be present. The article (e.g a magnesium alloy with 10 per cent Al, 0À1 per cent Mn, 0À5 per cent Si) is cleaned, immersed in the solution (preferably boiling) for 0À5-60 mins., rinsed, and dried.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US506836XA | 1937-03-15 | 1937-03-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB506836A true GB506836A (en) | 1939-06-06 |
Family
ID=21966743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB34897/37A Expired GB506836A (en) | 1937-03-15 | 1937-12-16 | Improvements in or relating to the production of a protective and decorative coating on articles of magnesium and its alloys |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB506836A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE739605C (en) * | 1939-12-07 | 1943-09-30 | Albert Butziger | Process for converting the surface of magnesium or magnesium alloys into an electrically non-conductive, corrosion-resistant layer |
-
1937
- 1937-12-16 GB GB34897/37A patent/GB506836A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE739605C (en) * | 1939-12-07 | 1943-09-30 | Albert Butziger | Process for converting the surface of magnesium or magnesium alloys into an electrically non-conductive, corrosion-resistant layer |
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