GB735819A - Improvements in or relating to the coating of aluminium surfaces and to compositionstherefor - Google Patents
Improvements in or relating to the coating of aluminium surfaces and to compositionsthereforInfo
- Publication number
- GB735819A GB735819A GB735819DA GB735819A GB 735819 A GB735819 A GB 735819A GB 735819D A GB735819D A GB 735819DA GB 735819 A GB735819 A GB 735819A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sodium
- acid
- ammonium
- coating
- potassium
- 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
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)
- Chemically Coating (AREA)
Abstract
The surface of aluminium or an aluminium alloy is treated with a solution of hexavalent chromium and a fluorine compound in proportions sufficient to produce a coating on such surface, the solution also containing a soluble complex cyanide. The latter may be a ferrocyanide, ferricyanide, cobalticyanide, manganicyanide, chromic cyanide or cobaltocyanide, e.g. sodium, ammonium or potassium ferricyamide. Fluorine compounds referred to include sodium and ammonium fluosilicates, ammonium fluoride and bifluoride, hydrofluoric aid, hydrofluosilicic acid, sodium borofluoride and fluoboric acid; chromium compounds include chromic anhydride, potassium and sodium bichromates; and additional ingredients include boric acid, sodium aluminate and, to adjust pH, sulphuric acid and sodium bisulphate. U.S.A. Specifications 2,276,353 and 2,507,956 are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US320762XA | 1953-03-10 | 1953-03-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB735819A true GB735819A (en) | 1955-08-31 |
Family
ID=21862968
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB735819D Expired GB735819A (en) | 1953-03-10 | 1953-07-20 | Improvements in or relating to the coating of aluminium surfaces and to compositionstherefor |
Country Status (6)
Country | Link |
---|---|
BE (1) | BE521331A (en) |
CH (1) | CH320762A (en) |
DE (1) | DE976375C (en) |
FR (1) | FR1085484A (en) |
GB (1) | GB735819A (en) |
NL (2) | NL184345B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2993847A (en) * | 1958-04-04 | 1961-07-25 | Burroughs Corp | Aluminum treating process |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2796370A (en) * | 1955-03-04 | 1957-06-18 | Charles W Ostrander | Composition and method for producing corrosion resistant protective coating on aluminum and aluminum alloys |
US2796371A (en) * | 1955-03-16 | 1957-06-18 | Allied Res Products Inc | Corrosion resistant protective coating on aluminum and aluminum alloys |
BE566276A (en) * | 1957-08-19 | 1958-04-15 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2276353A (en) * | 1935-09-28 | 1942-03-17 | Parker Rust Proof Co | Process of coating |
FR840367A (en) * | 1937-12-31 | 1939-04-25 | Method and methods of treating metal surfaces | |
US2507956A (en) * | 1947-11-01 | 1950-05-16 | Lithographic Technical Foundat | Process of coating aluminum |
-
0
- NL NL95353D patent/NL95353C/xx active
- BE BE521331D patent/BE521331A/xx unknown
- NL NLAANVRAGE8301998,A patent/NL184345B/en unknown
-
1953
- 1953-06-19 DE DEA18243A patent/DE976375C/en not_active Expired
- 1953-07-02 FR FR1085484D patent/FR1085484A/en not_active Expired
- 1953-07-20 GB GB735819D patent/GB735819A/en not_active Expired
- 1953-12-01 CH CH320762D patent/CH320762A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2993847A (en) * | 1958-04-04 | 1961-07-25 | Burroughs Corp | Aluminum treating process |
Also Published As
Publication number | Publication date |
---|---|
FR1085484A (en) | 1955-02-02 |
CH320762A (en) | 1957-04-15 |
NL95353C (en) | |
BE521331A (en) | |
DE976375C (en) | 1963-07-25 |
NL184345B (en) |
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