GB350420A - Improvements in or relating to the proofing of iron and steel against rust - Google Patents
Improvements in or relating to the proofing of iron and steel against rustInfo
- Publication number
- GB350420A GB350420A GB37882/29A GB3788229A GB350420A GB 350420 A GB350420 A GB 350420A GB 37882/29 A GB37882/29 A GB 37882/29A GB 3788229 A GB3788229 A GB 3788229A GB 350420 A GB350420 A GB 350420A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mixture
- diluted
- chromium
- solution
- iron
- 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
- C23C22/33—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 phosphates
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
In the process claimed in the parent Specification the stock solution of phosphates is prepared by dissolving each of the metals iron, aluminium, zinc and chromium in phosphoric acid (45 DEG Be) diluted to 12 DEG Be and then mixing the solutions. Chromium oxide may be used instead of chromium and an accelerator which consists of a solution of potassium bichromate, neutral potassium chromate and monobasic ammonium phosphate with or without naphthalene may be added to the mixture of phosphate solutions. The mixture is diluted to 3 DEG Be before use or it may be evaporated to dryness at a temperature below 90 DEG C. and the compound redissolved to form a 3 DEG Be solution. The articles to be rust-proofed are immersed in the nearly boiling diluted mixture for from 1 to 1 1/2 hours.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB37882/29A GB350420A (en) | 1929-12-10 | 1929-12-10 | Improvements in or relating to the proofing of iron and steel against rust |
US431048A US1826866A (en) | 1929-12-10 | 1930-02-24 | Proofing of metal against corrosion and particularly of iron and steel against rust |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB37882/29A GB350420A (en) | 1929-12-10 | 1929-12-10 | Improvements in or relating to the proofing of iron and steel against rust |
Publications (1)
Publication Number | Publication Date |
---|---|
GB350420A true GB350420A (en) | 1931-06-10 |
Family
ID=10399672
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB37882/29A Expired GB350420A (en) | 1929-12-10 | 1929-12-10 | Improvements in or relating to the proofing of iron and steel against rust |
Country Status (2)
Country | Link |
---|---|
US (1) | US1826866A (en) |
GB (1) | GB350420A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2418608A (en) * | 1939-05-22 | 1947-04-08 | Parker Rust Proof Co | Corrosion-resistant metallic article and method of making the same |
US2564864A (en) * | 1948-07-02 | 1951-08-21 | Parker Rust Proof Co | Method of and solution for increasing resistance to corrosion |
US3219489A (en) * | 1962-05-24 | 1965-11-23 | Conversion Chem Corp | Composition and method for blackening the surfaces of cadmium and zinc |
-
1929
- 1929-12-10 GB GB37882/29A patent/GB350420A/en not_active Expired
-
1930
- 1930-02-24 US US431048A patent/US1826866A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US1826866A (en) | 1931-10-13 |
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