GB629562A - Improvements in and relating to methods and compositions for treating metal surfaces - Google Patents
Improvements in and relating to methods and compositions for treating metal surfacesInfo
- Publication number
- GB629562A GB629562A GB11365/47A GB1136547A GB629562A GB 629562 A GB629562 A GB 629562A GB 11365/47 A GB11365/47 A GB 11365/47A GB 1136547 A GB1136547 A GB 1136547A GB 629562 A GB629562 A GB 629562A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- iron
- compositions
- phosphates
- alloys
- 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
- C23C22/07—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 phosphates
- C23C22/08—Orthophosphates
Abstract
Surfaces of iron, zinc, copper, aluminium or their alloys are cleaned-and in the case of iron, zinc or their alloys are also coated -by treatment with an aqueous solution containing both primary and secondary alkali (including ammonium) phosphates having a pH value not less than 5 nor more than 6, the actual pH value being greater than that corresponding to the monobasic phosphate present alone and less than that corresponding to the dibasic phosphate present alone. The solution may also contain 0.1-2.0 per cent of ferric or aluminium ortho-phosphate; an oxidizing agent such as a nitrate, nitrite, organic nitro-compounds, or hydrogen peroxide; ions (0.0002-0.01 per cent) of copper, silver, nickel or ferrous iron; a wetting agent; and an anti-foaming agent. The invention comprises also compositions of the compounds set out above which are adapted on solution in water to produce the treating solutions referred to, the molar ratio of the primary to the secondary alkali phosphates being preferably between 32:1 and 5.6:1, and the composition being at least 75 per cent alkali phosphates. Specifications 510,684, 517,049 and 596,876 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US629562XA | 1946-04-26 | 1946-04-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB629562A true GB629562A (en) | 1949-09-22 |
Family
ID=22045954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB11365/47A Expired GB629562A (en) | 1946-04-26 | 1947-04-28 | Improvements in and relating to methods and compositions for treating metal surfaces |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB629562A (en) |
-
1947
- 1947-04-28 GB GB11365/47A patent/GB629562A/en not_active Expired
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