GB612151A - Improvements relating to phosphate coating processes - Google Patents
Improvements relating to phosphate coating processesInfo
- Publication number
- GB612151A GB612151A GB1428946A GB1428946A GB612151A GB 612151 A GB612151 A GB 612151A GB 1428946 A GB1428946 A GB 1428946A GB 1428946 A GB1428946 A GB 1428946A GB 612151 A GB612151 A GB 612151A
- Authority
- GB
- United Kingdom
- Prior art keywords
- solution
- zinc
- phosphate
- primary phosphate
- tertiary
- 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
- C23C22/18—Orthophosphates containing manganese cations
-
- 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
- C23C22/12—Orthophosphates containing zinc cations
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
A process for producing a zinc phosphate coating on a metallic surface in which the metallic surface is brought into contact with a solution of zinc primary phosphate at not exceeding 45 DEG C., which solution contains no copper compound and is in equilibrium with zinc tertiary phosphate, i.e., the solution is incapable of dissolving any more tertiary phosphate at the temperature of operation. When the metal surface is zinc, a modified solution is employed, viz., of a primary phosphate other than zinc, e.g. manganese which dissociates to give a solution having not more free phosphoric acid than a solution of zinc primary phosphate of equimolecular strength and at the same temperature. After application the solution may be allowed to dry. The solution may contain one or more oxidizing accelerators and may be treated continuously or intermittently to maintain equilibrium. Equilibrium may be produced or maintained by bringing the solution into intimate contact with the tertiary phosphate of the metal whose primary phosphate it contains. The tertiary phosphate may be in a sludge which has separated from the said solution. In addition to zinc primary phosphate the solution may contain up to two molecular equivalents of another mineral acid salt or salts of zinc per molecular equivalent of zinc primary phosphate. Specification 386,739, [Group II] is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1428946A GB612151A (en) | 1946-05-11 | 1946-05-11 | Improvements relating to phosphate coating processes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1428946A GB612151A (en) | 1946-05-11 | 1946-05-11 | Improvements relating to phosphate coating processes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB612151A true GB612151A (en) | 1948-11-09 |
Family
ID=10038475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1428946A Expired GB612151A (en) | 1946-05-11 | 1946-05-11 | Improvements relating to phosphate coating processes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB612151A (en) |
-
1946
- 1946-05-11 GB GB1428946A patent/GB612151A/en not_active Expired
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