GB1005964A - Process for the application of finely crystalline phosphate layers on metal surfaces - Google Patents
Process for the application of finely crystalline phosphate layers on metal surfacesInfo
- Publication number
- GB1005964A GB1005964A GB24389/62A GB2438962A GB1005964A GB 1005964 A GB1005964 A GB 1005964A GB 24389/62 A GB24389/62 A GB 24389/62A GB 2438962 A GB2438962 A GB 2438962A GB 1005964 A GB1005964 A GB 1005964A
- Authority
- GB
- United Kingdom
- Prior art keywords
- litre
- barium
- grams
- zinc
- nitrate
- 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
- C23C22/22—Orthophosphates containing alkaline earth metal 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)
- Chemically Coating (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
A finely crystalline phosphate layer is applied to a surface of iron, steel, zinc or an alloy thereof by a solution containing 1-24 grams/ litre of zinc, at least 3.9 grams/litre of phosphate, 0.5-30 grams/litre of barium, the molar ratio of barium:zinc ranging from 0.075 to 5, the solution containing an accelerator, not more than 5 grams/litre of iron, and has a pH in the range 2.2-3.8. The barium is added as the nitrate, chloride or fluoride. The solution may also contain up to 30 grams/litre of ammonium ion and/or an alkali metal. The accelerator used may be a nitrate in amount such that the ratio NO3 : PO4 is 0.1-10.0. Other accelerators such as nitrite, chlorate, hydrogen peroxide or nitroguanidine may be used. The solution may be applied by immersion or spraying at a temperature in the range 40-100 DEG C. A composition for preparing or replenishing the bath may be in solid form or aqueous solution and comprises 4-24% of zinc, 6-43% of barium, 0.15-60% of accelerator, 8-50% of phosphate, 0.1-8% of urea and/or 0.1-16% of urea nitrate, the ratio of NO3:PO4 being 0.1-10.0 and the molar ratio of barium:zinc being 0.075-5.0. 0.1-20% of ammonium ion and/or alkali metal may also be present.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEF34266A DE1184589B (en) | 1961-06-24 | 1961-06-24 | Process and means for applying finely crystalline phosphate layers to metal surfaces |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1005964A true GB1005964A (en) | 1965-09-29 |
Family
ID=7095477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB24389/62A Expired GB1005964A (en) | 1961-06-24 | 1962-06-25 | Process for the application of finely crystalline phosphate layers on metal surfaces |
Country Status (4)
| Country | Link |
|---|---|
| CH (1) | CH436909A (en) |
| DE (1) | DE1184589B (en) |
| GB (1) | GB1005964A (en) |
| NL (1) | NL280018A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3906898A1 (en) * | 1989-03-03 | 1990-09-06 | Henkel Kgaa | ZINC-BARIUM PHOSPHATION OF METAL SURFACES |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE546673A (en) * | 1955-04-09 | |||
| DE1161742B (en) * | 1955-09-06 | 1964-01-23 | Amchem Prod | Solution and process for the production of phosphate layers on metals |
| US2901385A (en) * | 1957-10-30 | 1959-08-25 | Leo P Curtin | Micro-crystalline bonding coats for metal |
-
1961
- 1961-06-24 DE DEF34266A patent/DE1184589B/en active Pending
-
1962
- 1962-06-21 NL NL280018D patent/NL280018A/en unknown
- 1962-06-22 CH CH757562A patent/CH436909A/en unknown
- 1962-06-25 GB GB24389/62A patent/GB1005964A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CH436909A (en) | 1967-05-31 |
| DE1184589B (en) | 1964-12-31 |
| NL280018A (en) | 1964-11-25 |
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