GB872321A - Phosphate coatings - Google Patents
Phosphate coatingsInfo
- Publication number
- GB872321A GB872321A GB88659A GB88659A GB872321A GB 872321 A GB872321 A GB 872321A GB 88659 A GB88659 A GB 88659A GB 88659 A GB88659 A GB 88659A GB 872321 A GB872321 A GB 872321A
- Authority
- GB
- United Kingdom
- Prior art keywords
- solution
- phosphate
- nitrate
- manganese
- sodium
- 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
- C23G1/081—Iron or steel solutions containing H2SO4
-
- 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
- C23C22/78—Pretreatment of the material to be coated
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Before being provided with a phosphate coating, steel is pickled in an aqueous sulphuric acid solution which is maintained free of simple ferrous ions. The ferrous ions may be removed from the pickling solution by (a) oxidation to the ferric state, e.g. by adding to the solution sodium nitrate, sodium bromate, potassium permanganate, ammonium persulphate, potassium dichromate, hydrogen peroxide, potassium iodate or ceric ammonium sulphate, (b) complexing, e.g. with ethylene-diaminetetraacetic acid or its sodium salt, or (c) absorption on an ion exchange resin. The pickling solution may also contain an inhibitor. Phosphating is preferably effected using a zinc, manganese or iron phosphate solution; specified solutions contain zinc, phosphate, nitrate and nickel, and manganese, phosphate and nitrate. Heavy coatings suitable for deep-drawing, pressing and extrusion are obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB88659A GB872321A (en) | 1959-01-09 | 1959-01-09 | Phosphate coatings |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB88659A GB872321A (en) | 1959-01-09 | 1959-01-09 | Phosphate coatings |
Publications (1)
Publication Number | Publication Date |
---|---|
GB872321A true GB872321A (en) | 1961-07-05 |
Family
ID=9712215
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB88659A Expired GB872321A (en) | 1959-01-09 | 1959-01-09 | Phosphate coatings |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB872321A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2210900A (en) * | 1987-10-13 | 1989-06-21 | Nihon Parkerizing | Phosphate coatings on metals |
EP0922787A1 (en) * | 1997-12-10 | 1999-06-16 | Imphy S.A. | Process for pickling stainless steel |
-
1959
- 1959-01-09 GB GB88659A patent/GB872321A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2210900A (en) * | 1987-10-13 | 1989-06-21 | Nihon Parkerizing | Phosphate coatings on metals |
GB2210900B (en) * | 1987-10-13 | 1991-11-20 | Nihon Parkerizing | Compositions and processes for forming phosphate coatings on metals |
EP0922787A1 (en) * | 1997-12-10 | 1999-06-16 | Imphy S.A. | Process for pickling stainless steel |
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