GB2080835B - Prevention of sludge in phosphating baths - Google Patents
Prevention of sludge in phosphating bathsInfo
- Publication number
- GB2080835B GB2080835B GB8118780A GB8118780A GB2080835B GB 2080835 B GB2080835 B GB 2080835B GB 8118780 A GB8118780 A GB 8118780A GB 8118780 A GB8118780 A GB 8118780A GB 2080835 B GB2080835 B GB 2080835B
- Authority
- GB
- United Kingdom
- Prior art keywords
- solution
- phosphate
- chlorate
- oxidising
- ferrous
- 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
- C23C22/34—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 fluorides or complex fluorides
- C23C22/36—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 fluorides or complex fluorides containing also phosphates
- C23C22/362—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 fluorides or complex fluorides containing also phosphates containing also zinc 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
- C23C22/14—Orthophosphates containing zinc cations containing also chlorate anions
-
- 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)
- Metallurgy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
- Materials For Medical Uses (AREA)
- Glass Compositions (AREA)
- Paints Or Removers (AREA)
- Treatment Of Sludge (AREA)
Abstract
Phosphate coatings are formed on ferrous surfaces by dipping or flooding the surfaces with an acidic zinc phosphate solution containing a high zinc content, nitrate or other oxidising agent incapable of oxidising ferrous to ferric and a low controlled amount of chlorate or other oxidising agent capable of oxidising ferrous to ferric such that the solution contains 0.05 to 1% dissolved iron. This process can be achieved but using novel replenishment and make up solutions. The initial make up solution may be free of chlorate but the replenishment solution will contain a low amount of chlorate or other suitable oxidising agent. The phosphating solution preferably has a zinc/phosphate ratio in the range 0.8-4, a Zn/Ca ratio of 1-4 and a total acid/free acid ratio of 5-9. Use of the solution gives rise to reduced sludge production. The solution may contain conventional additives such as Cu, Co, Ni, fluorides, urea. The surfaces to be treated may first be pickled, degreased then preactivated with either hot water or a titanium ortho- phosphate dispersion.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8024465 | 1980-07-25 |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2080835A GB2080835A (en) | 1982-02-10 |
GB2080835B true GB2080835B (en) | 1984-08-30 |
Family
ID=10515046
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8118780A Expired GB2080835B (en) | 1980-07-25 | 1981-06-18 | Prevention of sludge in phosphating baths |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0045110B1 (en) |
JP (1) | JPS5751266A (en) |
AT (1) | ATE9823T1 (en) |
DE (1) | DE3166602D1 (en) |
ES (1) | ES8300874A1 (en) |
GB (1) | GB2080835B (en) |
IT (1) | IT1167480B (en) |
PT (1) | PT73426B (en) |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3244715A1 (en) * | 1982-12-03 | 1984-06-07 | Gerhard Collardin GmbH, 5000 Köln | METHOD FOR PHOSPHATING METAL SURFACES, AND BATH SOLUTIONS SUITABLE FOR THIS |
JPS6081850A (en) * | 1983-10-11 | 1985-05-09 | Nec Kansai Ltd | Manufacture of semiconductor device |
DE3407513A1 (en) * | 1984-03-01 | 1985-09-05 | Gerhard Collardin GmbH, 5000 Köln | METHOD FOR ZINC-CALCIUM PHOSPHATION OF METAL SURFACES AT LOW TREATMENT TEMPERATURE |
DE3636390A1 (en) * | 1986-10-25 | 1988-04-28 | Metallgesellschaft Ag | METHOD FOR PRODUCING PHOSPHATE COATINGS ON METALS |
JPS63270478A (en) * | 1986-12-09 | 1988-11-08 | Nippon Denso Co Ltd | Phosphating method |
DE3712339A1 (en) * | 1987-04-11 | 1988-10-20 | Metallgesellschaft Ag | METHOD FOR PHOSPHATIZING BEFORE ELECTROPLATING |
US5236565A (en) * | 1987-04-11 | 1993-08-17 | Metallgesellschaft Aktiengesellschaft | Process of phosphating before electroimmersion painting |
JPH01108754A (en) * | 1987-10-21 | 1989-04-26 | Toshiba Corp | Lead frame for semiconductor device |
DE3742634A1 (en) * | 1987-12-16 | 1989-06-29 | Collardin Gmbh Gerhard | METHOD FOR THE COLLIGHTING OF PHOSPHATING BAEDERS AND DEVICE FOR THIS METHOD |
DE3800835A1 (en) * | 1988-01-14 | 1989-07-27 | Henkel Kgaa | METHOD FOR PHOSPHATING METAL SURFACES |
EP0327153B1 (en) * | 1988-02-03 | 1993-08-04 | Metallgesellschaft Ag | Process for applying phosphate coatings to metals |
JPH02101174A (en) * | 1988-10-06 | 1990-04-12 | Nippon Paint Co Ltd | Treatment with zinc phosphate for cold working |
DE3840668A1 (en) * | 1988-12-02 | 1990-06-07 | Metallgesellschaft Ag | METHOD FOR PHOSPHATING METAL SURFACES |
JPH0375379A (en) * | 1989-05-15 | 1991-03-29 | Nippon Paint Co Ltd | Coated product, production thereof, concentrated phosphating agent and concentrated treating agent for replenishment |
DE4306446A1 (en) * | 1993-03-02 | 1994-09-08 | Metallgesellschaft Ag | Procedures to facilitate cold forming |
DE19634685A1 (en) * | 1996-08-28 | 1998-03-05 | Metallgesellschaft Ag | Aqueous solution and process for phosphating metallic surfaces |
US5954892A (en) * | 1998-03-02 | 1999-09-21 | Bulk Chemicals, Inc. | Method and composition for producing zinc phosphate coatings on metal surfaces |
US20050205166A1 (en) | 2002-07-10 | 2005-09-22 | Jurgen Specht | Method for coating metallic surfaces |
DE10320313B4 (en) * | 2003-05-06 | 2005-08-11 | Chemetall Gmbh | A method of coating metallic bodies with a phosphating solution, phosphating solution and the use of the coated article |
CN101665936B (en) * | 2009-09-27 | 2012-11-28 | 大连三达奥克化学股份有限公司 | Normal-temperature phosphating agent for pre-processing before spray-coating of steel plate workpiece and preparation method thereof |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5241735B2 (en) * | 1972-04-27 | 1977-10-20 | ||
DE2540684A1 (en) * | 1975-09-12 | 1977-03-17 | Metallgesellschaft Ag | PROCESS FOR PRODUCING PHOSPHATE COATINGS ON METAL SURFACES |
DE2540685C2 (en) * | 1975-09-12 | 1985-06-27 | Metallgesellschaft Ag, 6000 Frankfurt | Process for the production of phosphate coatings |
-
1981
- 1981-06-18 GB GB8118780A patent/GB2080835B/en not_active Expired
- 1981-07-15 JP JP56111535A patent/JPS5751266A/en active Pending
- 1981-07-21 DE DE8181200830T patent/DE3166602D1/en not_active Expired
- 1981-07-21 EP EP81200830A patent/EP0045110B1/en not_active Expired
- 1981-07-21 AT AT81200830T patent/ATE9823T1/en not_active IP Right Cessation
- 1981-07-24 IT IT23121/81A patent/IT1167480B/en active
- 1981-07-24 PT PT73426A patent/PT73426B/en unknown
- 1981-07-24 ES ES504609A patent/ES8300874A1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
PT73426B (en) | 1982-08-09 |
DE3166602D1 (en) | 1984-11-15 |
ES504609A0 (en) | 1982-11-16 |
ES8300874A1 (en) | 1982-11-16 |
ATE9823T1 (en) | 1984-10-15 |
EP0045110A1 (en) | 1982-02-03 |
GB2080835A (en) | 1982-02-10 |
PT73426A (en) | 1981-08-01 |
IT1167480B (en) | 1987-05-13 |
JPS5751266A (en) | 1982-03-26 |
IT8123121A0 (en) | 1981-07-24 |
EP0045110B1 (en) | 1984-10-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
PE20 | Patent expired after termination of 20 years |
Effective date: 20010617 |