EP0121274A1 - Procédé de phosphatation de surfaces métalliques - Google Patents
Procédé de phosphatation de surfaces métalliques Download PDFInfo
- Publication number
- EP0121274A1 EP0121274A1 EP84200316A EP84200316A EP0121274A1 EP 0121274 A1 EP0121274 A1 EP 0121274A1 EP 84200316 A EP84200316 A EP 84200316A EP 84200316 A EP84200316 A EP 84200316A EP 0121274 A1 EP0121274 A1 EP 0121274A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- metal surfaces
- phosphating
- nitrobenzenesulfonate
- contact
- brought
- 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.)
- Withdrawn
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 17
- 239000002184 metal Substances 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims description 22
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 claims abstract description 13
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 claims abstract description 7
- 229910000165 zinc phosphate Inorganic materials 0.000 claims abstract description 7
- 238000000576 coating method Methods 0.000 claims abstract description 5
- 239000011701 zinc Substances 0.000 claims description 16
- UJJUJHTVDYXQON-UHFFFAOYSA-N nitro benzenesulfonate Chemical compound [O-][N+](=O)OS(=O)(=O)C1=CC=CC=C1 UJJUJHTVDYXQON-UHFFFAOYSA-N 0.000 claims description 15
- 229910019142 PO4 Inorganic materials 0.000 claims description 8
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 7
- 239000010452 phosphate Substances 0.000 claims description 7
- XTEGARKTQYYJKE-UHFFFAOYSA-M Chlorate Chemical compound [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 abstract description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract description 3
- 230000002378 acidificating effect Effects 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 150000002828 nitro derivatives Chemical class 0.000 abstract description 2
- 239000011248 coating agent Substances 0.000 abstract 2
- HWTDMFJYBAURQR-UHFFFAOYSA-N 80-82-0 Chemical compound OS(=O)(=O)C1=CC=CC=C1[N+]([O-])=O HWTDMFJYBAURQR-UHFFFAOYSA-N 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 19
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- 229910052725 zinc Inorganic materials 0.000 description 8
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 7
- 235000021317 phosphate Nutrition 0.000 description 7
- 238000005507 spraying Methods 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 229910002651 NO3 Inorganic materials 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000009189 diving Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- KRKNYBCHXYNGOX-UHFFFAOYSA-K Citrate Chemical compound [O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O KRKNYBCHXYNGOX-UHFFFAOYSA-K 0.000 description 1
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 1
- 229910000611 Zinc aluminium Inorganic materials 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
- 230000002730 additional effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- -1 aromatic nitro compound Chemical class 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000002826 nitrites Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 229910052827 phosphophyllite Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 229940095064 tartrate Drugs 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- C23C22/12—Orthophosphates containing zinc cations
- C23C22/13—Orthophosphates containing zinc cations containing also nitrate or nitrite 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
- C23C22/12—Orthophosphates containing zinc cations
- C23C22/14—Orthophosphates containing zinc cations containing also chlorate anions
Definitions
- the invention relates to a method for applying P HOS phatüberratn on metal surfaces by means of nitrite accelerated phosphating solutions based on zinc phosphate.
- aqueous acidic zinc phosphate solution to accelerate the film formation and oxidation of the dissolved iron in the trivalent form of nitrites, in particular A lkalinitrite to add (DE-PSs 845 135 907 966 D E-ASs 10 31 083, 12 77 645, DE-OS 17 71 769).
- the methods are widely used in practice. They are characterized by a high degree of phosphating, however, provide a layer refinement unless specific substances, such as P olyphos- phosphates (E-AS 10 62 083) are added to phosphate layers having relatively high basis weights.
- the object of the invention is to provide a method which does not have the disadvantages of the known methods and, with a high acceleration effect, provides extremely fine-grained, flexible phosphate layers with a low basis weight.
- the object is achieved by designing the method of the type mentioned at the outset in accordance with the invention in such a way that the metal surfaces are brought into contact with a phosphating solution additionally containing nitrobenzenesulfonate, the nitrobenzenesulfonate content of which is such that the resulting layer weight is less than 2 g / m 2.
- the method according to the invention is intended in particular for the treatment of iron and steel. However, it is also suitable for phosphating zinc and aluminum materials as well as steel with coatings made of zinc, zinc alloys, aluminum and aluminum alloys, which are produced using a wide variety of processes.
- the metal surfaces can be treated by spraying, flooding and also immersion. However, it is also possible with combined working methods, e.g. Splash-diving, diving-spraying, splash-diving-spraying and the like are applicable.
- the contact times for the phosphating solution with the metal surface are in the usual range and can e.g. 45 seconds to 3 minutes for spraying, 2 to 10 minutes for diving and 20 seconds of spraying and 3 minutes for diving.
- the temperatures of the phosphating solutions used in the process according to the invention are usually between 30 and 60 ° C. The lower the temperature, the longer i.a. the contact time.
- the desired layer weights can be set by suitable dosing below 2 g / m 2 .
- Layer weights of up to approximately 1 g / m 2 can be set.
- an advantageous embodiment of the invention provides the metal surface with an P hospha- t istsown be brought into contact, the Nitrobenzolsulfonatgehalt is dimensioned such that the resulting S chichtactis below 1.5 g / m 2.
- the metal surfaces it is advantageous to bring the metal surfaces into contact with a phosphating solution whose nitrobenzenesulfonate content is at least 300 mg / l.
- the contents of the individual effective bath components are within the usual limits.
- the nitrite content is preferably in the range from 10 to 300 mg / l.
- the upper limit for the content of nitrobenzenesulfonate is about 2 g / 1. Higher levels are practically associated with no additional effect.
- nitrite and nitrobenzenesulfonate accelerators are usually added to the phosphating bath in the form of the alkali salts.
- the nitrobenzenesulfonate can also be introduced as the corresponding sulfonic acid.
- aqueous acidic solutions based on zinc phosphate to be used in the context of the invention contain primary zinc phosphate and a certain amount of free acid which is matched to the respective building concentration, type of application and bath temperature.
- the pH of the baths is between 2.0 and 3.9, depending on the process conditions.
- the baths can also contain other cations known in phosphating technology, for example Ni, Co, Cu, Mn, Ca, Mg, Fe, Na, K , Li, NH 4 and others.
- other anions different from phosphate for example NO 3 , C10 3 , Cl, SO 4 , F, BF 4 , SiF 6 , citrate, tartrate, etc., may be necessary or desirable .
- the metal surfaces to be brought into contact with a phosphating solution in which the weight ratio of Zn to P 2 O 5 is set to 1: (8 to 85), or the metal surfaces with a Phos to bring phating solution in contact, in which the weight ratio of Zn to P 2 0 5 is set to 1: (0.3 to 7).
- phosphate layers with a high proportion of phosphophyllite to hopite are formed on steel. Because of their excellent corrosion protection, these coatings are particularly suitable as a preparation for painting, with the best protective properties being achieved in connection with cathodic electrocoating.
- Steel sheets were degreased in an alkaline, aqueous cleaner, rinsed with water and then treated with various phosphating solutions by spraying at 55 ° C. for 2 minutes.
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)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3311738 | 1983-03-31 | ||
| DE19833311738 DE3311738A1 (de) | 1983-03-31 | 1983-03-31 | Verfahren zur phosphatierung von metalloberflaechen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0121274A1 true EP0121274A1 (fr) | 1984-10-10 |
Family
ID=6195182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP84200316A Withdrawn EP0121274A1 (fr) | 1983-03-31 | 1984-03-06 | Procédé de phosphatation de surfaces métalliques |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP0121274A1 (fr) |
| AU (1) | AU2629184A (fr) |
| BR (1) | BR8401487A (fr) |
| CA (1) | CA1206852A (fr) |
| DE (1) | DE3311738A1 (fr) |
| ES (1) | ES8504270A1 (fr) |
| GB (1) | GB2137231B (fr) |
| PT (1) | PT78335B (fr) |
| ZA (1) | ZA842173B (fr) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0258922A1 (fr) * | 1986-09-05 | 1988-03-09 | Metallgesellschaft Ag | Procédé pour produire des revêtements de phosphate et leur utilisation |
| EP0287133A1 (fr) * | 1987-04-11 | 1988-10-19 | Metallgesellschaft Ag | Procédé de phosphatation avant la peinture électrophorétique par immersion |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3408577A1 (de) * | 1984-03-09 | 1985-09-12 | Metallgesellschaft Ag, 6000 Frankfurt | Verfahren zur phosphatierung von metallen |
| US5234509A (en) * | 1984-12-20 | 1993-08-10 | Henkel Corporation | Cold deformation process employing improved lubrication coating |
| CA1257527A (fr) * | 1984-12-20 | 1989-07-18 | Thomas W. Tull | Procede de deformation a froid avec enduction lubrifiante amelioree |
| US4595424A (en) * | 1985-08-26 | 1986-06-17 | Parker Chemical Company | Method of forming phosphate coating on zinc |
| USRE35958E (en) * | 1985-08-26 | 1998-11-17 | Henkel Corporation | Method of forming phosphate coating on zinc |
| GB8523572D0 (en) * | 1985-09-24 | 1985-10-30 | Pyrene Chemicals Services Ltd | Coating metals |
| US5236565A (en) * | 1987-04-11 | 1993-08-17 | Metallgesellschaft Aktiengesellschaft | Process of phosphating before electroimmersion painting |
| DE3871031D1 (de) * | 1987-08-19 | 1992-06-17 | Metallgesellschaft Ag | Verfahren zur phosphatierung von metallen. |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3016576A1 (de) * | 1980-04-30 | 1981-11-05 | Metallgesellschaft Ag, 6000 Frankfurt | Verfahren zur phosphatierung von metalloberflaechen sowie dessen anwendung |
| EP0069950A1 (fr) * | 1981-07-13 | 1983-01-19 | Metallgesellschaft Ag | Procédé de phosphatation de surfaces métalliques |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2884351A (en) * | 1956-01-25 | 1959-04-28 | Parker Rust Proof Co | Method of cold rolling ferrous strip stock |
| FR1258855A (fr) * | 1960-02-18 | 1961-04-21 | Parker Ste Continentale | Procédé perfectionné de phosphatation de surfaces métalliques |
| FR2110784A5 (fr) * | 1970-10-30 | 1972-06-02 | Parker Ste Continentale | |
| NL7114590A (fr) * | 1971-10-22 | 1973-04-25 | ||
| SE441105B (sv) * | 1976-04-05 | 1985-09-09 | Amchem Prod | Forfarande for framstellning av en amorf, lett, hart fastsittande fosfatbeleggning |
| GB1542222A (en) * | 1977-01-06 | 1979-03-14 | Pyrene Chemical Services Ltd | Phosphate coating compositions |
| JPS5456038A (en) * | 1977-10-12 | 1979-05-04 | Nippon Paint Co Ltd | Controlling method for acidic phosphate film forming liquid |
| DE2908376C2 (de) * | 1979-03-03 | 1985-09-26 | Akzo Gmbh, 5600 Wuppertal | Verfahren zur Herstellung einer antistatischen Teppichfaser |
-
1983
- 1983-03-31 DE DE19833311738 patent/DE3311738A1/de not_active Withdrawn
-
1984
- 1984-03-06 EP EP84200316A patent/EP0121274A1/fr not_active Withdrawn
- 1984-03-23 CA CA000450436A patent/CA1206852A/fr not_active Expired
- 1984-03-23 ZA ZA842173A patent/ZA842173B/xx unknown
- 1984-03-27 ES ES531002A patent/ES8504270A1/es not_active Expired
- 1984-03-28 GB GB08408006A patent/GB2137231B/en not_active Expired
- 1984-03-29 PT PT78335A patent/PT78335B/pt not_active IP Right Cessation
- 1984-03-30 AU AU26291/84A patent/AU2629184A/en not_active Abandoned
- 1984-03-30 BR BR8401487A patent/BR8401487A/pt unknown
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3016576A1 (de) * | 1980-04-30 | 1981-11-05 | Metallgesellschaft Ag, 6000 Frankfurt | Verfahren zur phosphatierung von metalloberflaechen sowie dessen anwendung |
| EP0069950A1 (fr) * | 1981-07-13 | 1983-01-19 | Metallgesellschaft Ag | Procédé de phosphatation de surfaces métalliques |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0258922A1 (fr) * | 1986-09-05 | 1988-03-09 | Metallgesellschaft Ag | Procédé pour produire des revêtements de phosphate et leur utilisation |
| EP0287133A1 (fr) * | 1987-04-11 | 1988-10-19 | Metallgesellschaft Ag | Procédé de phosphatation avant la peinture électrophorétique par immersion |
Also Published As
| Publication number | Publication date |
|---|---|
| ES531002A0 (es) | 1985-05-01 |
| GB8408006D0 (en) | 1984-05-10 |
| DE3311738A1 (de) | 1984-10-04 |
| GB2137231A (en) | 1984-10-03 |
| ZA842173B (en) | 1984-10-31 |
| ES8504270A1 (es) | 1985-05-01 |
| CA1206852A (fr) | 1986-07-02 |
| AU2629184A (en) | 1984-10-04 |
| GB2137231B (en) | 1986-06-18 |
| PT78335A (en) | 1984-04-01 |
| PT78335B (en) | 1986-04-30 |
| BR8401487A (pt) | 1984-11-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE3879099T2 (de) | Verfahren und zusammensetzung zur herstellung von zinkphosphatueberzuegen. | |
| DE3118375C2 (fr) | ||
| EP0056881B1 (fr) | Procédé pour la phosphatation de métaux | |
| EP0155547B1 (fr) | Procédé pour la phosphatation au zinc-calcium de surfaces métalliques à basse température de traitement | |
| EP0069950B1 (fr) | Procédé de phosphatation de surfaces métalliques | |
| EP0045110A1 (fr) | Procédé pour la production de revêtements de phosphate sur les surfaces de fer et d'acier et son usage | |
| DE3408577A1 (de) | Verfahren zur phosphatierung von metallen | |
| DE69119138T2 (de) | Verfahren zur Phosphatierung von Metalloberflächen | |
| EP0922123B1 (fr) | Solution aqueuse et procede de phosphatation de surfaces metalliques | |
| DE3902266A1 (de) | Verfahren zum aufbringen von konversionsueberzuegen | |
| EP0134895B1 (fr) | Procédé et composés pour l'application accélérée et affinée de couches de phosphate sur des surfaces métalliques | |
| EP0121274A1 (fr) | Procédé de phosphatation de surfaces métalliques | |
| EP0039093B1 (fr) | Procédé de phosphatation des surfaces de métaux et application de ce procédé | |
| DE974713C (de) | Verfahren zur Herstellung von UEberzuegen auf Metallen | |
| EP1060290B1 (fr) | Solution aqueuse et procede pour phosphater des surfaces metalliques | |
| DE853698C (de) | Verfahren zur Herstellung von Phosphatueberzuegen auf Zink | |
| DE3780078T2 (de) | Korrosionsbestaendige beschichtung. | |
| EP0215041B1 (fr) | Procede de phosphatation de surfaces metalliques | |
| EP0258922A1 (fr) | Procédé pour produire des revêtements de phosphate et leur utilisation | |
| EP0711849A1 (fr) | Procédé pour appliquer des revêtements de phosphate | |
| DE974503C (de) | Verfahren zur Herstellung von UEberzuegen auf Metallen | |
| EP0866888B1 (fr) | Procede pour la phosphatation de surfaces metalliques | |
| EP1155163B1 (fr) | Procede pour la phosphatisation de surfaces en zinc ou en aluminium | |
| DE1184590B (de) | Verfahren zum Aufbringen von Phosphatueberzuegen auf metallischen Oberflaechen | |
| DE976692C (de) | Verfahren zum Aufbringen von Oxalatueberzuegen auf Metallen |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Designated state(s): BE DE FR IT NL SE |
|
| 17P | Request for examination filed |
Effective date: 19850112 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
| 18W | Application withdrawn |
Withdrawal date: 19860409 |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: WUTTKE, WOLFGANG Inventor name: RAUSCH, WERNER, DR. Inventor name: MUELLER, GERD |