EP0036689A1 - Verfahren zum Aufbringen von Phosphatüberzügen - Google Patents
Verfahren zum Aufbringen von Phosphatüberzügen Download PDFInfo
- Publication number
- EP0036689A1 EP0036689A1 EP81200285A EP81200285A EP0036689A1 EP 0036689 A1 EP0036689 A1 EP 0036689A1 EP 81200285 A EP81200285 A EP 81200285A EP 81200285 A EP81200285 A EP 81200285A EP 0036689 A1 EP0036689 A1 EP 0036689A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- phosphating solution
- weight
- contact
- brought
- metal surfaces
- 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.)
- Granted
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- 229910019142 PO4 Inorganic materials 0.000 title claims abstract description 16
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 title claims abstract description 16
- 239000010452 phosphate Substances 0.000 title claims abstract description 16
- 238000000576 coating method Methods 0.000 title claims abstract description 5
- 238000000034 method Methods 0.000 title claims description 20
- XTEGARKTQYYJKE-UHFFFAOYSA-M Chlorate Chemical compound [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 claims abstract description 19
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000011701 zinc Substances 0.000 claims abstract description 15
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 12
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052742 iron Inorganic materials 0.000 claims abstract description 6
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 6
- 239000011572 manganese Substances 0.000 claims abstract description 6
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 5
- 150000003839 salts Chemical class 0.000 claims abstract description 4
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims abstract description 3
- 235000002906 tartaric acid Nutrition 0.000 claims abstract description 3
- 239000011975 tartaric acid Substances 0.000 claims abstract description 3
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 12
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 6
- UJJUJHTVDYXQON-UHFFFAOYSA-N nitro benzenesulfonate Chemical compound [O-][N+](=O)OS(=O)(=O)C1=CC=CC=C1 UJJUJHTVDYXQON-UHFFFAOYSA-N 0.000 claims description 4
- 229940095064 tartrate Drugs 0.000 claims description 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims description 3
- 150000002500 ions Chemical class 0.000 claims description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 2
- -1 aliphatic α-hydroxy acids Chemical class 0.000 claims 1
- 229940061720 alpha hydroxy acid Drugs 0.000 claims 1
- 229910002651 NO3 Inorganic materials 0.000 abstract description 4
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 abstract description 4
- 239000002253 acid Substances 0.000 abstract description 4
- 238000005507 spraying Methods 0.000 abstract description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract 2
- 239000004411 aluminium Substances 0.000 abstract 1
- 229910052759 nickel Inorganic materials 0.000 abstract 1
- LIBWRRJGKWQFSD-UHFFFAOYSA-M sodium;2-nitrobenzenesulfonate Chemical compound [Na+].[O-][N+](=O)C1=CC=CC=C1S([O-])(=O)=O LIBWRRJGKWQFSD-UHFFFAOYSA-M 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 15
- 230000015572 biosynthetic process Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 229910015900 BF3 Inorganic materials 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- WTEOIRVLGSZEPR-UHFFFAOYSA-N boron trifluoride Chemical compound FB(F)F WTEOIRVLGSZEPR-UHFFFAOYSA-N 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- IORISFYTXJVNFE-UHFFFAOYSA-N 2,3-dinitrobenzenesulfonic acid Chemical compound OS(=O)(=O)C1=CC=CC([N+]([O-])=O)=C1[N+]([O-])=O IORISFYTXJVNFE-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000001464 adherent effect Effects 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- SXDBWCPKPHAZSM-UHFFFAOYSA-M bromate Chemical class [O-]Br(=O)=O SXDBWCPKPHAZSM-UHFFFAOYSA-M 0.000 description 1
- 150000001845 chromium compounds Chemical class 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- CPSYWNLKRDURMG-UHFFFAOYSA-L hydron;manganese(2+);phosphate Chemical compound [Mn+2].OP([O-])([O-])=O CPSYWNLKRDURMG-UHFFFAOYSA-L 0.000 description 1
- ICIWUVCWSCSTAQ-UHFFFAOYSA-N iodic acid Chemical class OI(=O)=O ICIWUVCWSCSTAQ-UHFFFAOYSA-N 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 150000002826 nitrites Chemical class 0.000 description 1
- 150000002828 nitro derivatives Chemical class 0.000 description 1
- GQPLMRYTRLFLPF-UHFFFAOYSA-N nitrous oxide Inorganic materials [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
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
- C23C22/182—Orthophosphates containing manganese cations containing also zinc cations
- C23C22/184—Orthophosphates containing manganese cations containing also zinc cations containing also nickel 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
- C23C22/18—Orthophosphates containing manganese cations
- C23C22/182—Orthophosphates containing manganese cations 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
- C23C22/34—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
- C23C22/364—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 manganese cations
Definitions
- the invention relates to a method for applying phosphate coatings on iron, zinc and / or aluminum by means of a phosphating solution containing zinc, manganese, phosphate and accelerator.
- GB-PS 983 924 a method for applying phosphate coatings on iron or zinc surfaces by spray treatment with a solution of a temperature of 38 0 C or less is known which contains zinc and manganese phosphate and an oxidizing accelerator.
- the manganese content of the solution is between 5 and 50% by weight of the zinc content.
- DE-OS 28 18 426 shows that the introduction of boron fluoride has advantages and in particular leads to the formation of satisfactory phosphate layers on aluminum or greatly improves the quality of the phosphate layers on iron surfaces.
- oxidizing accelerators for zinc and phosphate-containing phosphating solutions have been proposed in recent years. These include chlorates, nitrates, organic nitro compounds such as sodium metanitrobenzenesulfonate and dinitrobenzenesulfonate, hydrogen peroxide, nitrites, bromates and iodates.
- GB-PS 15 42 222 describes the use of chlorate and nitrobenzenesulfonate as accelerators in a phosphating process using zinc and phosphate.
- the preferred accelerators in the processes according to GB-PS 983 924 or DE-OS 28 18 426 are nitrate, optionally with nitrite. Chlorate is also referred to as a possible additive.
- the object of the invention is to provide a phosphating process which leads to flawless phosphate layers on iron, zinc and / or aluminum which are firmly adhered to the substrate and which - particularly at low temperatures - runs at a high layer formation rate.
- 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 whose manganese content is 5 to 33% by weight of the zinc content and which contains chlorate and nitrobenzenesulfonate as accelerators .
- a preferred embodiment within the method according to the invention is to use a phosphating solution which contains.
- the manganese content should in particular make up 5 to 20% by weight, preferably 9 to 13% by weight, of the zinc content.
- phosphating solution which additionally up to 0.5% by weight, preferably 0.01 to 0.03% by weight of Ni ions, and / or additionally aliphatic e-hydroxy acids or their water-soluble salts, such as tartaric acid or tartrate, in amounts of up to 0.8% by weight, preferably 0.02 to 0.2% by weight (calculated as tartrate), and / or additionally simple, but in particular complex fluoride in amounts of up to 0.4% by weight, preferably 0.05 to 0.1% by weight (calculated as F) contains.
- a phosphating solution which additionally up to 0.5% by weight, preferably 0.01 to 0.03% by weight of Ni ions, and / or additionally aliphatic e-hydroxy acids or their water-soluble salts, such as tartaric acid or tartrate, in amounts of up to 0.8% by weight, preferably 0.02 to 0.2% by weight (calculated as tartrate), and / or additionally simple, but in particular complex fluoride in amounts of up to 0.4% by weight, preferably 0.05 to 0.1% by weight (
- accelerators in particular nitrate
- the amount should be less than 2.25 wt .-%. The preferred range is between 0.4 and 1.0% by weight.
- Nitrite should not be added if possible due to the inevitable formation of nitrous gases. Otherwise, other additives described in connection with the method according to GB-PS 983 924 and DE-OS 28 18 426 can be made.
- the pH of the phosphating solution should be 3.4 to 4.4 so that the process according to the invention leads to the desired phosphate layer formation in a sufficiently short time, in particular at the temperatures of 25 to 50 ° C. or particularly advantageously from 25 to 35 ° C.
- the total acid 20 and the free acid are preferably 0.8 to 1.0 points.
- the phosphating solution used in the method according to the invention can be prepared by dissolving the components in water. It is preferably obtained by diluting concentrates which contain the active components in the same ratio as in the working phosphating solution.
- the contact between the metal surface and the phosphating solution is usually effected by spraying and is about 50 to 120, preferably 80 seconds. Before this, the metal surfaces should be cleaned and rinsed in a conventional manner. After the phosphating layer formation, e.g. rinsed with a dilute aqueous solution of chromium compounds and then dried.
- a phosphating solution was prepared that contained.
- the phosphate layers produced were smooth, completely opaque and adherent.
- the sheets were then cathodically electrocoated with a varnish (ED 3002 from International Paints) and dried in an oven at 182 ° C. for 20 minutes.
- the dry film thickness of the lacquer was 18 ⁇ m.
- the sheets were then cross-cut and subjected to the salt spray test according to ASTM B 117-64 for a period of 500 hours. After the test was completed, the amount of dissolved paint was determined Adhesive tape stuck over the cross interfaces and removed again. No paint removal was observed.
- the example illustrates that the process according to the invention allows good phosphate layers to form within a short treatment time and at low treatment temperatures.
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- 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)
- Paints Or Removers (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Fertilizers (AREA)
- Materials For Medical Uses (AREA)
- Laminated Bodies (AREA)
- Catalysts (AREA)
Abstract
Description
- Die Erfindung betrifft ein Verfahren zum Aufbringen von Phosphatüberzügen auf Eisen, Zink und/oder Aluminium mittels einer Zink, Mangan, Phosphat und Beschleuniger enthaltenden Phosphatierungslösung.
- Aus der GB-PS 983 924 ist ein Verfahren zum Aufbringen von Phosphatüberzügen auf Eisen- oder Zinkoberflächen durch Spritzbehandlung mit einer Lösung einer Temperatur von 380C oder weniger bekannt, die Zink- und Manganphosphat sowie einen oxidierenden Beschleuniger enthält. Der Mangangehalt der Lösung liegt dabei zwischen 5 und 50 Gew.-% des Zinkgehaltes.
- Weiterhin geht aus der DE-OS 28 18 426 hervor, daß der Eintrag von Borfluorid Vorzüge mit sich bringt und insbesondere zur Bildung von befriedigenden Phosphatschichten auf Aluminium führt bzw. die Qualität der Phosphatschichten auf Eisenoberflächen stark verbessert.
- In den vergangenen Jahren ist eine große Zahl von oxidierenden Beschleunigern für Zink und Phosphat enthaltende Phosphatierungslösungen vorgeschlagen worden. Hierzu zählen Chlorate, Nitrate, organische Nitroverbindungen, wie Natriummetanitrobenzolsulfonat und -dinitrobenzolsulfonat, Wasserstoffperoxid, Nitrite, Bromate und Jodate.
- Die GB-PS 15 42 222 beschreibt die Verwendung von Chlorat und Nitrobenzolsulfonat als Beschleuniger bei einem mit Zink und Phosphat.arbeitenden Phosphatierungsverfahren.
- Trotz der zahlreichen Erwähnung unterschiedlicher oxidierender Beschleuniger sind die bevorzugten Beschleuniger bei den Verfahren gemäß GB-PS 983 924 bzw. gemäß DE-OS 28 18 426 Nitrat, gegebenenfalls mit Nitrit. Auch Chlorat ist als eventueller Zusatz bezeichnet.
- Bei Mischungen, die sowohl Mangan als auch Chlorat enthalten, war zu befürchten, daß sie eine unbefriedigende Lagerstabilität aufweisen würden, die deren Herstellung am Ort und zur Zeit des Verbrauches erforderlich macht. Dies würde Mischungen mit Chlorat weit weniger attraktiv machen als solche, die frei von Chlorat sind.
- Aufgabe der Erfindung ist es, ein Phosphatierverfahren bereitzustellen, das zu einwandfreien, mit dem Untergrund fest verwachsenen Phosphatschichten auf Eisen, Zink und/oder Aluminium führt und das - insbesondere auch bei niedrigen Temperaturen - mit hoher Schichtbildungsgeschwindigkeit abläuft.
- Die Aufgabe wird gelöst, indem das Verfahren der eingangs genannten Art entsprechend der Erfindung derart ausgestaltet wird, daß man die Metalloberflächen mit einer Phosphatierungslösung in Berührung bringt, deren Mangangehalt 5 bis 33 Gew.-% des Zinkgehaltes beträgt und die als Beschleuniger Chlorat und Nitrobenzolsulfonat enthält.
-
-
- Der Mangangehalt sollte insbesondere 5 bis 20 Gew.-%, vorzugsweise 9 bis 13 Gew.-%, des Zinkgehaltes ausmachen.
- Weitere vorteilhafte Ausgestaltungen bestehen darin, die Metalloberflächen mit einer Phosphatierungslösung in Berührung zu bringen, die zusätzlich
bis 0,5 Gew.-%, vorzugsweise 0,01 bis 0,03 Gew.-% Ni-Ionen, und/oder zusätzlich
aliphatische e-Hydroxysäuren bzw. deren wasserlösliche Salze, wie Weinsäure oder Tartrat, in Mengen bis 0,8 Gew.-%, vorzugsweise 0,02 bis 0,2 Gew.-% (berechnet als Tartrat), und/oder zusätzlich
einfaches, insbesondere aber komplexes Fluorid in Mengen bis 0,4 Gew.-%, vorzugsweise 0,05 bis 0,1 Gew.-% (berechnet als F)
enthält. - Für den Fall eines Fluoridzusatzes ist die Verwendung von Borfluorid - zweckmäßig als freie Säure eingebracht - besonders bevorzugt.
- Neben dem zur Erzielung einer hohen Schichtbildungsgeschwindigkeit erforderlichen Beschleunigerpaar Chlorat und Nitrobenzolsulfonat können auch noch weitere Beschleuniger, insbesondere Nitrat, Verwendung finden. Falls Nitrat eingesetzt wird, sollte dessen Menge unter 2,25 Gew.-% sein. Der bevorzugte Bereich liegt zwischen 0,4 und 1,0 Gew.-%. Nitrit sollte infolge der unvermeidlichen Bildung nitroser Gase möglichst nicht zugesetzt werden. Ansonsten können weitere, im Zusammenhang mit den Verfahren gemäß GB-PS 983 924 und DE-OS 28 18 426 beschriebene Zusätze vorgenommen werden.
- Damit das erfindungsgemäße Verfahren insbesondere bei den bevorzugt anzuwendenden Temperaturen von 25 bis 50 °C bzw. besonders vorteilhaft von 25 bis 35 C in hinreichend kurzer Zeit zur erwünschten Phosphatschichtausbildung führt, sollte der pH-Wert der Phosphatierungslösung 3,4 bis 4,4 betragen.
- Weiterhin betragen vorzugsweise die Gesamtsäure 20 und die freie Säure 0,8 bis 1,0 Punkte.
- Die beim erfindungsgemäßen Verfahren zur Anwendung kommende Phosphatierungslösung kann durch Auflösen der Komponenten in Wasser hergestellt werden. Vorzugsweise wird sie durch Verdünnen von Konzentraten, die die wirksamen Komponenten im gleichen Verhältnis wie in der arbeitenden Phosphatierungslösung enthalten, gewonnen.
- Der Kontakt zwischen Metalloberfläche und Phosphatierungslösung erfolgt üblicherweise durch Spritzen und beträgt dabei etwa 50 bis 120, vorzugsweise 80 Sekunden. Zuvor sollten die Metalloberflächen in konventioneller Weise gereinigt und gespült werden. Nach der Phosphatierungsschichtausbildung kann z.B. mit einer verdünnten wäßrigen Lösung von Chromverbindungen gespült und dann getrocknet werden.
- Die Erfindung wird anhand des Beispiels beispielsweise und näher erläutert.
-
- Stahlbleche, die zuvor mit einer alkalischen Reinigungslösung einer Gesamtalkalinität von 26 Punkten bei 35 °C während 90 Sekunden durch Spritzbehandlung gereinigt und dann mit Wasser gespült worden waren, wurden mit der vorgenannten Phosphatierungslösung 80 Sekunden bei 30 C im Spritzen behandelt. Anschließend wurde mit Wasser und mit destilliertem Wasser gespült und durch Preßluft getrocknet.
- Die erzeugten Phosphatschichten waren glatt, vollständig deckend und festhaftend.
- Die Bleche wurden dann mit einem Lack (ED 3002 der Firma International Paints) kathodisch elektrotauchlackiert und bei 1820C während 20 Minuten im Ofen getrocknet. Die Trockenfilmdicke des Lackes war 18 µm.
- Danach wurden die Bleche mit einem Kreuzschnitt versehen und dem Salzsprühtest gemäß ASTM B 117-64 während einer Zeitdauer von 500 Stunden unterworfen. Nach Abschluß des Testes wurde zur Ermittlung der Menge gelösten Lackes Klebeband über die Kreuzschnittstellen geklebt und wieder abgezogen. Es wurde keine Lackentfernung beobachtet.
- Das Beispiel veranschaulicht, daß das erfindungsgemäße Verfahren innerhalb kurzer Behandlungsdauer und bei tiefen Behandlungstemperaturen gute Phosphatschichten entstehen läßt.
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT81200285T ATE8277T1 (de) | 1980-03-21 | 1981-03-13 | Verfahren zum aufbringen von phosphatueberzuegen. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8009621 | 1980-03-21 | ||
GB8009621 | 1980-03-21 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0036689A1 true EP0036689A1 (de) | 1981-09-30 |
EP0036689B1 EP0036689B1 (de) | 1984-07-04 |
Family
ID=10512280
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP81200285A Expired EP0036689B1 (de) | 1980-03-21 | 1981-03-13 | Verfahren zum Aufbringen von Phosphatüberzügen |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0036689B1 (de) |
JP (1) | JPS56142872A (de) |
AT (1) | ATE8277T1 (de) |
BR (1) | BR8101682A (de) |
DE (1) | DE3164514D1 (de) |
ES (1) | ES501134A0 (de) |
GB (1) | GB2072225B (de) |
PH (1) | PH17558A (de) |
PT (1) | PT72709B (de) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0060716A1 (de) * | 1981-03-16 | 1982-09-22 | Nippon Paint Co., Ltd. | Phosphatierung von Metalloberflächen |
EP0106459A1 (de) * | 1982-08-24 | 1984-04-25 | HENKEL CORPORATION (a Delaware Corp.) | Phosphatierung von Metalloberflächen |
EP0111223A1 (de) * | 1982-12-03 | 1984-06-20 | Gerhard Collardin GmbH | Verfahren zur Phosphatierung von Metalloberflächen sowie hierfür geeignete Badlösungen |
EP0135622A1 (de) * | 1983-08-22 | 1985-04-03 | Nippon Paint Co., Ltd. | Phosphatierung von Metalloberflächen |
EP0269138A1 (de) * | 1986-10-25 | 1988-06-01 | Metallgesellschaft Ag | Verfahren zur Erzeugung von Phosphatüberzügen auf Metallen |
WO1997030189A1 (de) * | 1996-02-19 | 1997-08-21 | Henkel Kommanditgesellschaft Auf Aktien | Zinkphosphatierung mit geringen gehalten an nickel und/oder cobalt |
WO1998013535A1 (de) * | 1996-09-26 | 1998-04-02 | Henkel Kommanditgesellschaft Auf Aktien | Phosphatierverfahren für schnellaufende bandanlagen |
US5792283A (en) * | 1993-09-06 | 1998-08-11 | Henkel Kommanditgesellschaft Auf Aktien | Nickel-free phosphating process |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4673444A (en) * | 1981-03-16 | 1987-06-16 | Koichi Saito | Process for phosphating metal surfaces |
US6342107B1 (en) * | 1982-08-24 | 2002-01-29 | Henkel Corporation | Phosphate coatings for metal surfaces |
DE3461653D1 (en) * | 1983-03-15 | 1987-01-22 | Metallgesellschaft Ag | Preparation of iron or steel surfaces for painting |
AU605301B2 (en) * | 1983-08-23 | 1991-01-10 | Nippon Paint Co., Ltd. | Process for phosphating metal surfaces |
GB8329250D0 (en) * | 1983-11-02 | 1983-12-07 | Pyrene Chemical Services Ltd | Phosphating processes |
DE3408577A1 (de) * | 1984-03-09 | 1985-09-12 | Metallgesellschaft Ag, 6000 Frankfurt | Verfahren zur phosphatierung von metallen |
DE3537108A1 (de) * | 1985-10-18 | 1987-04-23 | Collardin Gmbh Gerhard | Verfahren zur phosphatierung elektrolytisch verzinkter metallwaren |
DE3630246A1 (de) * | 1986-09-05 | 1988-03-10 | Metallgesellschaft Ag | Verfahren zur erzeugung von phosphatueberzuegen sowie dessen anwendung |
US5200000A (en) * | 1989-01-31 | 1993-04-06 | Nihon Parkerizing Co., Ltd. | Phosphate treatment solution for composite structures and method for treatment |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT321663B (de) * | 1972-04-27 | 1975-04-10 | Metallgesellschaft Ag | Phosphatierungslösung |
AT325372B (de) * | 1972-01-10 | 1975-10-27 | Metallgesellschaft Ag | Verfahren zur phosphatierung von stahl |
DE2819912A1 (de) * | 1977-05-11 | 1978-11-23 | Nippon Paint Co Ltd | Verfahren zur phosphatierung von eisen |
DE2909698A1 (de) * | 1978-03-14 | 1979-09-27 | Centre Rech Metallurgique | Verfahren zur oberflaechenbehandlung von metallband |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52119435A (en) * | 1976-04-01 | 1977-10-06 | Nippon Packaging Kk | Phosphating process |
-
1981
- 1981-02-20 GB GB8105435A patent/GB2072225B/en not_active Expired
- 1981-03-13 DE DE8181200285T patent/DE3164514D1/de not_active Expired
- 1981-03-13 AT AT81200285T patent/ATE8277T1/de active
- 1981-03-13 EP EP81200285A patent/EP0036689B1/de not_active Expired
- 1981-03-16 PH PH25364A patent/PH17558A/en unknown
- 1981-03-19 JP JP4160881A patent/JPS56142872A/ja active Pending
- 1981-03-20 BR BR8101682A patent/BR8101682A/pt unknown
- 1981-03-20 PT PT72709A patent/PT72709B/pt unknown
- 1981-03-21 ES ES501134A patent/ES501134A0/es active Granted
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT325372B (de) * | 1972-01-10 | 1975-10-27 | Metallgesellschaft Ag | Verfahren zur phosphatierung von stahl |
AT321663B (de) * | 1972-04-27 | 1975-04-10 | Metallgesellschaft Ag | Phosphatierungslösung |
DE2819912A1 (de) * | 1977-05-11 | 1978-11-23 | Nippon Paint Co Ltd | Verfahren zur phosphatierung von eisen |
DE2909698A1 (de) * | 1978-03-14 | 1979-09-27 | Centre Rech Metallurgique | Verfahren zur oberflaechenbehandlung von metallband |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0060716A1 (de) * | 1981-03-16 | 1982-09-22 | Nippon Paint Co., Ltd. | Phosphatierung von Metalloberflächen |
EP0106459A1 (de) * | 1982-08-24 | 1984-04-25 | HENKEL CORPORATION (a Delaware Corp.) | Phosphatierung von Metalloberflächen |
EP0111223A1 (de) * | 1982-12-03 | 1984-06-20 | Gerhard Collardin GmbH | Verfahren zur Phosphatierung von Metalloberflächen sowie hierfür geeignete Badlösungen |
EP0135622A1 (de) * | 1983-08-22 | 1985-04-03 | Nippon Paint Co., Ltd. | Phosphatierung von Metalloberflächen |
EP0269138A1 (de) * | 1986-10-25 | 1988-06-01 | Metallgesellschaft Ag | Verfahren zur Erzeugung von Phosphatüberzügen auf Metallen |
GB2203453A (en) * | 1986-10-25 | 1988-10-19 | Pyrene Chemical Services Ltd | Phosphate coating solutions and processes |
GB2203453B (en) * | 1986-10-25 | 1990-12-05 | Pyrene Chemical Services Ltd | Phosphate coating solutions and processes |
US5792283A (en) * | 1993-09-06 | 1998-08-11 | Henkel Kommanditgesellschaft Auf Aktien | Nickel-free phosphating process |
WO1997030189A1 (de) * | 1996-02-19 | 1997-08-21 | Henkel Kommanditgesellschaft Auf Aktien | Zinkphosphatierung mit geringen gehalten an nickel und/oder cobalt |
WO1998013535A1 (de) * | 1996-09-26 | 1998-04-02 | Henkel Kommanditgesellschaft Auf Aktien | Phosphatierverfahren für schnellaufende bandanlagen |
Also Published As
Publication number | Publication date |
---|---|
PT72709B (en) | 1982-03-24 |
DE3164514D1 (en) | 1984-08-09 |
ES8205878A1 (es) | 1982-08-16 |
ATE8277T1 (de) | 1984-07-15 |
GB2072225A (en) | 1981-09-30 |
JPS56142872A (en) | 1981-11-07 |
ES501134A0 (es) | 1982-08-16 |
GB2072225B (en) | 1983-11-02 |
EP0036689B1 (de) | 1984-07-04 |
BR8101682A (pt) | 1981-09-22 |
PT72709A (en) | 1981-04-01 |
PH17558A (en) | 1984-09-27 |
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