EP0127204A1 - Procédé de phosphatation de métaux composites - Google Patents

Procédé de phosphatation de métaux composites Download PDF

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Publication number
EP0127204A1
EP0127204A1 EP84200398A EP84200398A EP0127204A1 EP 0127204 A1 EP0127204 A1 EP 0127204A1 EP 84200398 A EP84200398 A EP 84200398A EP 84200398 A EP84200398 A EP 84200398A EP 0127204 A1 EP0127204 A1 EP 0127204A1
Authority
EP
European Patent Office
Prior art keywords
phosphating
phosphate
composite metals
zinc
immersion
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
Application number
EP84200398A
Other languages
German (de)
English (en)
Other versions
EP0127204B1 (fr
Inventor
Peter Jörns
Norbert Meyer
Werner Dr. Rausch
Josef Rothkegel
Gunther Luckhardt
Gudrun Volling
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GEA Group AG
Continentale Parker Ste
Continentale Parker SA
Original Assignee
Metallgesellschaft AG
Continentale Parker Ste
Continentale Parker SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Metallgesellschaft AG, Continentale Parker Ste, Continentale Parker SA filed Critical Metallgesellschaft AG
Publication of EP0127204A1 publication Critical patent/EP0127204A1/fr
Application granted granted Critical
Publication of EP0127204B1 publication Critical patent/EP0127204B1/fr
Expired legal-status Critical Current

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
    • C23C22/73—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 characterised by the process

Definitions

  • the invention relates to a method for phosphating steel and zinc surfaces having composite metals with cavities using phosphating solutions based on zinc phosphate in diving.
  • composite metals In industrial series production, surface-coated, in particular galvanized, steel sheets, so-called composite metals, are becoming increasingly important. Composite metals of this type are obtained by joining steel sheets and galvanized steel sheets and by partially galvanizing steel sheets. Similarly alone steel or Z inkober lake having parts with a phosphating solutions based on zinc phosphate for improving the corrosion protection and the paint adhesion is prior to painting, in particular electro-dip coating, is required.
  • the special feature of the phosphating of zinc UNU S tahlober schizophrenia having composite metals is that upon contact with the phosphating solution, especially in the immersion treatment, forms an electrochemical element with the zinc surface as the anode and the steel surface as the cathode.
  • the cathodic current density on the steel surface is so great that the phosphating process is impaired (W. Rausch, "Chemical surface treatment of galvanized and zinc dust-coated steel for cathodic electrocoating" Industrie Lackier congress 49 (1981), page 413ff).
  • Spray and spray / immersion process prepare an electrochemical e lemen- tes fewer difficulties because of the only imperfect education.
  • the abovementioned stripe generally does not arise, but the entire phosphate layer is frequently streaked and adversely affects the paint structure subsequently applied.
  • phosphating solutions containing 0.5 to 1.5 g / 1 zinc, 5 to 30 g / 1 phosphate ions, 0.6. Contain up to 3 g / 1 manganese ions and conventional accelerators, first in dipping and then in spraying (EP-OS 60 716).
  • the immersion treatment should be at least 15 s, advantageously 0.5 to 2 min, the spray treatment at least 2 s, advantageously 5 to 45 s.
  • This method also does not satisfactorily phosphate composite metals.
  • the object of the invention is to provide a method for phosphating steel and zinc surfaces with composite metals with cavities, which does not have the disadvantages of the aforementioned methods, but - without additional procedural effort - leads to a perfect closed phosphate layer.
  • the object is achieved by designing the method of the type mentioned at the outset in accordance with the invention such that the composite metals for initiating the formation of the phosphate layer are pre-immersed for a maximum of 30 s in a phosphating solution based on zinc phosphate and then fed to the zone of the actual immersion phosphating.
  • the composite metals can with a phosphating solution in which the weight ratio of Zn to P 2 0 5 is set to 1: (8 to 85), or with a phosphating solution in which the weight ratio of Zn to P 2 0 5 to 1: ( 0.3 to 7) is set.
  • 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, whereby the best protective properties are achieved in connection with the cathodic electrocoating.
  • phosphating processes result, which are characterized by a higher phosphating speed in comparison to the low zinc processes.
  • the phosphate layers they produce have good properties for a wide range of applications in the areas of corrosion protection and non-cutting cold forming.
  • aqueous acid solutions based on zinc phosphate zinc primary phosphate and a certain concentration adkon- to the respective B, application type and bath temperature adjusted amount of free acid.
  • 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.
  • cations known in phosphating technology for example Ni, Co, Cu, Mn, Ca, Mg, Fe, Na, K, Li, NH 4 and others.
  • further anions different from phosphate for example NO 3 , C10 3 , C1, S0 4 , F, BF 4 , SiF 6 , citrate, tartrate, etc., may be necessary or desirable .
  • the contact time for the phosphating solution used in the final immersion treatment is usually between 1 and 10 minutes.
  • the temperature of the phosphating solution is approximately 30 to 60 ° C. The lower the temperature, the longer the contact time.
  • An advantageous embodiment of the invention consists of spraying the composite metals with phosphating solution based on zinc phosphate during the supply to the immersion phosphating zone and further adjusting the supply to the immersion phosphating zone and thus the spraying treatment to a maximum of 30 s.
  • the measures customary in connection with phosphating processes can also be used in the present process. These are in particular degreasing and rust removal, pre-rinsing to activate the formation of the phosphate layer and after-treatment with rinsing solutions based on Cr (VI) and / or Cr (III) etc. or with impregnating agents such as rust protection oils, waxes and synthetic resins.

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)
EP84200398A 1983-04-26 1984-03-20 Procédé de phosphatation de métaux composites Expired EP0127204B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3315086 1983-04-26
DE19833315086 DE3315086A1 (de) 1983-04-26 1983-04-26 Verfahren zum phosphatieren von verbundmetallen

Publications (2)

Publication Number Publication Date
EP0127204A1 true EP0127204A1 (fr) 1984-12-05
EP0127204B1 EP0127204B1 (fr) 1988-01-13

Family

ID=6197396

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84200398A Expired EP0127204B1 (fr) 1983-04-26 1984-03-20 Procédé de phosphatation de métaux composites

Country Status (12)

Country Link
US (1) US4559087A (fr)
EP (1) EP0127204B1 (fr)
JP (1) JPS59205482A (fr)
AU (1) AU566551B2 (fr)
BR (1) BR8401938A (fr)
CA (1) CA1225310A (fr)
DE (2) DE3315086A1 (fr)
ES (1) ES8501450A1 (fr)
GB (1) GB2138844B (fr)
NZ (1) NZ207947A (fr)
PT (1) PT78409B (fr)
ZA (1) ZA843104B (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5268041A (en) * 1990-04-27 1993-12-07 Metallgesellschaft Ag Process for phosphating metal surfaces
EP0653502A3 (fr) * 1993-11-11 1995-08-09 Nihon Parkerizing Article composite d'acier plaqué d'un métal contenant du zinc et procédé de production.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR52942E (fr) * 1942-05-05 1945-08-24 Metallgesellschaft Ag Procédé d'obtention de revêtements de phosphates sur les métaux
FR2026749A1 (fr) * 1968-12-20 1970-09-18 Hooker Chemical Corp

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2552874A (en) * 1950-05-01 1951-05-15 American Chem Paint Co Method of phosphatizing ferriferous surfaces
BE635605A (fr) * 1962-08-01
GB1084017A (en) * 1963-09-30 1967-09-20 Jawata Iron & Steel Co Ltd Pretreating process for phosphate-treating steel sheets or plated steel sheets
ZA722987B (en) * 1971-05-10 1973-02-28 Craig S Investments Pty Ltd Rust proofing process
DE2207047A1 (de) * 1972-02-15 1973-08-30 Metallgesellschaft Ag Verfahren zur vorbereitung von stahlwerkstuecken fuer die spanlose kaltverformung
SE406940B (sv) * 1974-04-13 1979-03-05 Collardin Gmbh Gerhard Forfarande for framstellning av fosfatbeleggningar med sprutningsmetoden pa jern och stal
JPS5811513B2 (ja) * 1979-02-13 1983-03-03 日本ペイント株式会社 金属表面の保護方法
JPS57152472A (en) * 1981-03-16 1982-09-20 Nippon Paint Co Ltd Phosphating method for metallic surface for cation type electrodeposition painting
US4400416A (en) * 1981-05-19 1983-08-23 Toyota Jidosha Kogyo Kabushiki Kaisha Method of surface treatment and an apparatus used in said surface treatment

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR52942E (fr) * 1942-05-05 1945-08-24 Metallgesellschaft Ag Procédé d'obtention de revêtements de phosphates sur les métaux
FR2026749A1 (fr) * 1968-12-20 1970-09-18 Hooker Chemical Corp

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS, Band 89, Nr. 4, 24. Juli 1978, Seite 279, rechte Spalte, Nr. 28870v, Columbus, Ohio, USA; & JP-A-52 119 435 (NIHON PARKERIZING CO., LTD.) *
CHEMICAL ABSTRACTS, Band 96, Nr. 16, 19. April 1982, Seite 319, linke Spalte, Nr. 127688r, Columbus, Ohio, USA; & JP-A-56 119 780 (NISSHIN STEEL CO., LTD.) 19.09.1981 *

Also Published As

Publication number Publication date
ES531203A0 (es) 1984-12-01
AU566551B2 (en) 1987-10-22
BR8401938A (pt) 1984-12-04
GB8410726D0 (en) 1984-05-31
GB2138844B (en) 1986-06-18
PT78409A (fr) 1984-05-01
NZ207947A (en) 1987-09-30
GB2138844A (en) 1984-10-31
DE3315086A1 (de) 1984-10-31
CA1225310A (fr) 1987-08-11
JPS59205482A (ja) 1984-11-21
ES8501450A1 (es) 1984-12-01
EP0127204B1 (fr) 1988-01-13
US4559087A (en) 1985-12-17
DE3468702D1 (en) 1988-02-18
ZA843104B (en) 1984-11-28
PT78409B (fr) 1986-05-27
AU2728084A (en) 1984-11-01

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