EP0127204B1 - Procédé de phosphatation de métaux composites - Google Patents

Procédé de phosphatation de métaux composites Download PDF

Info

Publication number
EP0127204B1
EP0127204B1 EP84200398A EP84200398A EP0127204B1 EP 0127204 B1 EP0127204 B1 EP 0127204B1 EP 84200398 A EP84200398 A EP 84200398A EP 84200398 A EP84200398 A EP 84200398A EP 0127204 B1 EP0127204 B1 EP 0127204B1
Authority
EP
European Patent Office
Prior art keywords
phosphating
phosphate
zinc
steel sheets
composite metals
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
Application number
EP84200398A
Other languages
German (de)
English (en)
Other versions
EP0127204A1 (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 objects with cavities, which have been obtained by joining steel sheets and galvanized steel sheets or by partially galvanizing steel sheets (composite metals), 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. Similar to parts that only have steel or zinc surfaces, phosphating with solutions based on zinc phosphate is required before painting, especially electrocoating, to improve corrosion protection and paint adhesion.
  • the formation of the phosphate layer is disturbed insofar as, depending on the phosphating process, an approximately 5 to 10 mm wide strip is formed on the steel side which bears a highly translucent, only imperfectly formed phosphate layer.
  • Spraying and spraying / immersion processes cause less difficulties because of the imperfect formation of an electrochemical element.
  • the abovementioned stripe generally does not occur, but the entire phosphate layer is often streaked and adversely affects the paint structure subsequently applied.
  • phosphating solutions containing 0.5 to 1.5 g / l zinc, 5 to 30 g / l phosphate ions, 0.6 to 3 g / l manganese ions and conventional accelerators. to be treated first in diving and then in spraying (EP-OS 60 716).
  • the immersion treatment should be at least 15 s, expediently 0.5 to 2 min, and the spray treatment at least 2 s, expediently 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 objects with cavities, which have been obtained by joining steel sheets and galvanized steel sheets or by partial galvanizing of steel sheets (composite metals), 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 in such a way that the objects for initiating the formation of the phosphate layer are pre-immersed in a phosphating solution based on zinc phosphate for a maximum of 30 s and then fed to the zone of the actual immersion phosphating.
  • JP-A-81 119 780 It is known from JP-A-81 119 780 to pretreat cold-rolled or galvanized steel sheets with the same type of phosphating solution before the usual phosphating. However, this is not a process for phosphating composite metals, i.e. of objects that have both free steel and free zinc surfaces.
  • any phosphating solutions based on zinc phosphate can be used to carry out the phosphating. You can belong to the so-called low zinc as well as the normal zinc technology. That is, 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 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 bath concentration, type of application and bath temperature. Depending on the process conditions, the pH of the baths is approximately between 2.0. and 3.9.
  • the baths can also known in the phosphating technology other cations, for. B. Ni, Co, Cu, Mn, Ca, Mg, Fe, Na, K, Li, NH4, etc. included.
  • the use of other, different from phosphate anions, z. B. N0 3 , C10 3 , Cl, 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 objects (composite metals) with phosphating solution based on zinc phosphate during the feed to the immersion phosphating zone, and further adjusting the supply to the immersion phosphating zone and thus the spray treatment to a maximum of 30 s.
  • This procedure has the advantage that fresh phosphating solution is available during the transfer of the metal surface into the final immersion treatment in order to form a constant liquid film on the metal surface. It is thus avoided that liquid films of different thicknesses are present on the metal surface as the liquid runs off.
  • the advantage of the aforementioned measure is particularly evident in the formation of uniform phosphate layers.
  • 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.
  • the phosphate layer formation is flawless both in the vicinity of the zinc surface and on the entire steel surface.
  • the phosphate layer on the steel surface remains closed after prolonged diving, but it is incomplete and translucent in the area of action of the zinc surface.

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)

Claims (3)

1. Procédé pour la phosphatation d'objets, comportant des espaces vides, qui ont été obtenus par assemblage de tôles d'acier et de tôles d'acier galvanisées ou par zinguage partiel de tôles d'acier (métaux composites), avec utilisation de solutions de phosphatation à base de phosphate de zinc, par immersion, caractérisé en ce que les objets sont plongés au préalable, pour commencer la formation de la couche de phosphates, pendant 30 secondes au maximum dans une solution de phosphatation à base de phosphate de zinc, et sont ensuite acheminés vers la zone de la phosphatation par immersion proprement dite.
2. Procédé selon la revendication 1, caractérisé en ce que les objets sont traités par projection, pendant l'acheminement vers la zone de la phosphatation par immersion, avec une solution de phosphatation à base de phosphate de zinc.
3. Procédé selon la revendication 2, caractérisé en ce que l'on ajuste l'acheminement vers la zone de la phosphatation par immersion, et par conséquent la durée du traitement par projection, à 30 secondes au maximum.
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 EP0127204A1 (fr) 1984-12-05
EP0127204B1 true 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) ES531203A0 (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.

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE452007A (fr) * 1942-05-05
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
JPS4824135B1 (fr) * 1968-12-20 1973-07-19
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

Also Published As

Publication number Publication date
ZA843104B (en) 1984-11-28
AU2728084A (en) 1984-11-01
GB8410726D0 (en) 1984-05-31
PT78409A (fr) 1984-05-01
PT78409B (fr) 1986-05-27
ES8501450A1 (es) 1984-12-01
DE3468702D1 (en) 1988-02-18
BR8401938A (pt) 1984-12-04
AU566551B2 (en) 1987-10-22
JPS59205482A (ja) 1984-11-21
EP0127204A1 (fr) 1984-12-05
ES531203A0 (es) 1984-12-01
CA1225310A (fr) 1987-08-11
NZ207947A (en) 1987-09-30
US4559087A (en) 1985-12-17
DE3315086A1 (de) 1984-10-31
GB2138844A (en) 1984-10-31
GB2138844B (en) 1986-06-18

Similar Documents

Publication Publication Date Title
DE3118375C2 (fr)
EP0312176B1 (fr) Procédé pour produire des couches de conversion
DE2428065C2 (de) Verfahren zum Versiegeln von Zinkphosphatüberzügen auf Stahlsubstraten
EP0187917B1 (fr) Procédé pour la protection anticorrosive de couches de résine déposées autophorétiquement sur surfaces métalliques
EP0056881B1 (fr) Procédé pour la phosphatation de métaux
EP0213567B1 (fr) Procédé de revêtements de phosphate
DE3650659T2 (de) Verfahren zur Phosphatierung von Metalloberflächen
EP0149720B1 (fr) Procédé de post passivation de surfaces métalliques phosphatées, utilisant des solutions contenant des cations de titane et/ou manganèse et/ou cobalt et/ou nickel et/ou cuivre
EP0161667B1 (fr) Procédé de traitement de surfaces métalliques
EP0154367B1 (fr) Procédé de phosphatation de métaux
EP0069950B1 (fr) Procédé de phosphatation de surfaces métalliques
DE69119138T2 (de) Verfahren zur Phosphatierung von Metalloberflächen
DE2739006C2 (fr)
DE3875459T2 (de) Verfahren zum phosphatieren von metalloberflaechen.
EP0039093B1 (fr) Procédé de phosphatation des surfaces de métaux et application de ce procédé
DE2932822C2 (de) Phosphat-Überzugslösung und Verfahren zum Erzeugen von Phosphatüberzügen auf Oberflächen von bearbeitetem oder verzinntem Stahl
EP0258922A1 (fr) Procédé pour produire des revêtements de phosphate et leur utilisation
EP0127204B1 (fr) Procédé de phosphatation de métaux composites
DE2715291A1 (de) Verfahren zur herstellung amorpher, leichter, festhaftender phosphatueberzuege an eisenmetalloberflaechen
DE4232292A1 (de) Verfahren zum Phosphatieren von verzinkten Stahloberflächen
EP0866888B1 (fr) Procede pour la phosphatation de surfaces metalliques
DE1696143B2 (de) Verfahren zum erzeugen von schwarzen matten oberflaechenschichten auf gegenstaenden aus eisenmetallen, cadmium, zink oder aluminium
EP0154384B1 (fr) Procédé de prétraitement de surfaces en zinc pour le laquage
DE3335009A1 (de) Verfahren zur elektrolytischen verzinkung von stahl
DE1914052B2 (de) Verfahren zur herstellung eines phosphatueberzuges auf einer sich bewegenden eisen bzw stahloberflaeche

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: 19850504

17Q First examination report despatched

Effective date: 19860625

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE FR IT NL SE

REF Corresponds to:

Ref document number: 3468702

Country of ref document: DE

Date of ref document: 19880218

ET Fr: translation filed
ITF It: translation for a ep patent filed

Owner name: STUDIO JAUMANN

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19890321

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19890331

BERE Be: lapsed

Owner name: SOC. CONTINENTALE PARKER

Effective date: 19890331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19891001

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19891130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19891201

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

EUG Se: european patent has lapsed

Ref document number: 84200398.0

Effective date: 19900125