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EP0355525B1 - Procédé pour effectuer un revêtement sur du zinc - Google Patents

Procédé pour effectuer un revêtement sur du zinc Download PDF

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Publication number
EP0355525B1
EP0355525B1 EP19890114427 EP89114427A EP0355525B1 EP 0355525 B1 EP0355525 B1 EP 0355525B1 EP 19890114427 EP19890114427 EP 19890114427 EP 89114427 A EP89114427 A EP 89114427A EP 0355525 B1 EP0355525 B1 EP 0355525B1
Authority
EP
European Patent Office
Prior art keywords
coatings
nickel
zinc
produced
ions
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 - Lifetime
Application number
EP19890114427
Other languages
German (de)
English (en)
Other versions
EP0355525A1 (fr
Inventor
Kazuhiko Nihon Parkerizing Co. Ltd. Mori
Toshi Nihon Parkerizing Co. Ltd. Miyawaki
Ishii Hitoshi
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.)
Nihon Parkerizing Co Ltd
Original Assignee
Nihon Parkerizing Co Ltd
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 Nihon Parkerizing Co Ltd filed Critical Nihon Parkerizing Co Ltd
Publication of EP0355525A1 publication Critical patent/EP0355525A1/fr
Application granted granted Critical
Publication of EP0355525B1 publication Critical patent/EP0355525B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/31—Coating with metals
    • C23C18/32—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron
    • 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
    • C23C22/78—Pretreatment of the material to be coated

Definitions

  • the invention relates to a method for producing coatings from nickel or nickel compounds on surfaces of zinc or zinc alloys by means of aqueous alkaline solutions containing nickel compounds, and to the use thereof for preparing the surfaces for phosphating.
  • the treatment liquids predominantly contain organic chelating agents as complexing agents for metals.
  • organic chelating agents due to inadequate deposition of metal or metal compounds, it is difficult to obtain coatings with a sufficiently high corrosion resistance. If the treatment is carried out at a high pH value for a longer period of time so that a sufficiently high metal deposition takes place, problems arise in that not only the adhesion of the coatings to the metal surface is low, but also a possibly subsequently applied lacquer film is of poor quality.
  • the object of the invention is to provide a method which does not have the disadvantages of the abovementioned methods and which, when treating surfaces made of zinc or zinc alloys, leads to coatings which have a sufficiently high layer weight and satisfactory adhesion to the metal surface.
  • 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 coatings are produced by means of a solution which contains at least 20 ppm of nickel2 mol ions and at least 6 times the molar amount of NH3 per mol of nickel and has a pH value less than 11.
  • the coatings of nickel or nickel compounds produced by the process according to the invention have a sufficiently high layer weight so that dissolution of zinc from the metal surface is largely suppressed in the case of subsequent treatments.
  • the concentration of nickel2+ ions in the treatment liquid is below 20 ppm, a sufficient layer weight of the coating is not reached.
  • the stoichiometric ratio of NH3 to nickel2+ ions is less than 6, similar results are observed as in the case of an insufficient Ni2+ concentration. If the concentration of Ni2+ ions and NH3 exceeds 100 g / l or 300 g / l, problems arise when using the method insofar as crystallization of nickel compounds and evaporation of ammonia cannot be avoided and therefore changes in the composition of the treatment liquid occur.
  • the coatings are produced by means of a solution which contains 5 to 50 g / l of Ni2+ ions and 10 to 100 g / l of NH3.
  • the coatings are applied by means of a solution whose temperature is in the range from room temperature to 50 ° C.
  • the treatment solution is preferably applied by dipping or spraying. A generation of the coatings by electrolytic means is not excluded.
  • the process according to the invention is particularly advantageously applicable to the pretreatment of the surfaces of zinc or zinc alloys for the subsequent phosphating.
  • the phosphate coatings formed are of high quality with regard to adhesive strength and corrosion resistance.
  • painting, in particular electro-dipping can follow.
  • the inventive method is particularly suitable for the production of black workpieces.
  • Tables 1 and 2 below contain the treatment conditions for carrying out Examples 1 to 9 and Comparative Examples 1 to 4.
  • the treatment liquid was applied in each case by immersion.
  • the treatment temperature was 40 ° C, except for Comparative Example 3, in which the temperature of the treatment liquid was 25 ° C.
  • Nickel2+ ions were added to the treatment liquid in the form of nickel sulfate in the event that the pH was adjusted with sulfuric acid or as nickel chloride when the pH was adjusted with hydrochloric acid.
  • Ammonia was introduced in the form of a 28% by weight aqueous solution. If necessary, ammonium sulfate or ammonium chloride was also added.
  • the test results show that the method according to the invention markedly improves the resistance of the treated sheets with regard to paint peeling. This is based on the excellent phosphatability of the nickel and / or nickel compound coatings produced and on the adhesion of the lacquer applied subsequently.
  • the advantage of the invention lies in particular in the fact that the excellent results are obtained with a comparatively simple treatment liquid, which is also chemically, i.e. can be achieved without the use of electricity. In particular, this ensures simple monitoring of the treatment liquid.
  • the process is also associated with low costs.

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)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Chemically Coating (AREA)
  • Electroplating And Plating Baths Therefor (AREA)

Claims (4)

1. Procédé de formation de revêtements de nickel et/ou de composés de nickel sur des surfaces de zinc ou d'alliages de zinc au moyen d'une solution aqueuse alcaline contenant des composés de nickel, caractérisé en ce qu'on forme les revêtements avec une solution qui contient au moins 20 ppm d'ions Ni²⁺ et au moins 6 fois la quantité molaire de NH³ par mole de nickel, et qui présente une valeur de pH inférieure à 11.
2. Procédé selon la revendication 1, caractérisé en ce qu'on forme les revêtements au moyen d'une solution qui contient de 5 à 50 g/dm³ d'ions Ni²⁺ et de 10 à 100 g/dm³ de NH₃.
3. Procédé selon la revendication 1 ou 2, caractérisé en ce qu'on forme les revêtements au moyen d'une solution dont la température se trouve dans la plage allant de la température ambiante à 50°C.
4. Utilisation du procédé selon les revendications 1, 2 ou 3, dans le but d'un prétraitement des surfaces de zinc ou d'alliages de zinc pour la phosphatation.
EP19890114427 1988-08-10 1989-08-04 Procédé pour effectuer un revêtement sur du zinc Expired - Lifetime EP0355525B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP199370/88 1988-08-10
JP63199370A JPH0723543B2 (ja) 1988-08-10 1988-08-10 亜鉛系めっき用表面処理液及び表面処理方法

Publications (2)

Publication Number Publication Date
EP0355525A1 EP0355525A1 (fr) 1990-02-28
EP0355525B1 true EP0355525B1 (fr) 1992-03-25

Family

ID=16406629

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890114427 Expired - Lifetime EP0355525B1 (fr) 1988-08-10 1989-08-04 Procédé pour effectuer un revêtement sur du zinc

Country Status (6)

Country Link
US (1) US4985087A (fr)
EP (1) EP0355525B1 (fr)
JP (1) JPH0723543B2 (fr)
DE (2) DE58901024D1 (fr)
ES (1) ES2032634T3 (fr)
GB (1) GB2221698B (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03226584A (ja) * 1990-01-30 1991-10-07 Nippon Parkerizing Co Ltd 亜鉛系めっき鋼板用表面処理液及び表面処理方法
RU2130977C1 (ru) * 1993-01-19 1999-05-27 Дзе Боинг Компани Способ формирования оксидного кобальтового конверсионного покрытия и водный химический раствор для получения оксидного кобальтового конверсионного покрытия
JP2000160316A (ja) 1998-11-27 2000-06-13 Isuzu Motors Ltd 自動車外内板用パネル材料の接合構造
JP2002059700A (ja) * 2000-08-22 2002-02-26 Osaka Prefecture 虹色発色加工法

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE338925A (fr) * 1926-02-10
GB512484A (en) * 1938-03-03 1939-09-18 Nino Rupp Process for plating nickel on electro-positive metals especially zinc and zinc alloys
GB1003575A (en) * 1962-04-19 1965-09-08 Sperry Gyroscope Co Ltd Chemical plating process
GB1141467A (en) * 1965-04-07 1969-01-29 Sperry Rand Ltd Manufacture of screened electrical conductors
US3444007A (en) * 1967-03-13 1969-05-13 Hooker Chemical Corp Process of forming paint-base coatings on zinc and zinc alloy surfaces
US3574664A (en) * 1967-10-26 1971-04-13 Rca Corp Room temperature electroless nickel plating bath
GB1194980A (en) * 1967-10-30 1970-06-17 Ibm Electroless Plating Bath Preparation
GB1227867A (fr) * 1968-04-26 1971-04-07
US3506383A (en) * 1968-08-29 1970-04-14 Trw Inc Low friction gear sets for pumps and motors
US3672939A (en) * 1969-06-02 1972-06-27 Ppg Industries Inc Electroless process for forming thin metal films
CH537463A (de) * 1969-06-26 1973-05-31 Electro Chem Eng Gmbh Bad zum stromlosen Vernickeln
US3929514A (en) * 1974-03-05 1975-12-30 Heatbath Corp Composition and method for forming a protective coating on a zinc metal surface
JPS51135840A (en) * 1975-05-21 1976-11-25 Nippon Packaging Kk Surface treatment process for zinc or zinc alloy
DE2538817C3 (de) * 1975-09-01 1980-11-13 Siemens Ag, 1000 Berlin Und 8000 Muenchen Bad und Verfahren zum stromlosen Vernickeln von Metall und Metallegierungen, insbesondere Aluminium und Aluminiumlegierungen
AU519486B2 (en) * 1978-01-26 1981-12-03 Commonwealth Scientific And Industrial Research Organisation Nickel on zinc solar absorber surfaces
US4278477A (en) * 1980-03-19 1981-07-14 Amchem Products, Inc. Metal treatment
JPS5745833A (en) * 1980-09-01 1982-03-16 Taeko Nakagawa Stomack camera
US4479832A (en) * 1981-06-15 1984-10-30 Bethlehem Steel Corporation Method of producing light absorptive surface on aluminum zinc alloy coated product
US4381203A (en) * 1981-11-27 1983-04-26 Amchem Products, Inc. Coating solutions for zinc surfaces
JPS61253381A (ja) * 1985-05-07 1986-11-11 Kawasaki Steel Corp 溶接性、耐食性に優れた黒色化表面処理鋼板の製造方法

Also Published As

Publication number Publication date
GB8918153D0 (en) 1989-09-20
EP0355525A1 (fr) 1990-02-28
ES2032634T3 (es) 1993-02-16
US4985087A (en) 1991-01-15
GB2221698A (en) 1990-02-14
GB2221698B (en) 1993-02-24
DE3925840A1 (de) 1990-02-15
DE58901024D1 (de) 1992-04-30
JPH0250976A (ja) 1990-02-20
JPH0723543B2 (ja) 1995-03-15

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