EP0087288A1 - Lösung und Verfahren zum Schwarzchromatisieren von Zink- und Cadmiumoberflächen - Google Patents

Lösung und Verfahren zum Schwarzchromatisieren von Zink- und Cadmiumoberflächen Download PDF

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Publication number
EP0087288A1
EP0087288A1 EP83300852A EP83300852A EP0087288A1 EP 0087288 A1 EP0087288 A1 EP 0087288A1 EP 83300852 A EP83300852 A EP 83300852A EP 83300852 A EP83300852 A EP 83300852A EP 0087288 A1 EP0087288 A1 EP 0087288A1
Authority
EP
European Patent Office
Prior art keywords
ions
bath
zinc
plating
chromium
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Withdrawn
Application number
EP83300852A
Other languages
English (en)
French (fr)
Inventor
Eliane Jeannier
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.)
M&T Chemicals Inc
Original Assignee
M&T Chemicals Inc
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 M&T Chemicals Inc filed Critical M&T Chemicals Inc
Publication of EP0087288A1 publication Critical patent/EP0087288A1/de
Withdrawn legal-status Critical Current

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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
    • C23C22/82—After-treatment
    • C23C22/83—Chemical after-treatment
    • 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
    • C23C22/24—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 hexavalent chromium compounds
    • C23C22/26—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 hexavalent chromium compounds containing also organic compounds
    • C23C22/27—Acids
    • 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
    • C23C22/24—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 hexavalent chromium compounds
    • C23C22/30—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 hexavalent chromium compounds containing also trivalent chromium
    • 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
    • C23C22/40—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 molybdates, tungstates or vanadates
    • C23C22/43—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 molybdates, tungstates or vanadates containing also hexavalent chromium compounds

Definitions

  • the present invention relates to new bath permitting, by chromium plating, to obtain a shiny black coating on surfaces of zinc, or zinc-or cadmium-containing alloys.
  • solutions used to this effect contain essentially chromium (for example in sodium or potassium dichromate and or chromic acid form), sulphate ions and, in some cases a metallic compound giving rise to the formation of a suitably coloured chromate deposit.
  • chromium for example in sodium or potassium dichromate and or chromic acid form
  • sulphate ions for example in sodium or potassium dichromate and or chromic acid form
  • metallic compound giving rise to the formation of a suitably coloured chromate deposit.
  • the metallic compounds that can be used, there are the silver salts (for example silver nitrate) which lead to the formation of a shiny black chromium plating film, which looks good but of which the resistance to corrosion is affected by metallic pollutions (zinc, iron, etc.).
  • silver salts for example silver nitrate
  • metallic pollutions zinc, iron, etc.
  • a chromium-plating bath which contains besides chromium (6) and sulphate ions, a copper salt and a mixture of acetic acid and formic acid. Unfortunately, when using this kind of bath, the deposit obtained is dull, this making it less interesting at the industrial level.
  • the invention further relates to the baths used in carrying out the said method.
  • molybdic ( ) ions with the copper ions, also produces according to the invention, a shiny black deposit with excellent anti-corrosion properties.
  • the simultaneous use of copper ions and molybdic ions implies that fairly large quantities of these ions are used; the best results are obtained when operating with concentrations of between 15 and 30 g/l of copper ions and between 0.15 and 5 g/l of molybdic ions ( );
  • the conditions of operation, to obtain the chromium-plating according to the invention can be the conditions conventionally used for chromium-plating zinc or cadmium surfaces. These conditions are for example:
  • the pieces to be treated according to the invention have of course a coating of black and shiny chromate which is very adherent and constitutes a good protection against corrosion.
  • a bath was prepared for this purpose containing:
  • the piece to be protected was dipped into this bath, at ambient temperature (20-27°C) with air-stirring of the bath, and for a duration of 2 minutes.
  • the resulting shiny black piece was then rinsed and dipped into a phosphating bath containing 12 g/l of sodium hexametaphosphate, for one minute at 20°C, without stirring.
  • the piece removed from the bath was then dried.
  • a bath was prepared containing:
  • the piece to be treated was dipped in this bath (at 20°C) for about 2 minutes.
  • the resulting piece once removed from the bath and after rinsing, can be given the phosphating treatment to improve the polished finish and resistance to corrosion of the protective coating.

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)
  • Electroplating And Plating Baths Therefor (AREA)
EP83300852A 1982-02-19 1983-02-18 Lösung und Verfahren zum Schwarzchromatisieren von Zink- und Cadmiumoberflächen Withdrawn EP0087288A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8202816 1982-02-19
FR8202816A FR2522023B1 (fr) 1982-02-19 1982-02-19 Bains et procedes utilisables pour realiser le chromatage de surfaces de zinc et de cadmium

Publications (1)

Publication Number Publication Date
EP0087288A1 true EP0087288A1 (de) 1983-08-31

Family

ID=9271185

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83300852A Withdrawn EP0087288A1 (de) 1982-02-19 1983-02-18 Lösung und Verfahren zum Schwarzchromatisieren von Zink- und Cadmiumoberflächen

Country Status (4)

Country Link
EP (1) EP0087288A1 (de)
JP (1) JPS58193376A (de)
FR (1) FR2522023B1 (de)
WO (1) WO1983002961A1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0264472A1 (de) * 1986-10-21 1988-04-27 Procoat, S.A. Wässrige Zusammensetzung zum Passivieren von Zink- und Kadmiumoberflächen
EP0716163A1 (de) * 1994-12-07 1996-06-12 ATOTECH Deutschland GmbH Lösung und Verfahren zum Chromatieren zur Endbehandlung von Zink, Zinklegierungen oder Cadmium
US6572756B2 (en) 1997-01-31 2003-06-03 Elisha Holding Llc Aqueous electrolytic medium
US6592738B2 (en) 1997-01-31 2003-07-15 Elisha Holding Llc Electrolytic process for treating a conductive surface and products formed thereby
US6599643B2 (en) 1997-01-31 2003-07-29 Elisha Holding Llc Energy enhanced process for treating a conductive surface and products formed thereby
WO2007144336A2 (de) * 2006-06-13 2007-12-21 Wolf-Dieter Franz Cr-vi-freie schwarzverchromung

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0730456B2 (ja) * 1988-10-05 1995-04-05 日本表面化学株式会社 亜鉛・ニッケル合金メッキに黒色クロメート皮膜を化成せしめる処理液
JPH0815584B2 (ja) * 1990-11-30 1996-02-21 日本鋼管株式会社 溶接可能な着色鋼板
JP2844953B2 (ja) * 1991-03-29 1999-01-13 日本鋼管株式会社 溶接可能な着色鋼板
JP2841912B2 (ja) * 1991-03-29 1998-12-24 日本鋼管株式会社 溶接可能な黒色鋼板
US5387473A (en) * 1992-03-31 1995-02-07 Nkk Corporation Weldable black steel sheet with low-gloss appearance

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB618667A (en) * 1945-04-14 1949-02-24 Jesse Edwin Stareck Improvements in or relating to the colouring and protection of metals and alloys
US2524577A (en) * 1948-08-10 1950-10-03 United Chromium Inc Dip process for coloring cadmium
US3097978A (en) * 1961-08-17 1963-07-16 Isaac L Newell Method of coating zinc surfaces
DD136979A1 (de) * 1978-06-07 1979-08-08 Alexander Strauch Mittel zum schwarzchromatieren von zink

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3127279A (en) * 1964-03-31 Aqueous black coating composition con-
US2302643A (en) * 1941-05-26 1942-11-17 Parker Rust Proof Co Method and composition for treating metals
SU681114A1 (ru) * 1973-12-10 1979-08-28 Ордена Трудового Красного Знамени Институт Химии И Химической Технологии Ан Литовской Сср Раствор дл черного пассивировани цинка
DE2445318C3 (de) * 1974-09-23 1979-10-18 Robert Bosch Gmbh, 7000 Stuttgart Bad zur Gelbchromatierung verzinkten Materials

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB618667A (en) * 1945-04-14 1949-02-24 Jesse Edwin Stareck Improvements in or relating to the colouring and protection of metals and alloys
US2524577A (en) * 1948-08-10 1950-10-03 United Chromium Inc Dip process for coloring cadmium
US3097978A (en) * 1961-08-17 1963-07-16 Isaac L Newell Method of coating zinc surfaces
DD136979A1 (de) * 1978-06-07 1979-08-08 Alexander Strauch Mittel zum schwarzchromatieren von zink

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS, vol. 90, no. 18, April, 1979, page 190, no. 140877z, Columbus, Ohio, US; & PL-A-083 483 (INSTYTUT MECHANIKI PRECYZYJNEJ) 30-04-1977 *
PLATING AND SURFACE FINISHING, vol. 68, no. 10, October, 1981, pages 54-56; V.G. ROZOVSKY et al.: "Corrosion resistance of black chromate conversion films on zinc" *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0264472A1 (de) * 1986-10-21 1988-04-27 Procoat, S.A. Wässrige Zusammensetzung zum Passivieren von Zink- und Kadmiumoberflächen
EP0716163A1 (de) * 1994-12-07 1996-06-12 ATOTECH Deutschland GmbH Lösung und Verfahren zum Chromatieren zur Endbehandlung von Zink, Zinklegierungen oder Cadmium
FR2727983A1 (fr) * 1994-12-07 1996-06-14 Atotech France Bain de chromatation et procede pour la finition de surfaces de zinc, d'alliage de zinc, ou de cadmium
US5876517A (en) * 1994-12-07 1999-03-02 Atotech Deutschland Gmbh Chromate-plating bath and process for finishing zinc zinc alloy or cadmium surfaces
US6572756B2 (en) 1997-01-31 2003-06-03 Elisha Holding Llc Aqueous electrolytic medium
US6592738B2 (en) 1997-01-31 2003-07-15 Elisha Holding Llc Electrolytic process for treating a conductive surface and products formed thereby
US6599643B2 (en) 1997-01-31 2003-07-29 Elisha Holding Llc Energy enhanced process for treating a conductive surface and products formed thereby
WO2007144336A2 (de) * 2006-06-13 2007-12-21 Wolf-Dieter Franz Cr-vi-freie schwarzverchromung
EP1876268A1 (de) 2006-06-13 2008-01-09 Wolf-Dieter Franz Cr-VI-freie Schwarzverchromung
WO2007144336A3 (de) * 2006-06-13 2008-02-28 Wolf-Dieter Franz Cr-vi-freie schwarzverchromung

Also Published As

Publication number Publication date
FR2522023A1 (fr) 1983-08-26
WO1983002961A1 (en) 1983-09-01
JPS58193376A (ja) 1983-11-11
FR2522023B1 (fr) 1987-08-21

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Inventor name: JEANNIER, ELIANE