EP1346081A1 - Passivierungsverfahren - Google Patents

Passivierungsverfahren

Info

Publication number
EP1346081A1
EP1346081A1 EP01993716A EP01993716A EP1346081A1 EP 1346081 A1 EP1346081 A1 EP 1346081A1 EP 01993716 A EP01993716 A EP 01993716A EP 01993716 A EP01993716 A EP 01993716A EP 1346081 A1 EP1346081 A1 EP 1346081A1
Authority
EP
European Patent Office
Prior art keywords
passivation
chromium
layer
concentration
passivated layer
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Withdrawn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
EP01993716A
Other languages
German (de)
English (en)
French (fr)
Inventor
Ernst Walter Hillebrand
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.)
Hillebrand Walter GmbH and Co KG
Original Assignee
Hillebrand Walter GmbH and Co KG
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 Hillebrand Walter GmbH and Co KG filed Critical Hillebrand Walter GmbH and Co KG
Publication of EP1346081A1 publication Critical patent/EP1346081A1/de
Withdrawn legal-status Critical Current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
    • C23C22/05—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
    • C23C22/48—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 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
    • C23C22/53—Treatment of zinc or alloys based thereon
    • 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
    • C23C22/46—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 oxalates
    • 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
    • C23C2222/00—Aspects relating to chemical surface treatment of metallic material by reaction of the surface with a reactive medium
    • C23C2222/10—Use of solutions containing trivalent chromium but free of hexavalent chromium

Definitions

  • the invention relates to a method for passivating zinc and zinc alloy layers and cadmium and cadmium alloy layers and claims the priority of German patent application 100 55 215.3, to which reference is made in terms of content.
  • a system with good corrosion protection properties is a galvanically applied zinc-nickel alloy, which is then chromated and can also be treated with an organic or inorganic layer. Good corrosion resistance is achieved using chromium (VI) to passivate the zinc / nickel layer.
  • VI chromium
  • the object of the present invention is to provide a method for passivation, which allows further improved corrosion protection properties, and a corresponding coating system.
  • the invention is based on the knowledge that the abandonment of the desire for a compact conversion layer, and thus the striving for a porous conversion layer, leads to improved end products if the porosity is used for the connection with at least one further layer.
  • the invention can be implemented by passivation with a chromium (III) and a less stable complexing agent - preferably a di- or tricarboxylic acid - such as oxalic acid-containing passivation solution using cobalt.
  • cobalt concentration of more than 30 g / l, preferably from 70 g / l to 100 g / l, in particular, about 90 g / l (concentrate - 12%), surprising corrosion protection values from 240 h to the first attack according to DIN 50961 im Salt spray cabinet according to DIN 50021 SS reached in production.
  • the process is preferably carried out at a temperature of up to 55 ° C. and a pH of 0.5 to 5.5.
  • the passivation is preferably carried out at pH 4. Particularly good results can be achieved with a sulfate-free solution. This is based on the knowledge that the use of sulfate leads to a disruption of the catalytic reaction and hinders the build-up of a corrosion-protecting chromium layer.
  • the passivated layer is aftertreated with an organic or inorganic coating that penetrates into the porous conversion layer.
  • An Aquares TM layer from Enthone-OMI GmbH, Neuss is preferably applied to the passivation layer. Particularly good corrosion protection can be achieved with a double Aquares layer. Surprisingly, the Aquares layer in the SEM is no longer detectable in some variants of the invention.
  • the corrosion protection properties and the chemical resistance can be further improved by a top coat containing a dry lubricant. According to the invention, this also forms a special bond with the porous conversion layer. This allows the desired friction and flow values to be achieved at the same time.
  • the combination of the dry lubricant Molykote®D-7100 from Dow Corning with the passivated zinc-nickel alloy according to the invention has surprising properties. Compared to known coating systems, this system is particularly resistant to chemicals and is insensitive to rim cleaners. It is therefore particularly suitable for wheel bolts. At the same time, the combination according to the invention is surprisingly insensitive to temperature.
  • This dry lubricant layer is preferably applied to a double Aquares layer.

Landscapes

  • 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)
  • Lubricants (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Formation Of Insulating Films (AREA)
  • Chemically Coating (AREA)
EP01993716A 2000-11-07 2001-11-07 Passivierungsverfahren Withdrawn EP1346081A1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10055215A DE10055215A1 (de) 2000-11-07 2000-11-07 Passivierungsverfahren
DE10055215 2000-11-07
PCT/EP2001/012866 WO2002038829A1 (de) 2000-11-07 2001-11-07 Passivierungsverfahren

Publications (1)

Publication Number Publication Date
EP1346081A1 true EP1346081A1 (de) 2003-09-24

Family

ID=7662484

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01993716A Withdrawn EP1346081A1 (de) 2000-11-07 2001-11-07 Passivierungsverfahren

Country Status (12)

Country Link
US (1) US20040011431A1 (cs)
EP (1) EP1346081A1 (cs)
JP (1) JP2004513240A (cs)
CN (1) CN1478155A (cs)
AU (1) AU2002221819A1 (cs)
BR (1) BR0115161A (cs)
CA (1) CA2428138A1 (cs)
CZ (1) CZ20031237A3 (cs)
DE (1) DE10055215A1 (cs)
MX (1) MXPA03004019A (cs)
SK (1) SK5442003A3 (cs)
WO (1) WO2002038829A1 (cs)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016005656A1 (de) 2016-05-11 2017-11-16 Surtec International Gmbh Konversionsschichten für metallische Oberflächen
EP1318214B2 (en) † 2001-11-30 2021-12-08 Dipsol Chemicals Co., Ltd. Processing solution for forming hexavalent chromium free and corrosion resistant conversion film on zinc or zinc alloy plating layers, hexavalent chromium free and corrosion resistant conversion film, method for forming the same

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1307323C (zh) * 2004-06-14 2007-03-28 广州市集胜化工有限公司 镀锌用三价铬彩虹色钝化剂及其制造方法
EP1677371A1 (en) * 2004-12-30 2006-07-05 STMicroelectronics S.r.l. Dual resistance heater for phase change devices and manufacturing method thereof
US7276424B2 (en) * 2005-06-29 2007-10-02 Hewlett-Packard Development Company, L.P. Fabrication of aligned nanowire lattices
JP4993959B2 (ja) * 2006-07-10 2012-08-08 日本化学工業株式会社 有機酸クロム（ｉｉｉ）水溶液及びその製造方法

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4359348A (en) * 1981-06-17 1982-11-16 Occidental Chemical Corporation Stabilized trivalent chromium passivate composition and process
US4359347A (en) * 1981-04-16 1982-11-16 Occidental Chemical Corporation Chromium-free passivate solution and process
US4359346A (en) * 1981-04-16 1982-11-16 Occidental Chemical Corporation Trivalent chromium passivate solution and process for yellow passivate film
US4359345A (en) * 1981-04-16 1982-11-16 Occidental Chemical Corporation Trivalent chromium passivate solution and process
US4349392A (en) * 1981-05-20 1982-09-14 Occidental Chemical Corporation Trivalent chromium passivate solution and process
US4384902A (en) * 1981-06-15 1983-05-24 Occidental Chemical Corporation Trivalent chromium passivate composition and process
US4367099A (en) * 1981-06-15 1983-01-04 Occidental Chemical Corporation Trivalent chromium passivate process
CA1228000A (en) * 1981-04-16 1987-10-13 David E. Crotty Chromium appearance passivate solution and process
FR2600072B1 (fr) * 1986-06-13 1988-10-21 Dacral Sa Composition de revetement anticorrosion a stabilite amelioree, et substrat revetu
US4971635A (en) * 1987-02-06 1990-11-20 Guhde Donald J Low-cure coating composition
US5368655A (en) * 1992-10-23 1994-11-29 Alchem Corp. Process for chromating surfaces of zinc, cadmium and alloys thereof
DE19905134A1 (de) * 1999-02-09 2000-09-28 Hillebrand Walter Gmbh & Co Kg Passivierungsverfahren

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0238829A1 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1318214B2 (en) † 2001-11-30 2021-12-08 Dipsol Chemicals Co., Ltd. Processing solution for forming hexavalent chromium free and corrosion resistant conversion film on zinc or zinc alloy plating layers, hexavalent chromium free and corrosion resistant conversion film, method for forming the same
DE102016005656A1 (de) 2016-05-11 2017-11-16 Surtec International Gmbh Konversionsschichten für metallische Oberflächen
WO2017194187A1 (de) 2016-05-11 2017-11-16 Surtec International Gmbh Konversionsschichten für metallische oberflächen

Also Published As

Publication number Publication date
DE10055215A1 (de) 2002-05-08
BR0115161A (pt) 2003-10-21
SK5442003A3 (en) 2003-10-07
JP2004513240A (ja) 2004-04-30
US20040011431A1 (en) 2004-01-22
CA2428138A1 (en) 2002-05-16
CN1478155A (zh) 2004-02-25
WO2002038829A1 (de) 2002-05-16
MXPA03004019A (es) 2004-02-12
AU2002221819A1 (en) 2002-05-21
CZ20031237A3 (cs) 2003-10-15

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