US20040011431A1 - Passivation method - Google Patents

Passivation method Download PDF

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Publication number
US20040011431A1
US20040011431A1 US10/416,087 US41608703A US2004011431A1 US 20040011431 A1 US20040011431 A1 US 20040011431A1 US 41608703 A US41608703 A US 41608703A US 2004011431 A1 US2004011431 A1 US 2004011431A1
Authority
US
United States
Prior art keywords
passivation
chrome
zinc
layer
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.)
Abandoned
Application number
US10/416,087
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English (en)
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
Assigned to WALTER HILLEBRAND GMBH & CO. GALVANOTECHNIK reassignment WALTER HILLEBRAND GMBH & CO. GALVANOTECHNIK ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HILLEBRAND, ERNST-WALTER
Publication of US20040011431A1 publication Critical patent/US20040011431A1/en
Abandoned 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
    • C23C22/05—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 refers to a method to passivate zinc and zinc alloy layers as well as cadmium and cadmium alloy layers and claims the priority of German patent application 100 55 215.3, which is referred to for purpose of disclosure.
  • chrome(VI) compounds contrasts their good anticorrosive qualities. Accordingly, it has been attempted for a longer period time to establish chrome(VI) free systems providing a sufficient corrosion resistance.
  • the invention has the object to provide both a passivation method with further improved anticorrosive protection characteristics and a respective coating system.
  • the invention is based on the finding, that turning away from the efforts of focussing on a compact conversion layer and thus aiming to produce a porous conversion layer leads to improved final products when the porosity is used for binding to at least one further layer.
  • the invention can be realized by using cobalt in a passivation solution containing chrome(III) and a weaker complexing agent—preferably a di- or tri-carbonic acid like oxalic acid.
  • cobalt concentration greater than 30 ⁇ l, preferably a concentration between 70 g/l and 100 g/l, In particular about 90 g/l, (concentrate—12%) already surprising corrosion protection values of 240 h until onset of primary corrosion according to DIN 50961 in the salt spray test according to DIN 50021 SS are achieved in production.
  • the method Is preferably carried out at temperatures up to 55° C. and pH levels of 0,5 to 5,5.
  • the passivation is carried out at pH 4.
  • Particularly good results can be achieved with a sulfate free solution. This is based on the idea that the use of sulfate leads to a disturbance of the catalytic reaction and interference with the development of an anticorrosive chrome layer.
  • the passivated layer is re-treated with an organic or inorganic coating which penetrates into the porous conversion layer.
  • an organic or inorganic coating which penetrates into the porous conversion layer.
  • a coat of AquaresTM (Enthone-OMI GmbH, Neuss) is applied to the passivation layer.
  • a particularly good corrosion control can be achieved by a double Aquares layer.
  • the Aquares layer surprisingly is no longer traceable in the REM in some variants of the invention.
  • this dry lubricant layer is applied onto 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)
US10/416,087 2000-11-07 2001-11-07 Passivation method Abandoned US20040011431A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10055215A DE10055215A1 (de) 2000-11-07 2000-11-07 Passivierungsverfahren
DE10055215.3 2000-11-07
PCT/EP2001/012866 WO2002038829A1 (de) 2000-11-07 2001-11-07 Passivierungsverfahren

Publications (1)

Publication Number Publication Date
US20040011431A1 true US20040011431A1 (en) 2004-01-22

Family

ID=7662484

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/416,087 Abandoned US20040011431A1 (en) 2000-11-07 2001-11-07 Passivation method

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 (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070004222A1 (en) * 2005-06-29 2007-01-04 Qingqiao Wei Fabrication of aligned nanowire lattices
US20090194001A1 (en) * 2006-07-10 2009-08-06 Nippon Chemical Industrial Co., Ltd. Organic acid chromium (iii) salt aqueous solution and process of producing the same
US20180138406A1 (en) * 2004-12-30 2018-05-17 Micron Technology, Inc. Dual resistive-material regions for phase change memory devices

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3332373B1 (ja) † 2001-11-30 2002-10-07 ディップソール株式会社 亜鉛及び亜鉛合金めっき上に六価クロムフリー防錆皮膜を形成するための処理溶液、六価クロムフリー防錆皮膜及びその形成方法。
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
DE102016005656A1 (de) 2016-05-11 2017-11-16 Surtec International Gmbh Konversionsschichten für metallische Oberflächen

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4349392A (en) * 1981-05-20 1982-09-14 Occidental Chemical Corporation Trivalent chromium 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
US4359347A (en) * 1981-04-16 1982-11-16 Occidental Chemical Corporation Chromium-free passivate solution and process
US4359345A (en) * 1981-04-16 1982-11-16 Occidental Chemical Corporation Trivalent chromium passivate solution and process
US4359348A (en) * 1981-06-17 1982-11-16 Occidental Chemical Corporation Stabilized trivalent chromium passivate composition and process
US4367099A (en) * 1981-06-15 1983-01-04 Occidental Chemical Corporation Trivalent chromium passivate process
US4384902A (en) * 1981-06-15 1983-05-24 Occidental Chemical Corporation Trivalent chromium passivate composition and process
US4971635A (en) * 1987-02-06 1990-11-20 Guhde Donald J Low-cure coating composition
USRE34707E (en) * 1986-06-13 1994-08-30 Dacral S.A. Anticorrosion coating composition with improved stability, and coated substrate
US5368655A (en) * 1992-10-23 1994-11-29 Alchem Corp. Process for chromating surfaces of zinc, cadmium and alloys thereof

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1228000A (en) * 1981-04-16 1987-10-13 David E. Crotty Chromium appearance passivate solution and process
DE19905134A1 (de) * 1999-02-09 2000-09-28 Hillebrand Walter Gmbh & Co Kg Passivierungsverfahren

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4359346A (en) * 1981-04-16 1982-11-16 Occidental Chemical Corporation Trivalent chromium passivate solution and process for yellow passivate film
US4359347A (en) * 1981-04-16 1982-11-16 Occidental Chemical Corporation Chromium-free passivate solution and process
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
US4367099A (en) * 1981-06-15 1983-01-04 Occidental Chemical Corporation Trivalent chromium passivate process
US4384902A (en) * 1981-06-15 1983-05-24 Occidental Chemical Corporation Trivalent chromium passivate composition and process
US4359348A (en) * 1981-06-17 1982-11-16 Occidental Chemical Corporation Stabilized trivalent chromium passivate composition and process
USRE34707E (en) * 1986-06-13 1994-08-30 Dacral S.A. Anticorrosion coating composition with improved stability, and coated substrate
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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180138406A1 (en) * 2004-12-30 2018-05-17 Micron Technology, Inc. Dual resistive-material regions for phase change memory devices
US20070004222A1 (en) * 2005-06-29 2007-01-04 Qingqiao Wei Fabrication of aligned nanowire lattices
US20080009121A1 (en) * 2005-06-29 2008-01-10 Qingqiao Wei Fabrication of Aligned Nanowire Lattices
US20090194001A1 (en) * 2006-07-10 2009-08-06 Nippon Chemical Industrial Co., Ltd. Organic acid chromium (iii) salt aqueous solution and process of producing the same

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
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
EP1346081A1 (de) 2003-09-24
CZ20031237A3 (cs) 2003-10-15

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Legal Events

Date Code Title Description
AS Assignment

Owner name: WALTER HILLEBRAND GMBH & CO. GALVANOTECHNIK, GERMA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HILLEBRAND, ERNST-WALTER;REEL/FRAME:014366/0783

Effective date: 20030527

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION