EP0249206A3 - Process for obtaining chromate coatings - Google Patents

Process for obtaining chromate coatings Download PDF

Info

Publication number
EP0249206A3
EP0249206A3 EP87108362A EP87108362A EP0249206A3 EP 0249206 A3 EP0249206 A3 EP 0249206A3 EP 87108362 A EP87108362 A EP 87108362A EP 87108362 A EP87108362 A EP 87108362A EP 0249206 A3 EP0249206 A3 EP 0249206A3
Authority
EP
European Patent Office
Prior art keywords
drying
contact
hydrazine
zinc
chromate coatings
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Withdrawn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
EP87108362A
Other languages
German (de)
French (fr)
Other versions
EP0249206A2 (en
Inventor
Kenshi Saeki
Noriaki Yoshitake
Takayuki Aoki
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 EP0249206A2 publication Critical patent/EP0249206A2/en
Publication of EP0249206A3 publication Critical patent/EP0249206A3/en
Withdrawn legal-status Critical Current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
    • C23C22/82—After-treatment
    • C23C22/83—Chemical after-treatment

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)

Abstract

Bei einem Verfahren zur Erzeugung von Chromatüb­ erzügen auf Metalloberflächen durch Applikation Chrom-VI-­ Verbindungen enthaltender Lösungen oder Dispersionen und anschließendes Auftrocknen des Flüssigkeitsfilms bringt man den durch Auftrocknen erhaltenen Überzug zwecks Ver­ besserung des Korrosionswiderstandes und der Schicht­ qualität im Kontakt mit wäßrigen Lösungen mit einer Re­ duktionsmittel enthaltenden Lösung in Kontakt. In a process for the production of chromate tubing form on metal surfaces by application of chrome VI Compounds containing solutions or dispersions and then drying the liquid film the coating obtained by drying for the purpose of ver improvement of the corrosion resistance and the layer quality in contact with aqueous solutions with a re solution containing the detergent in contact.

Besonders geeignete Reduktionsmittel sind Hydrazin, Hydroxylamin, Hydrazinphosphat etc., deren Konzentration 1 bis 100 g/l, vorzugsweise 30 bis 80 g/l, betragen sollte. Particularly suitable reducing agents are hydrazine, Hydroxylamine, hydrazine phosphate etc., their concentration 1 up to 100 g / l, preferably 30 to 80 g / l.

Das Verfahren ist mit besonderem Erfolg bei der Be­ handlung von Stahl-, Aluminium- und/oder mit Zink oder Zinklegierungen plattierten Stahloberflächen anwendbar. The process is particularly successful at Be act of steel, aluminum and / or with zinc or Zinc alloy plated steel surfaces applicable.

EP87108362A 1986-06-13 1987-06-10 Process for obtaining chromate coatings Withdrawn EP0249206A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP61136030A JPS62294184A (en) 1986-06-13 1986-06-13 Method for inhibiting dissolution of chromate film
JP136030/86 1986-06-13

Publications (2)

Publication Number Publication Date
EP0249206A2 EP0249206A2 (en) 1987-12-16
EP0249206A3 true EP0249206A3 (en) 1989-03-15

Family

ID=15165539

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87108362A Withdrawn EP0249206A3 (en) 1986-06-13 1987-06-10 Process for obtaining chromate coatings

Country Status (6)

Country Link
US (1) US4956027A (en)
EP (1) EP0249206A3 (en)
JP (1) JPS62294184A (en)
AU (1) AU595331B2 (en)
CA (1) CA1295214C (en)
DE (1) DE3719312A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0730457B2 (en) * 1988-02-18 1995-04-05 新日本製鐵株式会社 Chromate-treated plated steel sheet and its manufacturing method
JPH07100873B2 (en) * 1989-09-27 1995-11-01 日本パーカライジング株式会社 Chromate coating solution for zinc-based plated steel sheet
DE4135524C2 (en) * 1991-10-28 1995-01-26 Gc Galvano Consult Gmbh Method and means for chromating surfaces made of zinc or cadmium or alloys thereof
US6190464B1 (en) 1998-09-24 2001-02-20 Nisshin Steel Co., Ltd. Chromating solution and chromated metal sheet
WO2007095517A1 (en) * 2006-02-14 2007-08-23 Henkel Kommanditgesellschaft Auf Aktien Composition and processes of a dry-in-place trivalent chromium corrosion-resistant coating for use on metal surfaces
RU2434972C2 (en) * 2006-05-10 2011-11-27 ХЕНКЕЛЬ АГ унд Ко. КГаА. Improved composition containing trivalent chromium used in corrosion resistant coating on metal surface
US20090014094A1 (en) * 2007-07-12 2009-01-15 Joseph Kuezynski Methods for Reducing Hexavalent Chromium in Trivalent Chromate Conversion Coatings
DE102007060185A1 (en) * 2007-12-14 2009-06-18 Siemens Ag Method for coating a metallic surface, comprises subjecting a layer containing hexavalent chromium by a first solution on the metallic surface and subjecting the layer with a second solution consisting of reducing agent
KR101221841B1 (en) * 2012-08-16 2013-01-22 (주)현대산기 Board sawing machine
US10156016B2 (en) 2013-03-15 2018-12-18 Henkel Ag & Co. Kgaa Trivalent chromium-containing composition for aluminum and aluminum alloys

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2976193A (en) * 1959-08-03 1961-03-21 Purex Corp Ltd Process and compositions for producing aluminum surface conversion coatings
FR1576677A (en) * 1967-10-13 1969-08-01
US3762949A (en) * 1971-08-31 1973-10-02 Inland Steel Co Method for removing chromate stain from galvanized metal
FR2332339A1 (en) * 1975-11-24 1977-06-17 Imasa Ltd BLACK CHROMATE COATINGS PREPARED BY CONTACT WITH A SOLUTION CONTAINING SULFUR

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2768104A (en) * 1952-03-25 1956-10-23 Heintz Mfg Co Method for coating iron
US2777785A (en) * 1953-07-30 1957-01-15 Heintz Mfg Co Composition for and method of treating metals as well as the treated product
US3493441A (en) * 1967-08-25 1970-02-03 Hooker Chemical Corp Detoxification of hexavalent chromium containing coating on a metal surface
US3620777A (en) * 1968-07-24 1971-11-16 Hooker Chemical Corp Chromate chemical coating solution for zinc alloy
US3935035A (en) * 1973-06-05 1976-01-27 Nippon Steel Corporation Aqueous solution and method for surface treatment of metals
US3932198A (en) * 1974-05-24 1976-01-13 Amchem Products, Inc. Coating solution having trivalent chromium and manganese for coating metal surfaces

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2976193A (en) * 1959-08-03 1961-03-21 Purex Corp Ltd Process and compositions for producing aluminum surface conversion coatings
FR1576677A (en) * 1967-10-13 1969-08-01
US3762949A (en) * 1971-08-31 1973-10-02 Inland Steel Co Method for removing chromate stain from galvanized metal
FR2332339A1 (en) * 1975-11-24 1977-06-17 Imasa Ltd BLACK CHROMATE COATINGS PREPARED BY CONTACT WITH A SOLUTION CONTAINING SULFUR

Also Published As

Publication number Publication date
AU595331B2 (en) 1990-03-29
EP0249206A2 (en) 1987-12-16
AU7416887A (en) 1987-12-17
DE3719312A1 (en) 1987-12-17
CA1295214C (en) 1992-02-04
JPS6341985B2 (en) 1988-08-19
JPS62294184A (en) 1987-12-21
US4956027A (en) 1990-09-11

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RIN1 Information on inventor provided before grant (corrected)

Inventor name: SAEKI, KENSHI

Inventor name: YOSHITAKE, NORIAKI

Inventor name: AOKI, TAKAYUKI