EP0966737A4 - Protection contre la corrosion de l'aluminium et d'alliages d'aluminium au moyen de polyanilines emeraldine base - Google Patents

Protection contre la corrosion de l'aluminium et d'alliages d'aluminium au moyen de polyanilines emeraldine base

Info

Publication number
EP0966737A4
EP0966737A4 EP98910331A EP98910331A EP0966737A4 EP 0966737 A4 EP0966737 A4 EP 0966737A4 EP 98910331 A EP98910331 A EP 98910331A EP 98910331 A EP98910331 A EP 98910331A EP 0966737 A4 EP0966737 A4 EP 0966737A4
Authority
EP
European Patent Office
Prior art keywords
group
coating
substance
metal piece
aluminum
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Withdrawn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
EP98910331A
Other languages
German (de)
English (en)
Other versions
EP0966737A1 (fr
Inventor
Arthur J Epstein
Mats A P Fahlman
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.)
Ohio State University Research Foundation
Original Assignee
Ohio State University Research Foundation
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 Ohio State University Research Foundation filed Critical Ohio State University Research Foundation
Publication of EP0966737A1 publication Critical patent/EP0966737A1/fr
Publication of EP0966737A4 publication Critical patent/EP0966737A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08—Anti-corrosive paints
    • C09D5/082—Anti-corrosive paints characterised by the anti-corrosive pigment
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D179/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen, or carbon only, not provided for in groups C09D161/00 - C09D177/00
    • C09D179/02—Polyamines
    • 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
    • C23C22/02—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 non-aqueous solutions

Definitions

  • the present invention relates to the protection of aluminum and its alloys from corrosion.
  • EB emeraldine base polyaniline
  • containing film protects the aluminum surface it is coated on, but may also protect the
  • the present invention includes a coating composition for
  • the composition comprises
  • oligomers may be trimers, tetramers,
  • emeraldine base may range from about .3 to about .75 units.
  • emeraldine base or oligomers thereof may also be provided with additional ring substituents for purposes such as providing polymer cross linking, improved or in
  • substituents may be, for example, carbonate groups, alkyl groups, epoxy groups, and
  • the coating composition also include a
  • polymers/oligomers mentioned herein may also offer corrosion protection of
  • corrosion protecting polymer/oligomer also is likely to be utilized in order to improve
  • the present invention also includes a coated metal piece which may be of
  • the coated metal piece also has on at least one such surface a coating
  • the coating may also be provided with a
  • coating sealant such as a lacquer or epoxy sealant.
  • the present invention also includes, in broadest terms, a coating composition
  • composition for protecting aluminum and alloys thereof from corrosion, the composition
  • oligomers comprising at least one substance selected from the group consisting of sulfonated polyaniline and salts and oligomers thereof.
  • oligomers may include trimers,
  • the sulfonated polyaniline coatings may also be born by resin such as acrylic
  • the sulfonated polyaniline coatings will have a degree of sulfonation
  • sulfonated polyaniline may also be provided with additional ring substituents for
  • substituents may be, for example, carbonate
  • the present invention also includes a coated metal piece comprising a metal
  • said metal piece selected from the group consisting of aluminum and alloys thereof, said metal piece
  • oligomers may be trimers
  • the coated metal piece may also have a coating sealant atop the coating, and
  • sealants may be, for instance, lacquers and epoxy sealants.
  • Figure 1 shows the schematic chemical structure of emeraldine base
  • Figure 2 shows the schematic chemical structure of sulfonated (100%)
  • polyaniline in the emeraldine base form.
  • Figure 3 shows the XPS Al 2p core level depth profile of a polished A13003
  • Figure 4 shows the XPS Al 2p core level spectra of (a) an A13O03 sample
  • Figure 5 shows the XPS Al 2p core level spectra of (a) A13003 exposed to
  • Figure 6 shows a graph of a potentiodynamic scan showing the results of a
  • the surface was polished with 600 grit emery paper and degreased
  • Figure 7 shows a graph of a potentiodynamic scan showing the results of a
  • Figure 8 shows a graph of a potentiodynamic scan showing the results of a
  • Figure 9 shows a graph of a potentiodynamic scan showing the results of a
  • Example 1 EB films were coated onto A13003 alloys and were found to reduce the
  • samples consisting of Al vapor deposited onto glass.
  • the acid used was 0.1 M HCl. After the acid exposure, the samples were
  • X-ray photoelectron spectroscopy was carried using a VG Scientific
  • depth profiling was carried out both the A13003 side and the EB side.
  • metallic Al being the dominating feature at depths of -10 nm giving an estimate of the
  • the unprotected A13003 sample (a) has a
  • top coats typically used in the paint industry to protect the primer layer An example
  • the unprotected sample has a distinct shoulder at -78 eV
  • thickness of the EB films were -20 micrometers, and -40 micrometers for the trimer
  • the potentiostat used for the potentiodynamic experiments was a Gamry Instruments model PC3 potentiostat galvanostat equipped with the CMS 100 corrosion system
  • the scanning speed for the experiments was 5 mV/s.
  • Trimer top coated A12024-T3 coupons had open circuit potentials of - -0.75 V vs
  • the aluminum alloy is ennobled in the presence of an EB or a trimer
  • top coat i.e., some form of anodic protection is taking place.
  • trimer films have throwing power, i.e., the ability to protect a metal against
  • Fig. 8 are shown the potentiodynamic scans for scribed EB and epoxy, and the
  • trimer samples was reduced by an order of magnitude compared to the epoxy- coated coupons.
  • oligomers of EB and SPAN trimers, tetramers, octamers, hexdecamers, etc.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Paints Or Removers (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)
  • Laminated Bodies (AREA)

Abstract

La présente invention concerne une composition de revêtement destinée à protéger l'aluminium et des alliages d'aluminium de la corrosion. Cette composition renferme au moins une substance choisie dans le groupe composé des polyanilines émeraldine base et des oligomères de celles-ci, ou des polyanilines sulfonées et des sels et des oligomères de celles-ci. Cette invention concerne également un métal d'aluminium ou un alliage d'aluminium sur lequel a été appliqué ledit revêtement.
EP98910331A 1997-03-11 1998-03-11 Protection contre la corrosion de l'aluminium et d'alliages d'aluminium au moyen de polyanilines emeraldine base Withdrawn EP0966737A4 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US3668597P 1997-03-11 1997-03-11
US36685P 1997-03-11
PCT/US1998/004832 WO1998040881A1 (fr) 1997-03-11 1998-03-11 Protection contre la corrosion de l'aluminium et d'alliages d'aluminium au moyen de polyanilines emeraldine base

Publications (2)

Publication Number Publication Date
EP0966737A1 EP0966737A1 (fr) 1999-12-29
EP0966737A4 true EP0966737A4 (fr) 2000-04-19

Family

ID=21890053

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98910331A Withdrawn EP0966737A4 (fr) 1997-03-11 1998-03-11 Protection contre la corrosion de l'aluminium et d'alliages d'aluminium au moyen de polyanilines emeraldine base

Country Status (5)

Country Link
EP (1) EP0966737A4 (fr)
JP (1) JP2000512344A (fr)
AU (1) AU6459598A (fr)
CA (1) CA2283926A1 (fr)
WO (1) WO1998040881A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6326441B1 (en) * 2000-01-18 2001-12-04 Council Of Scientific And Industrial Research Compensated sulphonated polyaniline and a process for the preparation thereof
CN100358964C (zh) * 2004-12-08 2008-01-02 吉林正基科技开发有限责任公司 聚苯胺防腐密封胶
US8691028B2 (en) * 2006-05-10 2014-04-08 The Boeing Company Article having a hexavalent-chromium-free, corrosion-inhibiting organic conversion coating thereon, and its preparation
JP4640399B2 (ja) * 2007-09-25 2011-03-02 トヨタ自動車株式会社 防錆処理金属基材および金属基材表面の防錆法
CN101381578B (zh) * 2008-10-17 2011-08-03 哈尔滨工程大学 一种超轻镁锂合金高效防腐蚀涂料
WO2013188496A2 (fr) * 2012-06-12 2013-12-19 Cbi Polymers, Inc. Compositions d'additif résistant à la corrosion et compositions de revêtement les employant

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993014166A1 (fr) * 1992-01-21 1993-07-22 Allied-Signal Inc. Formulations de peinture a polymeres conjugues anti-corrosion pour surfaces metalliques
US5441772A (en) * 1993-09-29 1995-08-15 Air Products And Chemicals, Inc. Protecting carbon steel from corrosion with nonconducting poly(aniline)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5208301A (en) * 1988-05-13 1993-05-04 Ohio State University Research Foundation Sulfonated polyaniline compositions, ammonium salts thereof, process for their preparation and uses thereof
US5137991A (en) * 1988-05-13 1992-08-11 The Ohio State University Research Foundation Polyaniline compositions, processes for their preparation and uses thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993014166A1 (fr) * 1992-01-21 1993-07-22 Allied-Signal Inc. Formulations de peinture a polymeres conjugues anti-corrosion pour surfaces metalliques
US5441772A (en) * 1993-09-29 1995-08-15 Air Products And Chemicals, Inc. Protecting carbon steel from corrosion with nonconducting poly(aniline)

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO9840881A1 *

Also Published As

Publication number Publication date
JP2000512344A (ja) 2000-09-19
WO1998040881A1 (fr) 1998-09-17
CA2283926A1 (fr) 1998-09-17
AU6459598A (en) 1998-09-29
EP0966737A1 (fr) 1999-12-29

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