Protective conversion coating on mixed-metal substrates and methods thereof

O'Keefe, Matthew J.; Maddela, Surender

Title: Protective conversion coating on mixed-metal substrates and methods thereof

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Abstract

Mixed-metal automotive vehicle bodies-in-white comprising ferrous metal surfaces, zinc surfaces, aluminum alloy surfaces, and magnesium alloy surfaces are cleaned and immersed in an aqueous bath comprising an adhesion promoter and an aqueous electrocoat bath (the adhesion promoter may be in the electrocoat bath. The adhesion promoter, which may be a cerium salt, is selected to react with each metal in the body surfaces to form an oxide layer that provides corrosion resistance for the surface and adherence for the deposited polymeric paint coating. The body is cathodic in the electrocoat deposition.

Inventors:: O'Keefe, Matthew J.; Maddela, Surender

Issue Date:: 2016-09-06

Research Org.:: The Curators Of The University Of Missouri, Columbia, MO (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1321862

Patent Number(s):: 9435039

Application Number:: 13/450,667

Assignee:: The Curators Of The University Of Missouri (Columbia, MO)

Patent Classifications (CPCs):: C - CHEMISTRY C23 - COATING METALLIC MATERIAL C23C - COATING METALLIC MATERIAL

C - CHEMISTRY C23 - COATING METALLIC MATERIAL C23G - CLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS

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C - CHEMISTRY C23 - COATING METALLIC MATERIAL C23C - COATING METALLIC MATERIAL
C23C22/68 - using aqueous solutions with pH between 6 and 8

C - CHEMISTRY C23 - COATING METALLIC MATERIAL C23G - CLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
C23G3/00 - Apparatus for cleaning or pickling metallic material

C - CHEMISTRY C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES C25D - PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS
C25D13/20 - Pretreatment

C - CHEMISTRY C23 - COATING METALLIC MATERIAL C23G - CLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
C23G1/00 - Cleaning or pickling metallic material with solutions or molten salts

C - CHEMISTRY C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES C25D - PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS
C25D13/22 - Servicing or operating {apparatus or multistep processes}

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DOE Contract Number:: EE0003583

Resource Type:: Patent

Resource Relation:: Patent File Date: 2012 Apr 19

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE

Citation Formats


                    O'Keefe, Matthew J., and Maddela, Surender. Protective conversion coating on mixed-metal substrates and methods thereof.  United States: N. p., 2016. 
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                    O'Keefe, Matthew J., & Maddela, Surender. Protective conversion coating on mixed-metal substrates and methods thereof.  United States.

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                    O'Keefe, Matthew J., and Maddela, Surender. Tue .  
        "Protective conversion coating on mixed-metal substrates and methods thereof".  United States.  https://www.osti.gov/servlets/purl/1321862.

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@article{osti_1321862,

  title        = {Protective conversion coating on mixed-metal substrates and methods thereof},

  author       = {O'Keefe, Matthew J. and Maddela, Surender},

  abstractNote = {Mixed-metal automotive vehicle bodies-in-white comprising ferrous metal surfaces, zinc surfaces, aluminum alloy surfaces, and magnesium alloy surfaces are cleaned and immersed in an aqueous bath comprising an adhesion promoter and an aqueous electrocoat bath (the adhesion promoter may be in the electrocoat bath. The adhesion promoter, which may be a cerium salt, is selected to react with each metal in the body surfaces to form an oxide layer that provides corrosion resistance for the surface and adherence for the deposited polymeric paint coating. The body is cathodic in the electrocoat deposition.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2016},

  month        = {9}

}

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