Protective Conversion Coating on Mixed-Metal Substrates and Methods Thereof

Author

Matthew O'Keefe, Missouri University of Science and TechnologyFollow
Surender Maddela, Missouri University of Science and TechnologyFollow

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.

Recommended Citation

M. O'Keefe and S. Maddela, "Protective Conversion Coating on Mixed-Metal Substrates and Methods Thereof," U.S. Patents, Sep 2016.

Department(s)

Materials Science and Engineering

Comments

16 Aug 2012: Publication of US20120205011A1

Patent Application Number

US13/450,667

Patent Number

US9435039B2

Document Type

Patent

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2012 The Curators of the University of Missouri, All rights reserved.

Publication Date

06 Sep 2016