Skip to Content
Find More Like This
Return to Search

Protective conversion coating on mixed-metal substrates and methods thereof

United States Patent

September 6, 2016
View the Complete Patent at the US Patent & Trademark Office
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.
O'Keefe; Matthew J. (Rolla, MO), Maddela; Surender (Rolla, MO)
The Curators Of The University Of Missouri (Columbia, MO)
13/ 450,667
April 19, 2012
GOVERNMENT SUPPORT This invention was made with government support under grant no. DE-EE0003583 awarded by the Department of Energy. The government has certain rights in the invention.