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

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.
Authors:
;
Publication Date:
OSTI Identifier:
1321862
Report Number(s):
9,435,039
13/450,667
DOE Contract Number:
EE0003583
Resource Type:
Patent
Resource Relation:
Patent File Date: 2012 Apr 19
Research Org:
The Curators Of The University Of Missouri, Columbia, MO (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE