Additive-assisted, cerium-based, corrosion-resistant e-coating
AssigneeThe Curators of the University of Missouri
InventorsJames O. Stoffer, Thomas J. O'Keefe, Eric L. Morris, Xuan Lin, Scott A. Hayes, Pu Yu
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Abstract
Corrosion resistance of metallic components such as stainless steel components of vehicles, and especially aluminum-based components of aircraft, is enhanced by application of an e-coat paint or primer which is enhanced by incorporation of cerium ions into the e-coat electrolytic bath. The resulting overall coating includes a cerium-based layer under a cerium-enhanced e-coat paint or primer layer.
Claims11
A process for enhancing the corrosion resistance of a metallic component manufactured from a material selected from the group consisting of aluminum and aluminum alloy, the process comprising;
- immersing an anode and the metallic component as a cathode in an electrolyte, wherein the electrolyte has a pH in the range of about 5 to about 8 and consists essentially of:
- between about 0.05 wt % and about 10 wt % of a cerium salt;
- an e-coat resin;
- an e-coat paste;
- and
- deionized water;
- and
- passing an electrical current through the electrolyte to facilitate deposition of a cerium-based coating and paint on said metallic component.
A process for enhancing the corrosion resistance of a metallic component manufactured from a material selected from the group consisting of aluminum and aluminum alloy, the process comprising;
- immersing the metallic component in an alkaline cleaning solution;
- deoxidizing the metallic component by immersion in an acidic deoxidation solution;
- immersing an anode and the metallic component as a cathode in an electrolyte, wherein the electrolyte has a pH in the range of about 5 to about 8 and consists essentially of;
- between about 0.05 wt % and about 10 wt % of a cerium salt;
- an e-coat resin;
- an e-coat paste;
- and
- deionized water;
- passing an electrical current through the electrolyte to facilitate deposition of a coating comprising a cerium-based layer and a paint layer onto said metallic component;
- and
- curing the coating by heating the component at a temperature between about 100° C. and about 210° C.
Dependencies are inferred from the claim text.