Corrosion prevention of cold rolled steel using water dispersible lignosulfonic acid doped polyaniline
AssigneeThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration
InventorTito Viswanathan
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Abstract
The invention provides coatings useful for preventing corrosion of metals. The coatings comprise a film-forming resin and conductive polymers comprising linearly conjugated π-systems and residues of sulfonated lignin or a sulfonated polyflavonoid or derivatives of sulfonated lignin or a sulfonated polyflavonoid. The invention also provides a latex formulation of the coatings, and articles of manufacture comprising a metal substrate and a coating in contact with the metal substrate.
Claims18
An article of manufacture comprising a metal substrate and a coating in contact with the metal substrate, wherein the coating comprises:
- (1) polyanilines;
- (2) residues of sulfonated lignin or derivatives of sulfonated lignin;
- and
- (3) a film-forming resin.
A method of protecting a metallic substrate from corrosion comprising:
- (1) contacting the substrate with a coating composition comprising:
- (a) polyanilines, (b) residues of sulfonated lignin or derivatives of sulfonated lignin;
- and (c) a film-forming resin;
- and
- (2) curing the coating composition to form a corrosion resistant coating on the substrate.
Dependencies are inferred from the claim text.