An electrocoating composition and a coating formed from the composition, where the electrocoating composition comprises an epoxy-functional compound, an isocyanate-functional compound, a polyethylene wax, and aluminum oxide.
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1. A coated article comprising: a substrate; anda coating disposed on the substrate, the coating comprising a reaction product of an electrocoating composition comprising an epoxy-functional compound, an isocyanate-functional compound, a polyethylene wax, and aluminum oxide, wherein the coating has
1. A coated article comprising: a substrate; anda coating disposed on the substrate, the coating comprising a reaction product of an electrocoating composition comprising an epoxy-functional compound, an isocyanate-functional compound, a polyethylene wax, and aluminum oxide, wherein the coating has a thickness of about 7.6 μm to about 25.4 μm. 2. The coated article of claim 1, wherein the epoxy-functional compound comprises an amine-based cationic salt moiety formed from an amine compound selected from the group consisting of primary amines, secondary amines, tertiary amines, and combinations thereof. 3. The coated article of claim 1, wherein the isocyanate-functional compound comprises a blocked diisocyanate. 4. The coated article of claim 1, wherein the polyethylene wax has a weight average molecular weight ranging from about 1,000 to about 6,000. 5. The coated article of claim 4, wherein the weight average molecular weight of the polyethylene wax ranges from about 1,000 to about 4,000. 6. The coated article of claim 1, wherein the electrocoating composition further comprises a component selected from the group consisting of film-forming agents, surfactants, wetting agents, defoaming agents, rheology-modifying agents, colorants, and combinations thereof. 7. The coated article of claim 1, wherein the thickness of the coating ranges from about 7.6 micrometers to about 10.2 micrometers. 8. The coated article of claim 1, wherein the electrocoating composition is capable of forming a stable aqueous dispersion in an aqueous medium at a total solids concentration of about 20% by weight or less, based on an entire weight of the aqueous dispersion. 9. The coated article of claim 1, wherein the polyethylene wax is present in an amount ranging from about 0.1% by weight to about 5.0% by weight, based on a total solids weight of the electrocoating composition. 10. The coated article of claim 1, wherein the aluminum oxide is present in an amount ranging from about 1.0% by weight to about 10.0% by weight, based on a total solids weight of the electrocoating composition. 11. A method of forming the coated article of claim 1, the method comprising: depositing the electrocoating composition onto the substrate with a cathodic electrocoating process; andat least partially crosslinking the epoxy-functional compound and the isocyanate-functional compound. 12. The coated article of claim 1, wherein the electrocoating composition comprises: a resin part comprising the epoxy-functional compound and the isocyanate-functional compound; anda paste part comprising the polyethylene wax, aluminum oxide, a metal catalyst, and an acid configured to at least partially neutralize the epoxy-functional compound, wherein the polyethylene wax has a weight average molecular weight less than about 9000. 13. The coated article of claim 12, wherein the electrocoating composition comprises the epoxy-functional compound and the isocyanate-functional compound in a combined amount ranging from about 50% by weight to about 90% by weight, based on a total solids weight of the composition. 14. The coated article of claim 12, wherein the electrocoating composition comprises a ratio of the paste part to the resin part from about 1:2 to about 1:5. 15. The coated article of claim 12, wherein the paste part further comprises a component selected from the group consisting of film-forming agents, surfactants, wetting agents, defoaming agents, rheology-modifying agents, colorants, and combinations thereof.
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