Electrodepositable coating composition comprising silane and yttrium

1. An electrodepositable coating composition comprising (i) an electrodepositable film-forming polymer, (ii) a corrosion inhibitor, and (iii) a solution of a silane that does not contain an ethylenically unsaturated double bond.

2. The electrodepositable coating composition according to claim 1 , wherein the corrosion inhibitor comprises a rare earth metal, a lanthanide, or combinations thereof.

3. The electrodepositable coating composition according to claim 2 , wherein the corrosion inhibitor is yttrium.

4. The electrodepositable coating composition according to claim 1 , wherein the (ii) corrosion inhibitor comprises ≦5 weight % of the total resin solids of the electrodepositable coating composition.

5. The electrodepositable coating composition according to claim 1 , wherein the (iii) silane comprises ≦5 weight % of the total resin solids of the electrodepositable coating composition.

6. The electrodepositable coating composition according to claim 1 , wherein the electrodepositable coating composition further comprises a silane that contains an ethylenically unsaturated double bond.

7. The electrodepositable coating composition according to claim 1 , wherein the silane comprises a functional group, and wherein the functional group comprises amino, epoxy, thiol, or combinations thereof.

8. The electrodepositable coating composition according to claim 1 , wherein the electrodepositable coating composition further comprises bismuth, copper, zinc, silver, zirconium, or combinations thereof.

9. The electrodepositable coating composition according to claim 1 , wherein (i) the electrodepositable film-forming polymer comprises reactive functional groups and wherein the electrodepositable coating composition further comprises (iv) a crosslinking agent that is reactive with the reactive functional groups of component (i).

10. The electrodepositable coating composition according to claim 9 , wherein the electrodepositable coating composition further comprises a curing catalyst.

11. The electrodepositable coating composition according to claim 10 , wherein the curing catalyst comprises an organotin compound, bicyclic guanidine, or combinations thereof.

12. A substrate coated with the electrodepositable coating composition of claim 1 .

13. The substrate according to claim 12 , wherein said substrate is a not pretreated with a phosphate or zirconium pretreatment solution prior to coating the substrate with the electrodepositable coating composition.

14. The substrate according to claim 12 , wherein said substrate is pretreated with a phosphate or a zirconium pretreatment solution prior to coating the substrate with the electrodepositable coating composition.

15. The substrate according to claim 12 , wherein said substrate comprises steel, galvanized steel, or aluminum.

16. The electrodepositable coating composition according to claim 1 , wherein the silane is an aminosilane.

17. An electrodepositable coating composition consisting essentially of (i) an electrodepositable film-forming polymer comprising reactive functional groups, (ii) yttrium, (iii) a solution of a silane that does not contain an ethylenically unsaturated double bond; (iv) a crosslinking agent that is reactive with the reactive functional groups of the film forming polymer; and (v) a catalyst.

18. The electrodepositable coating composition according to claim 17 , wherein after application to a substrate and after curing, demonstrates a burst pressure, when subjected to the PATTI ADHESION TEST, which is at least 100 psi greater than the burst pressure of an electrodepositable coating composition comprising the film-forming polymer that does not contain (ii) yttrium and a (iii) silane.

19. The electrodepositable coating composition according to claim 17 , wherein the silane comprises a functional group, and wherein the functional group comprises amino, epoxy, thiol, or combinations thereof.

20. An electrodepositable coating composition comprising (i) an electrodepositable film-forming polymer, (ii) yttrium, and (iii) a solution of an aminosilane.

21. The electrodepositable coating composition according to claim 20 , wherein the aminosilane comprises a functional group comprising an ethylenically unsaturated double bond, hydroxyl, carbamate, epoxy, isocyanate, amine-salt, mercaptan, or combinations thereof.

22. The electrodepositable coating composition according to claim 20 , wherein after application to a substrate and after curing, demonstrates a burst pressure, when subjected to the PATTI ADHESION TEST, which is at least 100 psi greater than the burst pressure of an electrodepositable coating composition comprising the film-forming polymer that does not contain (ii) yttrium and a (iii) silane.

23. The electrodepositable coating composition according to claim 20 , wherein (i) the electrodepositable film forming polymer comprises reactive functional groups and wherein the electrodepositable coating composition further comprises (iv) a crosslinking agent that is reactive with the reactive functional groups of component (i).

24. The electrodepositable coating composition according to claim 23 , wherein the electrodepositable coating composition further comprises (v) a catalyst.

25. The electrodepositable coating composition according to claim 24 , wherein the catalyst comprises dibutyl tin oxide, bicyclic guanidine, or combinations thereof.

26. A substrate coated with the electrodepositable coating composition of claim 20 .