Patent ID: 8475883

Claim:
An aqueous coating material for metallic substrates, comprising a water-dispersible, a water-soluble, or a water-dispersible and water-soluble polymer P comprising a polyalkyleneimine as a building block in its backbone, the polymer P comprising covalently bonded ligands A that comprise unfunctionalized or functionalized ureas or unfunctionalized or functionalized thioureas or unfunctionalized or functionalized ureas and thioureas, which form chelates with one or more metal ions released during the corrosion of the substrate, with the substrate surface, or with both of the substrate surface and the metal ions released during the corrosion of the substrate, and crosslinking functional groups B able to form covalent bonds with themselves, with further complementary functional groups B′ of the polymer P, with further functional groups B on a crosslinker V, with further functional groups B′ on a crosslinker V, or with a combination thereof, wherein the aqueous coating material further comprises a crosslinker V containing groups B, groups B′, or a combination thereof, and wherein the polymer P and the crosslinker V are crosslinkable thermally, by means of radiation, or a combination thereof, such that the aqueous coating material is capable of electroless corrosion-control coating of the metallic substrates.