Electrodeposition paint composition

A cathodically depositable electrodeposition primer composition comprising:

• an aqueous binder dispersion;
• a crosslinker;
• and
• a homogeneous distribution of core/shell particles CS consisting of nanoparticles of a core-forming solid C of an inorganic and catalystically inert support and a shell S-forming catalyst that forms a shell S having a thickness that measures not more than 50 nm;
• wherein the core/shell particles CS have a maximum diameter of 1000 nm and the core C has an average outer as-prepared diameter in the range of 10 nm to 900 nm,
• wherein the shell S-forming catalyst, is disposed, in the form of discrete particles bordering one another or spaced apart directly on the surface of the core C, wherein the core/shell particles CS are prepared by providing a suspoemulsion of a first, disperse liquid phase I in a second, continuous liquid phase II, wherein the first, disperse liquid phase I comprises the nanoparticles of the core-forming solid C, a molecularly dispersely dissolved precursor substance PS for the shell and, optionally, a reactant R, and producing, in the first, disperse liquid phase I of the suspoemulsion, the submicron core/shell particles CS by chemical or physical conversion of the precursor substance PS for the shell.