protection agent free of chromium and corrosion process for corrosion protection.

polymerizable composition, chromium-free, for the organic coating of metallic materials, comprising (a) at least one compound of titanium, silicon and / or zirconium of general formula (I) (see formula) wherein R 1 and / or R 2 denote H, alkyl having 1 to 12 carbon atoms, aralkyl or -CO-OY group, R 3 = H or alkyl having 1 to 12 carbon atoms, me = an ion titanium, silicon or zirconium, X = H, alkyl having 1 to 12 carbon atoms, aryl or aralkyl, alkoxy, aroxyl, sulfonyl, phosphate, pyrophosphate, Y = H, alkyl having 1 to 12 carbon atoms or me, n = 0 to 4 (b) at least one other olefinically unsaturated comonomer with at least two olefinically unsaturated per molecule double bonds, (c) optionally further comonomers with a double bond olefinically unsaturated group per molecule, (d) at least one polymerization initiator free radical and / or cationic and can be activated at least one initiator via irradiation and that contains no additional solvent.