anticorrosive agent chromium-free thermoset

crosslinkable anticorrosive agent, chromium-free, for the primer (first coating) of metal substrates, having a pH between 1 and 3 and containing water and a) complex ions fluorinated titanium and / or zirconium, b) at least one anticorrosive pigment, c) at least one soluble organic polymer or water-dispersible in water in the pH range mentioned, queen aqueous and in a concentration of 50% by weight solution has a pH between 1 and 3, wherein the polymer organic c) contienei) at least two ethylenically unsaturated monomers polymerizable by radicals chosen entreacido acrylic, methacrylic acid, acrylate and methacrylate, which is composed of at least one acrylate monomer and methacrylate eligeentre, yii) has in the a portion of polymer monomers bearing acid groups or phosphoric phosphate el0,5 between 4% molar.