FIELD: metallurgy.
SUBSTANCE: agent with pH of 1 to 3 is intended to be applied as primary coating on metal substrates and contains water, as well as a) ions of fluorine complexes of titanium and/or zirconium, b) at least one corrosion-protective pigment, c) at least one water-soluble or water-dispersed polymer in the above pH range, which has pH 1-3 in water solution with concentration of 50 wt %. At that, c) includes i) links at least of two different ethylenically unsaturated monomers chosen from the group including acrylic acid, methacrylic acid, composite esters of acrylic acid and composite esters of methacrylic acid; at that, at least one monomer is chosen from the group including composite esters of acrylic acid and composite esters of methacrylic acid, and ii) 0.5 to 4.0 mol % of monomeric links with groups of phosphoric acid or ester of phosphoric acid. Application method of coating on metal strip involves application of the above agent of such thickness so that a coating with thickness of 0.5 to 10.0 mcm is formed as a result of its curing performed by heating of metal strip to the temperature of not more than 150°C during not more than 60 seconds.
EFFECT: improving properties of corrosion-resistant protection and adhesion of coating to organic varnishes.
17 cl
