FIELD: chemistry.
SUBSTANCE: composition contains phosphonomethylated polyamine, fluroacid, silane and inorganic phosphorus-containing acid. The composition enables formation of conversion or passivating coating on metals, particularly on zinc-coated metal surfaces through contact of a metal surface with the said composition.
EFFECT: higher corrosion resistance of a pure or painted metal surface, improved adhesion properties of painted metal and smoothness of the surface of unpainted metal.
15 cl, 7 ex, 7 tbl
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