Abstract: Metal pigments stabilized against chemical influences particularly for use in aqueous paint systems by blending with the reaction product of an amine-aldehyde condensation product etherified with low molecular weight alcohols and an acidic phosphoric acid derivative of the general formulaP (O) R.sub.x (OH).sub.yor a derivative of a polyphosphoric acid of the general formula[P (O) R.sub.x (OH).sub.y-z O.sub.0.5 z ]n,wherein R is a radical linked to the phosphoric or polyphosphoric acid radical through a C--P-- or C--O--P--linkage and which contains a group reactive with said amine-aldehyde condensation product; x being a number less than 3 and x+y equaling 3, z being the number of P--O--links stemming from a P-atom and being less than y, and n being the degree of polymerization.