The present invention is directed to a passivating material suitable for
passivating a metal surface. The passivating material comprises a polymer
which comprises (a) at least one nitro group, and/or pyridine group,
and/or phenolic hydroxyl group; and (b) at least one group selected from
a phosphorous-containing group and/or a carboxylic acid group, wherein
the at least one phosphorous-containing group is selected from a
phosphate, a phosphite, or a non-nitrogen substituted phosphonate.