Patent ID: 7220298

Claim:
A corrosion inhibiting mixture comprising (A1) at least one corrosion-inhibiting pigment, (A2) amorphous silica modified with metal ions, and (A3) at least one compound of the general formula RO-M[-O—P(O)(OH)—O—P(O)(OR 1 ) 2 ] 3 .HP(O)(OR 2 ) 2 in which the variables and indices have the following meanings: R is a first aliphatic or cycloaliphatic radical; R 1 is a second aliphatic or cycloaliphatic radical; R 2 is a third aliphatic or cycloaliphatic radical; M is at least one central atom selected from the group of Lewis acceptors; and R, R 1 , and R 2 are different.