Polyepoxysuccinic acid derivatives and their use for scale prevention and corrosion control in aqueous systems

摘要

A method and compounds for inhibiting the formation of scale and controlling corrosion is disclosed. The method is particularly effective at inhibiting the formation and deposition of calcium scales in circulating aqueous systems such as cooling waters systems, as well as inhibiting or preventing corrosion of ferrous-based metals in contact with aqueous systems. The method comprises introducing into the aqueous system a compound of the general formula: CHEM wherein R is hydrogen, alkyl, aryl, substituted alkyl or substituted aryl; R' and R'' are each independently hydrogen, C1-4 alkyl or C1-4 substituted alkyl; Z is NH, NR, O or S where R is as described above; n is a positive integer greater than 1; f is a positive integer; and each M independantly is H, a water soluble cation ( e.g.,NH4+, alkali metal), or a C1-C3 alkyl group.