Method of inhibiting scale and controlling corrosion in cooling water systems.

摘要

There is disclosed a method for simultaneously controlling the deposition of scale and the formation of corrosion in a cooling water system comprising adding to the system (i) a water soluble copolymer having the structure: wherein E comprises the repeat unit obtained after polymerization of an alpha, beta ethylenically unsaturated monomer, R1 is H or lower (C1-C4) alkyl, R2 is (CH2-CH2-O)n, or mixture of both, n is an integer of from 1 to about 40 R3 is H, lower (C1-C4 alkyl or an acetate, c is the molar percentage being between 0-95 molar %, d is the molar percentage being between 100-5 molar %, c and d should add up to 100%; or (ii) a water soluble terpolymer having the structure: where E comprises the repeat unit obtained after polymerization of an alpha, beta ethylenically unsaturated monomer, and wherein R1 is H or lower (C1-C4) alkyl, F is H2 or O, M is a water soluble cation, R2 is (CH2-CH2-O)n, or a mixture of both, n is an integer of from 1 to about 40, R3 is H lower (C1-C4) alkyl or an acetate.