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1. (WO2018022139) CORROSION INHIBITING POLYMER COMPOSITIONS, MIXTURES, AND METHODS OF USING THE SAME

Pub. No.:    WO/2018/022139    International Application No.:    PCT/US2017/015072
Publication Date: Fri Feb 02 00:59:59 CET 2018 International Filing Date: Fri Jan 27 00:59:59 CET 2017
IPC: C23F 11/08
C02F 5/10
C02F 5/12
C23F 11/173
Applicants: ECOLAB USA, INC.
Inventors: GILL, Jasbir
BANERJEE, Santanu
CHUDOMEL, John
Title: CORROSION INHIBITING POLYMER COMPOSITIONS, MIXTURES, AND METHODS OF USING THE SAME
Abstract:
Disclosed herein are polymer compositions useful for inhibiting corrosion of metal surfaces in industrial process water recirculating systems. The polymer compositions include interpolymers of about 90 mol% to about 97 mol% of a first monomer, about 0.01 mol% to about 5 mol% of a second monomer that is chemically different from the first monomer, and about 0.01 mol% to about 5 mol% of a third monomer that is chemically different from the first and second monomers; and optionally a fourth monomer that is chemically different from the first, second, and third monomers. About 0.05 ppm to about 200 ppm by weight of the polymer composition is dispersed in an industrial process water source, optionally in the presence of a divalent or higher valency metal ion. The dispersed polymer compositions significantly reduce the corrosion rate of metal surfaces of industrial equipment, even after one or more cycles of concentration.