Method for inhibiting corrosion and deposition in aqueous system

Liquid purification or separation – Processes – Preventing – decreasing – or delaying precipitation,...

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210700, 210701, 252181, 25238921, 25238923, 25238952, 422 15, 422 17, 422 19, C02F 514

Patent

active

046630538

ABSTRACT:
A corrosion inhibition and scale control method and composition are disclosed. The method comprises, adding to a cooling water system, for which protection is desired, a water soluble zinc salt, a water soluble sulfonated styrene/maleic anhydride (SSMA) copolymer and an organo-phosphorus acid compound. A corrosion inhibitor compound such as a 1,2,3-triazole or thiazole compound may be added to afford additional protection. Molybdate salts may also be included as optional corrosion inhibitors. A cellulose gum material and/or water soluble acrylic acid polymer or copolymer may be conjointly used with the SSMA copolymer.

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