초록 ▼

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 compou

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.

대표청구항 ▼

Method of treating cooling water systems of the type prone to scale formation on, and corrosion of, metallic parts in contact with said cooling water system, said method comprising the steps of adding to said cooling water system (1) from about 0.1 to about 15 parts per million of a water soluble zi

Method of treating cooling water systems of the type prone to scale formation on, and corrosion of, metallic parts in contact with said cooling water system, said method comprising the steps of adding to said cooling water system (1) from about 0.1 to about 15 parts per million of a water soluble zinc compound adapted to liberate Zn2+ions in solution; (2) from about 0.5 to about 50 parts per million of a water soluble sulfonated styrene/maleic anhydride copolymer, said copolymer comprising sulfonated styrene moieties of the formula [Figure] and moieties derived from maleic anhydride of the formula [Figure] wherein M is H or a water soluble cation, and (3) from about 0.2 to about 50 parts per million of an organo-phosphorus acid compound or water soluble salt thereof, all (1) (2) and (3) being based on 1 million parts of said cooling water system.