C - Chemistry – Metallurgy – 23 – F
Patent
C - Chemistry, Metallurgy
23
F
C23F 11/14 (2006.01) C02F 5/14 (2006.01) C23F 11/08 (2006.01) C23F 11/12 (2006.01) C23F 11/167 (2006.01)
Patent
CA 2055061
ABSTRACT OF THE DISCLOSURE Multi-functional cooling water treatment compositions tend to be unstable. A relatively stable water treatment composition includes 0.1 - 1.0% by weight of an azole copper corrosion inhibitor such as tolyltriazole; a steel corrosion inhibitor consisting of at least one of 0.6 - 6.0% by weight of a phosphono-carboxylic acid, 1.65 - 16.5% by weight of a water soluble molybdate salt and sufficient water soluble zinc salt to give a zinc concentration of 0.1 - 1.0% by weight; 0.3 - 3.0% by weight sulfonated acrylate copolymer deposit control agent, 0.16 - 1.6% by weight of an aminocarboxylic acid deposit control agent such as ethylenediaminetetraacetic acid, 0.1 - 1.0% by weight isothiazolone biocide, 0.6 - 6.0% by weight triphenylmethane blue dye, 0.1 - 1.0% by weight copper nitrate stabilizer and 0.48 - 4.8% by weight hydroxyethylene diphosphonic acid deposit control agent, the balance being water.
Bird Archer Inc.
Diversey Corporation
Sim & Mcburney
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