C - Chemistry – Metallurgy – 23 – F
Patent
C - Chemistry, Metallurgy
23
F
134/39, 31/48
C23F 11/14 (2006.01) C02F 5/14 (2006.01) C23F 11/10 (2006.01) C23F 11/16 (2006.01)
Patent
CA 1142744
ABSTRACT OF THE DISCLOSURE A composition and method for controlling corrosion in aqueous systems with multiple metallurgies such as industrial cooling equipment is disclosed. The composition generally includes: 1) a triazole chose from the group consisting of tolyltriazole and benzotriazole, 2) an aliphatic mono- or di- carboxylic acid having from 8-38 carbon atoms this is capable of controlling corrosion of mild steel, and 3) a nonionic wetting agent. In an alternate embodiment, the composition also includes a scale inhibitor chosen from the group consisting of polyol esters, 1-hydrixyethylidene-1,1- diphosphonic acid, amino tri(methylene phosphonic acid), and 2-phosphono- butane-tricarboxylic acid-1,2,4. The method of the invention entails the use of the above compositions in aqueous systems at dosage levels of at least 10 ppm.
367887
Christensen Ronald
Gelazis Audrone E.
Nalco Chemical Company
Smart & Biggar
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