Corrosion inhibitors

Details Corrosion inhibitors Corrosion inhibitors

C - Chemistry, Metallurgy

23

F

31/45

C23F 11/16 (2006.01) C23F 11/08 (2006.01)

Patent

CA 1159246

"CORROSION INHIBITORS" ABSTRACT Corrosion and scale inhibiting compositions which are useful in recirculating aqueous systems comprise a mixture of a phosphate com- pound, a phosphonate compound, an aryl triazole, and a salt of a metal selected from the group consisting of molybdenum, tungsten and chromium. The components of the mixture are present in an amount of at least 0.5 and not greater than 50% of the total composition. An example of an effective anticorrosion composition comprises a mixture of sodium tri- polyphosphate, 1-hydroxyethyledene-1, 1-triphosphonic acid, benzotriazole, and sodium molybdate, said composition being present in an amount of from about 5 to about 5000 ppm.

381755

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