Method and composition for inhibiting general and pitting corros

Details Method and composition for inhibiting general and pitting corros Method and composition for inhibiting general and pitting corros

1992-11-24

1993-07-13

Warden, Robert J.

Chemical apparatus and process disinfecting, deodorizing, preser

Process disinfecting, preserving, deodorizing, or sterilizing

Maintaining environment nondestructive to metal

210697, 210699, 210700, 210701, 2523892, 25238954, 25238967, 422 14, 422 15, C23F 1118

Patent

active

052271331

ABSTRACT:
A method of inhibiting the pitting corrosion rate of carbon steel in a cooling tower system comprising adding to a cooling tower water an effective amount of a corrosion inhibiting composition containing from about 1 to about 10 ppm of a water soluble molybdate, calculated as molybdate and from about 5 to about 25 ppm of a stabilized phosphate, calculated as phosphate, the corrosion inhibiting composition being substantially free of active zinc, and circulating the water in the system.

REFERENCES:
patent: 4176059 (1979-11-01), Suzuki
patent: 4440721 (1984-04-01), Wilson et al.
patent: 4711725 (1987-12-01), Amick et al.
patent: 4717495 (1988-01-01), Hercamp et al.
patent: 4728452 (1988-03-01), Hansen
patent: 4873011 (1989-10-01), Jung et al.
patent: 4963290 (1990-10-01), Bressan et al.

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