Use of molybdate as a cooling water corrosion inhibitor at highe

Details Use of molybdate as a cooling water corrosion inhibitor at highe Use of molybdate as a cooling water corrosion inhibitor at highe

1991-07-09

1993-03-09

Silverman, Stanley S.

Liquid purification or separation

Processes

Preventing, decreasing, or delaying precipitation,...

210699, 210700, 210701, 422 15, 422 16, 422 17, 422 18, 422 19, 252181, 2523892, 25238921, 25238952, 25238953, 25238954, 252390, C23F 11167, C02F 514

Patent

active

051924471

ABSTRACT:
A corrosion inhibitor treatment composition for cooling water systems at elevated temperatures in which no chromate is used is disclosed, comprising a combination of a localized corrosion inhibitor in the form of a salt of molybdenum, vanadium, or tungsten, a reduced level of a general corrosion and scale inhibitor comprising zinc, nickel or a combination thereof, orthophosphate, an organic phosphonate, and a stabilizing agent.

REFERENCES:
patent: 4217216 (1980-08-01), Lipinski
patent: 4446028 (1984-05-01), Becker
patent: 4640793 (1987-02-01), Persinski et al.
patent: 4744949 (1988-05-01), Hoots et al.
patent: 4784774 (1988-11-01), Amjad et al.
patent: 4806310 (1989-02-01), Mullins et al.
patent: 4818506 (1989-04-01), Lin et al.
patent: 4874527 (1989-10-01), Gill

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