Method of inhibiting corrosion of a metal in an industrial water system
AssigneeEcolab USA Inc.
InventorsBingzhi Chen, Malgorzata A. Krawczyk, Michael P. Weberski, Jr.
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Abstract
The invention provides a method of inhibiting corrosion of a metal in an industrial water system, the method comprising: (i) treating water of the industrial water system with a corrosion inhibiting-effective amount of a phosphorus-based treatment program comprising a phosphorus-based compound to provide a first treated industrial water, and (ii) treating the first treated industrial water with a corrosion inhibiting-effective amount of a metal-containing treatment program to provide a second treated industrial water, to inhibit corrosion of metal in the system.
Claims20
A method of inhibiting corrosion of a metal in an industrial water system, the method comprising:
- (i) treating water of the industrial water system with a corrosion inhibiting-effective amount of a phosphorus-based treatment program comprising a phosphorus-based compound to provide a first treated industrial water, and
- (ii) treating the first treated industrial water with a corrosion inhibiting-effective amount of a metal-containing treatment program to provide a second treated industrial water, to inhibit corrosion of metal in the system,
- wherein the metal-containing treatment program comprises a metal-based corrosion inhibitor comprising lanthanum, cerium, yttrium, scandium, or a combination thereof, and the metal-containing treatment program does not contain zinc.
Dependencies are inferred from the claim text.