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US 2025/0137142 A1Published application
Corrosion inhibitor for mild steel in circulating water systems
AssigneeHalliburton Energy Services, Inc.
InventorsStanislav Barskov, David Fulmer, Richard Fruit, Nathan Thachankary
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Abstract
A method of inhibiting corrosion in a circulating water system by adding a corrosion inhibitor consisting essentially of a phosphate-free corrosion inhibitor (PFCI) comprising a polymaleic acid copolymer and optionally a metal to a circulating water stream in the circulating water system.
Claims20
A method comprising:
- inhibiting corrosion in a circulating water system by:
- adding a corrosion inhibitor consisting essentially of a phosphate-free corrosion inhibitor (PFCI) comprising a polymaleic acid copolymer and optionally a metal to a circulating water stream in the circulating water system.
A method comprising:
- inhibiting corrosion in a circulating water system by:
- adding a phosphate-free corrosion inhibitor (PFCI) to a circulating water stream in the circulating water system,
- wherein the PFCI comprises a polymaleic acid copolymer and:
- (a) wherein the PFCI does not include a metal, and wherein the concentration of the copolymer in the circulating water stream is in a range of from about 20 to about 100 ppm;
- or
- (b) wherein the PFCI further comprises a metal, and wherein the concentration of the PFCI in the circulating water stream is in a range of greater than zero to about 15 ppm.
3 more elements
A system comprising:
- a circulating water system comprising:
- a heat exchanger;
- a cooling tower;
- water lines configured to circulate a circulating water stream, and comprising a first circulating water line configured to circulate a portion of the circulating water stream comprising relatively cooler water from the cooling tower to the heat exchanger and a second circulating water line configured to circulate another portion of the circulating water stream comprising relatively hotter water from the heat exchanger to the cooling tower;
- and
- a dosing system comprising one or more dosing apparatus configured to add one or more components of a corrosion inhibitor to the circulating water stream, wherein at least one of the one or more dosing apparatus contains a phosphate-free corrosion inhibitor (PFCI) and is configured to add the PFCI to the circulating water stream, wherein the corrosion inhibitor comprises a polymaleic acid copolymer and optionally a metal.
3 more elements
Dependencies are inferred from the claim text.