Method and composition for inhibiting general and pitting corrosion in cooling tower water
Patent
·
OSTI ID:6352914
A method is described of inhibiting the pitting corrosion rate of carbon steel in a cooling tower system comprising: adding to a cooling tower liquid used in an open, recirculating cooling tower system an effective amount of a corrosion-inhibiting composition comprising 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 orthophosphate, calculated as phosphate, said corrosion-inhibiting composition being substantially free of active zinc, said cooling tower liquid containing a calcium compound, the liquid of said cooling tower liquid consisting essentially of water, and circulating said cooling tower liquid in said system.
- Assignee:
- Gulf Coast Performance Chemical, Inc., Houston, TX (United States)
- Patent Number(s):
- US 5227133; A
- Application Number:
- PPN: US 7-982013
- OSTI ID:
- 6352914
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
CALCIUM COMPOUNDS
CARBON STEELS
CHEMICAL REACTIONS
COOLING TOWERS
CORROSION
CORROSION INHIBITORS
CORROSION PROTECTION
ELEMENTS
IRON ALLOYS
IRON BASE ALLOYS
METALS
MOLYBDATES
MOLYBDENUM COMPOUNDS
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
PITTING CORROSION
REFRACTORY METAL COMPOUNDS
STEELS
TRANSITION ELEMENT COMPOUNDS
ZINC
360105* -- Metals & Alloys-- Corrosion & Erosion
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
CALCIUM COMPOUNDS
CARBON STEELS
CHEMICAL REACTIONS
COOLING TOWERS
CORROSION
CORROSION INHIBITORS
CORROSION PROTECTION
ELEMENTS
IRON ALLOYS
IRON BASE ALLOYS
METALS
MOLYBDATES
MOLYBDENUM COMPOUNDS
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
PITTING CORROSION
REFRACTORY METAL COMPOUNDS
STEELS
TRANSITION ELEMENT COMPOUNDS
ZINC