Method for controlling corrosion using molybdate compositions
Patent
·
OSTI ID:6270089
A method is described for inhibiting corrosion in an aqueous system comprising adding to the system an effective amount of a corrosion inhibiting composition comprising: (a) a molybdate ion source; and (b) a water-soluble component selected from the group consisting of polymaleic anhydride; amine adducts of polymaleic anhydride; polymers prepared by polymerizing maleic anhydride with dimethyl diallyl ammonium chloride or homologs thereof; polymers prepared from 50-70%, by weight, acrylic acid or methacrylic acid, 10-40%, by weight, 2-acrylamido-2-methylpropyl sulfonic acid or 2-methyacrylamido-2-methylpropyl sulfonic acid and 10-30%, by weight, of a polyalkyleneoxide compound; salts of the above described polymers; phosphonates selected from the group consisting of 2-phosnphonobutane-1,2,4 tricarboxylic acid and hydroxyphosphono acetic acid; phosphino carboxylic acids; polyphosphoric acid and polyhydroxy esters of polyphosphoric acid; wherein the weight of (a):(b), on an active basis, ranges from about 10:1 to about 1:10.
- Assignee:
- Calgon Corp., Pittsburgh, PA
- Patent Number(s):
- US 4798683
- OSTI ID:
- 6270089
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320106* -- Energy Conservation
Consumption
& Utilization-- Building Equipment-- (1987-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ACRYLIC ACID
AMINES
AMMONIUM CHLORIDES
AMMONIUM COMPOUNDS
AMMONIUM HALIDES
ANHYDRIDES
APPLIANCES
AQUEOUS SOLUTIONS
CARBOXYLIC ACIDS
CHEMICAL COMPOSITION
CHLORIDES
CHLORINE COMPOUNDS
CORROSION INHIBITORS
CORROSION PROTECTION
CORROSION RESISTANCE
CORROSIVE EFFECTS
DICARBOXYLIC ACIDS
DISPERSIONS
ESTERS
HALIDES
HALOGEN COMPOUNDS
MALEIC ACID
MIXTURES
MOLYBDATES
MOLYBDENUM COMPOUNDS
MONOCARBOXYLIC ACIDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
OXYGEN COMPOUNDS
PHOSPHONATES
PHOSPHORIC ACID ESTERS
POLYMERS
REFRACTORY METAL COMPOUNDS
SOLUBILITY
SOLUTIONS
TRANSITION ELEMENT COMPOUNDS
320106* -- Energy Conservation
Consumption
& Utilization-- Building Equipment-- (1987-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ACRYLIC ACID
AMINES
AMMONIUM CHLORIDES
AMMONIUM COMPOUNDS
AMMONIUM HALIDES
ANHYDRIDES
APPLIANCES
AQUEOUS SOLUTIONS
CARBOXYLIC ACIDS
CHEMICAL COMPOSITION
CHLORIDES
CHLORINE COMPOUNDS
CORROSION INHIBITORS
CORROSION PROTECTION
CORROSION RESISTANCE
CORROSIVE EFFECTS
DICARBOXYLIC ACIDS
DISPERSIONS
ESTERS
HALIDES
HALOGEN COMPOUNDS
MALEIC ACID
MIXTURES
MOLYBDATES
MOLYBDENUM COMPOUNDS
MONOCARBOXYLIC ACIDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
OXYGEN COMPOUNDS
PHOSPHONATES
PHOSPHORIC ACID ESTERS
POLYMERS
REFRACTORY METAL COMPOUNDS
SOLUBILITY
SOLUTIONS
TRANSITION ELEMENT COMPOUNDS