Inhibition of corrosion in aqueous systems

Abstract

The present invention provides an effective method of inhibiting corrosion on metallic surfaces in contact with a fluid contained in an industrial fluid system, which includes adding to such fluid an effective corrosion controlling amount of a particular generally recognized as safe (GRAS) compound.

1 . A method of inhibiting corrosion on metallic surfaces in contact with a fluid contained in an industrial fluid system, which comprises adding to such fluid an effective corrosion controlling amount of a generally recognized as safe (GRAS) compound selected from the group consisting of an acyloin, riboflavin, diallyl disulfide and cysteine.  
     
     
         2 . The method as recited in  claim 1  wherein said fluid system is selected from the group consisting of heat transfer systems, refinery systems, food and beverage systems, and mechanical coolant systems.  
     
     
         3 . The method as recited in  claim 1  wherein said fluid system is a cooling water system.  
     
     
         4 . The method as recited in  claim 1  wherein said fluid system is a steam header system.  
     
     
         5 . The method as recited in  claim 1  wherein said compound is added to the fluid system at active treatment levels ranging from about 0.025 to about 50 parts per million.  
     
     
         6 . The method as recited in  claim 6  wherein said compound is added to the fluid system at active treatment levels ranging from about 0.05 to about 10 parts per million.  
     
     
         7 . The method as recited in  claim 1  wherein said fluid system is a boiler water system.  
     
     
         8 . The method as recited in  claim 1  wherein said fluid system is a gas scrubbing system.  
     
     
         9 . The method as recited in  claim 1  wherein said fluid system is a pulp and papermaking system.  
     
     
         10 . A method of inhibiting corrosion on metallic surfaces in contact with a fluid contained in an industrial fluid system, which comprises adding to such fluid an effective corrosion controlling amount of a diallyl disulfide compound.  
     
     
         11 . The method as recited in  claim 10  wherein said fluid system is selected from the group consisting of heat transfer systems, refinery systems, food and beverage systems, and mechanical coolant systems.  
     
     
         12 . The method as recited in  claim 10  wherein said fluid system is a cooling water system.  
     
     
         13 . The method as recited in  claim 10  wherein said fluid system is a steam header system.  
     
     
         14 . The method as recited in  claim 10  wherein said compound is added to the fluid system at active treatment levels ranging from about 0.025 to about 50 parts per million.  
     
     
         15 . The method as recited in  claim 10  wherein said compound is added to the fluid system at active treatment levels ranging from about 0.05 to about 10 parts per million.  
     
     
         16 . The method as recited in  claim 10  wherein said fluid system is a boiler water system.  
     
     
         17 . The method as recited in  claim 10  wherein said fluid system is a gas scrubbing system.  
     
     
         18 . The method as recited in  claim 10  wherein said fluid system is a pulp and papermaking system.