Corrosion inhibitor

Abstract

A food grade corrosion inhibitor for admixture with a food-grade petroleum-based oil is derived from an admixture of food-grade components. The corrosion inhibitor, a food-grade isoalkane, a food-grade ester and imidazoline. The additive is incorporated into a lubricating component such as mineral oil, etc.

Having thus described the invention, what is claimed is: 
     
         1 . A food-grade corrosion inhibitor for use in a lubricant composition, comprising:
 (a) from about 70% to about 90%, by volume, based on the total weight of the inhibitor, of a food-grade isoalkane;   (b) from about 5% to about 15%, by volume, based on the total volume of the inhibitor, of a food-grade ester; and   (c) from about 1% to about 10%, by volume, based on the total volume of the inhibitor, of imidazoline.   
     
     
         2 . The corrosion inhibitor of  claim 1  wherein the ester corresponds to the formula:
   R—C—OR′,
 
 
       wherein R is a hydrocarbon radical, saturated or unsaturated R′, having from about C 12  to about C 20  in the hydrocarbon portion thereof and R′ is lower alkyl ranging from about C 1  to C 3 . 
     
     
         3 . The inhibitor of  claim 1  wherein the isoalkane is a mixture of C 6  to C 20  petroleum distillate. 
     
     
         4 . A lubricant comprising:
 (a) a major amount of mineral oil and (b) the inhibitor of  claim 1 .   
     
     
         5 . The lubricant of  claim 4  wherein each of the components is a food grade component. 
     
     
         6 . The lubricant of  claim 5  wherein the mineral oil is white oil. 
     
     
         7 . The lubricant of  claim 6  which comprises, by volume, based on the total volume,
 (a) from about 80% to about 99% of the mineral oil, and 
 (b) from about 1% to about 20% of the additive.