Corrosion inhibiting composition

Abstract

This invention relates to novel corrosion inhibitors which are capable of sequestering metal ions such as calcium and magnesium and are derived in part from renewable carbohydrate feedstocks. The corrosion inhibitors are mixtures containing one or more hydroxycarboxylic acid salts and one or more suitable oxoacid anion salts.

1 .- 41 . (canceled) 
     
     
         42 . A corrosion inhibiting composition for metal comprising:
 about 50% to about 99% by weight of at least one salt of a hydroxycarboxylic acid; and   about 1% to about 50% by weight of at least one salt of an oxoacid anion, wherein the at least one salt of an oxoacid anion is sodium borate, potassium borate, disodium octaborate, sodium metaborate, sodium molybdate, potassium molybdate, sodium aluminate, potassium aluminate, sodium stannate, potassium stannate, sodium germanate, potassium germanate, sodium antimonite, potassium antimonite, or a combination thereof.   
     
     
         43 . The corrosion inhibiting composition of  claim 42 , wherein the at least one salt of a hydroxycarboxylic acid comprises about 30% to about 75% by weight of at least one glucarate salt. 
     
     
         44 . The corrosion inhibiting composition of  claim 42 , wherein the at least one salt of a hydroxycarboxylic acid comprises about 45% to about 55% by weight of at least one glucarate salt. 
     
     
         45 . The corrosion inhibiting composition of  claim 43 , wherein the at least one salt of a hydroxycarboxylic acid further comprises about 0% to about 20% by weight of at least one gluconate salt, about 0% to about 10% by weight of at least one 5-keto-gluconate salt, about 0% to about 10% by weight of at least one tartrate salt, about 0% to 10% by weight of at least one tartronate salt, and about 0% to 10% by weight of at least one glycolate salt. 
     
     
         46 . The corrosion inhibiting composition of  claim 42 , wherein the composition comprises from about 70% to about 90% by weight of the at least one salt of hydroxycarboxylic acid. 
     
     
         47 . The corrosion inhibiting composition of  claim 42 , wherein the composition comprises from about 75% to about 85% by weight of the at least one salt of hydroxycarboxylic acid. 
     
     
         48 . The corrosion inhibiting composition of  claim 42 , wherein the composition comprises from about 10% to about 30% by weight of the at least one salt of an oxoacid anion. 
     
     
         49 . The corrosion inhibiting composition of  claim 42 , wherein the composition comprises from about 15% to about 25% by weight of the at least one salt of an oxoacid anion. 
     
     
         50 . A detergent composition comprising:
 about 50% to about 99% by weight of at least one salt of a hydroxycarboxylic acid; and   about 1% to about 50% by weight of at least one salt of an oxoacid anion, wherein the at least one salt of an oxoacid anion is sodium borate, potassium borate, disodium octaborate, sodium metaborate, sodium molybdate, potassium molybdate, sodium aluminate, potassium aluminate, sodium stannate, potassium stannate, sodium germanate, potassium germanate, sodium antimonite, potassium antimonite, or a combination thereof.   
     
     
         51 . A corrosion inhibiting composition for metal comprising:
 about 50% to about 99% by weight of at least one salt of a hydroxycarboxylic acid; and   about 1% to about 50% by weight of at least one salt of an oxoacid anion, wherein the at least one salt of a hydroxycarboxylic acid comprises a salt of glucaric acid, a salt of xylaric acid, a salt of galactaric acid, or combinations thereof.   
     
     
         52 . The corrosion inhibiting composition of  claim 51 , wherein the at least one salt of an oxoacid anion is sodium borate, potassium borate, disodium octaborate, sodium metaborate, sodium molybdate, potassium molybdate, sodium aluminate, potassium aluminate, sodium stannate, potassium stannate, sodium germanate, potassium germanate, sodium antimonite, potassium antimonite, or a combination thereof. 
     
     
         53 . The corrosion inhibiting composition of  claim 51 , wherein the salt of glucaric acid comprises disodium glucarate, sodium potassium glucarate, dipotassium glucarate, zinc glucarate, diammonium glucarate, or combinations thereof. 
     
     
         54 . The corrosion inhibiting composition of  claim 51 , wherein the composition comprises from about 30% to about 80% by weight of the salt of glucaric acid and from about 5% to about 40% by weight of the at least one salt of an oxoacid anion. 
     
     
         55 . The corrosion inhibiting composition of  claim 51 , wherein the salt of xylaric acid comprises disodium xylarate, sodium potassium xylarate, dipotassium xylarate, zinc xylarate, diammonium xylarate, or combinations thereof. 
     
     
         56 . The corrosion inhibiting composition of  claim 51 , wherein the composition comprises from about 15% to about 80% by weight of the salt of xylaric acid and from about 5% to about 40% by weight of the at least one salt of an oxoacid anion. 
     
     
         57 . The corrosion inhibiting composition of  claim 51 , wherein the salt of galactaric acid comprises dipotassium galactarate, disodium galactarate, sodium potassium galactarate, zinc galactarate, diammonium galactarate, or combinations thereof. 
     
     
         58 . The corrosion inhibiting composition of  claim 51 , wherein the composition comprises from about 15% to about 80% by weight of the salt of galactaric acid and from about 5% to about 40% by weight of the at least one salt of an oxoacid anion. 
     
     
         59 . A detergent composition comprising:
 about 50% to about 99% by weight of at least one salt of a hydroxycarboxylic acid; and   about 1% to about 50% by weight of at least one salt of an oxoacid anion, wherein the at least one salt of a hydroxycarboxylic acid comprises a salt of glucaric acid, a salt of xylaric acid, a salt of galactaric acid, or combinations thereof.