Claims
- 1. A method for inhibiting corrosion of ferrous metal surfaces in an aqueous medium containing at least one of living Skeletonema costatum or living fish, the method comprising incorporating into the medium a corrosion inhibitor in an amount sufficient to inhibit corrosion of ferrous metal surfaces in the medium, the corrosion inhibitor having a BOD-28 of at least about 70% in the medium and comprising a water-soluble agent selected from the group consisting of compositions of the formula ##STR12## compositions of the formula ##STR13## and mixtures thereof, wherein R is R.sup.2 --OCH.sub.2 CH.sub.2 --.sub.x, wherein R.sup.2 is an alkyl, aryl, or aralkyl group of from about five to about fifteen carbon atoms, each carbon atom having at least one hydrogen and x is an integer of from one to about ten, and R'N is a basic nitrogen compound that is at least water-dispersible.
- 2. A method as set forth in claim 1 wherein the agent is a composition of the formula ##STR14## wherein R and R'N are defined in claim 1.
- 3. A method as set forth in claim 2 wherein R.sup.2 is an unsubstituted alkyl group.
- 4. A method as set forth in claim 3 wherein the basic nitrogen compound is a compound of the formula ##STR15##
- 5. A method as set forth in claim 3 wherein x is from about two to about five.
- 6. A method as set forth in claim 1 wherein the corrosion inhibitor has an EC.sub.50 for Skeletonema costatum of at least about 1 ppm by weight.
- 7. A method as set forth in claim 6 wherein the corrosion inhibitor further has a partitioning less than about three, a YL of, at most, about three and a flash point greater than about 56.degree. C.
- 8. A method as set forth in claim 1 wherein the medium contains fish.
- 9. A method as set forth in claim 1 wherein R.sup.2 is an unsubstituted alkyl, aryl or aralkyl group of from about five to about fifteen carbon atoms.
- 10. A method for inhibiting corrosion of ferrous metal surfaces in an aqueous medium containing at least one of living Skeletonema costatum or living fish, the method comprising incorporating into the medium a corrosion inhibitor in an amount sufficient to inhibit corrosion of ferrous metal surfaces in the medium, the corrosion inhibitor having a BOD--28 of at least about 70% in the medium and comprising the acid/base reaction product of a phosphate ester of the formula ##STR16## wherein R is R.sup.2 --OCH.sub.2 CH.sub.2 --.sub.x, wherein R.sup.2 is an alkyl, an aryl, or aralkyl group of from about five to about fifteen carbon atoms, each carbon atom having at least one hydrogen and x is an integer of from one to about ten, and a basic nitrogen compound that is at least water-dispersible.
- 11. A method as set forth in claim 10 wherein the agent is a composition of the formula ##STR17## wherein R and R'N are defined in claim 8 where R is defined as in claim 8 and where R'N is a basic nitrogen compound.
- 12. A method as set forth in claim 11 wherein R.sup.2 is an unsubstituted alkyl group.
- 13. A method as set forth in claim 12 wherein the basic nitrogen compound is a compound of the formula ##STR18##
- 14. A method as set forth in claim 12 wherein x is from about two to about five.
- 15. A method as set forth in claim 10 wherein the corrosion inhibitor has an EC.sub.50 for Skeletonema costatum of at least about 1 ppm by weight.
- 16. A method as set forth in claim 15 wherein the corrosion inhibitor further has a partitioning less than about three, a YL of, at most, about three and a flash point greater than about 56.degree. C.
- 17. A method as set forth in claim 10 wherein the medium contains fish.
- 18. A method as set forth in claim 10 wherein R.sup.2 is an unsubstituted alkyl, aryl or aralkyl group of from about five to about fifteen carbon atoms.
Parent Case Info
This is a continuation application of co-pending application U.S. Ser. No. 07/871,451, filed Apr. 21, 1992 now abandoned.
US Referenced Citations (18)
Foreign Referenced Citations (1)
Number |
Date |
Country |
3526640 |
Jan 1987 |
DEX |
Continuations (1)
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Number |
Date |
Country |
Parent |
871451 |
Apr 1992 |
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