Trifunctional amine based corrosion inhibitor compositions

A process for preparing a corrosion inhibitor composition, comprising:

• reacting a trifunctional amine and a tall oil fatty acid at a temperature of at least 100° C. for at least 10 hours to form a condensation product, wherein the weight ratio of the trifunctional amine to the tall oil fatty acid in the condensation product ranges from 0.5:1 to 3:1, wherein the trifunctional amine is selected from the group consisting of triaminohexane, triaminoheptene, triaminooctane, triaminononane, triaminodecane, triaminoundecane, triaminododecane, triaminocyclohexane, triaminocycloheptane, triaminocyclooctane, triaminocyclononane, triaminocyclodecane, triaminocycloundecane, triaminocyclododecane, triaminohexene, triaminoheptene, triaminooctene, triaminononene, triaminodecene, triaminoundecene, triaminododecene, tetraaminohexane, tetraaminoheptane, tetraaminooctane, tetraaminononane, tetraaminodecene, tetraaminoundecene, tetraaminododecane, tetraaminocyclohexane, tetraaminocycloheptane, tetraaminocyclooctane, tetraaminocyclononane, tetraaminocyclodecane, tetraaminocycloundecane, tetraaminocyclododecane, tetraaminohexene, tetraaminoheptene, tetraaminooctene, tetraaminononene, tetraaminodecene, tetraaminoundecene, tetraaminododecene, and isomers thereof, or combinations thereof;
• and
• adding an additive package comprising potassium iodide in an amount ranging from 0.05 wt. % to 5 wt. %;
• wherein the corrosion inhibitor composition demonstrates a corrosion rate less than 0.05 lb/ft2 in 6 hours at 200° F.

A process for inhibiting corrosion of a metallic substrate, the method comprising:

• applying to the metallic substrate a corrosion inhibitor composition comprising
• a condensation product of a trifunctional amine and a tall oil fatty acid, wherein the trifunctional amine is selected from the group consisting of triaminohexane, triaminoheptane, triaminooctane, triaminononane, triaminodecane, triaminoundecane, triaminododecane, triaminocyclohexane, triaminocycloheptane, triaminocyclooctane, triaminocyclononane, triaminocyclodecane, triaminocycloundecane, triaminocyclododecane, triaminohexene, triaminoheptene, triaminooctene, triaminononene, triaminodecene, triaminoundecene, triaminododecene, tetraaminohexane, tetraaminoheptane, tetraaminooctane, tetraaminononene, tetraaminodecane, tetraaminoundecane, tetraaminododecane, tetraaminocyclohexane, tetraaminocycloheptane, tetraaminocyclooctane, tetraaminocyclononane, tetraaminocyclodecane, tetraaminocycloundecane, tetraaminocyclododecane, tetraaminohexene, tetraaminoheptene, tetraaminooctene, tetraaminononene, tetraaminodecene, tetraaminoundecene, tetraaminododecene, and isomers thereof, or combinations thereof;
• wherein the weight ratio of the trifunctional amine to the fatty acid in the condensation product ranges from 0.5:1 to 3:1;
• and
• an additive package comprising potassium iodide in an amount ranging from 0.05 wt. % to 5 wt. %;
• wherein the corrosion inhibitor composition demonstrates a corrosion rate less than 0.05 lb/ft2 in 6 hours at 200° F.