Patent ID: 8765020

Claim:
A method for mitigating or preventing corrosion of metal, the method comprising adding an additive to a system wherein the system has conditions selected from the group consisting of: the system has both O 2 and CO 2 present; and the system is at an alkaline pH and has both O 2 and CO 2 present; and the additive comprises a benzyl pyridinium quat corrosion inhibitor and a synergistic combinant selected from the group consisting of propargyl alcohol and 2-mercaptoethyl sulfide; wherein the O 2 is present at a concentration of at least 1 ppm and the CO 2 is present at a concentration of at least 3 percent; wherein the system is a system for capturing and sequestering CO 2 produced from the combustion of fossil fuels; and the system is utilized to convey or retain combustion gases.