Patent ID: 6599445
Filing Date: 2003-07-29
Classification: C23F

Abstract:
A method of using a corrosion inhibitor composition for reducing the corrosion rate of a metal by a fluid having at least one corrosion agent, said method comprising:(a) introducing said corrosion inhibitor composition into said fluid, said inhibitor composition having at least one compound wherein said at least one compound wherein said at least one compound is a quaternized substituted diethylamino compound having the formula: â€ƒwherein, R1 is a moiety selected from the group consisting of: (i) substituted and unsubstituted, saturated and unsaturated alkyl groups having from about 5 to about 29 carbon atoms; (ii) substituted and unsubstituted, saturated and unsaturated alkyl groups having from about 5 to about 29 carbon atoms, wherein said alkyl group at least contains one or more atoms selected from the group consisting of oxygen, sulfur and phosphorous; and (iii) combinations thereof; each R3 is independently a moiety selected from the group consisting of â€”CO2H, â€”SO3H, â€”PO3H2, â€”CO2R7, â€”CONH2, â€”CONHR7 and â€”CON(R7)2 groups and combinations thereof; each R7 is independently selected from the group consisting of hydrogen and linear and branched alkyl, aryl, alkylaryl, cycloalkyl and heteroaromatic groups having from 1 to about 10 carbon atoms, and combinations thereof; R8 is hydrogen or a linear alkyl group having from 1 to 10 carbon atoms; and n=0 to about 8, p=1 to about 5 and q=2 to about 10; and (b) contacting said metal with the fluid of step (a).