摘要:
A method for inhibiting corrosion on metallic surfaces in contact with a liquid hydrocarbon media is provided. A corrosion inhibitor composition is dispersed into a liquid hydrocarbon media to form a protective film on the metallic surfaces. The corrosion inhibitor includes a polyamic acid having structure I: A-HN—(CH2)2—[—NH(CH2)2—]x—NH-A I or structure II: A-HN—(CH2)3—[—O—(CH2)2—]n—O—(CH2)3—NH-A II wherein A has structure III: R—CH═CH—CH(CO2H)—CH2C(O)— III and R is a (C8-C22) alkyl group or a (C8-C22) alkenyl group, x is an integer from 0 to 6 and n is an integer from 1 to 6. A method for preparing the corrosion inhibitor is also provided.