Abstract: Two corrosion inhibitors，YSH-05 and JAY-01，are synthesized respectively with ketone，aldehyde，amine and quinoline，benzyl chloride.Their performance is studied by using static weight-loss method，electrochemical polarization curve and scanning electron microscope.The results show that corrosion inhibitor JAY-01 outweighs YSH-05 and JAY-01 can efficiently be used in acidizing operation at 135℃.YSH-05 is a mixed mode corrosion inhibitor mainly repressing negative pole process and JAY-01 is a negative pole mode corrosion inhibitor.The adsorption of YSH-05 and JAY-01 fits Bockris-Swinkels adsorption isotherm on the iron and steel surface，and corrosion inhibitor molecules form protective layers on the surface of N80 steel，which can restrain acidic component erodes N80 steel.

Key words: acidizing corrosion inhibitor, Mannich base, quaternary ammonium salt, comparative study, adsorption isotherms