By adopting weight loss method,CMB-4510 A inhibitor rapid assessment instrument,polarization curves and electrochemical impedance spectroscopy,studied the system of Tween 40 in acidic solution,zinc sulfate,sodium gluconate three inhibitors used alone and with Tween 40 as lord of the binary complex system inhibition effect on the 20#carbon steel in acidic system. The experimental results show that temperature of 30 ℃,p H value of 4,Tween 40 can inhibit corrosion of 20#carborn steel well,and Tween 40 with zin...