Ultrasound Assisted Green Synthesis of 3-(4- (dimethylamino) phenyl)-1-phenylprop-2-en-1-one and its Heterocyclics Derived from Hydrazine, Urea and Thiourea as Corrosion Inhibitor for Mild Steel in 1M

The purpose of present study was to investigate the corrosion inhibition propertyof 3-(4-(dimethylamino) phenyl)-1-phenylprop-2-en-1-one(a chalcone, inh-1) derived fromcondensation of acetophenone and 4, 4- dimethylamino benzaldehyde and threeheterocyclics derived from this using hydrazine (inh-2), urea (inh-3) and thiourea (inh-4) on mild steel (ms) in 1m hcl by weight loss and electrochemical methods. it was foundthat inhibition efficiency increases with inhibitor concentration and maximum efficiency wasobtained at 25 ppm. among the studied inhibitors, inh-4 shows the best inhibition efficiencyof 98.26 %. variation of impedance parameters (rct and cdl) suggests the formation ofprotective film of inhibitors on ms surface. the adsorption of inhibitors on ms surface wasalso studied using scanning electron microscopy (sem) and energy dispersive x-rayspectroscopy (edx) techniques. the potentiodynamic study reveals that all studiedcompounds are of mixed type. the adsorption of inhibitors on ms surface was found tofollow the langmuir adsorption isotherm. the weight loss experiment was also performed atdifferent temperature to study the effect of temperature on corrosion rate (cr) and evaluatedsome thermodynamic parameters