Green ultrasound assisted synthesis of N²,N⁴,N⁶-tris ((pyridin-2-ylamino) methyl)-1, 3,5-triazine-2,4,6-triamine as effective corrosion inhibitor for mild steel in 1 M hydrochloric acid medium

An new corrosion inhibitor namely N²,N⁴,N⁶-tris ((Pyridin-2-ylamino) methyl)-1, 3,5-triazine-2,4,6-triamine (INH) was synthesized using green ultrasound technique and its inhibition property on corrosion of mild steel has been studied using gravimetric measurement, Potentiodynamic polarization , electrochemical impedance spectroscopy (EIS) and linear polarization (LR) resistance . Potentiodynamic polarization measurements reveal that this compound effectively suppressed corrosion of mild steel in acid solution and acts as mixed-type inhibitor. EIS plots indicates that the addition of inhibitor increases the charge-transfer resistance (R_ct) and decreases the double-layer capacitance (C_dl) of the corrosion process this reveals that investigated inhibitor inhibits mild steel corrosion by adsorption on its surface. The adsorption of inhibitor on the mild steel surface obeys Langmuir adsorption isotherm.