Effect of Ceftezole on the Corrosion of Mild Steel in HCl Solution

The adsorption and corrosion inhibition behaviour of ceftezole (CFZ) at mild steel surface were studied gravimetrically and electrochemically by using electrochemical impedance spectroscopy (EIS) and Tafel polarization techniques. The increase in concentration, immersion time and temperature shows a positive effect on inhibition efficiency. Inhibitor molecules directly adsorb on the surface on the basis of donor acceptor interactions between the p-electrons of benzene, sulphur and nitrogen atoms and the vacant d-orbitals of iron atoms. The adsorption of CFZ followed Langmuir adsorption isotherm. Potentiodynamic polarization study revealed that CFZ acted as mixed type of inhibitor. The results obtained from different methods are in good agreement.