Atropine sulphate as corrosion inhibitor for mild steel in sulphuric acid medium

The inhibition of corrosion of mild steel in 1 M sulphuric acid by atropine sulphate (AS) has been investigated using electrochemical, scanning electron microscope (SEM) and Infrared (IR) techniques. The results suggest that AS acts as a good inhibitor and the inhibition efficiency of AS increases with increasing concentration. Potentiodynamic polarization studies have shown that the inhibitor influences both the anodic and cathodic process and it behaves as a mixed type inhibitor. Double layer capacitance and charge transfer resistance values were derived from Nyquist plot obtained from AC impedance studies. The film which is formed over the metal surface is analyzed by IR spectroscopy. Further, surface morphological examination through SEM has also been carried out. The results confirm the role of AS as an effective corrosion inhibitor for MS in acid media.