Volume : 2, Issue : 2, February - 2013

Study on the Corrosion Inhibition of Mild Steel by Phosphono and Benzotriazole Derivative in Ground Water Media

Dr. V. Manivannan

Abstract :

Corrosion inhibition by benzotriazole derivative 1–(2– pyrrolecarbonyl)benzotriazole (PCBT) and phosphono derivative 2–Phosphonoacetic acid (2–PAA) on mild steel in ground water media has been investigated by weight loss method, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and atomic absorption spectroscopy(AAS) method. The experimental results obtained reveal that among the two inhibitors PCBT is the best effective inhibitor than 2–PAA. The variation in inhibitive efficiency mainly depends on the type and nature of the substituent present in the inhibitor molecule. Inhibition efficiency (IE %) values obtained from various methods used are in good agreement.