Studies of Some Aromatic Compounds for Corrosion Inhibition of Aluminum in Acidic Medium

The aim of this work is to investigate corrosion inhibition characteristics of Aluminum in Hydrochloric acid (0.1N) in presence of different concentration(0.2, 0.4% and 0.6%) of two inhibitors namely p-Nitrophenol and Nitrobenzene using Tafel polarization studies and weight loss methods. Open circuit potential, inhibition efficiency, corrosion current and corrosion rate have been determined in the absence and presence of inhibitors at different concentrations such as 0.2, 0.4% and 0.6%. It is observed that the inhibition increases with the increase in concentration of the inhibitors in acidic media. The experimental data showed that the maximum inhibition performance could reach about 72-78% at the concentration of 0.6%. The inhibition efficiency of the p-Nitrophenol is found to be higher than that of Nitrobenzene.