Corrosion Inhibition of Aluminum in Hydrochloric Acid Medium by Essential Oil of Eucalyptus camaldulensis and Myrtus Communis

The action of inhibition of the essential oil of Eucalyptus camaldulensis and Myrtus Communis on aluminum corrosion in a 1 M HCL solution in a temperature range of 288 to 318 K was measured using the methods of the polarizing Potentiodynamic and Spectroscopy of Electrochemical impedance. The acquired results prove that the both oils prevents the corrosion of aluminum in solution of 1M HCL and that the efficiency of the inhibition increases by the augment of the concentration of the oils to attain 88.43% for Eucalyptus oil and 89.06% for Myrtle oil at 1000 ppm, as well as decreases proportionally by the augment of the temperature. Potentiodynamic polarization studies show that the inhibitors are anodic. The values of dissolution kinetics were studied. The results obtained showed that the essential oil of E. camaldulensis and M. Communis (Myrtaceae), might serve as effective inhibitors of the corrosion of aluminum in hydrochloric acid solution.