Anti corrosive activity of Pulicaria mauritanica essential oil from the oasis of Tata against the corrosion of mild steel in 0.5 M H2SO4

Pulicaria mauritanica essential oils (EOs) obtained by hydrodistillation was tested as corrosion inhibitor of mild steel in 0.5 M H2SO4 using weight loss measurements, electrochemical polarization and EIS methods. The inhibition efficiency was found to increase with EOs concentration to attain 95.08% at 2g/L. Polarization curves revealed that this P. mauritanica EOs act as mixed type inhibitor with a strong predominance of cathodic character. The adsorption of inhibitor onto the mild steel surface was found to be a spontaneous process and to follow the Langmuir adsorption isotherm. The results obtained showed that the P. mauritanica EOs could serve as an effective inhibitor of the corrosion of mild steel in sulfuric acid media