Abstract
The objective of this study was to determine the effect of junipers extract (JE) on the corrosion of C38 steel in 1M HCl solution. The corrosion rate and mechanism were determined with the use of Tafel slopes, mass loss method and electrochemical impedance spectroscopy (EIS). The results showed that the inhibition efficiency increases with the increase of junipers extract (JE) concentration. Potentiodynamic polarization curves indicated that junipers extract (JE) as mixed type inhibitor. The effect of temperature on the inhibition efficiency was studied. The semicircles tended to open at lower frequencies in the Nyquist plots which indicates the rupture of the protective film. The adsorption follows Langmuir adsorption isotherm.