The corrosion inhibition of Pistachio Essential Oils (PEO) on carbon steel in 0.5 M H₂SO₄ was investigated by weight loss, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). Results showed that PEO inhibited carbon steel corrosion in a 0.5 M H₂SO₄ solution and indicated that the inhibition efficiencies increased with the concentration of inhibitor. Potentiodynamic polarization studies suggested that this inhibitor is a mixed type inhibitor with predominance anodic type. Nyquist plots indicated that the addition of inhibitor decreases the double-layer capacitance (C_dl) of the corrosion process depressed semicircles with their centre below real axis. The PEO adsorption on the carbon steel surface followed the Langmuir adsorption isotherm. © 2015 The Authors.

Title

International Journal of Electrochemical Science

Publisher

Electrochemical Science Group

Publisher Country

Serbia

Indexing

Thomson Reuters

Impact Factor

1.369

Publication Type

Prtinted only

Volume

10

Year

2015

Pages

8403-8411