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- Title
Adsorption and corrosion inhibition of mild steel in hydrochloric acid solution by verbena essential oil.
- Authors
Hmamou, Dris; Salghi, Rachid; Zarrouk, Abdelkader; Zarrouk, Hassan; Errami, Mohamed; Hammouti, Belkheir; Afia, Laila; Bazzi, Lhoucine; Bazzi, Lahcen
- Abstract
The inhibitive action of verbena essential oil (VEO) on the corrosion of mild Steel in 1 M HCl solutions in the temperature range 298 to 328 K was measured by use of the weight-loss method, potentiodynamic polarization, and electrochemical impedance spectroscopy. Results showed that VEO inhibited corrosion of C38 steel in 1 M HCl solution and that inhibition efficiency increased with increasing concentration of inhibitor but decreased proportionally with temperature. Potentiodynamic polarization studies suggested VEO is a mixed-type inhibitor, with the anodic type predominating. Nyquist plots were depressed semicircles with their centre below the real axis. Adsorption of VEO by the C38 steel surface followed the Langmuir adsorption isotherm. Kinetic data for dissolution were investigated.
- Subjects
ADSORPTION (Chemistry); CORROSION &; anti-corrosives; MILD steel; HYDROCHLORIC acid; SOLUTION (Chemistry); VERBENA; ESSENTIAL oils
- Publication
Research on Chemical Intermediates, 2013, Vol 39, Issue 3, p973
- ISSN
0922-6168
- Publication type
Article
- DOI
10.1007/s11164-012-0609-7