Inhibitory effect of Atlas cedar essential oil on the corrosion of steel in 1 m HCl

Abstract

The inhibition efficiency of Atlas cedar essential oil (ACEO) as a green corrosion inhibitor on steel in 1 m hydrochloric acidic was studied. The effects of temperature and the concentration of the ACEO inhibitor on the inhibition efficiency were studied. Potentiodynamic polarization and electrochemical impedance spectroscopy were used to test the performance of the inhibitor. We found that the inhibition efficiency of ACEO exceeded 88% at 1 g/l at 298 K and increased with increasing concentration. The evaluation of activation and thermodynamic parameters reveals that the organic molecules of cedar essential oil and its fractions act by chemical adsorption on the metal surface. The adsorption of the inhibitor on the surface of steel is in a good agreement with the Langmuir adsorption isotherm. Increasing concentration of the corrosion inhibitor enhances the surface coverage and formation of a protective film.

Synthesis, Characterization, Theoretical and Electrochemical Studies of Pyrazoline Derivatives

“…Moreover, the corrosion potential (Ecorr) is slightly shifted than the blank (≈15-77 mV), as described in Table 9. In general, an inhibitor is classified as an anodic or a cathodic type if the displacement in corrosion potential (Ecorr) values against the blank is larger than 85 mV 45,46 . In the present study, Ecorr shifted within 85 mV, suggesting the mixed type inhibitor.…”

Inhibitory effect of Senecio anteuphorbium as green corrosion inhibitor for S300 steel

“…Analysis of activation parameters in absence and presence of SA extract gives more insights on the inhibitor adsorption (12) mechanism. The apparent activation energy can be calculated using the Arrhenius famous equation which evaluates the temperature dependency to the corrosion current density:…”

“…Most of the effective inhibitors used in industry contain heteroatoms as oxygen (O), phosphorus (P), sulphur (S), nitrogen (N) or aromatic component having multiple bonds leading to an easier adsorption on the metal surface [7,8]. Recently, several researches have been devoted to corrosion inhibition by plant extracts [9,10], essential oils [11,12] and purified compounds [13], in order to study their properties and the inhibition's mechanisms against steel corrosion. The yield of these corrosion inhibitors, also called "green inhibitors", depends mainly on the parts of plant used and geographical location [1].…”

Experimental and theoretical investigations of benzoic acid derivatives as corrosion inhibitors for AISI 316 stainless steel in hydrochloric acid medium: DFT and Monte Carlo simulations on the Fe (110) surface

“…[7][8][9] The application of stainless steel in aggressive environments is subject to corrosion, which generates huge nancial losses in industrial processes. [10][11][12][13] Therefore, it is essential to nd solutions to the corrosion of materials used in aggressive environments.…”