New Benzohydrazide Derivative as Corrosion Inhibitor for Carbon Steel in a 1.0 M HCl Solution: Electrochemical, DFT and Monte Carlo Simulation Studies

Abstract

The present study aimed to evaluate the inhibition effect of an organic compound, namely, (E)-N'-(2-hydroxybenzylidene)isonicotinohydrazide (BIH), for carbon steel corrosion in a 1.0 M HCl solution, by using weight loss (WL), potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS). Results show that BIH is a good inhibitor, and the percentage of inhibition efficiency increases on its higher concentrations. The maximum inhibition efficiency of 94% was obtained at 5×10-3 M. Polarization studies revealed that the BIH compound acts as a mixed type inhibitor. EIS showed that increasing the concentration of the inhibitor led to an increase in the charge transfer resistance and a decrease in the double layer capacitance. It was found that the adsorption of this compound obeyed the Langmuir adsorption isotherm. The associated activation energies and thermodynamic parameters of the adsorption process were evaluated and discussed. The temperature effect was studied in the range from 303 to 333 K. In addition, quantum chemical calculations based on the density function theory (DFT) and Monte Carlo simulations were done to support the experimental results.

New 8-Hydroxyquinoline-Bearing Quinoxaline Derivatives as Effective Corrosion Inhibitors for Mild Steel in HCl: Electrochemical and Computational Investigations

“…The fitting results obtained by Langmuir adsorption isotherm model are displayed in Figure S5 (Supplementary Material). Looking at the fitted plots presented in Figure S5, it can be seen that the greatest fit was identified for the Langmuir adsorption isotherm model delineated by the following equation [47]:…”

Adsorption and Corrosion Inhibition Properties of Butanolic Extract of Elaeoselinum thapsioides and Its Synergistic Effect with Reutera lutea (Desf.) Maires (Apiaceae) on A283 carbon Steel in Hydrochloric Acid Solution

“…In order to know more about the change may occur on the metal surface such as rapid etching, desorption of inhibitor molecule, the temperature effect was performed [36]. From Fig.…”

Free fatty acid influenced corrosion inhibition mechanisms of some inedible plants seeds oils on low alloyed medium-carbon steel in H2SO4

“…Therefore, this affirms the fact that at 0.01 g/mL of SOJ, the metal sample may be susceptible to more corrosive attack consequent to low inhibitor concentration below critical value (Dariva and Galio, 2014). Decreased double layer capacitance “C dl ” with increasing oil concentrations is attributable to decline in the local dielectric constant which may also be interpreted as gain in thickness of electrical double layer resulting from surface assimilation of oil molecules at interface between steel and corrosive medium (Chaouiki et al , 2019). Increases in impedances and phase angles are definitions of enhanced capacitive action of the exposed LAMCS surface area in corrosive environment on accession of each oil sample, retarding charge transfer process.…”

“…The EIS produced Nyquist and Bode plots fitted to most suitable of the equivalent circuits (EC), Figure 1(a) and 1(b) for uninhibited and inhibited solution respectively (Adesusi et al , 2020) where the composition of Figure 1(b) accounted for protective oxide layer developed with the addition of inhibitors. Double layer capacitance and inhibition efficiencies from EIS have been evaluated in accordance with equations (5) (Chaouiki et al , 2019) and (6) (Abbasov et al , 2014), respectively: …”