Experimental, adsorption, quantum chemical and molecular dynamics simulation studies on the corrosion inhibition performance of Vincamine on J55 steel in acidic medium

Iroha, Nkem B.; Madueke, Nancy Ada; Mkpenie, Victor; Ogunyemi, Babatunde Temitope; Nnanna, Lebe A.; Singh, Sneha; Akpan, Ekemini D.; Ebenso, Eno E.

doi:10.1016/j.molstruc.2020.129533

Cited by 38 publications

(15 citation statements)

References 52 publications

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“…The variation in NP extract concentration and inhibition efficiency was used as the input parameters. Table 3 and Figure 4 indicate that the best fittings were obtained for the WM and BM zones by using the Langmuir adsorption isothermal equation [21], while the HAZ fits well with the Freundlich adsorption isothermal equation [22].…”

Section: Adsorption Isotherms Plots Of Np Extracts Adsorption On Carbon Steel Surfacementioning

confidence: 81%

Nephelium lappaceum Extract as an Organic Inhibitor to Control the Corrosion of Carbon Steel Weldment in the Acidic Environment

et al. 2021

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Organic inhibitors have been considered as an effective way to control the corrosion of carbon steel weldment in an acidic environment. This work proposes a new green organic inhibitor made of extract of rambutan fruit (Nephelium lappaceum) peel and aims at analyzing its corrosion inhibitor properties and protection mechanism. Specimens of carbon steel weldment were tested for their corrosion by using electrochemical and immersion methods in 1 M HCl solution containing 0 to 6 g/L of Nephelium peel (NP) extract. Results showed that, in the same solution, the corrosion rate was measured to be higher on the weld metal zone than that of base metal zone, which could be related to the coarser grain of the weld metal zone and the stability of the formed oxide layer. The addition of NP extract was found to increase the stability of the oxide layer, thus increasing the corrosion resistance of the specimens. The maximum inhibition efficiency of the NP extract was reached at 97% for weld metal with 5 g/L of extract, at 80% for the heat affected zone with 5 g/L, and at 70% for base metal with 4 g/L. This work reveals the particularity of different weldment zones to the different needs of inhibitor concentration for obtaining the optimum corrosion protection.

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Section: Adsorption Isotherms Plots Of Np Extracts Adsorption On Carbon Steel Surfacementioning

confidence: 81%

Nephelium lappaceum Extract as an Organic Inhibitor to Control the Corrosion of Carbon Steel Weldment in the Acidic Environment

et al. 2021

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“…On comparing the ∆ E values of compounds A and B it was found that that compound B possesses a low energy gap and hence compound B may support the corrosion inhibition process more effectively than compound A, obviously giving high I.E. [ 38 ] Chemical reactivity of the atoms and molecules of the organic compounds A and B were described with the help of another parameter called ionization energy (I), which is the amount of energy essential to remove electrons from a molecule. It is said that compounds having low ionization energy are efficient in corrosion inhibition, as it helps for the good reactivity of atoms and molecules with the MS surface.…”

Section: Resultsmentioning

confidence: 99%

Assessing bioorganic gum performance as a corrosion inhibitor in phosphoric acid medium: Electrochemical and computational analysis

Sathiyapriya¹,

Dhayalan²,

Jagadeeswari

et al. 2021

Materials & Corrosion

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The present investigation was aimed at exploring the anticorrosive behavior of bio‐organic Auraucaria heterophylla gum exudate (AHGE) on mild steel (MS) corrosion in 1 M phosphoric acid solution by weight loss technique, electrochemical studies, and computational analysis. Additionally, the performance was analyzed by morphological and quantum chemical analyses. The weight loss data revealed that AHGE showed 80% of inhibition efficiency at 303 K temperature. Inhibitor adsorption on MS was in line with Langmuir and Tempkin adsorption isotherms. Potentiodynamic studies showed that the investigated AHGE performed as a mixed‐type inhibitor. Electrochemical parameters like charge transfer resistance, double‐layer capacitance, and inhibition efficiency were determined and presented. Results obtained through computational analysis, scanning electron microscopy/energy dispersive X‐ray analysis, and atomic force microscopy studies were well supported by the inhibitive potential of AHGE.

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“…6b-c) of HBPA and B-HBPA can be associated with reduction in surface inhomogeneities and fractal geometry due to adsorption of the pyridine compounds and energy distribution in the film layer [34]. More so, C dl values decreased with increase in HBPA and B-HBPA concentrations probably due to the process of H 2 O molecules replacement by inhibitors molecules on the steel-solution interface [35,36]. Again, according to Helmholtz model, C dl reduction in the presence of inhibitors is inversely proportional to the double-layer thickness, δ, Eq.…”

Section: Electrochemical Impedance Spectroscopy (Eis)mentioning

confidence: 99%

Anticorrosion activity of two new pyridine derivatives in protecting X70 pipeline steel in oil well acidizing fluid: experimental and quantum chemical studies

et al. 2021

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The effectiveness of two new pyridine derivatives, namely N-(2-hydroxybenzylidene) pyridine-4-amine (HBPA) and N-(5-bromo-2-hydroxybenzylidene) pyridine-4-amine (B-HBPA) as corrosion inhibitors for X70 steel in 2 M HCl solution was examined using weight loss, electrochemical and quantum chemical calculations. The results from the experimental studies indicate that the two pyridine derivatives inhibited X70 steel corrosion in the acid environment with HBPA displaying superiority in the inhibition performance. The inhibition efficiency from the polarization studies gave 96 and 92% for HBPA and B-HBPA, respectively; it also indicated that HBPA and B-HBPA behaved as a mixed-type inhibitor with predominant cathodic effect with HBPA inhibitor. Data from electrochemical impedance gave efficiency of 95 and 94% for HBPA and B-HBPA, respectively, at maximum inhibitor concentrations. The inhibitors adsorption on X70 steel surface obeyed Langmuir adsorption isotherm. The inhibitive effect of the studied inhibitors was confirmed by scanning electron microscopy (SEM) analysis. Quantum chemical calculations studied via density functional theory (DFT) provided additional support for better understanding of the mechanism of corrosion inhibition displayed by the studied pyridine derivatives.

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Experimental, adsorption, quantum chemical and molecular dynamics simulation studies on the corrosion inhibition performance of Vincamine on J55 steel in acidic medium

Cited by 38 publications

References 52 publications

Nephelium lappaceum Extract as an Organic Inhibitor to Control the Corrosion of Carbon Steel Weldment in the Acidic Environment

Nephelium lappaceum Extract as an Organic Inhibitor to Control the Corrosion of Carbon Steel Weldment in the Acidic Environment

Assessing bioorganic gum performance as a corrosion inhibitor in phosphoric acid medium: Electrochemical and computational analysis

Anticorrosion activity of two new pyridine derivatives in protecting X70 pipeline steel in oil well acidizing fluid: experimental and quantum chemical studies

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