Experimental, Statistical Modelling and Molecular Dynamics Simulation Concept of Sapium ellipticum Leaf Extract as Corrosion Inhibitor for Carbon Steel in Acid Environment

Okafor, Chizoba Sandra; Anadebe, Valentine Chikaodili; Onukwuli, Okechukwu Dominic

doi:10.17159/0379-4350/2019/v72a22

Cited by 17 publications

(8 citation statements)

References 36 publications

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“…9a). [62][63] The characteristics of the 3-D plots (Fig. 9b-e) showed that there is good coordination among the factors of the corrosion inhibition process.…”

Section: Results Of Weight-loss Methods Using Response Surface Methodologymentioning

confidence: 99%

Evaluation of Bitter Kola Leaf Extract as an Anticorrosion Additive for Mild Steel in 1.2 M H2SO4 Electrolyte

Anadebe¹,

Nnaji

Okafor

et al. 2021

S.Afr.j.chem.

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Plant-based material, namely bitter kola leaf, as an additive for surface modification of mild steel in H 2 SO 4 solution was thoroughly scrutinized using electrochemical, theoretical and optimization techniques. The functional groups, of the biomolecules of the bitter kola leaf extract, were examined using Fourier transform infrared spectrometry (FTIR) and gas chromatography-mass spectrophotometry (GC-MS). For clarification purpose, scanning electron microscopy (SEM) was used to inspect the texture of the degraded and inhibited steel after 21 h of immersion. For the response surface methodology (RSM), central composite design of Design-Expert Software was used to optimize the inhibition efficiency as a function of acid concentration, inhibitor concentration, temperature and time. The optimum inhibition efficiency of 93 % was obtained at 0.9 g L -1 bitter kola leaf. The mutual correlation between the considered variables and expected response was adequately interpreted by a quadratic model. The fitness of the model was justified by the following standards which include P-value (<0.0001), adjusted R 2 (0.9843), R 2 (0.991), adequate precision (43.14) and coefficient of variation (2.59). Bitter kola leaf extract behaved as a mixed-type inhibitor and adequately satisfied Langmuir adsorption isotherm. Furthermore, the theoretical modelling revealed the most active molecule of bitter kola leaf responsible for the overall inhibition. The experimental and theoretical results are in agreement that bitter kola leaf extract is a viable corrosion inhibitor of mild steel in H 2 SO 4 solution.

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“…9a). [62][63] The characteristics of the 3-D plots (Fig. 9b-e) showed that there is good coordination among the factors of the corrosion inhibition process.…”

Section: Results Of Weight-loss Methods Using Response Surface Methodologymentioning

confidence: 99%

Evaluation of Bitter Kola Leaf Extract as an Anticorrosion Additive for Mild Steel in 1.2 M H2SO4 Electrolyte

Anadebe¹,

Nnaji

Okafor

et al. 2021

S.Afr.j.chem.

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“…The authors have cited additional references within the Supporting Information. [50][51][52][53][54][55][56][57][58][59] The supporting information contains the experimental details, including some experimental methods and preliminary work. It contains: synthesis method of scale inhibitor, scale inhibition performance method, characterization method, simulation model construction, etc.…”

Section: Discussionmentioning

confidence: 99%

Synthesis, Performance and Mechanism of an Anionic Scale Inhibitor in a Salt System

Luo,

Sun,

Wang

et al. 2023

ChemistrySelect

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A novel non‐phosphorus and non‐nitrogen scale inhibitor IA‐HEMA was synthesized in the presence of only C, H and O using itaconic acid (IA) and 2‐hydroxyethyl methacrylate (HEMA) as the raw materials and hydrogen peroxide‐ascorbic acid (H2O2‐ASA) as the initiating system. The synthesis conditions were optimized with the response surface method (RSM). The results indicated that the material ratio had the largest effect on the scale inhibition rate, followed by initiator dosage, polymerization temperature and polymerization time successively. As demonstrated by the static scale inhibition experiment, the scale inhibition rate was 97.27 % when the IA‐HEMA concentration was 100 mg/L. The mechanism was explored by molecular dynamics (MD). The results indicated that IA‐HEMA was able to overcome its own distortion and adsorb on the crystal surface, and the scale inhibition performance was related to its chelating and lattice‐distortion ability, which effectively inhibited the formation and precipitation of scale. All these findings suggest that IA‐HEMA is a quite promising environmentally friendly scale inhibitor in the salt system.

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“…The successful use of naturally occurring substances to inhibit the corrosion of metals in acidic middle has been reported by some research groups (Ayeni et al, 2014;Onukwuli & Omotioma, 2016;Onukwuli et al, 2017;Okafor, Anadebe & Onukwuli, 2019;Anadebe et al, 2018;Gomes, 1999). Efforts to find natural organic substances or biodegradable organic materials to be used as corrosion inhibitors over the years have been intensified in the world.…”

Section: Introductionmentioning

confidence: 94%

Evaluation of vegetables residues as corrosion inhibitors

Barreto

Almeida

Santos

et al. 2021

RSD

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This work investigates the use of (Allium sativum L.) garlic peel extract, and (Theobroma L) cacao peel, as well as their synergy as a corrosion inhibitor for carbon steel in 0.5 mol.L-1 hydrochloric acid solution. The comparative study was performed in 1.11 g.L-1 of extract. The investigation was carried out using Fourier transform infrared spectroscopy (FTIR), electrochemical impedance spectroscopy (EIS), gravimetric techniques and scanning electron microscopy (SEM) as chemical, electrochemical and morphological characterization techniques, respectively. Gravimetric tests results showed a reduction in the corrosion rate of the extracts, with 90.7% efficiency for garlic extract and 89% for cacao extract, however, the mixture of the compounds presented an inhibition superior to 98%, showing the great synergism between the studied species. While the EIS results showed a higher impedance module value for cacao extract compared to garlic extract. Chemical analysis for extracts of garlic and cacao obtained by FTIR showed the presence of compounds based on sulfur and nitrogen, which are responsible for corrosion inhibiting effect. The SEM images obtained showed the formation of a film which reduces the evaluation of the corrosive process. Then, it is possible to conclude, that the carbon steel surface immersed in 0.5 mol.L-1 HCl solution with garlic peel extracts or cacao peel extracts or both, presents a corrosion inhibiting effect.

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Experimental, Statistical Modelling and Molecular Dynamics Simulation Concept of Sapium ellipticum Leaf Extract as Corrosion Inhibitor for Carbon Steel in Acid Environment

Cited by 17 publications

References 36 publications

Evaluation of Bitter Kola Leaf Extract as an Anticorrosion Additive for Mild Steel in 1.2 M H2SO4 Electrolyte

Evaluation of Bitter Kola Leaf Extract as an Anticorrosion Additive for Mild Steel in 1.2 M H2SO4 Electrolyte

Synthesis, Performance and Mechanism of an Anionic Scale Inhibitor in a Salt System

Evaluation of vegetables residues as corrosion inhibitors

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