Experimental and Theoretical Investigations of Anti-Corrosive Properties of Thymol

Vorobyova, Viktoria; Chygyrynets, Оlena; Скіба, Маргарита; Overchenko, Tetyana

doi:10.23939/chcht13.02.261

Cited by 5 publications

(6 citation statements)

References 22 publications

(30 reference statements)

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“…These band shifts confirm that the green inhibitor chemically and/or physically interacts with the metal surface [38,39]. The intense band at 1752 cm -1 appeared is characteristic of ν (C=C) groups maybe corresponding to new groups of compounds (dimeric and trimeric polymer adducts) [10,34]. This indicates the possible chemical change of the main compounds of APE once adsorbed on the mild steel surface and explains the highest protection values that achieved only in 48 h. Thus the anticorrosion properties of apricot cake extract cannot be explained only by the antioxidant properties of the molecules contained in these extract [41,42].…”

Section: Resultssupporting

confidence: 54%

“…This result indicates that APE contains different classes of organic substances in their composition, which can act as corrosion inhibitors. [33,34]. The effect of 2-phenylacetaldehyde and hexanal on the corrosion behavior of steel was studied [35] through weight loss, electrochemical, SEM, AFM, quantum chemical calculation methods.…”

Section: Resultsmentioning

confidence: 99%

“…It was found that the inhibition effect of 2-phenylacetaldehyde was associated with layerby-layer mechanism formation of a protective film. Interestingly, the electrochemical and spectroscopic studies have revealed that unsaturated aldehydes (2-phenylacetaldehyde) and phenolic compounds (thymol and carvacrol) can polymerize on metallic surfaces and show excellent corrosion protection [33][34][35]. The antioxidant activity of the extract was analyzed in several methods because the evaluation of antioxidant properties of plants cannot be carried out accurately by a single universal method.…”

Section: Resultsmentioning

confidence: 99%

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Apricot pomaces extract (Prunus Armeniaca L.) as a highly efficient sustainable corrosion inhibitor for mild steel in sodium chloride solution

Vorobyova¹,

Скіба²,

Трус³

2019

Int. J. Corros. Scale Inhib.

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The present study was carried out to identify the components present in the ethanol apricot pomace extract by GC-MS analysis. Various experimental models including iron(III) reducing capacity, total antioxidant capacity, DPPH radical scavenging activity were used for characterization of antioxidant activity of the extract. Weight loss investigation, potentiodynamic polarization, and FTIR techniques were used to study the corrosion inhibition. The maximum inhibition efficiency of 94.6% was achieved by using 500 ppm of the inhibitor. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) analysis were used to characterize the protective film. AFM also illustrated an improvement in the surface properties of the samples in the presence of APE. The influence of the immersion period on inhibition efficiency was evaluated. The GC-MS experimental results show that the major compounds of the APE are 3,4,5trihydroxybenzoic acid, chlorogenic acid, 3-(3,4-dihydroxyphenyl)-2-propenoic acid, 2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxy-4H-chromen-4-one, and catechin. The results revealed that in the attendance of the APE and with the immersion time progress up to 48 h, the inhibition capacity of inhibitor was promoted.The mechanism of action of the inhibitor is also discussed. Quantum chemical parameters calculated for the molecules contained in the aqueous extract are interpreted to predict the corrosion inhibition efficiency of the considered extract. The theoretical study gave insights to the active sites, chemical reactivity and possible interaction mechanism between the inhibitor compounds and mild steel surface. The apricot pomace extract studied in this work are potential multifunctional inhibition materials as they showed good antioxidant and anticorrosion properties.

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Section: Resultssupporting

confidence: 54%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Apricot pomaces extract (Prunus Armeniaca L.) as a highly efficient sustainable corrosion inhibitor for mild steel in sodium chloride solution

Vorobyova¹,

Скіба²,

Трус³

2019

Int. J. Corros. Scale Inhib.

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“…Next, maxima observed at 2973 cm −1 and 2882 cm −1 could be assigned to -CH groups [ 2 ]. Additionally, peaks at 1531 cm −1 and 1379 cm −1 were visible due to the presence of phenyl aromatic rings and absorption bands between 1268 and 1087 cm −1 , which could be related to C-O, C-O-C ester, ether, or ketone linkages [ 2 , 54 ]. Moreover, the peak visible at 879 cm −1 is probably another signal from -CH moieties [ 2 ].…”

Section: Resultsmentioning

confidence: 99%

Comparison of Aging Resistance and Antimicrobial Properties of Ethylene–Norbornene Copolymer and Poly(Lactic Acid) Impregnated with Phytochemicals Embodied in Thyme (Thymus vulgaris) and Clove (Syzygium aromaticum)

Masek

Cichosz

Piotrowska³

2021

IJMS

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The effects of plant-based extracts on the solar aging and antimicrobial properties of impregnated ethylene–norbornene (EN) copolymer and poly(lactic acid) (PLA) were investigated. In this study, the impregnation yield of polyolefin, lacking in active centers capable of phytochemical bonding, and polyester, abundant in active sides, was measured. Moreover, two different extracts plentiful in phytochemicals—thyme (TE) and clove (CE)—were employed in the solvent-based impregnation process. The effect of thymol and eugenol, the two main compounds embodied in the extracts, was studied as well. Interestingly, oxidation induction times (OIT) for the impregnation of EN with thyme and clove extracts were established to be, respectively, 27.7 and 39.02 min, which are higher than for thymol (18.4 min) and eugenol (21.1 min). Therefore, an aging experiment, mimicking the full spectrum of sunlight, was carried out to investigate the resistance to common radiation of materials impregnated with antioxidative substances. As expected, the experiment revealed that the natural extracts increased the shelf-life of the polymer matrix by inhibiting the degradation processes. The aging resistance was assessed based on detected changes in the materials’ behavior and structure that were examined with Fourier-transform infrared spectroscopy, contact angle measurements, color quantification, tensile tests, and hardness investigation. Such broad results of solar aging regarding materials impregnated with thyme and clove extracts have not been reported to date. Moreover, CE was found to be the most effective modifying agent for enabling material with antimicrobial activity against Escherichia coli to be obtained.

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“…Molecular modeling calculation was accomplished in the Dmol3 module available in Material Studio (MS) software from Accelrys Inc. [22][23][24] using an optimization procedure incorporating a COMPASS force field, a Perdew-Wang (PW) functional 25 a double numeric quality basis set (DND) and a smart minimization method with high convergence. The distribution of frontier molecular orbitals including the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) were obtained from this optimized structure.…”

Section: Computational Studymentioning

confidence: 99%

Adsorption and Inhibitory Properties of Buchholzia coriacea Seed Extracts on Mild Steel Corrosion in Acidic Media

2021

TJNPR

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However, due to increasing awareness of the toxic properties of most organic corrosion inhibitor compounds in current use, and the accompanying ecological and health risks, researchers are moving towards exploring more environmentally friendly inhibitor sources. [2][3][4][5][6] Available data, points towards plant extracts as the most acceptable candidate in this transition. Plants extracts are not only environmentally safe and available; they are equally effective under a wide range of corrosion environments having similar chemical composition with conventional corrosion inhibitors. [7][8][9][10][11][12][13][14] Despite the sustained interest in the use of organic extracts for corrosion protection, a major challenge has been that of deducing the detailed mechanisms of the inhibition process and determining the individual contributions of the many constituents to the total inhibiting effect of the extracts. The intricate chemical compositions of the extracts, makes it difficult to allocate the inhibition activity to any specific constituent. A novel approach developed by Oguzie and Co-Workers (2010) 15 involves evaluation of the elucidated molecular structures of the phytochemical constituents of the extracts by computer simulations of suitable models based on the Density Functional Theory (DFT). This enables theoretical assessment of corrosion inhibiting potential based on certain structure-activity relationships (SAR) to estimate basic quantum chemical/molecular descriptors identifiable with corrosion inhibition performance. Buchholzia coriacea, belonging to the family Capparidaceae is an evergreen, small to medium-sized tree growing up to 20 m tall commonly found in the rain forest zones of Africa especially Cameroon, Central African Republic, Gabon, Congo, Angola, Ghana, Nigeria, among others. The fruits of Buchholzia coriacea are oval, resembling avocado pears, with a thick and woody endocarp, yellowish when ripe; containing a

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Experimental and Theoretical Investigations of Anti-Corrosive Properties of Thymol

Cited by 5 publications

References 22 publications

Apricot pomaces extract (Prunus Armeniaca L.) as a highly efficient sustainable corrosion inhibitor for mild steel in sodium chloride solution

Apricot pomaces extract (Prunus Armeniaca L.) as a highly efficient sustainable corrosion inhibitor for mild steel in sodium chloride solution

Comparison of Aging Resistance and Antimicrobial Properties of Ethylene–Norbornene Copolymer and Poly(Lactic Acid) Impregnated with Phytochemicals Embodied in Thyme (Thymus vulgaris) and Clove (Syzygium aromaticum)

Adsorption and Inhibitory Properties of Buchholzia coriacea Seed Extracts on Mild Steel Corrosion in Acidic Media

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