Aerva lanata flowers extract as green corrosion inhibitor of low-carbon steel in HCl solution: an in vitro study

Hynes, N. Rajesh Jesudoss; Selvaraj, Rengaraj; Tezeghdenti, Mohamed; Mukesh, A. M.; Kanoun, Olfa; Nikolova, Maria P.

doi:10.1007/s11696-020-01361-5

Cited by 47 publications

(10 citation statements)

References 54 publications

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“…After the immersion the carbon steel is removed from various test solution, thoroughly washed with double distilled water, dried well and weighted accurately again. From the average weight-loss, the inhibition efficiency (32) and corrosion rate (33)(34)(35) are calculated using the following equations.…”

Section: Weight Loss Studymentioning

confidence: 99%

“…The damage of the steel surface has diminished in the presence of the inhibitor and rough, corroded steel surface displaces to much smooth (64) . This is due to the covering of metal surface with a protective layer (35) . The scanning electron microscope images for metal surface are investigated (51,(65)(66)(67)(68) .…”

Section: Scanning Electron Microscopy Techniquementioning

confidence: 99%

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Corrosion inhibition behaviour on carbon steel in well-water by Ethanolic extract of Portulaca quadrifida (Chicken weed) leaves

Thirupathi¹,

Venkatraman²

2021

IJST

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Objectives: To evaluate the corrosion inhibition of an ethanolic extract of Portulaca quadrifida (PQ) leaves on the carbon steel surface in well-water by using a weight-loss study with various immersion periods, temperatures, and pH. The kinetic and thermodynamic parameters are calculated for various temperatures. Methods: The protective film has been analyzed by using SEM, EDX and AFM studies. The inhibition action of PQ extract was analyzed by potentiodynamic polarization study, the electrochemical impedance studies are used to the analysis the protective layer formed on the carbon steel surface. Findings: The maximum inhibition efficiency is found to be 92% for 500ppm of PQ and 30ppm of Zn 2+ ions at 303K. The synergistic effect exists between ethanolic extract of Portulaca quadrifida leaves and Zn 2+ ions by synergistic parameters. The ethanolic extract of PQ leaves acts as a mixed-type inhibitor. The activation energy (E a ) values indicate that the adsorption of PQ leaves extract on the carbon steel surface. The enthalpy of adsorption (∆H) values suggests that the reaction is endothermic. The free energy of adsorption (∆G ads ) values is negative and less than the -20KJmol -1 . The negative values of ∆S ads are confirmed to form an ordered stable layer of the inhibitor molecule on the carbon steel surface as well as a stable equilibrium between the adsorption and desorption processes. The adsorption isotherm is best fitted with the Langmuir model. Novelty: The ∆G ads values indicate that the adsorption of inhibitor on the carbon steel surface belongs to the physisorption as well as the adsorption layer has an electrostatic character. The adsorption process of the inhibitor is spontaneous. The thermodynamic parameters give a strong interaction between the inhibitor molecules and carbon steel surface. Four adsorption isotherms including Langmuir, El-Awady, Flory-Huggins, and Temkin models, investigate the mode of inhibition of PQ leaves extract.

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Section: Weight Loss Studymentioning

confidence: 99%

Section: Scanning Electron Microscopy Techniquementioning

confidence: 99%

Corrosion inhibition behaviour on carbon steel in well-water by Ethanolic extract of Portulaca quadrifida (Chicken weed) leaves

Thirupathi¹,

Venkatraman²

2021

IJST

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“…CS was immersed in well water with various concentrations of AO leaves at 303K. After one day of immersion, CS samples were collected, washed with tap water, dried and gauged to determine the IE (27,28) and CR (28)(29)(30) using the following equations:…”

Section: Determination Of Ie and Crmentioning

confidence: 99%

“…Langmuir (29,31,50,53,58) , Flory-Huggins (30,62,63) , EL-Awady (30,63,66) and Temkin (30,61,63) isotherms are expressed by following equations.…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Corrosion inhibition and thermodynamic studies on carbon steel in well water by ethanolic extract of Alpinia officinarum leaves (Lesser galangal)-Zn2+

Thirupathi¹,

Venkatraman²

2021

IJST

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“…The essential organic molecules containing heteroatom like sulfur, oxygen, nitrogen, etc., exhibit inhibiting action which is mainly referring to their adsorption on the surface of the metal (Branzoi et al 2020;El Faydy et al 2020;Mahgoub et al 2010;Tabatabaei majd, 2020). Moreover, the latest development in the protection of the surface of the metal is using nontoxic inhibitors (Galo et al 2020;Hoai et al 2019;Hynes et al 2021;Manssouri et al 2021;Negm et al 2011;Pais and Rao 2021;Şahin et al 2020). Saxena et al have assessed the inhibition action of Citrus sinensis extract on C-steel corrosion in 0.5 M H 2 SO 4 (Saxena et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Chemical, electrochemical, thermodynamic and adsorption study of EN8 dual-phase steel with ferrite-martensite structure in 0.5 M H2SO4 using pectin as inhibitor

et al. 2021

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This paper presents the corrosion and inhibition behavior of heat-treated EN8 dual-phase steel with ferrite-martensite structure with pectin in 0.5 M sulphuric acid. The corrosion studies were performed using the weight loss method, electrochemical techniques such as potentiodynamic polarization measurements, and impedance spectroscopy. The study was done at different concentrations of pectin in the temperature range of 40 to 70 °C and immersion time of 1, 3, 5, and 7 h. The results showed that the inhibition performance of pectin has enhanced with an increase in pectin concentration and decreased with the temperature and time of exposure. From the weight loss study, highest inhibition efficiency of 76.43% was achieved at 5.0 g/L at 1 h of exposure at 40 °C. The maximum inhibition efficiency of 62% was obtained with 5.0 g/L of pectin at 40 °C by potentiodynamic polarization method. The energy, enthalpy, and entropy of activation and also thermodynamic parameters like free energy, enthalpy, and entropy of adsorption were assessed and discussed. Appropriate adsorption isotherm was fit to the obtained experimental outcomes and achieved Langmuir adsorption isotherm to be the best fit and obeyed physical adsorption. Surface analysis: scanning electron microscopy, X-ray diffraction techniques, atomic force microscopy, and energy dispersive X-ray were done with and without the addition of pectin. The metal surface appears to be uniform and smooth in the presence of pectin and adsorption was confirmed by surface analysis.

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Aerva lanata flowers extract as green corrosion inhibitor of low-carbon steel in HCl solution: an in vitro study

Cited by 47 publications

References 54 publications

Corrosion inhibition behaviour on carbon steel in well-water by Ethanolic extract of Portulaca quadrifida (Chicken weed) leaves

Corrosion inhibition behaviour on carbon steel in well-water by Ethanolic extract of Portulaca quadrifida (Chicken weed) leaves

Corrosion inhibition and thermodynamic studies on carbon steel in well water by ethanolic extract of Alpinia officinarum leaves (Lesser galangal)-Zn2+

Chemical, electrochemical, thermodynamic and adsorption study of EN8 dual-phase steel with ferrite-martensite structure in 0.5 M H2SO4 using pectin as inhibitor

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