Electrochemical and computational aspects of surface interaction and corrosion inhibition of mild steel in hydrochloric acid by Phyllanthus amarus leaf extract (PAE)

Anupama, K.K.; Ramya, K.; Joseph, Abraham

doi:10.1016/j.molliq.2016.01.019

Cited by 132 publications

(30 citation statements)

References 54 publications

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“…In recent years, plant extracts as corrosion inhibitors attracted great attention due to their properties like low cost, environment-suitability, renewability and also due to the cost e ectiveness and simplicity of the methods utilized during the extraction of these plants [18]. In this context, the literature review reveals that exclusive and extensive works have been done in the research areas related to plant leaves, bark, and stem as corrosion inhibitors for steel in HCl medium like Ylang-ylang [19], Kimbiolongo [20], Carvi [21], Nypa fruticans Wurmb [22], Osmanthus fragran [23], Phyllanthus amarus [24], Tabernaemontana divaricata [25], Pimenta dioica [24], Bryophyllum Pinnatum [26]. Furthermore, the existing literature discovered that adsorption of corrosion inhibitors takes place through adsorptive interactions between concerned compounds and metal surface.…”

Section: Introductionmentioning

confidence: 99%

Inhibition of Mild Steel Corrosion in 1M Hydrochloric Medium by the Methanolic Extract ofAmmi visnagaL. Lam Seeds

Zaher

Chaouiki

Salghi

et al. 2020

International Journal of Corrosion

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The chemical composition of the methanolic extract of Ammi visnaga (Khella) seeds from the Sidi Slimane region is determined for the first time by Gas Chromatography coupled with Mass Spectrometry (GC/MS). Ten compounds representing 99.638% of the total extract were identified. Khellin (49.011%), Visnagin (26.537%) and Dimethylethylamine (15.108%) are the major components. Moreover, the inhibitory effect of the Methanolic extract of the seeds of Ammi visnaga on the corrosion of mild steel in a solution of 1M HCl is determined using weight loss measurements, the potentiodynamic technique as well as the technique of electrochemical impedance spectroscopy (EIS). It is found that the extract reduces the corrosion rate of the steel in the acid solution. Inhibition efficiency increases as the concentration of the extract increases. The tested compound has an inhibition efficiency of 84% for a concentration equal to 1.0 g/L. The polarization measurements indicate that the examined extract acts as a mixed inhibitor with predominant anodic efficacy. The data obtained from EIS studies are analyzed to model this process using appropriate equivalent circuit models. The adsorption of the extract on the surface of the mild steel obeys the Langmuir adsorption isotherm in acidic medium and the activation is determined and discussed.

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Section: Introductionmentioning

confidence: 99%

Inhibition of Mild Steel Corrosion in 1M Hydrochloric Medium by the Methanolic Extract ofAmmi visnagaL. Lam Seeds

Zaher

Chaouiki

Salghi

et al. 2020

International Journal of Corrosion

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“…In the presence of TSEO, Ecorr is anodically shifted in the range of 5-23 mV, compared to the blank solution, but all values were lower than 85 mV. This displacement greatness is not clear enough to determine the type of inhibitor: cathodic or anodic, as given elsewhere [16,34]. Hence, the obtained results imply that TSEO acted as a mixed-type inhibitor with anodic predominance, as reported by other researchers [35].…”

Section: Electrochemical Measurementsmentioning

confidence: 57%

Thymus Sahraouian Essential Oil as Corrosion Eco-friendly Inhibitor for Mild Steel in a Molar Hydrochloric Acid Solution

Bensouda¹,

Driouch²,

Belakhmima³

et al. 2018

Port. Electrochim. Acta

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Thymus Sahraouian essential oil (TSEO), as a new corrosion eco-friendly inhibitor, has been used to protect mild steel in 1 M HCl. Weight loss, three potentiodynamic polarization methods (Tafel, Stern and Stern-Geary), and electrochemical impedance spectroscopy measurements were undertaken to evaluate corrosion inhibition by TSEO. TSEO acted as an efficient corrosion inhibitor for mild steel in 1 M HCl, and its inhibition efficiency increased with a concentration of 77.82 % at 2 g L -1 . The polarization curves revealed that TSEO acted as a mixed type inhibitor, with predominant anodic action. The EIS studies were fitted to a suitable equivalent circuit model, at 293 K, only reflecting a one-time constant characteristic of a charge transfer process. Besides, the higher is the temperature the lowest is the inhibiting efficiency. The kinetic parameters were in favour of an electrostatic character of TSEO components adsorption onto the mild steel surface, and adsorption followed the Langmuir isotherm model. Micrographic scanning electron microscopy and energy dispersive X-ray spectroscopy analyses confirmed the formation of a protective adsorbed film upon the mild steel surface.

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“…Various plant extracts have been investigated as green inhibitor such as Zenthoxylum alatum plant [2], henna [5], Murraya koenigii leaves [6], potato peel [7], green tea [8], Fig leaves [9], green capsicum annuum fruit [10], Acalypha torta leaf [11], Tagetes erecta (Marigold flower) [12], Musa paradisica peel [13], Phyllanthus amarus leaf [14], Butea monosperma [15], Ginkgo leaf [16], Citrullus lanatus fruit [17], galangal rhizome [18], etc. Moreover, marine algae are also considered as a natural source for green inhibitor, inter alia the extracts of Hydroclathrus clathratus [19], Kappaphycus alvarezii [20], Sargasam swartzii [21], Spirogyra [22], Halopitys Incurvus [4], etc.…”

Section: Introductionmentioning

confidence: 99%

Corrosion inhibition of A516 carbon steel in 0.5 M HCl solution using Arthrospira platensis extract as green inhibitor

2020

Int. J. Corros. Scale Inhib.

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The study on the influence of Arthrospira platensis extract as a corrosion inhibitor on A516 carbon steel in 0.5 M HCl solution has been conducted. The extract was obtained by the maceration method and characterized by phytochemical analysis and infrared spectroscopy. The effect of corrosion inhibition of A. platensis extract was studied by weight loss method, electrochemical impedance spectroscopic measurements and scanning electron microscopy. The dosage of A. platensis extract was varied between 100 to 250 ppm. The results of phytochemical and FTIR analysis show that the extract of A. platensis revealed the presence of saponin, steroid and alkaloid compounds, along with hydroxyl, carbonyl, amine, and carboxylic groups, which are responsible for the adsorption on the carbon steel surface. The extract of A. platensis showed good performance at a dose of 250 ppm with inhibition efficiency of 66% at 298 K. The charge transfer resistance increases from 82 •cm 2 to 246 •cm 2 in the electrochemical impedance spectrum after the addition of 250 ppm A. platensis extract. The adsorption of this extract on the surface of A516 carbon steel obeys the Langmuir isotherm. Thermodynamic parameter of adsorption allows us to suggest the adsorption process was dominated by physical adsorption. SEM analysis supported the inhibitive action of the A. platensis extract against the carbon steel corrosion in acid media.

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Electrochemical and computational aspects of surface interaction and corrosion inhibition of mild steel in hydrochloric acid by Phyllanthus amarus leaf extract (PAE)

Cited by 132 publications

References 54 publications

Inhibition of Mild Steel Corrosion in 1M Hydrochloric Medium by the Methanolic Extract ofAmmi visnagaL. Lam Seeds

Inhibition of Mild Steel Corrosion in 1M Hydrochloric Medium by the Methanolic Extract ofAmmi visnagaL. Lam Seeds

Thymus Sahraouian Essential Oil as Corrosion Eco-friendly Inhibitor for Mild Steel in a Molar Hydrochloric Acid Solution

Corrosion inhibition of A516 carbon steel in 0.5 M HCl solution using Arthrospira platensis extract as green inhibitor

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