Mild steel corrosion inhibition by Parsley (Petroselium Sativum) extract in acidic media

Benarioua, Mokhtar; Mihi, Abdelkader; Bouzeghaia, Nora; Naoun, Mahieddine

doi:10.1016/j.ejpe.2019.01.001

Cited by 81 publications

(33 citation statements)

References 28 publications

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“…In addition, in general, values of Δ G ° ads up to −20 kJ/mol are consistent with a physical process, by means of electrostatic interactions between the polar molecules of the inhibitor and the steel surface; whereas values above −40 kJ/mol suggest chemical interactions by means of a coordinated bond (chemisorption) between the oxygen heteroatoms and the surface of the metal . The Δ G ° ads values for Copao and Quisco extracts are similar and are consistent with a physisorption process; by which the extracts adhere to the surface of the metal, forming a film that inhibits the corrosion process …”

Section: Resultssupporting

confidence: 56%

Evaluation of Eulychnia acida and Echinopsis chiloensis (Cactaceae) extracts in inhibiting corrosion of carbon steel in HCl solution

Figueredo

Vera

Molinari

2019

Materials & Corrosion

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In the present study, the activity of extracts obtained from the stems of two endemic species of the central–northern region of Chile (Eulychnia acida [Copao] and Echinopsis chiloensis [Quisco]), was evaluated as potential corrosion inhibitors for carbon steel in 0.1 M HCl. The total content of phenols and flavonoids in the extracts was determined, and the main components were identified by high‐performance liquid chromatography–mass spectrometry, being similar in both species. The inhibition efficiency of extracts was evaluated by mass loss measures, Tafel polarization curves, and electrochemical impedance spectroscopy. The assay results showed similar values in inhibition percentages, around 88% at extract concentrations of 1,500 ppm. The adsorption on the steel surface followed the Langmuir model adsorption isotherm, whose thermodynamic parameters (ΔG°ads for Copao and Quisco, −17.81 and −17.70 kJ/mol, respectively) suggest a physisorption mechanism. The scanning electron microscopy analyses showed that in the presence of the extracts, the surface of the steel is covered by a thin film that allows the sanding marks to be visualized; while without the extracts the surface is rough due to the HCl corrosion effect.

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Section: Resultssupporting

confidence: 56%

Evaluation of Eulychnia acida and Echinopsis chiloensis (Cactaceae) extracts in inhibiting corrosion of carbon steel in HCl solution

Figueredo

Vera

Molinari

2019

Materials & Corrosion

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“…The constant phase element is introduced into the circuit instead of the pure capacitor of the electrical double layer to compensate for the deviations from the ideal behavior, providing greater precision to the data fit [39]. These deviations are observed in the imperfect semicircles in Nyquist plots.…”

Section: Electrochemical Impedance Spectroscopy (Eis)mentioning

confidence: 99%

Assessment of the hydroalcoholic extract and powder cocoa bean shell as corrosion inhibitors for carbon steel in sodium chloride solution

et al. 2021

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Carbon steel is used in various applications because of its excellent weldability, good mechanical resistance and low cost. However, its application becomes restricted due to its low corrosion resistance in neutral and acidic media, and it is necessary to use processes to retard the corrosive mechanism, such as the use of inhibitors. Many of the effective synthetic inhibitors used are associated with high cost and some have a high toxicity. In recent years, studies of corrosion inhibitors obtained from natural products have been increasing because they are environmentally sustainable and presents low-cost. Therefore, in the present study, different concentrations of the cocoa shell powder (Theobroma cacao) and hydroalcoholic extract were evaluated as a corrosion inhibitors of SAE 1008 carbon steel in 0.5 mol.L -1 sodium chloride solution. The inhibitory action of the cocoa residue was studied through gravimetric technique and electrochemical impedance spectroscopy (EIS). For the chemical characterization of the inhibitor, the Fourier Transform Infrared Spectroscopy (FTIR) was used. The EIS results showed that the corrosion inhibition efficiency of the steel decreased with the inhibitor concentration, reaching maximum values of 55.97% and 72.93%, for cocoa shell powder and hydroalcoholic extract, respectively. The gravimetric data confirmed the electrochemical results and through the study of the adsorption mechanism it was verified that the adsorbed inhibitor molecules follow the Flory-Huggins isotherm model, for both forms of the inhibitor. For all the concentrations evaluated, the cocoa shell powder did not represent an efficient corrosion inhibitor. In contrast, for the hydroalcoholic extract, at the concentration of 0.44 g.L -1 , a good performance was verified as a corrosion inhibitor of SAE 1008 carbon steel in 0.5 mol.L -1 sodium chloride solution.

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“…76 The protonated inhibitor molecules will adsorb on the mild steel surface via chloride ions which form an interconnecting bridge upon replacement of chloride and water molecules. 77 Electrostatic interaction was believed to be generated between the protonated molecules and (FeCl À ) ads species at anodic sites. 78,79 Surface analysis using scanning electron microscope (SEM) proved a signicant improvement on the morphology of the mild steel plates in the presence of an optimum concentration of CNDE and 2 inhibitors.…”

Section: Surface Analysismentioning

confidence: 99%

Corrosion inhibition on mild steel in 1 M HCl solution byCryptocarya nigraextracts and three of its constituents (alkaloids)

et al. 2020

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Mild steel corrosion inhibition by Parsley (Petroselium Sativum) extract in acidic media

Cited by 81 publications

References 28 publications

Evaluation of Eulychnia acida and Echinopsis chiloensis (Cactaceae) extracts in inhibiting corrosion of carbon steel in HCl solution

Evaluation of Eulychnia acida and Echinopsis chiloensis (Cactaceae) extracts in inhibiting corrosion of carbon steel in HCl solution

Assessment of the hydroalcoholic extract and powder cocoa bean shell as corrosion inhibitors for carbon steel in sodium chloride solution

Corrosion inhibition on mild steel in 1 M HCl solution byCryptocarya nigraextracts and three of its constituents (alkaloids)

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