Natural products as a source of environmentally friendly corrosion inhibitors of mild steel in dilute sulphuric acid: Experimental and computational studies

Tezeghdenti, Mohamed; Etteyeb, N.; Dhouibi, L.; Kanoun, Olfa; Al-Hamri, Ammar

doi:10.1134/s2070205117040219

Cited by 18 publications

(7 citation statements)

References 67 publications

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“…This figure shows an inhibitory behavior of an anodic nature since it moves towards the anodic part of the curve. This anodic inhibition behavior is related to the formation of films on the steel surface due to external printed currents [ 31 , 32 ]. Furthermore, it is observed that the corrosion rate is reduced by 32.6%, with respect to the corrosion rate of the untreated steel.…”

Section: Resultsmentioning

confidence: 99%

Innovative Method for Coating of Natural Corrosion Inhibitor Based on Artemisia vulgaris

et al. 2021

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In this work, the production of a novel methodology for the application of natural corrosion inhibitors on steel, using an autoclave is presented. Tests were carried out using Artemisia vulgaris. The inhibitor was produced with a simple soxhlet extraction process using 15 g of Artemisia vulgaris and 260 mL of Ether. Once the inhibitor was produced, the steel was immersed in it, to form a coating that protects the material against corrosion. Thermogravimetry analyzes (TGA) were performed on the inhibitor, to determine the degradation temperature; it was observed that, at 321 °C, the loss of organic mass begins. After applying the inhibitor to the steel, the Fourier Transform Infrared Spectroscopy (FTIR) technique was used to determine the vibrational bands and the difference between the spectra for the steels before and after the coating was applied. For the evaluation of the method efficiency, Electrochemical Impedance Spectroscopy (EIS) and polarization resistance tests were performed, where Nyquist diagrams and Tafel curves were obtained, for steels with and without treatment. In this case, an increase of 93% in the corrosion resistance, and an 88% decrease in the corrosion rate were observed, proving that this methodology can be used to protect steel against corrosion and extend the steel’s useful life.

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Section: Resultsmentioning

confidence: 99%

Innovative Method for Coating of Natural Corrosion Inhibitor Based on Artemisia vulgaris

et al. 2021

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“…where K = 0.00327 defines the corrosion rate (mm yr −1 ), i corr is the corrosion current density in µA cm −2 , ρ is the density of the corroding materials (1.84 g cm −3 ), and EW is the equivalent weight. The protection efficiency is defined by equation ( 2) [58]:…”

Section: Resultsmentioning

confidence: 99%

Corrosion resistance, nano-mechanical properties, and biocompatibility of Mg-plasma-implanted and plasma-etched Ta/TaN hierarchical multilayered coatings on the nitrided AZ91 Mg alloy

Shanaghi¹,

Souri

Mehrjou

et al. 2021

Biomed. Mater.

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A tantalum/tantalum nitride (Ta/TaN) multilayered coating is deposited on plasma-nitridedAZ91 Mg alloy. The top TaN layer undergoes O2 + Ar plasma etching to improve the antibacterial properties and Mg plasma immersion ion implantation (MgPIII) is performed to enhance the biocompatibility and wound healing capability. A uniform, compact, homogeneous, and columnar nanostructured MgPIII and plasma-etched TaN layer with a cluster size of about 17 nm, surface roughness of 0.28 nm, and needle morphology is observed. Although, plasma etching increases the corrosion current density (i corr) from 0.02 to 0.19 µA cm−2 due to larger surface roughness and different potentials between sharp points and smooth points, MgPIII decreases i corr from 0.19 to 0.02 µA cm−2 besides a more positive corrosion potential. The amounts of Mg+2 released to the simulated body fluid (SBF) diminishes from 89.63 ± 0.54 to 60.30 ± 0.47 mg l−1 cm−2 indicating improved corrosion resistance. Under fever conditions (40 °C), i corr decreases by 63%, but the open circuit potential does not change due to the constant chemical composition of the surface as well as thicker double layer and less defects, as confirmed by the larger amount of Mg+2 of 71.49 ± 0.22 mg l−1 cm−2 leached to the SBF. In the self-healing process which occurs via the reactions between the tantalum intermediate layer and electrolytes and penetrating ions through the defects as well as formation of oxide compounds, creation and propagation of defects are deterred as shown the 24 h destructive polarization test in SBF. The combination of plasma etching and MgPIII enhance not only the bacterial resistance and biocompatibility of the super-hard TaN layer by providing the rougher surface on TaN–P–Mg, but also the nano-mechanical properties and anticorrosion properties. As a result, the hardness increases by 7%, elastic modulus decreases by 19%, and the stiffness increases by 21%.

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“…The protective film formed on the metal surface by adsorption of active principles of various plant extracts on the metal surface. The adsorption isotherms are usually Freundlich adsorption isotherm, Temkin adsorption isotherm and Langmuir adsorption isotherm[ 1, 2,5,6].…”

Section: Adsorption Isothermmentioning

confidence: 99%

“…Several plant materials have been used for this purpose. [1][2][3][4][5][6][7][8][9][10] Extracts of plant materials contain many active principles. They contain polar atoms such as S, N, O, P etc.…”

Section: Introductionmentioning

confidence: 99%

Inhibition of corrosion of mild steel by an alcoholic extract of a seaweed Sargassum muticum

Arockiaraj¹,

Kirubavathy²,

Al-Hashem³

et al. 2021

Zaštita materijala

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An alcoholic extract of a sea weed Sargassum muticum has been used to control corrosion of mild steel in 0.5 N HCl. Weight loss method and Electrochemical studies have been used in this study. Weight loss study reveals that 500 ppm of the inhibitor offers 99.25 % inhibition efficiency. Polarization study reveals that the inhibitor functions as an anodic inhibitor at higher concentration. The AC impedance spectra confirm the formation of a protective film on the metal surface. Adsorption of inhibitor molecules on the metal surface follows Langmuir adsorption isotherm.

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Natural products as a source of environmentally friendly corrosion inhibitors of mild steel in dilute sulphuric acid: Experimental and computational studies

Cited by 18 publications

References 67 publications

Innovative Method for Coating of Natural Corrosion Inhibitor Based on Artemisia vulgaris

Innovative Method for Coating of Natural Corrosion Inhibitor Based on Artemisia vulgaris

Corrosion resistance, nano-mechanical properties, and biocompatibility of Mg-plasma-implanted and plasma-etched Ta/TaN hierarchical multilayered coatings on the nitrided AZ91 Mg alloy

Inhibition of corrosion of mild steel by an alcoholic extract of a seaweed Sargassum muticum

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