Naproxen-Based Hydrazones as Effective Corrosion Inhibitors for Mild Steel in 1.0 M HCl

The antimicrobial, anticancer, and antioxidant activities of four cobalt (III) complexes, [CoL2]X (X = ClO4¯ (1); OAc¯ (2), Cl¯ (3), or NO3¯ (4) with hydralazine Schiff base derivative (HL), were presented. The structure of the newly synthesized complexes 1 and 2 was confirmed utilizing FTIR, UV‐Vis, and NMR (1H and 13C) spectroscopy. In addition, single crystal X‐ray diffraction was used to approve the structure of complex 1. Based on Hirshfeld analysis, the molecular packing of 1 is controlled by short HH, OH, NH, and HC(π) interactions. The results of the X‐ray photoelectron spectroscopy (XPS) for the Co (III) complexes revealed the characteristic peaks of Co2p3/2 and Co2p1/2 with binding energy differences of 14.85–14.96 which greatly approved that the Co (III) complexes have been assembled successfully. Complex 4 (IC50 = 14.97 ± 0.59 μg/ml) has the highest cytotoxicity against lung carcinoma A‐549 cell line compared to the rest of the Co (III) complexes and the free ligand as well. Also, complex 4 has the best antioxidant activity with IC50 of 283.4 ± 12.3 μg/ml. The free ligand has broad spectrum of antibacterial and antifungal actions, while the studied Co (III) complexes have good antibacterial activity especially the chloride complex 3.

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“…They are widely used as catalytic, luminescent and energy materials, and for environmental purposes. [ 19–23 ]…”

Section: Introductionmentioning

confidence: 99%

Synthesis, structure, X‐ray photoelectron spectroscopy (XPS), and antimicrobial, anticancer, and antioxidant activities of Co (III) complexes based on the antihypertensive hydralazine

Khalil

Soliman

Khalil

et al. 2022

Applied Organom Chemis

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“…The more significant negative sign of ΔH in the presence of the inhibitors indicates an exothermic nature of the corrosion process, suggesting that the ionisation of steel surface is slow [ 27 ] in the presence of both MBC and HBM. A significant and positive value of entropy (ΔS) means that during the rate-determining step, the activated complex is formed via an association rather than a dissociation step [ 28 ], confirming that an increase in the disorder takes place when going from reactants to the activated complex.…”

Section: Resultsmentioning

confidence: 99%

“…Results revealed that the Langmuir adsorption model fitted well ( Figure 2 ) with a correlation coefficient (R 2 ) of 0.991 and 0.990 for MBC and HBM, respectively. The Langmuir equation is shown in Equation (5) [ 28 ]:

where Ɵ is the surface coverage, C inh is the concentration of the MBC and HBM, and K ads is the equilibrium constant of the adsorption. The plot of the Langmuir adsorption model ( Figure 3 a) gives straight lines having high K ads values, indicating that both MBC and HBM molecules have strong interaction with the steel surface.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Assessment of Two Malonyl Dihydrazide Derivatives as Corrosion Inhibitors for Carbon Steel in Acidic Media: Experimental and Theoretical Studies

et al. 2021

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Despite the extensive use of carbon steel in all industrial sectors, particularly in the petroleum industry, its low corrosion resistance is an ongoing problem for these industries. In the current work, two malonyl dihydrazide derivatives, namely 2,2’-malonylbis (N-phenylhydrazine-1-carbothiamide (MBC) and N’1, N’3-bis(-2-hydroxybenzylidene) malonohydrazide (HBM), were examined as inhibitors for the carbon steel corrosion in 1.0 M HCl. Both MBC and HBM were characterised using thin-layer chromatography, elemental analysis, infrared spectroscopy, and nuclear magnetic resonance techniques. The corrosion tests were performed using mass loss measurements, polarisation curves, and electrochemical impedance spectroscopy. It is obtained from the mass loss studies that the optimal concentration for both inhibitors is 2.0 × 10−5 mol/L, and the inhibition efficiencies reached up to 90.7% and 84.5% for MBC and HBM, respectively. Electrochemical impedance spectroscopy (EIS) and potentiodynamic polarisation (PDP) indicate an increased impedance in the presence of both MBC and HBM and mixed-type inhibitors, respectively. Both inhibitors can mitigate corrosion in the range of 298–328 K. Values of free energy changes obtained from the Langmuir model suggest that the inhibitors suppress the corrosion process principally by chemisorption. The computational investigations were conducted to identify the factors connected with the anti-corrosive properties of the examined inhibitors.

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“…By extrapolation of the anodic and cathodic lines, the E cor and j cor values were obtained. The inhibition capacity (η pp /%) is calculated by Equation (1) as follows [39]:…”

Section: Pdp Studies and Comparative Evaluationmentioning

confidence: 99%

Synthesis and Characterization of Zn–Organic Frameworks Containing Chitosan as a Low-Cost Inhibitor for Sulfuric-Acid-Induced Steel Corrosion: Practical and Computational Exploration

et al. 2022

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In this work, a Zn–benzenetricarboxylic acid (Zn@H3BTC) organic framework coated with a dispersed layer of chitosan (CH/Zn@H3BTC) was synthesized using a solvothermal approach. The synthesized CH/Zn@H3BTC was characterized by Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscope (FESEM), thermal gravimetric analysis (TGA), and Brunauer, Emmett, and Teller (BET) surface area. The microscopic observation and the analysis of the BET surface area of CH/Zn@H3BTC nanocomposites indicated that chitosan plays an important role in controlling the surface morphology and surface properties of the Zn@H3BTC. The obtained findings showed that the surface area and particle size diameter were in the range of 80 m2 g−1 and 800 nm, respectively. The corrosion protection characteristics of the CH/Zn@H3BTC composite in comparison to pristine chitosan on duplex steel in 2.0 M H2SO4 medium determined by electrochemical (E vs. time, PDP, and EIS) approaches exhibited that the entire charge transfer resistance of the chitosan- and CH/Zn@H3BTC-composite-protected films on the duplex steel substrate was comparatively large, at 252.4 and 364.8 Ω cm2 with protection capacities of 94.1% and 97.8%, respectively, in comparison to the unprotected metal surface (Rp = 20.6 Ω cm2), indicating the films efficiently protected the metal from corrosion. After dipping the uninhabited and protected systems, the surface topographies of the duplex steel were inspected by FESEM. We found the adsorption of the CH/Zn@H3BTC composite on the metal interface obeys the model of the Langmuir isotherm. The CH/Zn@H3BTC composite revealed outstanding adsorption on the metal interface as established by MD simulations and DFT calculations. Consequently, we found that the designed CH/Zn@H3BTC composite shows potential as an applicant inhibitor for steel protection.

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Naproxen-Based Hydrazones as Effective Corrosion Inhibitors for Mild Steel in 1.0 M HCl

Cited by 16 publications

References 45 publications

Synthesis, structure, X‐ray photoelectron spectroscopy (XPS), and antimicrobial, anticancer, and antioxidant activities of Co (III) complexes based on the antihypertensive hydralazine

Synthesis, structure, X‐ray photoelectron spectroscopy (XPS), and antimicrobial, anticancer, and antioxidant activities of Co (III) complexes based on the antihypertensive hydralazine

Synthesis and Assessment of Two Malonyl Dihydrazide Derivatives as Corrosion Inhibitors for Carbon Steel in Acidic Media: Experimental and Theoretical Studies

Synthesis and Characterization of Zn–Organic Frameworks Containing Chitosan as a Low-Cost Inhibitor for Sulfuric-Acid-Induced Steel Corrosion: Practical and Computational Exploration

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