Multidimensional insights into the corrosion inhibition of 3,3-dithiodipropionic acid on Q235 steel in H2SO4 medium: A combined experimental and in silico investigation

Guo, Lei; Tan, Junjun; Kaya, Savaş; Leng, Senlin; Li, Qingbiao; Zhang, Fan

doi:10.1016/j.jcis.2020.03.001

Cited by 220 publications

(65 citation statements)

References 49 publications

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“…The Nyquist plots of mild steel in the absence and presence of inhibitor are illustrated in Figure 6 . Distinctly, the plots comprised of single capacitive loops, which suggests that the corrosion process is controlled by a charge-transfer process [ 62 , 63 , 64 ]. However, the capacitive loops curve slightly deviated from a perfect semicircle shape, especially at higher frequencies.…”

Section: Resultsmentioning

confidence: 99%

“…Organic compounds typically have lower dielectric constant values (ε ≈ 3-4) compared to water (ε ≈ 80), owing to their outstanding electrical insulating properties [68,69]. Since the molecules of EFB-H displace water molecules on the metal surface upon adsorption, the overall electric conductance drops, and thus restricting the electrical current flow through the double layer [62]. Furthermore, the adsorption of larger inhibitor molecules will also increase the double layer's thickness [70,71].…”

Section: Electrochemical Impedance Spectroscopymentioning

confidence: 99%

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Innovative Method for Longer Effective Corrosion Inhibition Time: Controlled Release Oil Palm Empty Fruit Bunch Hemicellulose Inhibitor Tablet

et al. 2021

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This study aims to develop a controlled release oil palm empty fruit bunch hemicellulose (EFB-H) inhibitor tablet for mild steel in 1 M HCl. As plant extracts tend to deteriorate at longer immersion time, limiting its industrial applicability, we attempted to lengthen the inhibition time by forming a controlled release inhibitor tablet. Electrochemical methods (potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS)) were employed to investigate the efficiency and mechanism of the inhibition. An optimum dosage and immersion time was determined via Response Surface Methodology (RSM). EFB-H tablet was formulated using D-optimal mixture design, and its anticorrosion action at extended immersion time was compared with EFB-H powder. PDP measurement revealed that EFB-H is a mixed type inhibitor. RSM optimization unveiled that the optimum point for a maximum inhibition efficiency (87.11%) was at 0.33 g of EFB-H and 120 h of immersion time. Tablet T3 with EFB-H to gum Arabic to hydroxypropyl methylcellulose ratio of 66:0:34 portrayed the best tensile strength (0.243 MPa), disintegration time (152 min) and dissolution behavior. EFB-H tablet exhibited a longer-lasting inhibition effect than powder, which was 360 h as compared to 120 h for powder. Overall, EFB-H tablet has been successfully developed, and its enhanced effective inhibition time has been experimentally proven.

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Section: Resultsmentioning

confidence: 99%

Section: Electrochemical Impedance Spectroscopymentioning

confidence: 99%

Innovative Method for Longer Effective Corrosion Inhibition Time: Controlled Release Oil Palm Empty Fruit Bunch Hemicellulose Inhibitor Tablet

et al. 2021

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“…The molecules could be spontaneously adsorbed on the surface of the solid. The more negative adsorption energy embodied the adsorption between molecules and the surface of C-S-H gel were more prone to occur and more difficult to be destroyed after adsorption [40]. The solvation energy of the inhibitors was also negative, which indicated that the inhibitors tend to dissolve in alkaline aqueous solution.…”

Section: Energy Analysismentioning

confidence: 99%

Numerical Simulation of Adsorption of Organic Inhibitors on C-S-H Gel

et al. 2020

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Corrosion inhibitors are one of the most effective anticorrosion techniques in reinforced concrete structures. Molecule dynamics (MD) was usually utilized to simulate the interaction between the inhibitor molecules and the surface of Fe to evaluate the inhibition effect, ignoring the influence of cement hydration products. In this paper, the adsorption characteristics of five types of common alkanol-amine inhibitors on C-S-H gel in the alkaline liquid environment were simulated via the MD and the grand canonical Monte Carlo (GCMC) methods. It is found that, in the MD system, the liquid phase environment had a certain impact on the adsorption configuration of compounds. According to the analysis of the energy, the binding ability of MEA on the surface of the C-S-H gel was the strongest. In the GCMC system, the adsorption of MEA was the largest at the same temperature. Furthermore, for the competitive adsorption in the GCMC system, the adsorption characteristics of the inhibitors on the C-S-H gel were to follow the order: MEA>DEA>TEA>NDE>DETA. Both MD and GCMC simulations confirmed that the C-S-H gel would adsorb the organic inhibitors to a different extent, which might have a considerable influence on the organic inhibitors to exert their inhibition effects.

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“…The linear regressive coefficient (R 2 ¼ 0.9999) indicates that the tting result is reliable. According to the slope value, the equilibrium adsorption constant (K ads ) was calculated, which is related to adsorption Gibbs free energy (DG ads ): 34 DG ads ¼ ÀRT ln(55.5K ads ) (9) where 55.5 is the concentration of water in the test solution denoted in mol L À1 . The computed K ads and DG ads values were 1.02 Â 10 5 L mol À1 and À38.5 kJ mol À1 , respectively.…”

Section: Adsorption Isotherm and Synergistic Effectmentioning

confidence: 99%

Synergistic effect of potassium iodide and sodium dodecyl sulfonate on the corrosion inhibition of carbon steel in HCl medium: a combined experimental and theoretical investigation

et al. 2020

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Multidimensional insights into the corrosion inhibition of 3,3-dithiodipropionic acid on Q235 steel in H2SO4 medium: A combined experimental and in silico investigation

Cited by 220 publications

References 49 publications

Innovative Method for Longer Effective Corrosion Inhibition Time: Controlled Release Oil Palm Empty Fruit Bunch Hemicellulose Inhibitor Tablet

Innovative Method for Longer Effective Corrosion Inhibition Time: Controlled Release Oil Palm Empty Fruit Bunch Hemicellulose Inhibitor Tablet

Numerical Simulation of Adsorption of Organic Inhibitors on C-S-H Gel

Synergistic effect of potassium iodide and sodium dodecyl sulfonate on the corrosion inhibition of carbon steel in HCl medium: a combined experimental and theoretical investigation

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