Corrosion inhibition of amino acids for 316L stainless steel and synergistic effect of I<sup>−</sup> ions: Experimental and theoretical studies

Zhao, Rui; Qian, Yu; Niu, Lin

doi:10.1002/maco.202112511

Cited by 12 publications

(1 citation statement)

References 54 publications

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“…Figure 9 shows the PDP curves for Trp and Phe in comparison with C0 (inhibitor‐free solution) at 240 h. From the figure and table of electrochemical parameters, it can be clearly deduced that both amino acids work as anodic inhibitors as the shift in potential is more than 85 mV and that too toward the noble side. [ 52 ] This means that the inhibition of the metal dissolution process is greater; additionally, there was no change in the trend of the cathodic domain, indicating that the oxidation reaction was not much affected in the presence of Phe and Trp . In a solution with pH ≥ 8.16, the amino acids get deprotonated and carry a negative charge on them (anionic state).…”

Section: Resultsmentioning

confidence: 99%

Corrosion inhibition mechanism of aromatic amino acids for steel in alkaline pore solution simulating carbonated concrete environment

Purnima

Goyal

Luxami

2023

Materials & Corrosion

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Corrosion inhibition mechanism of two aromatic amino acids, phenylalanine (Phe) and tryptophan (Trp), was explored for steel in an alkaline pore solution simulating a carbonated concrete environment. The electrochemical impedance spectroscopy and potentiodynamic polarization test results revealed that both compounds can be used effectively as corrosion inhibitors for carbonated concrete environments with high inhibition efficiency. The dissolution of steel got controlled as Phe and Trp acted as anodic‐type inhibitors. Phe and Trp adsorbed on the steel surface by physiochemisorption process following the Langmuir isotherm. The inhibitive solution analysis through UV–visible technique confirmed the formation of inhibitor–Fe complexes. The surface of steel was analyzed after submergence in corrosive solutions with and without inhibitors by means of optical microscopy, scanning electron microscopy–energy‐dispersive X‐ray spectroscopy, Fourier transformed infrared, and X‐ray photoelectron spectroscopy, which highlights the formation of a compact, barrier layer comprised of metal–inhibitor complex. Subsequently, with the help of the aforementioned techniques, an inhibition mechanism for Phe and Trp was conjectured, which revealed that the presence of additional heterocycle in amino acids can raise the chances of chelation and formation of a more adherent and thermodynamically stable layer. Phe bound with Fe ions through the carboxylate functional group only, while Trp chelated the Fe ions via a nitrogen atom of the pyrrole ring and carboxylate functional group.

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Section: Resultsmentioning

confidence: 99%

Corrosion inhibition mechanism of aromatic amino acids for steel in alkaline pore solution simulating carbonated concrete environment

Purnima

Goyal

Luxami

2023

Materials & Corrosion

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Experimental and Theoretical Approach for the Corrosion Deceleration of Mild Steel in Hydrochloric Acid Medium by Two Sulfonamide Derivatives

Dsouza,

Kudva,

Kumar

et al. 2024

ChemistrySelect

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In the pursuit to find corrosion inhibitors of superior efficacy, N‐(pyrimidin‐2‐yl)‐4‐[(quinazoline‐4‐yl)amino]benzene‐1‐sulfonamide (PQS) and N‐(4‐methylpyrimidin‐2‐yl)‐4‐[(quinazoline‐4‐yl)amino]benzene‐1‐sulfonamide (MQS) are the two new sulfonamides employed, which have decelerating effect on mild steel (MS) corrosion in a medium 0.5 M HCl and were found to have an efficiency of 98.7 % and 96.8 % respectively (303 K for 40 ppm concentration) deliberated through the electrochemical techniques (PDP and EIS). The inhibitory efficacy relies on the temperature of the solution and inhibitor concentration. PQS had greater stability than MQS at higher temperatures which is indicative in the obtained experimental data. The relative adsorption process was in consonance with the Langmuir adsorption isotherm. The SEM, EDS, FT‐IR, and AFM analysis validated PQS and MQS to form a barrier on MS, opposing corrosion. The potential energy surfaces (PES) scan and a theoretical study for PQS and MQS were probed employing density functional theory (DFT) at B3LYP/6‐311+G(d, p) basis set level that explicated the formation of a complex between the sulfonamides and MS. The corrosion inhibition efficiency of PQS and MQS inferred from experimental and theoretical data comply, making them credible corrosion inhibitors.

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Green corrosion inhibitors of steel based on peptides and their constituents: a combination of experimental and computational approach

Simović

Stevanović

Milovanovic

et al. 2023

J Solid State Electrochem

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Corrosion inhibition of amino acids for 316L stainless steel and synergistic effect of I⁻ ions: Experimental and theoretical studies

Cited by 12 publications

References 54 publications

Corrosion inhibition mechanism of aromatic amino acids for steel in alkaline pore solution simulating carbonated concrete environment

Corrosion inhibition mechanism of aromatic amino acids for steel in alkaline pore solution simulating carbonated concrete environment

Experimental and Theoretical Approach for the Corrosion Deceleration of Mild Steel in Hydrochloric Acid Medium by Two Sulfonamide Derivatives

Green corrosion inhibitors of steel based on peptides and their constituents: a combination of experimental and computational approach

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Corrosion inhibition of amino acids for 316L stainless steel and synergistic effect of I− ions: Experimental and theoretical studies

Cited by 12 publications

References 54 publications

Corrosion inhibition mechanism of aromatic amino acids for steel in alkaline pore solution simulating carbonated concrete environment

Corrosion inhibition mechanism of aromatic amino acids for steel in alkaline pore solution simulating carbonated concrete environment

Experimental and Theoretical Approach for the Corrosion Deceleration of Mild Steel in Hydrochloric Acid Medium by Two Sulfonamide Derivatives

Green corrosion inhibitors of steel based on peptides and their constituents: a combination of experimental and computational approach

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Corrosion inhibition of amino acids for 316L stainless steel and synergistic effect of I⁻ ions: Experimental and theoretical studies