Effect of variation of the structure of amino acids on inhibition of the corrosion of low-alloy steel in ammoniated citric acid solutions

Abdel-Fatah, Hesham T. M.; Abdel‐Samad, Hesham S.; Hassan, Aliaa A. M.; El-Sehiety, Hala E.E.

doi:10.1007/s11164-013-1073-8

Cited by 15 publications

(3 citation statements)

References 36 publications

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“…A varied range of anticorrosion systems were developed by modeling of protective layers at the metal/medium interface through the adsorption of environmentally friendly inhibitors such as drugs [7][8][9], plant extracts [10], prepolymers/polymers [11][12][13][14][15] and amino acids [6,[16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31]. The corrosion inhibitors contain in their molecular structure heteroatoms such as oxygen, sulfur, nitrogen and phosphorus, possessing lone electron pairs that can be easily delivered towards the iron vacant d-orbital, attaching on the substrate by strong bonds.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Computational Study on Inhibitory Effect and Adsorption Properties of N-Acetylcysteine Amino Acid in Acid Environment

Samide,

Dobriţescu,

Tigae

et al. 2023

Molecules

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Potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) were applied to study the inhibitory effect of N-acetylcysteine (NAC) on corrosion inhibition of carbon steel in hydrochloric acid solution. N-acetylcysteine influenced the iron dissolution to a greater extent than the hydrogen evolution reaction acting as a mixed inhibitor, predominantly anodic. The charge transfer resistance (Rct) gradually increased with the inhibitor concentration. From both methods, the inhibition efficiency (IE) reached a value of 89 ± 1% and NAC adsorption followed the Temkin isotherm. The value of adsorption Gibbs energy (ΔGadso), around −35 kJ mol−1, indicated a spontaneous adsorption and mixed action mechanism, with NAC chemical adsorption prevailing over physical one. New data will be reported by the computational study, that was performed using the density functional theory (DFT) method in aqueous phase. Quantum chemical descriptors were determined by B3LYP theory level with 6–31G+(d) basis set. Metropolis Monte Carlo atomistic simulation was used to reveal the adsorption configuration and interactions between acetylcysteine molecules and the carbon steel surface. Theoretical results were consistent with the experimental data, showing that the inhibitor action mechanism consisted of mainly chemisorption of its molecules on the carbon steel surface accompanied by van der Waals forces and electrostatic interactions.

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Section: Introductionmentioning

confidence: 99%

Experimental and Computational Study on Inhibitory Effect and Adsorption Properties of N-Acetylcysteine Amino Acid in Acid Environment

Samide,

Dobriţescu,

Tigae

et al. 2023

Molecules

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“…The -COOH is a functional group for complexing metal ions in EPS, which contains C = O and C -O can complex with iron ions or other metal ions favoring the formation of a dense protective layer (Ghafari et al, 2013). Methionine and cysteine belong to sulfurcontaining Amino acids, and -SH is the most polar group among Amino acids that can easily bind metal ions, the hydrogen ion on -SH can be free in water, while its negative ion combines with metal ions to form a very strong complex protective film, and this very tight protective layer prevents further metal erosion (Abdel-Fatah et al, 2014). The electron clouds on the aromatic rings of aromatic Amino acids (phe, tyr, and try) and the lone pairs of electrons on the heteroatoms interact with the empty orbitals of iron to form insoluble complexes that cover the metal surface, while the hydrophobic benzene rings form a directional upward arrangement that separates the corrosive medium from the surface of X65 steel, thus inhibiting the corrosion (Ashassi-Sorkhabi et al, 2005;Zhang et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

Effect of Alcaligenes sp. on corrosion behavior of X65 steel in simulated offshore oilfield-produced water

Shi

Wang

2023

Front. Microbiol.

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In this paper, the effect of Alcaligenes sp. on the corrosion process of X65 steel was investigated by using non-targeted metabolomics techniques for comprehensive characterization of metabolites, combined with surface analysis techniques and electrochemical testing. The results showed that the organic acids produced by Alcaligenes sp. accelerated the corrosion process of X65 steel in the early stage, and the presence of Alcaligenes sp. promoted the deposition of stable corrosion products and minerals in the middle and late stages. In addition, proteoglycans and corrosion inhibiting substances were enriched on the metal surface, which enhanced the stability of the film. The combined effect of multiple factors makes the mixed film of biofilm and corrosion products more dense and complete, which effectively inhibits the corrosion of X65 steel.

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“…It is also pertinent to ascertain the optimal concentration for the effectiveness of an inhibitor. Some inhibitors perform excellently at very small concentrations [89] while others perform well at higher concentrations [90]. Hydrodynamic conditions (i.e., stagnant, or dynamic solution) can also affect the inhibition performance.…”

Section: Factors Affecting the Inhibition Ability Of Amino Acid Compo...mentioning

confidence: 99%

A review of amino acids used as corrosion inhibitors on iron metal/alloys in aggressive environments

Ekeke¹,

Efe²,

Nwadire³

2022

Zaštita materijala

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Research into the use of safe and environmentally friendly corrosion inhibitors can pave the way for an understanding of their inhibition mechanisms in metallic alloy materials. This review seeks to present and discuss the research work reported in the literature on the use of amino acids and their derivatives as corrosion inhibitors for iron and its alloys in different aggressive solutions. This non-toxic, biodegradable and relatively cheap corrosion inhibitor has shown to be efficient as an inhibitor for metals/alloys in acidic, alkaline and neutral solutions depending on experimental conditions. Electrochemical and surface techniques were among the most often used techniques to evaluate the corrosion inhibition efficiency of amino acids. Highest values of inhibition efficiency can be obtained in the presence of ions as Iand Br. This review presents and discusses most of the contributions made in literature on the use of amino acids and their derivatives as corrosion inhibitors for iron and its alloys.

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Effect of variation of the structure of amino acids on inhibition of the corrosion of low-alloy steel in ammoniated citric acid solutions

Cited by 15 publications

References 36 publications

Experimental and Computational Study on Inhibitory Effect and Adsorption Properties of N-Acetylcysteine Amino Acid in Acid Environment

Experimental and Computational Study on Inhibitory Effect and Adsorption Properties of N-Acetylcysteine Amino Acid in Acid Environment

Effect of Alcaligenes sp. on corrosion behavior of X65 steel in simulated offshore oilfield-produced water

A review of amino acids used as corrosion inhibitors on iron metal/alloys in aggressive environments

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