Evaluating corrosion inhibition property of some Schiff bases for mild steel in 1 M HCl: competitive effect of the heteroatom and stereochemical conformation of the molecule

Dutta, Alokdut; Saha, Sourav Kr.; Patra, Apurba K.; Sukul, Dipankar

doi:10.1039/c6ra03521c

Cited by 74 publications

(29 citation statements)

References 60 publications

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“…However, excess charge donation causes the interelectronic repulsion; therefore, some of the charges (electrons) transfer from d‐orbital of the metal to the empty antibonding molecular orbitals of the inhibitor molecules. This process of electron transfer is known as retro‐donation . Similar to metal‐carbonyl interactions, the greater the donation, the greater will be retro‐donation.…”

Section: Metal‐inhibitor Interactions: Coordination Chemistrymentioning

confidence: 99%

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Sulfur and phosphorus heteroatom‐containing compounds as corrosion inhibitors: An overview

Verma

Verma²,

Ebenso

et al. 2018

Heteroatom Chemistry

139

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Use of organic compounds containing nitrogen (N), oxygen (O), sulfur (S), and phosphorus (P) heteroatoms in their molecular structures is one of the most effective, economic, and practical corrosion inhibitors. The effectiveness of the heteroatoms toward metallic corrosion inhibition follows the order: P > S > N > O. The metal‐inhibitor interactions involve the charge sharing between the heteroatoms and empty d‐orbitals of the surface metallic atoms; therefore, a heteroatom with lower electronegativity value is more potent to form strong bonding (charge sharing) with metallic surface as compared to more electronegative heteroatom. Literature study reveals that almost all corrosion inhibitors have either one or more heteroatoms in their molecular structures particularly in the form of polar functional groups, which enhance their adsorption tendency on metallic surface. Present review paper features the collection of some major works that have been published on metallic corrosion inhibition containing these P, S, O, and N heteroatoms. Since now, several review articles have been published describing the application of N and O atoms; however, the reviews on use of P and S heteroatoms are scare. Therefore, aim of the present article was to mainly describe the collection of corrosion inhibitors containing S and P heteroatoms.

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Section: Metal‐inhibitor Interactions: Coordination Chemistrymentioning

confidence: 99%

“…This process of electron transfer is known as retro-donation. [47][48][49] Similar to metal-carbonyl interactions, the greater the donation, the greater will be retro-donation. Both donation and retro-donation strengthen each other through the process of synergism.…”

Section: Interactions: Coordination Chemistrymentioning

confidence: 99%

Sulfur and phosphorus heteroatom‐containing compounds as corrosion inhibitors: An overview

Verma

Verma²,

Ebenso

et al. 2018

Heteroatom Chemistry

139

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“…In many cases, environmentally friendly, the so-called “green corrosion inhibitors” are being sought. 15,18−20,47 Such corrosion inhibitors have low ecotoxicity and could also be applicable for crude oil extraction. 16,20…”

Section: Introductionmentioning

confidence: 99%

Efficiency of Steel Corrosion Inhibitors in an Environment of Ethanol–Gasoline Blends

et al. 2019

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Ethanol produced from renewable sources (i.e., bioethanol) is a first-generation biofuel that is currently being added as a biocomponent into gasolines. Mixtures of ethanol and gasoline are designated as ethanol–gasoline blends (EGBs). Ethanol has high polarity and moisture affinity, which considerably influence the properties of the resulting EGBs including their aggressiveness to many metallic and nonmetallic materials. The corrosion aggressiveness of EGBs can be minimized by suitable corrosion inhibitors. In this study, we tested three different corrosion inhibitors on mild steel in the environment of aggressive E10, E25, E60, and E85 fuels. The inhibitors tested were diethylene triamine (DETA) and two mixed inhibitors containing propargyl alcohol, dibenzyl sulfoxide, and octadecyl amine. To study the efficiency of the corrosion inhibitors, we used static and dynamic corrosion tests and electrochemical measurements including impedance spectroscopy and potentiodynamic polarization. The highest corrosion aggressiveness on mild steel was observed for the E60 fuel. The highest inhibitory efficiency was, for all the fuels tested, observed for the DETA inhibitor. For the DETA concentration of 100 mg·L –1 , the inhibitory efficiency in the E60 fuel was determined to be around 98%.

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“…All molecules were geometrically optimized using DFT/B3LYP method associated with 6-31G++(2d,p) basis set. [38][39][40][41][42] The optimization process was conrmed by the absence of imaginary vibration frequencies. Aerward, several relevant molecular electronic structure parameters (global and locale indicators) were calculated.…”

Section: Quantum Chemical Studiesmentioning

confidence: 99%

Experimental and theoretical investigations of benzoic acid derivatives as corrosion inhibitors for AISI 316 stainless steel in hydrochloric acid medium: DFT and Monte Carlo simulations on the Fe (110) surface

et al. 2020

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Evaluating corrosion inhibition property of some Schiff bases for mild steel in 1 M HCl: competitive effect of the heteroatom and stereochemical conformation of the molecule

Abstract: Corrosion inhibition property due to the heteroatom present in organic Schiff bases and their stereochemical conformation is assessed. Three Schiff bases, namely 2-pyridyl-N-(2′-methylamino/methylthio/methoxy phenyl)methyleneimine are employed.

Cited by 74 publications

References 60 publications

Sulfur and phosphorus heteroatom‐containing compounds as corrosion inhibitors: An overview

Sulfur and phosphorus heteroatom‐containing compounds as corrosion inhibitors: An overview

Efficiency of Steel Corrosion Inhibitors in an Environment of Ethanol–Gasoline Blends

Experimental and theoretical investigations of benzoic acid derivatives as corrosion inhibitors for AISI 316 stainless steel in hydrochloric acid medium: DFT and Monte Carlo simulations on the Fe (110) surface

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