Synthesis of novel liquid crystal compound and study of its behavior as corrosion inhibitor for mild steel in acidic medium (1 M) HCl

Ashmawy, Ashraf M.; El-Sawy, A. M.; Khalil, Hazem

doi:10.1080/15421406.2021.1994827

Cited by 9 publications

(10 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The corrosion inhibitor properties of the produced liquid crystal compound were evaluated for MS in 1 M HCl solution using electrochemical and nonelectrochemical tests, which resulted in a perfect inhibition effect.According to electrochemical results, the I-N-C8 compound acts as mixed-type inhibitor that has been absorbed on the metal surface and covers the active sites on it.The rate of inhibition for the I-N-C8 compound increases as temperature rises because of liquid crystal properties, which generally support the stability of the suggested corrosion inhibitor in highly acidic conditions.The results of inhibition efficiency by different methods showed an enhanced effect. The presence of alkyl chain of only 8 carbon atoms didn't affect the inhibition efficiency as compared with the previously prepared LC of alkyl chain contains 16 carbon atoms which gives an economic advantage for the prepared new compound [39].…”

Section: Discussionmentioning

confidence: 84%

“…This compound is designed so that its chemical structure supports the firm adsorption on the metal surface which reflected on the enhanced inhibition efficiency. In our previous article [39] the inhibition efficiency also reached about 97% by using a LC compound which was designed in the same way as I-N-C8 compound except that it contain longer hydrocarbon chain (16 carbon atoms) in comparison to 8 carbon atoms in case of I-N-C8 compound. This difference gives the prepared LC economic advantages over many similar compounds which have been published as corrosion inhibitors.…”

Section: Mechanism Of Inhibitor Actionmentioning

confidence: 99%

See 1 more Smart Citation

Chemical and Electrochemical Investigation of a Novel Liquid Crystal as an Anticorrosion Agent for Mild Steel in Acidic Media

Elsawy

Khalil²,

Ashmawy³

2022

Egypt. J. Chem.

View full text Add to dashboard Cite

In this work, inhibitory behaviour of the new azomethan compound (I-N-C8) was studied by electrochemical potentiodynamic polarization (PDP), impedance spectroscopy (EIS), and electrochemical frequency modulation (EFM), mass loss measurement, and UV-Visible spectroscopy. The structure was determined by Fourier transform infrared spectroscopy FTIR and mass spectrometry. Also the thermotropic behaviour of the studied liquid-crystal was determined by differential scanning calorimetry (DSC). The results showed that, the prepared compound revealed liquid-crystalline properties and high inhibition efficiency of about 96 %. These results make it more preferred than other inhibitors, in addition to the low cost, more availability of raw material and reduction of pollution.

show abstract

Section: Discussionmentioning

confidence: 84%

Section: Mechanism Of Inhibitor Actionmentioning

confidence: 99%

Chemical and Electrochemical Investigation of a Novel Liquid Crystal as an Anticorrosion Agent for Mild Steel in Acidic Media

Elsawy

Khalil²,

Ashmawy³

2022

Egypt. J. Chem.

View full text Add to dashboard Cite

show abstract

“…For a more comprehensive analysis, EFM was also employed. With an AC amplitude of 10 mV, two different frequencies, namely, 2 and 5 Hz, were applied during the experiments, contributing valuable information on the kinetics and performance of the inhibitors in the aggressive environment. ,− …”

Section: Methodsmentioning

confidence: 99%

“…In this context, novel Schiff base compounds have emerged as promising candidates with the potential to provide robust protection against corrosion in acidic environments. − The compound, characterized by the general formula R-CN-R′, where R and R′ represent aryl, alkyl, cycloalkyl, or heterocyclic groups resulting from the combination of an amine and a carbonyl group, shows promise as an inhibitor. Various Schiff bases (SBs) have been documented as efficient corrosion inhibitors for mild steel − ,− and aluminum , in acidic environments.…”

Section: Introductionmentioning

confidence: 99%

Anticorrosion Agents for Carbon Steel in Acidic Environments: Synthesis and Quantum Chemical Analysis of New Schiff Base Compounds with Benzylidene

Thabet,

AlGhamdi,

Mohammed

et al. 2023

ACS Omega

Self Cite

View full text Add to dashboard Cite

Novel Schiff bases (SBs), namely, N 1 ,N 2 -bis(2-(((E)-4-chlorobenzylidene)amino)ethyl)ethane-1,2-diamine (I), N 1 ,N 2 -bis(2-(((E)-4-(dimethylamino)benzylidene)amino)ethyl)ethane-1,2-diamine (II), and N 1 ,N′ 1 -(ethane-1,2-diyl)bis(N 2 -((((Z)-4-dimethylamino)benzylidene) amino)methylethane-1,2diamine) (III), were prepared and characterized by using elemental analysis, IR, and 1 H NMR spectroscopy. For assessing carbon steel in diverse settings, with and without inhibitors at varying concentrations, electrochemical frequency modulation (EFM), electrochemical impedance spectroscopy (EIS), and potentiodynamic polarization (PP) techniques were employed. The results showed that the synthesized inhibitors effectively decreased the corrosion rate of carbon steel in acidic media and the inhibition efficiency reached up to 93% for compound III at a concentration of 250 ppm. In addition, all prepared compounds were successful as anticorrosion agents, and the inhibition mechanism followed chemisorption from the Langmuir isotherm. The data obtained from the theoretical analysis show that the efficiency of the prepared compounds was in the order III < II < I. Furthermore, quantum chemical calculations were performed to gain insight into the electronic structure of the compounds. The analysis of the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) showed that compound III had the highest surface coverage due to its specific molecular structure and spacer. This observation agreed well with the Langmuir adsorption data.

show abstract

“…Using organic molecules that have electronegative atoms (like N, S, P, and O), unsaturated bonds, and aromatic rings as a way to prevent corrosion is a cost-effective technique. − Schiff bases or azomethines considered a class of organic inhibitors used for this purpose, and they contain nitrogen atoms bonded to carbon atoms by double bonds which makes them easy to absorb because of lone pairs of electrons and high electron density Due to the presence of, most azo derivatives are used as synthetic dyes.…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis of a Novel Cationic Surfactant Based on an Azo Schiff Compound for Use as a Carbon Steel Anticorrosion Agent

Alanazi,

Alshammari,

Alanazi

et al. 2023

ACS Omega

Self Cite

View full text Add to dashboard Cite

The new cationic surfactant-based azo Schiff compound (azoS8) was prepared, characterized, and investigated as a corrosion inhibitor for carbon steel in 1 M HCl by means of electrochemical approaches in this study. The chemical structure of azoS8 has been verified by the FTIR and 1 H NMR spectra. According to the electrochemical system, the examined surfactant is a mixed-type inhibitor. The surfactant azoS8 was an adequate corrosion inhibitor, as evidenced by the reduction in corrosion current densities and the rise in coverage of the surface identified with an evolving inhibitor amount. When the surfactant azoS8 had been added, the capacitive cycle loops on the Nyquist plots were broader, and the dimension of these loops expanded with surfactant azoS8 concentration. This implies that the amount of surfactant azoS8 led to an improvement in the impedance of the steel electrode. The surfactant azoS8 adsorption system is well suited to the Langmuir adsorption isotherm. It was discovered that azoS8 had a Gibbs free energy change value of −27.72 kJ mol –1 , which is a mixed adsorption mechanism containing both physisorption and chemisorption.

show abstract

Synthesis of novel liquid crystal compound and study of its behavior as corrosion inhibitor for mild steel in acidic medium (1 M) HCl

Cited by 9 publications

References 40 publications

Chemical and Electrochemical Investigation of a Novel Liquid Crystal as an Anticorrosion Agent for Mild Steel in Acidic Media

Chemical and Electrochemical Investigation of a Novel Liquid Crystal as an Anticorrosion Agent for Mild Steel in Acidic Media

Anticorrosion Agents for Carbon Steel in Acidic Environments: Synthesis and Quantum Chemical Analysis of New Schiff Base Compounds with Benzylidene

Green Synthesis of a Novel Cationic Surfactant Based on an Azo Schiff Compound for Use as a Carbon Steel Anticorrosion Agent

Contact Info

Product

Resources

About