scholarly journals Protection of Brass in HCl Solution by L-Cysteine and Cationic Surfactant

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Milan B. Radovanovic ◽  
Zaklina Z. Tasic ◽  
Marija B. Petrovic Mihajlovic ◽  
Milan M. Antonijevic
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Electrode Surface ◽  
Active Sites ◽  
Inhibition Efficiency ◽  
Sodium Dodecyl ◽  
Inhibition Mechanism ◽  
Eds Analysis ◽  
Dodecyl Sulfate ◽  
Brass Surface ◽  
Hcl Solution

Electrochemical behavior of brass and inhibitory effect of L-cysteine in HCl solution are investigated using electrochemical techniques in addition to SEM-EDS analysis. Results show that inhibition efficiency depends on inhibitor concentration and immersion time of brass electrode in inhibitor solution. Electrochemical test results point to formation of Cu(I)-cysteine complex on the brass surface in chloride solutions with addition of different amounts of cysteine. The formed complex has an important role in inhibition of the corrosion process in the examined media because Cu(I)-cysteine significantly reduces dissolution of brass. Curves obtained in acidic solution in the presence of cysteine after pretreatment in sodium dodecyl sulfate (SDS) by cyclic measurements and potentiodynamic polarization measurements indicate intense inhibition of corrosion processes. Efficient inhibition of brass dissolution is result of formation of a stable protective layer on the brass surface after pretreatment of the electrode in SDS solution. The brass surface is modified in sodium dodecyl sulfate solution in order to increase cysteine adsorption on the electrode surface and to improve inhibition efficiency. Inhibition mechanism of cysteine includes adsorption on active sites on the electrode surface, which is confirmed by SEM-EDS analysis of brass. Adsorption of cysteine in hydrochloric acid solution obeys the Langmuir adsorption isotherm. Also, Gibbs free energy of adsorption has a value of −31.5 kJ/mol and indicates strong adsorption of cysteine on the electrode surface.

A small molecular, a big scissoring effect: sodium dodecyl sulfate working on two-dimensional metal organic frameworks

CrystEngComm ◽  
2021 ◽  
Author(s):  
Qing Luo ◽  
Zhen Ding ◽  
Huamin Sun ◽  
Zhen Cheng ◽  
Naien SHI ◽  
...  
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Active Sites ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Sodium Dodecyl ◽  
Advanced Materials ◽  
Controlled Synthesis ◽  
Two Dimensional ◽  
Dodecyl Sulfate ◽  
Metal Organic

Ultrathin two-dimensional (2D) metal-organic framework (MOF) nanosheets are prosperous advanced materials due to their particularly thin thickness and exposed active sites. The difficulty in the controlled synthesis of 2D MOF...

Infrared Studies of the Potential Controlled Adsorption of Sodium Dodecyl Sulfate at the Au(111) Electrode Surface

Langmuir ◽  
2012 ◽  
Vol 28 (5) ◽  
pp. 2455-2464 ◽  
Author(s):  
J. Jay Leitch ◽  
John Collins ◽  
Andreas Kaspar Friedrich ◽  
Ulrich Stimming ◽  
John R. Dutcher ◽  
...  
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Electrode Surface ◽  
Sodium Dodecyl ◽  
Infrared Studies ◽  
Dodecyl Sulfate ◽  
Controlled Adsorption

scholarly journals Electrochemical and DFT studies of brass corrosion inhibition in 3% NaCl in the presence of environmentally friendly compounds

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Milan B. Radovanović ◽  
Žaklina Z. Tasić ◽  
Marija B. Petrović Mihajlović ◽  
Ana T. Simonović ◽  
Milan M. Antonijević
Keyword(s):  
Quantum Chemical ◽  
Active Sites ◽  
Inhibition Efficiency ◽  
Energy Gap ◽  
Electrochemical Techniques ◽  
Inhibition Mechanism ◽  
Quantum Mechanical ◽  
Chemical Calculation ◽  
Quantum Mechanical Calculations ◽  
Eds Analysis

Abstract The effects of adenine, salicylaldoxime and 4(5)-methylimidazole on brass corrosion in NaCl were investigated. The investigation comprised electrochemical techniques, scanning electron microscopy and quantum chemical calculation. The results obtained by polarization measurements show that the examined compounds successfully inhibited the corrosion of brass. Additionally, the quantum mechanical calculations indicate that there is a correlation between energy gap and inhibition efficiency. Moreover, the inhibition mechanism includes the adsorption of the inhibitor on active sites on the electrode surface, which was confirmed by SEM-EDS analysis of the brass.

Exploration the inhibition mechanism of sodium dodecyl sulfate on Mg alloy

2020 ◽  
Vol 168 ◽  
pp. 108559 ◽  
Author(s):  
Yan Li ◽  
Xiaopeng Lu ◽  
Kexin Wu ◽  
Lei Yang ◽  
Tao Zhang ◽  
...  
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Sodium Dodecyl ◽  
Mg Alloy ◽  
Inhibition Mechanism ◽  
Dodecyl Sulfate

Synthesis of Ni/Fe Nanoparticles Utilizing PVP–SDS Bound Micelles as a Template to Remove PCB77

NANO ◽  
2015 ◽  
Vol 10 (03) ◽  
pp. 1550035
Author(s):  
Shu Ding ◽  
Lin Zhao ◽  
Yun Qi ◽  
Qianqian Lv
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Active Sites ◽  
Sodium Dodecyl ◽  
Single Component ◽  
Metallic Ions ◽  
Dual Bound ◽  
Fe Nanoparticles ◽  
Dodecyl Sulfate ◽  
Iron Based

In the present study, Ni / Fe nanoparticles were synthesized using bound micelles as a template and 3, 3′, 4, 4′-tetrachlorobiphenyl (PCB77) as the target contaminant. The dual bound micelles, which are composed of polyvinylpyrrolidone (PVP) and sodium dodecyl sulfate (SDS), were found to be superior to single-component templates for the dispersion of metallic ions and thus directed the synthesis of Ni / Fe nanoparticles with improved properties. After characterization of the different nanoparticles, it was found that the sustained effectiveness of PVP–SDS bound micelles afforded specialized structures with two gradations of Ni / Fe nanoparticles, correlating to more active sites and higher activity. The improved activity of the Ni / Fe nanoparticles was finally exhibited by the higher ratio (99.3% in 72 h) and efficiency (k obs of 0.0674 h-1) of PCB77 removal. Herein, the utilization of PVP–SDS bound micelles is proposed as a template for the improvement of iron-based nanoparticles and correlated research.

SEIRAS Studies of Water Structure in a Sodium Dodecyl Sulfate Film Adsorbed at a Gold Electrode Surface

Langmuir ◽  
2015 ◽  
Vol 31 (15) ◽  
pp. 4411-4418 ◽  
Author(s):  
Michael Grossutti ◽  
J. Jay Leitch ◽  
Ryan Seenath ◽  
M. Karaskiewicz ◽  
Jacek Lipkowski
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Electrode Surface ◽  
Gold Electrode ◽  
Sodium Dodecyl ◽  
Water Structure ◽  
Dodecyl Sulfate

scholarly journals Effects of water and sodium dodecyl sulfate additives on Cr(III) ions electroreduction in a deep eutectic solvent

2021 ◽  
pp. 110-116
Author(s):  
V.S. Protsenko ◽  
◽  
L.S. Bobrova ◽  
F.I. Danilov ◽  
◽  
...  
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Equivalent Circuit ◽  
Electrode Surface ◽  
Polarization Resistance ◽  
Electrochemical Impedance ◽  
Electrochemical Reaction ◽  
Sodium Dodecyl ◽  
Deep Eutectic Solvent ◽  
Warburg Impedance ◽  
Dodecyl Sulfate

Kinetics of Cr(III) ions electroreduction in a deep eutectic solvent (ethaline) was studied by using electrochemical impedance spectroscopy. The influence of water and sodium dodecyl sulfate on the kinetic parameters was established. The developed equivalent circuit included polarization resistance of the electrochemical reaction, constant phase element and finite Warburg impedance. The respective parameters of the accepted equivalent circuit were calculated and discussed. The obtained results indicated that the charge transfer is a rate-determining step of an electrochemical reaction occurring on a heterogeneous electrode surface. An increase in content of water in electrolytes resulted in an increase in polarization resistance, indicating the deceleration of Cr(III) ions electroreduction due to the changes in Cr(III) speciation. In addition, the introduction of extra water caused an increase in the value of a capacitive component of electrochemical impedance because of a rearrangement of the double electrical layer. The polarization resistance of Cr(III) ion discharge was increased in the presence of sodium dodecylsulfate in electrolyte due to adsorption of dodecylsulfate anion on the electrode surface. A Warburg impedance component disappeared in electrolytes containing relatively high water content, which was associated with corresponding reduction of solution viscosity and acceleration of diffusion mass transfer.

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