Electrochemical Techniques for Corrosion and Tribocorrosion Monitoring: Fundamentals of Electrolytic Corrosion

The anti-corrosive properties of sulphadoxine + pyrimethamine (S+P) on the corrosion of pipeline steel in acidic environment were investigated using electrochemical techniques. The results obtained showed an excellent inhibition efficiency which increased with increase in inhibitor concentration. The corrosion inhibition efficiency increased up to 99.04 % at 0.01M S+P and decreased with rise in temperature down to 85.93 % at 333 K and 0.01 M S+P, suggesting a physiosorptive mechanism of adsorption. Also the adsorption data was fitted into Langmuir and Temkin adsorption isotherms, while the inhibitive action was shown to proceed by mixed inhibition mode.

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Test methods for determining electrolytic corrosion with electrical insulating materials

10.3403/00012501u ◽

2015 ◽

Keyword(s):

Test Methods ◽

Insulating Materials ◽

Electrolytic Corrosion

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Electrical insulating materials. Determination of electrolytic corrosion caused by insuating materials. Test methods

10.3403/30136159 ◽

2007 ◽

Keyword(s):

Test Methods ◽

Insulating Materials ◽

Electrolytic Corrosion

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Studies on Cerium Electrochemistry in High Temperature Ionic Liquids

Revista de Chimie ◽

10.37358/rc.18.1.6054 ◽

2018 ◽

Vol 69 (1) ◽

pp. 112-115

Author(s):

Ana Maria Popescu ◽

Virgil Constantin

Keyword(s):

Molten Salts ◽

Electrochemical Techniques ◽

Active Species ◽

Single Step ◽

Cathodic Process ◽

Molybdenum Electrode ◽

Solute Interaction ◽

Ohmic Drop ◽

State Potential ◽

Direct Discharge

The cathodic behavior of Ce3+ ions in LiF-NaF-BaF2, LiF-NaF-NaCl and NaCl-KCl molten salts at 730� C has been studied using different electrochemical techniques. The decomposition potential (Ed) and the cathodic overvoltage were determined by introducing NaCeF4 as electrochemical active species using steady-state potential-current curves recorded under galvanostatic conditions. The values of |Ed| were 1.85 V in LiF-NaF-BaF2, 2.114 V in LiF-NaF-NaCl and 2.538 V in NaCl-KCl, respectively. It was also found that the ohmic drop potential in melt is not dependent on NaCeF4 concentration and it rises as the current intensity increases. The Tafel slopes and other kinetic parameters were calculated on the assumption that the cathodic process consisted of direct discharge of Ce3+, with no solvent-solute interaction. In order to elucidate the mechanisn of cathodic process the cyclic voltammetry technique was finally used. From the evolution of the voltammograms we conclude that the electrochemical reduction of Ce3+ ion is actually a reversible process on the molybdenum electrode and cathodic reduction of Ce3+ takes place in one single step involving three electron exchange. Our study adds to the accumulating data and confirms available results of electrodeposition of metalic cerium from molten salts using NaCeF4 as solute.

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ABATEMENT OF ANTICANCER DRUGS VIA ELECTROCHEMICAL OXIDATION PROCESS: A REVIEW

10.37516/global.j.sci.eng.2020.010 ◽

2020 ◽

pp. 1-4

Author(s):

CHARULATA SIVODIA ◽

ALOK SINHA

Keyword(s):

Anticancer Drugs ◽

Cell Function ◽

Electrochemical Techniques ◽

Aquatic Organisms ◽

Pharmaceutical Drugs ◽

Cytostatic Drugs ◽

Cancerous Cell ◽

Pharmaceutical Removal ◽

Mutagenic Effects ◽

Made In

The advancement made in biomedical industry upsurges the consumption rate of pharmaceutical drugs. The lack of proper monitoring and regulation methods leads to the unregulated discharge of pharmaceuticals in wastewater, where it can affect the aquatic organisms. Anticancer drugs are also known as cytostatic drugs mainly used for the treatment of cancer by disrupting the cell function and prevent multiplication of cancerous cell. Therefore, anticancer drugs are suspected to pose potential risk on environment by influencing mutagenic effects on the cells of aquatic organisms. An extensive research has been already made in the field of pharmaceutical removal, however their application on the removal of anticancer drugs is limited. This review paper elucidates about different electrochemical techniques for the mitigation of cytostatic drugs.

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Electroanalysis of Tricyclic Psychotropic Drugs using Modified Electrodes

Current Analytical Chemistry ◽

10.2174/1573411014666180917112548 ◽

2019 ◽

Vol 15 (4) ◽

pp. 423-442 ◽

Cited By ~ 1

Author(s):

Mona Habibi-Kool-Gheshlaghi ◽

Farnoush Faridbod ◽

Mahya Karami Mosammam ◽

Mohammad Reza Ganjali

Keyword(s):

Psychotropic Drugs ◽

Analytical Methods ◽

Electrochemical Techniques ◽

Modified Electrodes ◽

Electroanalytical Methods ◽

Drug Assays ◽

Medical Importance ◽

Tricyclic Rings ◽

Easy Operation

Background: Tricyclic psychotropic drugs are defined as a tricyclic rings of the dibenzazepine group with the presence of sulfur and nitrogen atoms. They have been prescribed for antidepressive therapy over the years. Due to their medical importance, many analytical methods have been developed for their monitoring. However, benefits of electrochemical techniques such as costeffectiveness, fast, easy operation and non-destructiveness make them appropriate analytical methods for drug assays. Electrochemical determinations of pharmaceuticals require suitable working electrodes. During years, many electrodes are modified by a variety of modifiers and several sensors were developed based on them. In this regard, nanomaterials, due to their remarkable properties, are one of the most important choices. Objective: Here, the application of electroanalytical methods in the determination of electroactive tricyclic psychotropic drugs will be reviewed and the nanomaterials which are used for improvements of the working electrodes will be considered.

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The anti-corrosion behaviour of Satureja montana L. extract on iron in NaCl solution

Open Chemistry ◽

10.1515/chem-2019-0126 ◽

2019 ◽

Vol 17 (1) ◽

pp. 1087-1094

Author(s):

Zora Pilić ◽

Ivan Dragičević ◽

Ivana Martinović

Keyword(s):

Atomic Absorption Spectrometry ◽

Atomic Absorption ◽

Corrosion Behaviour ◽

Electrochemical Techniques ◽

Absorption Spectrometry ◽

Iron Corrosion ◽

Phenolic Fraction ◽

Fe Complex ◽

Passive Current ◽

Satureja Montana

AbstractThe effect of Satureja montana L. extract (SM) and phenolic fraction of Satureja montana L. (PF) on the corrosion behaviour of iron in 0.1 mol L-1 sodium chloride solution was studied by electrochemical techniques, UV/Vis spectrophotometry and atomic absorption spectrometry. The results of all techniques showed that SM and PF contributed to iron corrosion inhibition. The calculated inhibition efficiency values were about 45% for SM and 55% for PF. Results indicate that the inhibitive action occurs via a precipitation of the Fe-complex onto the iron surface which resulting in a decrease of the passive current density. The atomic absorption spectrometry (AAS) method was applied to the quantitative determination of iron in solution. The obtained results demonstrated good agreement with results obtained by electrochemical techniques.

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Assessing Surface Coverage of Aminophenyl Bonding Sites on Diazotised Glassy Carbon Electrodes for Optimised Electrochemical Biosensor Performance

Nanomaterials ◽

10.3390/nano11020416 ◽

2021 ◽

Vol 11 (2) ◽

pp. 416

Author(s):

Zari Tehrani ◽

Hina Yaqub Abbasi ◽

Anitha Devadoss ◽

Jonathan Edward Evans ◽

Owen James Guy

Keyword(s):

Carboxylic Acid ◽

Surface Coverage ◽

Electrochemical Biosensor ◽

Electrochemical Techniques ◽

Differential Pulse ◽

Second Step ◽

Glassy Carbon Electrodes ◽

Potential Marker ◽

Pulse Voltammetry ◽

Amine Coupling

Electrochemical biosensors using carbon-based electrodes are being widely developed for the detection of a range of different diseases. Since their sensitivity depends on the surface coverage of bioreceptor moieties, it necessarily depends on the surface coverage of amine precursors. Electrochemical techniques, using ferrocene carboxylic acid as a rapid and cheap assay, were used to assess the surface coverage of amino-phenyl groups attached to the carbon electrode. While the number of electrons transferred in the first step of diazotisation indicated a surface coverage of 8.02 ± 0.2 × l0−10 (mol/cm2), and those transferred in the second step, a reduction of nitrophenyl to amino-phenyl, indicated an amine surface coverage of 4–5 × l0−10 (mol/cm2), the number of electrons transferred during attachment of the amine coupling assay compound, ferrocene carboxylic acid, indicated a much lower available amine coverage of only 2.2 × l0−11 (mol/cm2). Furthermore, the available amine coverage was critically dependent upon the number of cyclic voltammetry cycles used in the reduction, and thus the procedures used in this step influenced the sensitivity of any subsequent sensor. Amine coupling of a carboxyl terminated anti-beta amyloid antibody specific to Aβ(1-42) peptide, a potential marker for Alzheimer’s disease, followed the same pattern of coverage as that observed with ferrocene carboxylic acid, and at optimum amine coverage, the sensitivity of the differential pulse voltammetry sensor was in the range 0–200 ng/mL with the slope of 5.07 µA/ng·mL−1 and R2 = 0.98.

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