Special Issue "Electrochemistry and New Materials Applied to Fuels Analyses and Metal Corrosion Studies"

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Chemical Processes and Systems".

Deadline for manuscript submissions: 30 September 2021.

Special Issue Editors

Prof. Dr. Eliane D'Elia
E-Mail Website
Guest Editor
Inorganic Chemistry Department, Chemistry Institute, Federal University of Rio de Janeiro, Avenida Athos da Silveira Ramos, 149, 21941-909, Ilha do Fundão, RJ, Brazil
Interests: electroanalytical methods; nanomaterials; electrochemical sensors; corrosion inhibitors; coatings for corrosion protection; metal corrosion
Prof. Dr. Ambrish Singh
E-Mail Website
Guest Editor
School of Materials Science and Engineering, Southwest Petroleum University, Chengdu 610500, China
Interests: corrosion inhibitors; corrosion prevention techniques and phenomenon; computational chemistry; green chemistry; polymers; nanomaterials; composites; materials science and engineering; alloys, petroleum engineering; advanced electrochemical corrosion measurements
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Special Issue Information

Dear Colleagues,

Several electrochemical techniques, such as the recording of the corrosion potential, electrochemical impedance spectroscopy (EIS), electrochemical noise analysis (ENA), potentiodynamic polarization curves and Mott–Schottky technique are widely used to study metallic corrosion, as well as to investigate corrosion control methods. Regarding new corrosion inhibitors, natural inhibitors have been gaining greater expressiveness in the literature, since they come from renewable resources and vast availability, besides being biodegradable, of low cost and not harmful to the environment. Nanomaterials as carbon-based nanomaterials are a novel class of materials that have been used in anticorrosive coatings and their incorporation to metal composites and organic coatings come out for enhancing the corrosion protection. Carbon nanoparticles exhibit high stability, good conductivity, low toxicity, and environmental friendliness.

Generally, the standardized methods for the quantitative analysis of contaminants in fuels are based on chromatographic techniques or on time-consuming methods using indirect volumetric determination. Chromatographic techniques, although effective, have some limitations, such as the need for a derivatization step and a long time to the conclusion of the analysis, besides the high cost of standards, which contribute to the search for new analytical methods. Electroanalytical methods as voltammetry, potentiometry, amperometry come as a promising alternative for analyzing the quality of fuels. Nanomaterials have also been widely used in electrochemical sensors for increasing the sensitivity and signal-to-noise ratio.

The aim of this Special Issue, " Electrochemistry and New Materials Applied to Fuels Analyses and Metal Corrosion Studies”, is to consolidate recent findings related to metallic corrosion and fuel analysis using electrochemical techniques and materials from natural products or nanomaterials. These materials are the focus, both for the development of new corrosion inhibitors and anticorrosive coatings and for the research of new electrochemical sensors. Original papers and critical reviews are welcome. Potential topics include, but are not limited to, the following:

  • Corrosion fundamentals;
  • Corrosion control;
  • Corrosion inhibitors;
  • Anticorrosive coatings;
  • Electrochemical sensors;
  • Nanomaterials for sensors.

Prof. Dr. Eliane D'Elia
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Processes is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2000 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • metal corrosion
  • corrosion inhibitors
  • green corrosion inhibitors
  • anticorrosive coatings
  • electroanalytical methods
  • fuel quality
  • nanomaterials for sensors

Published Papers (3 papers)

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Research

Article
Controlling Atmospheric Corrosion of Weathering Steel Using Anodic Polarization Protection Technique
Processes 2021, 9(8), 1469; https://doi.org/10.3390/pr9081469 - 23 Aug 2021
Viewed by 177
Abstract
The atmospheric corrosion of weathering steels varies as a function of geographic zone, season, and other environmental variables related to that region which the experiments have been done. Meanwhile, rusting is a continuous process, and it is the main corrosion product of atmospheric [...] Read more.
The atmospheric corrosion of weathering steels varies as a function of geographic zone, season, and other environmental variables related to that region which the experiments have been done. Meanwhile, rusting is a continuous process, and it is the main corrosion product of atmospheric corrosion. The current study investigates the effects of rust on weathering steel in the localized region of Digha, a sea resort of West Bengal, India. The investigations have been performed by purposely accelerating the rusting of weathering steel in a laboratory within one week in order to simulate approximately 18 months of actual rusting that can be achieved at field exposure. Anodic polarization of weathering steel comparable to potentiostatic passivation is obtained by shorting weathering steel with nobler metals, such as copper or graphite. The effect of rust formation on corrosion resistance after being immersed in 0.01 M KCl solutions for polished and unpolished samples has been investigated using electrochemical techniques, such as potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The rusted surfaces’ morphology and composition were characterized using field emission scanning electron microscope (FE-SEM) and energy dispersive X-ray analysis (EDX). Based on the obtained results, it is concluded that the progressive rusting of weathering steel leads to a decrease in corrosion rate. Full article
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Article
Electrochemical Analysis of Free Glycerol in Biodiesel Using Reduced Graphene Oxide and Gold/Palladium Core-Shell Nanoparticles Modified Glassy Carbon Electrode
Processes 2021, 9(8), 1389; https://doi.org/10.3390/pr9081389 - 10 Aug 2021
Viewed by 325
Abstract
Glycerol is a major byproduct obtained in the production of biodiesel, an important renewable fuel. The presence of free glycerol in fuel can have structural and performance consequences with respect to the engine, making fuel quality control important. The standard method to analyze [...] Read more.
Glycerol is a major byproduct obtained in the production of biodiesel, an important renewable fuel. The presence of free glycerol in fuel can have structural and performance consequences with respect to the engine, making fuel quality control important. The standard method to analyze glycerol in biodiesel is gas chromatography, a time-consuming and expensive technique. In this context, an electrode based on glassy carbon electrodes (GCEs) modified with reduced graphene oxide and core-shell [email protected] nanoparticles was developed for the determination of glycerol in biodiesel. The free glycerol analysis was performed in the aqueous phase obtained by liquid–liquid extraction from a biodiesel sample. Cyclic voltammetry was chosen as the method for glycerol electrochemical analysis to regenerate active sites and promote greater sensor stability. The modified [email protected]/rGO/GCE electrode showed an excellent performance, obtaining a linear range of 18.2 to 109 µmol L−1 with a correlation coefficient of 0.9895, limits of detection and quantification of 5.33 and 17.6 µmol L−1, respectively, high stability during 1000 cycles, and recovery values of 86% and 87% in the quantification of glycerol in biodiesel samples. The proposed method proved to be a great alternative for the analysis of glycerol in biodiesel, being a fast, sensitive, and low-cost technique due to its high stability and the use of small quantities of reagents. Full article
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Article
Ziziphus joazeiro Stem Bark Extract as a Green Corrosion Inhibitor for Mild Steel in Acid Medium
Processes 2021, 9(8), 1323; https://doi.org/10.3390/pr9081323 - 29 Jul 2021
Viewed by 211
Abstract
The aqueous extract of Joazeiro stem bark (EJSB) and its high molecular weight fraction (HMWF) were examined as potential corrosion inhibitors of mild steel in 1 mol L−1 hydrochloric acid media, using weight-loss measurements, potentiodynamic polarization curves and an electrochemical impedance spectroscopy [...] Read more.
The aqueous extract of Joazeiro stem bark (EJSB) and its high molecular weight fraction (HMWF) were examined as potential corrosion inhibitors of mild steel in 1 mol L−1 hydrochloric acid media, using weight-loss measurements, potentiodynamic polarization curves and an electrochemical impedance spectroscopy (EIS).Varying the concentration of the inhibitors from 100 to 800 mg L−1, the results show an increase in anticorrosive efficiency from 85.4 to 89.8 and 89.8 to 93.0% for EJSB and its HMWF, respectively, using the data of the gravimetric essay, and from 84.5 to 94.5 and 89.9 to 94.7% for EJSB and its HMWF, respectively, from the impedance data. The composition of the crude extract was chemically characterized by liquid chromatography-high resolution mass spectrometry. Additionally, scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) were used, respectively, to morphologically and chemically characterize the surface. Considering that the saponin molecules, the main constituent from juá, are responsible for its inhibitory action, quantum chemical calculations showed that the C67, C69 and O144 atoms likely have an important role in the process of electron-donation of saponin to metal, due to the higher values of ƒk+ and %HOMO observed on these atoms. Full article
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