Portugaliae Electrochimica Acta最新文献_第7页

Electrochemical studies, Monte Carlo simulation and DFT of a new composite - pentaglycidyl ether pentaphenoxy of phosphorus - crosslinked and hybrid in its coating behavior on E24 carbon steel in 3.5% NaCl 新型复合材料-磷交联五甘油酯醚五苯氧基在3.5% NaCl环境下对E24碳钢涂层行为的电化学、Monte Carlo模拟和DFT研究

IF 1.2

Portugaliae Electrochimica Acta Pub Date : 2021-01-01 DOI: 10.4152/pea.202101001

R. Hsissou, F. Benhiba, A. Zarrouk, H. Oudda, A. Elharfi

{"title":"Electrochemical studies, Monte Carlo simulation and DFT of a new composite - pentaglycidyl ether pentaphenoxy of phosphorus - crosslinked and hybrid in its coating behavior on E24 carbon steel in 3.5% NaCl","authors":"R. Hsissou, F. Benhiba, A. Zarrouk, H. Oudda, A. Elharfi","doi":"10.4152/pea.202101001","DOIUrl":"https://doi.org/10.4152/pea.202101001","url":null,"abstract":"This work consists in applying and studying the new pentafunctional phosphoric polymeric architecture – pentaglycidyl ether pentaphenoxy phosphorus (PGEPPP) – on the behavior of its coating, in a marine environment. First, we applied the new macromolecular pentafunctional epoxide (PGEPPP) binder, crosslinked by methylene dianiline and formulated by a natural phosphate, to E24 carbon steel, in the presence of two formulations, F1 (PGEPPP/MDA) and F2 (PGEPPP/MDA/PN). Then, we have studied the behavior of the anticorrosive coating on the metal substrate, in 3.5% NaCl. Indeed, the gravimetric, stationary and transient electrochemical studies of the composite (PGEPPP/MDA/PN) are very interesting and reach maximum values which are equal to 94%, 95% and 91%, respectively. We then proceeded to the prediction of the quantum parameters of the new pentafunctional phosphorus epoxy resin; these parameters were calculated according to the method of the Theory of Functional Density (DFT), at the level of 6-311 G (d,p) basis sets. Finally, the results obtained by the Monte Carlo simulation are in very good agreement with the data of the DFT theory and with the experimental data.","PeriodicalId":20334,"journal":{"name":"Portugaliae Electrochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70918351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Corrosion Inhibition and Electrochemical Behaviour of Commercial Rutin in an Acidic Environment 商品芦丁在酸性环境中的缓蚀及电化学行为

IF 1.2

Portugaliae Electrochimica Acta Pub Date : 2021-01-01 DOI: 10.4152/pea.2021390502

N. Ngobiri, Y. Li, L. Liu

引用次数: 0

Inhibition Efficiency of Copper Corrosion in a Neutral Chloride Solution by Barbituric and Thiobarbituric Acids 巴比妥酸和硫代巴比妥酸在中性氯溶液中对铜的缓蚀效果

IF 1.2

Portugaliae Electrochimica Acta Pub Date : 2021-01-01 DOI: 10.4152/pea.202102085

H. S. Mandour, A. M. Abdel-Karim, A. M. Fathi

{"title":"Inhibition Efficiency of Copper Corrosion in a Neutral Chloride Solution by Barbituric and Thiobarbituric Acids","authors":"H. S. Mandour, A. M. Abdel-Karim, A. M. Fathi","doi":"10.4152/pea.202102085","DOIUrl":"https://doi.org/10.4152/pea.202102085","url":null,"abstract":"Environmental green compounds have emerged as powerful inhibitors for metals and alloys corrosion. So, this article attempts to show that barbituric (BA) and thiobarbituric acids (TBA) are good green corrosion inhibitors for copper immersed in 0.6 mol/L NaCl. A combination of quantitative and qualitative tools were used in this investigation, such as electrochemical impedance spectroscopy (EIS), potentiodynamic polarization, FT-IR spectroscopy, scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX). Polarization measurements indicate that these compounds can function as mixed type inhibitors. It was found that the adsorption of these inhibitors onto the copper surface obeyed Flory-Huggins isotherm. Also, the effect of temperature in the inhibitors absence and presence was studied according to Arrhenius isotherm. Some thermodynamic functions of dissolution and adsorption processes were calculated, such as activation energy (Ea), enthalpy (ΔH), free energy (ΔG) and entropy (ΔS). The barbituric and thiobarbituric acids recorded high inhibition efficiency of copper corrosion at concentrations of 5x10 mol/L and 1x10 mol/L, respectively.","PeriodicalId":20334,"journal":{"name":"Portugaliae Electrochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70918466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Experimental, Quantum Chemical and Monte Carlo Simulation Studies on the Corrosion Inhibition of Mild Steel by Three New Schiff Base Derivatives 三种新型希夫碱衍生物对低碳钢缓蚀作用的实验、量子化学和蒙特卡罗模拟研究

IF 1.2

Portugaliae Electrochimica Acta Pub Date : 2021-01-01 DOI: 10.4152/pea.2021390501

A. Nahlé, M. El-Azzouzi, A. Aouniti, F. Abrigach, A. Djedouani, I. Warad, I. Obot, A. Zarrouk, B. Hammouti

{"title":"Experimental, Quantum Chemical and Monte Carlo Simulation Studies on the Corrosion Inhibition of Mild Steel by Three New Schiff Base Derivatives","authors":"A. Nahlé, M. El-Azzouzi, A. Aouniti, F. Abrigach, A. Djedouani, I. Warad, I. Obot, A. Zarrouk, B. Hammouti","doi":"10.4152/pea.2021390501","DOIUrl":"https://doi.org/10.4152/pea.2021390501","url":null,"abstract":"The corrosion inhibition of newly synthesized Schiff base derivatives, namely (E)-3-(1-((2-aminophenyl)imino)ethyl)-4-hydroxy-6-methyl-2H-pyran-2-one (FMO), (E)-3-(1-((3-aminophenyl)imino)ethyl)-4-hydroxy-6-methyl-2H-pyran-2-one (FMM), and (E)-3-(1-((4-aminophenyl)imino)ethyl)-4-hydroxy-6-methyl-2H-pyran-2-one (FMP) was investigated for mild steel, in a 1.0 M HCl medium, using weight loss, electrochemical impedance spectroscopy, potentiodynamic polarization and theoretical calculations. FMO, FMM and FMP inhibition effectiveness increased with higher inhibitors concentrations, and decreased with a rise in temperature. Polarization studies showed that FMO, FMM and FMP were of mixed type nature. The results obtained from AC-impedance technique were analyzed to model the corrosion inhibition process through a suitable equivalent circuit model, where a constant phase element (CPE) has been used. FMO, FMM and FMP were found to obey Langmuir adsorption isotherm and Kinetic-Thermodynamic Model of El-Awady. Quantum chemical calculations were used to provide molecular based explanations for FMO, FMM and FMP inhibitive effects. Monte Carlo simulation studies and experimental results were in good agreement.","PeriodicalId":20334,"journal":{"name":"Portugaliae Electrochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70918839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Electrochemical and Metallurgical Behavior of Lead-Magnesium Casting Alloys as Grids for Lead-Acid Batteries 铅酸电池栅极用铅镁合金的电化学和冶金性能

IF 1.2

Portugaliae Electrochimica Acta Pub Date : 2021-01-01 DOI: 10.4152/pea.2021390403

S. Khatbi, Y. Gouale, A. Lamiri, M. Essahli

{"title":"Electrochemical and Metallurgical Behavior of Lead-Magnesium Casting Alloys as Grids for Lead-Acid Batteries","authors":"S. Khatbi, Y. Gouale, A. Lamiri, M. Essahli","doi":"10.4152/pea.2021390403","DOIUrl":"https://doi.org/10.4152/pea.2021390403","url":null,"abstract":"In order to evaluate the influence of magnesium on the corrosion resistance of lead anodes in H2SO4 4 M, as well as on the microcrystalline morphology of lead, different electrochemical and metallurgical studies were made, such potentiodynamique polarization, electrochemical impedance spectroscopy, microhardness evolution, X-ray fluorescence spectroscopy and optical microscopy. The obtained results have shown that the addition of magnesium up to 1.5% in weight leads to a significant decrease in the corrosion current density (Icorr) and therefore, it increases the corrosion inhibition efficiency to 83% and it reduces the famous sulfation phenomena, by facilitating the transformation of PbSO4 and PbO to PbO2. It also makes the micro-structure of Pb much stronger, which makes the Pb anodes more resistant to mechanical shocks within the battery. We have also studied the effect of temperature on the corrosion of the new casting alloys. We found that an increase in temperature led to a decrease in its effect on the corrosion of alloys, compared with that of pure lead. Therefore, the new improved battery is more resistant, durable and more environment friendly.","PeriodicalId":20334,"journal":{"name":"Portugaliae Electrochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70918773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparative study of the effect of an acidic anion on the mild steel corrosion inhibition using Rhus Coriaria plant extract and its quercetin component 酸性阴离子对马齿苋提取物及其槲皮素对低碳钢缓蚀作用的比较研究

IF 1.2

Portugaliae Electrochimica Acta Pub Date : 2021-01-01 DOI: 10.4152/pea.2021390402

K. Hijazi, A. Abdel-Gaber, G. Younes, R. Habchi

{"title":"Comparative study of the effect of an acidic anion on the mild steel corrosion inhibition using Rhus Coriaria plant extract and its quercetin component","authors":"K. Hijazi, A. Abdel-Gaber, G. Younes, R. Habchi","doi":"10.4152/pea.2021390402","DOIUrl":"https://doi.org/10.4152/pea.2021390402","url":null,"abstract":"The use of plant extracts as corrosion inhibitors has been increasing greatly in recent studies. The inhibitive effect of sumac, Rhus Coriaria (RC), a Lebanese plant, and Quercetin, one of its chemical constituents, on mild steel corrosion, in 0.5 M HCl and 0.5 M H2SO4 solutions, was studied using electrochemical impedance spectroscopy (EIS), potentiodynamic polarization, atomic force spectroscopy (AFM) and Fourier infrared spectroscopy (FTIR) techniques. Potentiodynamic polarization curves indicated that both RC and its chemical constituent, Quercetin, behave as a mixed type inhibitor in both acidic media. The dissolution process of RC and Quercetin occured under activation control, as showed by EIS measurements, and the corrosion inhibition is the result of the inhibitor adsorption onto the metal surface. Inhibition by RC extract was found to be greater in 0.5 M HCl than in 0.5 M H2SO4 solutions; RC extract also proved to be a better inhibitor than its chemical constituent, Quercetin, in both acids. Thermodynamic parameters indicate that the inhibition process on the steel surface was due to spontaneous physical adsorption of RC and Quercetin onto it. The adsorption model was found to obey thermodynamic-kinetic model and Flory-Huggins model. Surface analysis by AFM spectroscopy investigated the formation of the adsorbed protective film onto the mild steel surface.","PeriodicalId":20334,"journal":{"name":"Portugaliae Electrochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70919098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Kinetics of Electrode Processes on Metals Coated with Hydrocarbon Films in Solutions of Electrolytes 金属包覆烃膜在电解质溶液中的电极过程动力学

IF 1.2

Portugaliae Electrochimica Acta Pub Date : 2021-01-01 DOI: 10.4152/pea.2021390503

V. I. Vigdorovitch, L. Tsygankova, M. Vigdorowitsch, N. Shel, L. Knyazeva

{"title":"Kinetics of Electrode Processes on Metals Coated with Hydrocarbon Films in Solutions of Electrolytes","authors":"V. I. Vigdorovitch, L. Tsygankova, M. Vigdorowitsch, N. Shel, L. Knyazeva","doi":"10.4152/pea.2021390503","DOIUrl":"https://doi.org/10.4152/pea.2021390503","url":null,"abstract":"Kinetics regularities of hydrogen evolution reaction (HER) on Armco iron and copper anodic ionization, covered with a hydrocarbon film based on I-20A oil with a fixed amount of gun grease of the highest quality (GGHQ), were studied at room temperature. The measurements were carried out in aqueous and methanol solutions with the electrolyte composition of x M HCl + (1 x) M LiCl and 0.1 М HCl + х М LiCl + (3.9 х) М LiClO4. The Tafel slope coefficients values, and the orders of reactions, with respect to hydrogen ions (Fe, Cu) and chloride-ions (Cu) were estimated. The effect of oxyethylated amines (OEA), introduced into the solution or hydrocarbon surface coating, on the kinetics of electrode processes, for iron and copper, has been studied. It is shown that HER mechanism on Armco iron and copper anodic ionization does not change in the presence of a hydrocarbon coating on the metal surface. Large OEA molecules freely penetrate from the solution through the hydrocarbon coating to the metal surface, changing partial electrode reactions kinetics. The results are interpreted taking into account the hydrocarbon films surface porous structure.","PeriodicalId":20334,"journal":{"name":"Portugaliae Electrochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70919121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Corrosion Inhibition Study of Mild Steel in an Aqueous Hydrochloric Acid Solution Using Brilliant Cresyl Blue - a Combined Experimental and Monte Carlo Study 亮甲酚蓝对低碳钢在盐酸水溶液中的缓蚀研究——实验与蒙特卡罗相结合的研究

IF 1.2

Portugaliae Electrochimica Acta Pub Date : 2021-01-01 DOI: 10.4152/pea.2021390601

A. Berisha, F. Podvorica, R. Vataj

引用次数: 15

Iron Determination in Deep Groundwater Wells by Anodic Stripping Voltammetry at an Iodine-Coated Platinum Electrode 碘包覆铂电极阳极溶出伏安法测定深水井中的铁

IF 1.2

Portugaliae Electrochimica Acta Pub Date : 2021-01-01 DOI: 10.4152/pea.2021390604

M. Amayreh, M. Hourani, R. Alomari, W. Hourani

{"title":"Iron Determination in Deep Groundwater Wells by Anodic Stripping Voltammetry at an Iodine-Coated Platinum Electrode","authors":"M. Amayreh, M. Hourani, R. Alomari, W. Hourani","doi":"10.4152/pea.2021390604","DOIUrl":"https://doi.org/10.4152/pea.2021390604","url":null,"abstract":"The presented work was pivoted on iron (II) determination in deep groundwater wells samples by using anodic stripping technique at an iodine-coated platinum electrode. The developed method was based on a preconcentration step for five min., followed by the potential scanning of an iodine-coated platinum electrode between the limit of hydrogen evolution (-0.25 V) and the beginning of iodine desorption from the electrode surface (+0.85 V). The anodic peak of the deposited iron to iron (II) oxidation was clearly centered at ca. 0.74 V. The anodic peak current showed an excellent linear response (R 2 = 0.996), within an iron (II) concentration range from 1 to 100 ppm. The obtained limit of detection (LOD) was 0.26 ppm and the limit of quantification (LOQ) was 0.85 ppm. Within the iodine-coated platinum electrode potential window the possible interferences by several ions were evaluated. The developed method was examined by iron (II) concentration determination in deep groundwater wells. The statistical comparisons between the two methods showed the absence of any significant difference between the obtained Inductively Coupled Plasma-Optical Emission Spectrometry (ICP-OES) values and our voltammetric method results, at P = 0.05. iron (II) determination; deep groundwater; stripping voltammetry and iodine-coated platinum electrode.","PeriodicalId":20334,"journal":{"name":"Portugaliae Electrochimica Acta","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70919657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Removal of Ni(II), Zn(II) and Co(II) from Aqueous Solutions by Using Different Types of Activated Carbon 不同类型活性炭去除水溶液中Ni(II)、Zn(II)和Co(II)的研究

IF 1.2

Portugaliae Electrochimica Acta Pub Date : 2021-01-01 DOI: 10.4152/pea.2021390302

M. M. El-Torky, S. Shama, E. A. A. Mohye

引用次数: 0