Surface Engineering and Applied Electrochemistry最新文献_第3页

Combustion Synthesis of SrAl2O4:Eu2+ Phosphor. Photoluminescence and Cathodoluminescence at Low Temperatures 燃烧合成SrAl2O4:Eu2+荧光粉。低温下的光致发光和阴极发光

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Surface Engineering and Applied Electrochemistry Pub Date : 2023-09-04 DOI: 10.3103/S1068375523040117

M. Nazarov

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Intensification of the Processes of Extraction of Humic Acids from Biosubstrates under the Action of Electric Discharges 放电作用下生物基质中腐植酸提取过程的强化研究

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Surface Engineering and Applied Electrochemistry Pub Date : 2023-09-04 DOI: 10.3103/S1068375523040087

A. P. Malyushevskaya, A. N. Yushchishina

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Plasma-Electrolytic Coatings Obtained on VT1-0 Titanium with a Short Processing Time 用短加工时间在VT1-0钛上制备等离子体电解涂层

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Surface Engineering and Applied Electrochemistry Pub Date : 2023-09-04 DOI: 10.3103/S1068375523040051

I. A. Kozlov, B. L. Krit, N. V. Morozova, M. V. Gerasimov, I. V. Suminov

{"title":"Plasma-Electrolytic Coatings Obtained on VT1-0 Titanium with a Short Processing Time","authors":"I. A. Kozlov, B. L. Krit, N. V. Morozova, M. V. Gerasimov, I. V. Suminov","doi":"10.3103/S1068375523040051","DOIUrl":"10.3103/S1068375523040051","url":null,"abstract":"<p>The possibility of obtaining thin continuous plasma-electrolyte protective oxide coatings on VT1-0 titanium in a nickel sulfate alkaline electrolyte without the addition of silicates in the sparking mode was studied. The elemental composition and the microstructure of coatings manufactured via plasma electrolytic oxidation (PEO) both on the substrate and after the destruction of the coating in 25% sulfuric acid were studied. As a result of the research, a possibility of forming thin (1–7 μm) continuous PEO coatings, with a treatment duration of 3–10 min, respectively, was established. The introduction of additives (for example, nickel sulfate) into the electrolyte is effective when the duration of PEO is more than 10 min. It was supposed that nickel was incorporated into the coating mainly due to the action of plasma microarcs. The limited corrosion resistance of the resulting coatings in aggressive media was noted. An analysis of the elemental composition of the dry residues of the coating after destruction in a 25% sulfuric acid solution gives grounds to assume the electrochemical nature of the corrosion destruction of such coatings.</p>","PeriodicalId":49315,"journal":{"name":"Surface Engineering and Applied Electrochemistry","volume":"59 4","pages":"433 - 437"},"PeriodicalIF":0.9,"publicationDate":"2023-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4191274","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}

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Gas Discharge Point Source of UV Radiation Based on Argon–Copper Gas–Vapor Mixture 基于氩气-铜气-蒸汽混合物的紫外辐射气体放电点源

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Surface Engineering and Applied Electrochemistry Pub Date : 2023-07-05 DOI: 10.3103/S1068375523030158

A. K. Shuaibov, R. V. Gritsak, A. I. Minya, Z. T. Gomoki, A. A. Malinina, A. N. Malinin, M. I. Vatrala

{"title":"Gas Discharge Point Source of UV Radiation Based on Argon–Copper Gas–Vapor Mixture","authors":"A. K. Shuaibov, R. V. Gritsak, A. I. Minya, Z. T. Gomoki, A. A. Malinina, A. N. Malinin, M. I. Vatrala","doi":"10.3103/S1068375523030158","DOIUrl":"10.3103/S1068375523030158","url":null,"abstract":"<p>The characteristics of a pulse periodic source of a long-range UV radiation with overvoltage pumping by a bipolar discharge of nanosecond duration between copper electrodes in argon at atmospheric pressure are investigated. Copper vapors were introduced into the discharge due to the ectonic mechanism when a sufficient amount of the electrode material vapors is introduced into the discharge gap due to microexplosions of inhomogeneities of the surface of metal electrodes in a strong electric field of an overvoltage high-current nanosecond discharge. The characteristics of an overvoltage nanosecond discharge at a distance between the electrodes of 2 mm are studied. The emission spectra of the discharge were analyzed, and the intensity of the UV radiation of a point emitter was optimized depending on the supply voltage of the high-voltage modulator and the repetition rate of discharge pulses. The identification of the emission spectra of plasma made it possible to establish the main excited plasma products that form the spectrum of the UV radiation of the plasma. The study of the spectral characteristics of plasma based on gas-vapor mixtures “copper–argon” showed that the most intense were the spectral resonance lines of the copper atom and ion. It was found that a space-uniform overvoltage nanosecond discharge was ignited between copper electrodes at an interelectrode distance of 2 mm. It was found that the maximum value of the average UV power at <i>p</i>(Ar) = 101 kPa was observed for the UV-A range.</p>","PeriodicalId":49315,"journal":{"name":"Surface Engineering and Applied Electrochemistry","volume":"59 3","pages":"362 - 367"},"PeriodicalIF":0.9,"publicationDate":"2023-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4212401","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}

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Peculiarities of Formation of Phase and Elemental Composition during Electrospark Alloying Using a Manual High-Frequency Vibrator 手动高频振动电火花合金化过程中相和元素组成的特点

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Surface Engineering and Applied Electrochemistry Pub Date : 2023-07-05 DOI: 10.3103/S1068375523030110

A. V. Koval’

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Economical Way to Protect Mild Steel in Acidic Medium: Combined Experimental and Theoretical Studies 在酸性介质中保护低碳钢的经济方法:实验与理论的结合研究

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Surface Engineering and Applied Electrochemistry Pub Date : 2023-07-05 DOI: 10.3103/S1068375523030146

Nabil Al-Zaqri, Abdulnasser Karami, Hamza Ichou, Nadia Arrousse, Ismail Warad

{"title":"Economical Way to Protect Mild Steel in Acidic Medium: Combined Experimental and Theoretical Studies","authors":"Nabil Al-Zaqri, Abdulnasser Karami, Hamza Ichou, Nadia Arrousse, Ismail Warad","doi":"10.3103/S1068375523030146","DOIUrl":"10.3103/S1068375523030146","url":null,"abstract":"<p>Organic molecules are often considered to be the best way to protect a material from corrosion, but the synthesis process is very expensive. In the present work, the ethanol solvent was investigated as efficient inhibitor of the mild steel corrosion in a molar hydrochloric acid solution via several methods including polarization and, electrochemical impedance spectroscopy to evaluate the concentration effect of the studied compound. The result shows that ethanol as inhibitor protects mild steel against corrosion in an acidic solution with the inhibition efficiency of 84% at 10<sup>–3</sup> M concentration obtained by EIS method. The polarization curves data show the studied inhibitor to be of the mixt type. Also, a good correlation between the impedance and the Tafel curves data were observed. Various adsorption isotherm models were tested to elucidate the adsorption mechanism of ethanol. In addition, the scanning electron microscopy with energy dispersive X‑ray analysis was applied to confirm the adsorption of ethanol onto the surface of mild steel and its anti-corrosion effect by a formed protective layer. Also, this result was supported by theoretical studies such as the Monte Carlo simulations and the density functional theory.</p>","PeriodicalId":49315,"journal":{"name":"Surface Engineering and Applied Electrochemistry","volume":"59 3","pages":"368 - 377"},"PeriodicalIF":0.9,"publicationDate":"2023-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4214730","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

The Regularities of Titanium and Tungsten Carbide Formation from Products of Electric Explosion Destruction of Conductors 导体电爆破坏产物生成碳化钛和碳化钨的规律

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Surface Engineering and Applied Electrochemistry Pub Date : 2023-07-05 DOI: 10.3103/S1068375523030043

Yu. O. Adamchuk, S. V. Chushchak, L. Z. Boguslavskii, A. V. Sinchuk

{"title":"The Regularities of Titanium and Tungsten Carbide Formation from Products of Electric Explosion Destruction of Conductors","authors":"Yu. O. Adamchuk, S. V. Chushchak, L. Z. Boguslavskii, A. V. Sinchuk","doi":"10.3103/S1068375523030043","DOIUrl":"10.3103/S1068375523030043","url":null,"abstract":"<div><div><h3>\u0000 <b>Abstract</b>—</h3><p>A series of electric explosions were carried out on single and twisted conductors of various diameters made of titanium (Ti) and tungsten (W) in propane-butane. Analysis of the electro-physical characteristics of the explosion showed that the process of resistive heating of the conductors is characterized by two monotonically increasing sections on the voltage and current curves, separated by a flat segment (plateau), which corresponds to a relatively stable specific electrical resistance of refractory metals in a liquid state. The energy introduced into the conductor during the resistive heating stage, which can be higher or lower than the energy of sublimation of the conductor and can be regulated by changing the external parameters of the discharge circuit, is a key indicator that determines the structural-phase state of the destruction products and the chemical interaction of the conductor. Conditions were realized under which micro- and nanosized powder products of the electric explosion do not contain residual metals and consist entirely of carbide phases (TiC with an average microhardness of 29 580 MPa in the explosion of titanium conductors, and a mixture of W<sub>2</sub>C + WC<sub>1 – <i>x</i></sub> dominated by stabilized high-temperature nonstoichiometric cubic carbide WC<sub>1 – <i>x</i></sub> with an average microhardness of 16 770 MPa in the explosion of tungsten conductors).</p></div></div>","PeriodicalId":49315,"journal":{"name":"Surface Engineering and Applied Electrochemistry","volume":"59 3","pages":"281 - 289"},"PeriodicalIF":0.9,"publicationDate":"2023-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4215255","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}

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Effect of Fermentation of Concentrated Whey on the Production of Organic Acids during Electroprocessing 浓缩乳清发酵对电加工过程中有机酸生产的影响

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Surface Engineering and Applied Electrochemistry Pub Date : 2023-07-05 DOI: 10.3103/S106837552303016X

I. I. Vutkareva

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Effects of Pulsed Laser Irradiation on Commercially Pure Titanium: Mechanical Properties and Corrosion Resistance in a Salty Environment 脉冲激光辐照对工业纯钛的影响:机械性能和耐盐环境腐蚀性能

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Surface Engineering and Applied Electrochemistry Pub Date : 2023-07-05 DOI: 10.3103/S1068375523030079

Chouarfa Fella, Bahloul Abida, Boufas Samira, Boussaha El-Hadi, Aouici Samia

{"title":"Effects of Pulsed Laser Irradiation on Commercially Pure Titanium: Mechanical Properties and Corrosion Resistance in a Salty Environment","authors":"Chouarfa Fella, Bahloul Abida, Boufas Samira, Boussaha El-Hadi, Aouici Samia","doi":"10.3103/S1068375523030079","DOIUrl":"10.3103/S1068375523030079","url":null,"abstract":"<p>In this work, the surface oxidation of commercially pure titanium (CP-Ti grade 4) was performed by means of a Nd:YAG in a continuous wave mode in an air environment. The morphology, structure and chemical composition of the formed layers were analyzed by different characterization techniques, such as X‑ray diffraction, scanning electron microscope coupled to an electron microprobe, optical microscopy, and optical profilometry. The diffusion of light atmospheric elements (oxygen and nitrogen) was also investigated. The corrosion resistance of the treated samples was examined in 3.0 wt % NaCl solution using potentiodynamic polarization measurements. The results were compared with those obtained from untreated CP-Ti tested under the same conditions. The analysis indicates that ultra-short pulses (in a nanosecond scale) from a Nd:YAG laser effectively enhanced the corrosion resistance of the studied alloy in 3.0 wt % NaCl (simulated marine environment). An improved corrosion resistance was obtained due to the microstructural changes caused by rapid solidification after laser treatment. A notable enhancement in hardness was reached as well.</p>","PeriodicalId":49315,"journal":{"name":"Surface Engineering and Applied Electrochemistry","volume":"59 3","pages":"378 - 383"},"PeriodicalIF":0.9,"publicationDate":"2023-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4548458","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}

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Preparation, Characterization, and Inhibition Effect of Novel Nonionic Gemini Surfactants Based on Sebacic Acid against Carbon Steel Corrosion in Acidic Medium 新型癸二酸Gemini非离子表面活性剂的制备、表征及对碳钢在酸性介质中的缓蚀作用

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Surface Engineering and Applied Electrochemistry Pub Date : 2023-07-05 DOI: 10.3103/S1068375523030031

Samar Abdelhamed, Mona A. El-Etre, Mohamed Deef Allah

{"title":"Preparation, Characterization, and Inhibition Effect of Novel Nonionic Gemini Surfactants Based on Sebacic Acid against Carbon Steel Corrosion in Acidic Medium","authors":"Samar Abdelhamed, Mona A. El-Etre, Mohamed Deef Allah","doi":"10.3103/S1068375523030031","DOIUrl":"10.3103/S1068375523030031","url":null,"abstract":"<p>Three nonionic gemini surface active agents on the base of sebacic acid with different propoxylated units were prepared for this research work, and their forms were studied using infra-red and hydrogen nuclear magnetic resonance spectroscopy. The surfactants physical characteristics were determined. They were found to be inhibitors of the corrosion for carbon steel in a HCl solution. In this investigation, the weight loss and the electrochemical techniques were applied. All of the studied agents were shown to be persuasive inhibitors of corrosion, with inhibition efficiency values exceeding 99%. The efficiency of the inhibition was shown to improve as the surfactant concentration and the exposure time increased, as well as the number of propylene units per a surfactant molecule. The studied surfactants acted as mixed-type inhibitors, according to polarization studies. Surfactants were found to protect steel from acidic corrosion by physically adsorbing their molecules onto the steel surface and forming a protective barrier between the metal and the corrosive liquid, decreasing the corrosion rate. Surfactants adsorption followed the Langmuir adsorption isotherm. Atomic force spectroscopy was used to investigate the surface of the carbon steel as blank specimen and in an acidic solution. The acquired images, as well as the surface properties measured, agree with the results obtained via other techniques used.</p>","PeriodicalId":49315,"journal":{"name":"Surface Engineering and Applied Electrochemistry","volume":"59 3","pages":"384 - 399"},"PeriodicalIF":0.9,"publicationDate":"2023-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4548460","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