Pub Date : 2024-03-23DOI: 10.3103/s1068375524010083
V. M. Kosenkov
Abstract
Based on mathematical modeling of the process of electrohydraulic sheet stamping, the influence of a pressure plate on the deformation of a workpiece rigidly clamped along its outer contour was studied. The influence of the thickness of the pressure plate and its internal diameter, in relation to the diameter of the cavity of the cylindrical discharge chamber, on the energy of plastic deformation of the workpiece and the shape of its deflection; parameters of the pressure plate on the pressure of hydrodynamic waves on the workpiece; and the shape of its deflection and the efficiency of using the energy stored in the capacitor bank for plastic deformation of the workpiece have been established.
{"title":"Influence of Pressure Plate Parameters on the Efficiency of Electrohydraulic Deformation of a Rigidly Clamped Workpiece","authors":"V. M. Kosenkov","doi":"10.3103/s1068375524010083","DOIUrl":"https://doi.org/10.3103/s1068375524010083","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Based on mathematical modeling of the process of electrohydraulic sheet stamping, the influence of a pressure plate on the deformation of a workpiece rigidly clamped along its outer contour was studied. The influence of the thickness of the pressure plate and its internal diameter, in relation to the diameter of the cavity of the cylindrical discharge chamber, on the energy of plastic deformation of the workpiece and the shape of its deflection; parameters of the pressure plate on the pressure of hydrodynamic waves on the workpiece; and the shape of its deflection and the efficiency of using the energy stored in the capacitor bank for plastic deformation of the workpiece have been established.</p>","PeriodicalId":782,"journal":{"name":"Surface Engineering and Applied Electrochemistry","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140204195","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}
Pub Date : 2024-03-23DOI: 10.3103/s106837552401006x
J. Gokulakrishnan, K. Kamakshi, K. C. Sekhar
Abstract
The surface plasmon resonance (SPR) of metal nanoparticles (NPs) plays a crucial role in designing numerous chemical and biomolecule sensors. Therefore, in this work, gold (Au) NPs thin films were deposited on a glass substrate at the substrate temperature of 300°C using the pulsed laser deposition method. The effect of the number of laser pulses on the morphology and optical properties of Au NPs was investigated through scanning electron microscopy, ultraviolet-visible spectroscopy, and photoluminescence studies. Scanning electron microscopy revealed that the particle size increased from 14 to 28 nm whereas the inter-particle distance decreased from 19 to 8 nm with an increase of the number of laser pulses from 1000 to 5000, but the thickness of the Au NPs film increased from 107.5 to 132.4 nm. The observance of the SPR peak around 565–586 nm in absorption spectroscopy confirmed the formation of Au NPs. The red shift of the SPR peak position at higher numbers of laser pulses could be attributed to the simultaneous enhancement in the particle size and the reduction of the inter-particle distance. Further, the trend of the full-width half maxima in the intrinsic and extrinsic particle size region was studied, and the phenomena behind the SPR broadening was briefly explained. The photoluminescence spectrum has also shown a strong emission band at 530 nm, with a corresponding energy band gap of 2.34 eV, and the band position was in good agreement with the SPR peak position. This study suggests that the SPR properties of Au NPs can be tuned by varying the number of laser pulses as it strongly affects the morphology of Au NPs.
{"title":"Tuning the Morphological and Optical Properties of Pulsed Laser-Deposited Gold Nanoparticle Thin Films by Varying Number of Laser Pulses","authors":"J. Gokulakrishnan, K. Kamakshi, K. C. Sekhar","doi":"10.3103/s106837552401006x","DOIUrl":"https://doi.org/10.3103/s106837552401006x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The surface plasmon resonance (SPR) of metal nanoparticles (NPs) plays a crucial role in designing numerous chemical and biomolecule sensors. Therefore, in this work, gold (Au) NPs thin films were deposited on a glass substrate at the substrate temperature of 300°C using the pulsed laser deposition method. The effect of the number of laser pulses on the morphology and optical properties of Au NPs was investigated through scanning electron microscopy, ultraviolet-visible spectroscopy, and photoluminescence studies. Scanning electron microscopy revealed that the particle size increased from 14 to 28 nm whereas the inter-particle distance decreased from 19 to 8 nm with an increase of the number of laser pulses from 1000 to 5000, but the thickness of the Au NPs film increased from 107.5 to 132.4 nm. The observance of the SPR peak around 565–586 nm in absorption spectroscopy confirmed the formation of Au NPs. The red shift of the SPR peak position at higher numbers of laser pulses could be attributed to the simultaneous enhancement in the particle size and the reduction of the inter-particle distance. Further, the trend of the full-width half maxima in the intrinsic and extrinsic particle size region was studied, and the phenomena behind the SPR broadening was briefly explained. The photoluminescence spectrum has also shown a strong emission band at 530 nm, with a corresponding energy band gap of 2.34 eV, and the band position was in good agreement with the SPR peak position. This study suggests that the SPR properties of Au NPs can be tuned by varying the number of laser pulses as it strongly affects the morphology of Au NPs.</p>","PeriodicalId":782,"journal":{"name":"Surface Engineering and Applied Electrochemistry","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140204142","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}
Pub Date : 2024-03-23DOI: 10.3103/s1068375524010046
T. Bortsoi
Abstract
It has been shown that the response of the functional property of the deposit on the action of dimensional factors of electrolysis conditions equally determines the dimensional property of the electrolyte. It has been established that the most universal assessment methods of dimensional effects can be formed based on the correlation of dimensionless quantities for a number of specified and directional values of the size factor with a number of corresponding values of the functional parameter of the sediment. It is shown that studying the dimensional properties of electrolytes and deposits, depending on the type of dimensional factors and their scale scales, will expand the capabilities of the electrolytes used, increase the controllability of the formation of the functional parameter of the deposit, obtain new information about the process of deposition of nanostructured deposits, and reveal the factors which previously did not attract attention. A determination method and cell for quantifying the dimensional properties of the precipitate and electrolyte are presented.
{"title":"Size Effect in Electroplating: Determination Method and Cell for Its Evaluation","authors":"T. Bortsoi","doi":"10.3103/s1068375524010046","DOIUrl":"https://doi.org/10.3103/s1068375524010046","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>It has been shown that the response of the functional property of the deposit on the action of dimensional factors of electrolysis conditions equally determines the dimensional property of the electrolyte. It has been established that the most universal assessment methods of dimensional effects can be formed based on the correlation of dimensionless quantities for a number of specified and directional values of the size factor with a number of corresponding values of the functional parameter of the sediment. It is shown that studying the dimensional properties of electrolytes and deposits, depending on the type of dimensional factors and their scale scales, will expand the capabilities of the electrolytes used, increase the controllability of the formation of the functional parameter of the deposit, obtain new information about the process of deposition of nanostructured deposits, and reveal the factors which previously did not attract attention. A determination method and cell for quantifying the dimensional properties of the precipitate and electrolyte are presented.</p>","PeriodicalId":782,"journal":{"name":"Surface Engineering and Applied Electrochemistry","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140204126","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}
Pub Date : 2024-03-23DOI: 10.3103/s1068375524010162
N. F. Zikrillaev, M. M. Shoabdurakhimova, K. S. Ayupov, F. E. Urakova, O. S. Nematov
Abstract
Research into self-oscillatory processes in semiconductors and semiconductor structures makes it possible to formulate the physical mechanism of these unique phenomena and create solid-state generators and sensors of physical quantities with frequency-amplitude output. It was established that the excitation conditions and parameters of self-oscillations of the current were studied in more detail only in silicon doped with manganese and zinc atoms, as well as in semiconductor compounds CdSe, CdS, InGa and in some structures, while the boundary regions of existence of these current instabilities depending on external factors were not very accurately determined in other materials. This led to the lack of reproducible results and a discrepancy in the correlation between the electrical parameters of the material and the parameters of self-oscillations of the current (amplitude, frequency). In this regard, the results of comprehensive studies of self-oscillations of current in silicon doped with impurity atoms of manganese, zinc, sulfur, and selenium are presented. A physical mechanism of current self-oscillations is proposed, which is in good agreement with the known experimental results obtained.
{"title":"Self-Oscillatory Processes in Silicon, Problems and Prospects for Research, and Their Application in Electronics","authors":"N. F. Zikrillaev, M. M. Shoabdurakhimova, K. S. Ayupov, F. E. Urakova, O. S. Nematov","doi":"10.3103/s1068375524010162","DOIUrl":"https://doi.org/10.3103/s1068375524010162","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Research into self-oscillatory processes in semiconductors and semiconductor structures makes it possible to formulate the physical mechanism of these unique phenomena and create solid-state generators and sensors of physical quantities with frequency-amplitude output. It was established that the excitation conditions and parameters of self-oscillations of the current were studied in more detail only in silicon doped with manganese and zinc atoms, as well as in semiconductor compounds CdSe, CdS, InGa and in some structures, while the boundary regions of existence of these current instabilities depending on external factors were not very accurately determined in other materials. This led to the lack of reproducible results and a discrepancy in the correlation between the electrical parameters of the material and the parameters of self-oscillations of the current (amplitude, frequency). In this regard, the results of comprehensive studies of self-oscillations of current in silicon doped with impurity atoms of manganese, zinc, sulfur, and selenium are presented. A physical mechanism of current self-oscillations is proposed, which is in good agreement with the known experimental results obtained.</p>","PeriodicalId":782,"journal":{"name":"Surface Engineering and Applied Electrochemistry","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140204137","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}
Pub Date : 2024-03-23DOI: 10.3103/s1068375524010022
M. I. Baranov
Abstract—
Approximate calculations were made to identify the main features of the propagation of standing transverse electromagnetic waves (EMWs) and standing longitudinal de Broglie electron waves in a homogeneous non-massive non-magnetic metallic conductor of finite dimensions (radius r0 and length l0 ⪢ r0) with axial alternative conduction current i0(t) of different amplitude–time parameters. Relations were obtained for the calculation estimation of averaged propagation velocities of standing transverse EMWs and standing longitudinal de Broglie electron waves in the metal (alloy) of the specified conductor. It was demonstrated that quantized standing transverse EMWs emerging in the finite-sized metallic conductor significantly differ from ordinary transverse EMWs propagating in conducting media of unlimited dimensions. An important characteristic of the standing transverse EMWs in the considered conductor is that their axial electric field intensity leads in phase their azimuthal magnetic field intensity by an angle of π/2. It was found that, in the standing transverse EMWs in the investigated conductor, the energy of the electric field is only converted into the energy of their magnetic field and vice versa. Therefore, the standing transverse EMWs do not transfer electromagnetic energy fluxes along the metal (alloy) of the considered conductor.
{"title":"Features of Propagation of Standing Electromagnetic and Electron Waves in a Metallic Conductor with Alternating Conduction Current","authors":"M. I. Baranov","doi":"10.3103/s1068375524010022","DOIUrl":"https://doi.org/10.3103/s1068375524010022","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">\u0000<b>Abstract</b>—</h3><p>Approximate calculations were made to identify the main features of the propagation of standing transverse electromagnetic waves (EMWs) and standing longitudinal de Broglie electron waves in a homogeneous non-massive non-magnetic metallic conductor of finite dimensions (radius <i>r</i><sub>0</sub> and length <i>l</i><sub>0</sub> ⪢ <i>r</i><sub>0</sub>) with axial alternative conduction current <i>i</i><sub>0</sub>(<i>t</i>) of different amplitude–time parameters. Relations were obtained for the calculation estimation of averaged propagation velocities of standing transverse EMWs and standing longitudinal de Broglie electron waves in the metal (alloy) of the specified conductor. It was demonstrated that quantized standing transverse EMWs emerging in the finite-sized metallic conductor significantly differ from ordinary transverse EMWs propagating in conducting media of unlimited dimensions. An important characteristic of the standing transverse EMWs in the considered conductor is that their axial electric field intensity leads in phase their azimuthal magnetic field intensity by an angle of π/2. It was found that, in the standing transverse EMWs in the investigated conductor, the energy of the electric field is only converted into the energy of their magnetic field and vice versa. Therefore, the standing transverse EMWs do not transfer electromagnetic energy fluxes along the metal (alloy) of the considered conductor.</p>","PeriodicalId":782,"journal":{"name":"Surface Engineering and Applied Electrochemistry","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140204116","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}
Pub Date : 2024-02-01DOI: 10.3103/s1068375524010095
Abstract
To improve the performance of the CompoNiAl-M5-3 alloy produced from nickel monoaluminide, protective coatings were applied by electrospark deposition (ESD) using electrodes made of the Zr–18%Ni eutectic alloy. The coatings were applied in an argon environment using tools for manual treatment both of vibrational and rotational types with the connection of direct and reverse polarities. It was determined that the maximum total deposition on the cathode of 11.17 × 10–4 cm3 is achieved when using a tool of the rotational type with a direct polarity of connection. The obtained coatings are characterized by 100% continuity at a thickness of 20–25 μm, hardness of 11.6–14.6 GPa, and elastic modulus of 162–174 GPa. Electrospark treatment increases the hardness of the CompoNiAl-M5-3 alloy by a factor of 1.4 to 1.8, wear resistance by factor of 3.3 to 16.2, and heat resistance at a temperature of 1150°C for 5 h decreases coefficient of friction.
{"title":"Features of the Formation of Electrospark Coatings on the CompoNiAl-M5-3 Alloy Produced from Nickel Monoaluminide Using an Electrode Made of Zr–18% Ni Eutectic Alloy","authors":"","doi":"10.3103/s1068375524010095","DOIUrl":"https://doi.org/10.3103/s1068375524010095","url":null,"abstract":"<span> <h3>Abstract</h3> <p>To improve the performance of the CompoNiAl-M5-3 alloy produced from nickel monoaluminide, protective coatings were applied by electrospark deposition (ESD) using electrodes made of the Zr–18%Ni eutectic alloy. The coatings were applied in an argon environment using tools for manual treatment both of vibrational and rotational types with the connection of direct and reverse polarities. It was determined that the maximum total deposition on the cathode of 11.17 × 10<sup>–4</sup> cm<sup>3</sup> is achieved when using a tool of the rotational type with a direct polarity of connection. The obtained coatings are characterized by 100% continuity at a thickness of 20–25 μm, hardness of 11.6–14.6 GPa, and elastic modulus of 162–174 GPa. Electrospark treatment increases the hardness of the CompoNiAl-M5-3 alloy by a factor of 1.4 to 1.8, wear resistance by factor of 3.3 to 16.2, and heat resistance at a temperature of 1150°C for 5 h decreases coefficient of friction.</p> </span>","PeriodicalId":782,"journal":{"name":"Surface Engineering and Applied Electrochemistry","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140204029","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}
Pub Date : 2024-02-01DOI: 10.3103/s1068375524010034
Abstract
The current study was conducted to measure the concentrations of nitrite by a glassy carbon electrode modified with MXene/La3+ doped ZnO/hemoglobin (Hb) nanocomposite as a new voltammetric sensor. Chronoamperometry, differential pulse voltammetry, and cyclic voltammetry were employed to characterize the modification of the electrode surface. According to the analytical results, the glassy carbon electrode incorporated with MXene/La3+ doped ZnO/Hb nanocomposite was able to detect the presence of different concentrations of nitrite (0.1–700.0 μM), with the detection limit of 4.0 × 10–8 M. The proposed sensor can be proposed as acceptable electrochemical detector of nitrite in real samples.
{"title":"Voltammetric Determination of Nitrite Using Modified Glassy Carbon Electrode","authors":"","doi":"10.3103/s1068375524010034","DOIUrl":"https://doi.org/10.3103/s1068375524010034","url":null,"abstract":"<span> <h3>Abstract</h3> <p>The current study was conducted to measure the concentrations of nitrite by a glassy carbon electrode modified with MXene/La<sup>3+</sup> doped ZnO/hemoglobin (Hb) nanocomposite as a new voltammetric sensor. Chronoamperometry, differential pulse voltammetry, and cyclic voltammetry were employed to characterize the modification of the electrode surface. According to the analytical results, the glassy carbon electrode incorporated with MXene/La<sup>3+</sup> doped ZnO/Hb nanocomposite was able to detect the presence of different concentrations of nitrite (0.1–700.0 μM), with the detection limit of 4.0 × 10<sup>–8</sup> M. The proposed sensor can be proposed as acceptable electrochemical detector of nitrite in real samples.</p> </span>","PeriodicalId":782,"journal":{"name":"Surface Engineering and Applied Electrochemistry","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140204172","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}
Pub Date : 2024-02-01DOI: 10.3103/s1068375524010125
Abstract
Abrasive water jet (AWJ) cutting is an emerging material processing technology with significant advantages, such as no thermal deformation, high processing versatility, high flexibility, and low cutting force. It is used in various applications including machining, cleaning, surface preparation, and material cutting. The main concerns during the AWJ cutting process are the surface roughness and the kerf geometry. This study aimed to successfully predict the surface roughness and the kerf geometry during low pressure AWJ machining to cut metal sheets at low and high water pressures when cutting the stainless steel and copper specimens. The experimental results show that a low water pressure indicates fewer variations between the surface roughness and the kerf angle. At various pressures, the roughness values ranged from 3.087 to 4.817 µm. A regression model was developed to predict the surface roughness and the kerf angle. As a result, the effect of water pressure can only increase the kinetic energy but cannot affect other processing parameters separately. Scanning electron microscopy revealed micro-cracks during the AWJ cutting process.
{"title":"Impact of Pressure on Surface Roughness and Kerf Characteristics Using Low Pressure Abrasive Water Jet Cutting","authors":"","doi":"10.3103/s1068375524010125","DOIUrl":"https://doi.org/10.3103/s1068375524010125","url":null,"abstract":"<span> <h3>Abstract</h3> <p>Abrasive water jet (AWJ) cutting is an emerging material processing technology with significant advantages, such as no thermal deformation, high processing versatility, high flexibility, and low cutting force. It is used in various applications including machining, cleaning, surface preparation, and material cutting. The main concerns during the AWJ cutting process are the surface roughness and the kerf geometry. This study aimed to successfully predict the surface roughness and the kerf geometry during low pressure AWJ machining to cut metal sheets at low and high water pressures when cutting the stainless steel and copper specimens. The experimental results show that a low water pressure indicates fewer variations between the surface roughness and the kerf angle. At various pressures, the roughness values ranged from 3.087 to 4.817 µm. A regression model was developed to predict the surface roughness and the kerf angle. As a result, the effect of water pressure can only increase the kinetic energy but cannot affect other processing parameters separately. Scanning electron microscopy revealed micro-cracks during the AWJ cutting process.</p> </span>","PeriodicalId":782,"journal":{"name":"Surface Engineering and Applied Electrochemistry","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140204117","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}
Pub Date : 2024-02-01DOI: 10.3103/s1068375524010149
Abstract
In this study, new synthesized triazole-containing copolymer derivatives were investigated. The title compounds were identified using Fourier-transform infrared spectroscopy, proton nuclear magnetic resonance spectroscopy, and carbon-13 nuclear magnetic resonance spectroscopy. The inhibitory effects of the synthesized compounds (1, 2, and 5) on the corrosion of mild steel in a solution containing 0.5 M H2SO4 were studied using also the electrochemical polarization technique (Tafel plots). The resulted values of corrosion parameters showed the efficacy of corrosion inhibition by raising the concentration of organic corrosion inhibitors of mild steel in 0.5 M H2SO4 solution at 295 K.
摘要 本研究考察了新合成的含三唑共聚物衍生物。利用傅立叶变换红外光谱、质子核磁共振光谱和碳-13核磁共振光谱对标题化合物进行了鉴定。此外，还利用电化学极化技术（塔菲尔图）研究了合成化合物（1、2 和 5）在含有 0.5 M H2SO4 的溶液中对低碳钢腐蚀的抑制作用。腐蚀参数的结果值表明，在 295 K 的 0.5 M H2SO4 溶液中提高有机缓蚀剂的浓度对低碳钢具有有效的缓蚀作用。
{"title":"Synthesis of New 1,2,4-Triazole Containing Copolymers and Their Corrosion Inhibition оf Mild Steel in Acidic Medium","authors":"","doi":"10.3103/s1068375524010149","DOIUrl":"https://doi.org/10.3103/s1068375524010149","url":null,"abstract":"<span> <h3>Abstract</h3> <p>In this study, new synthesized triazole-containing copolymer derivatives were investigated. The title compounds were identified using Fourier-transform infrared spectroscopy, proton nuclear magnetic resonance spectroscopy, and carbon-13 nuclear magnetic resonance spectroscopy. The inhibitory effects of the synthesized compounds (<strong>1</strong>, <strong>2</strong>, and <strong>5</strong>) on the corrosion of mild steel in a solution containing 0.5 M H<sub>2</sub>SO<sub>4</sub> were studied using also the electrochemical polarization technique (Tafel plots). The resulted values of corrosion parameters showed the efficacy of corrosion inhibition by raising the concentration of organic corrosion inhibitors of mild steel in 0.5 M H<sub>2</sub>SO<sub>4</sub> solution at 295 K.</p> </span>","PeriodicalId":782,"journal":{"name":"Surface Engineering and Applied Electrochemistry","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140204034","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}
Pub Date : 2023-12-14DOI: 10.3103/s1068375523060157
N. Rajan, M. Naga Swapna Sri, P. Anusha, R. Thanigaivelan, S. Vijayakumar
Abstract
The aluminum metal matrix composite (AMMC) is now occupying an irreplaceable space in various industries due its advantages such as a great strength to the weight ratio, good wear resistance, and a reduced density. In this paper, the AMMC was developed using aluminum 7075 reinforced with 5 and 10% boron carbide. The L18 orthogonal array was used for conducting the electrochemical micromachining experiments. The AMMC was a wire cut into thin sheets; and specimen 1 designates the AMMC with 5% boron carbide, and specimen 2 designates the AMMC with 10% boron carbide. The tool electrode was of a diameter of 0.5 mm, and sodium nitrate was used as an electrolyte. The technique for order of preference by similarity to ideal solution and the principal component analysis were utilised in order to find out the best parameter combination on the machining speed, the diametral overcut, and the delamination factor. The electrolyte concentration of 35 g/L, the voltage of 11 V, and the duty cycle of 70% were found to be the optimal combination for the machining speed, the diametral overcut, and the delamination factor in specimen 1. The ANOVA analysis results showed that the duty cycle is a significant factor, with its 53.5% contribution.
{"title":"Performance Optimization of Electrochemical Machining Parameters on Aluminum Metal Matrix Composite","authors":"N. Rajan, M. Naga Swapna Sri, P. Anusha, R. Thanigaivelan, S. Vijayakumar","doi":"10.3103/s1068375523060157","DOIUrl":"https://doi.org/10.3103/s1068375523060157","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The aluminum metal matrix composite (AMMC) is now occupying an irreplaceable space in various industries due its advantages such as a great strength to the weight ratio, good wear resistance, and a reduced density. In this paper, the AMMC was developed using aluminum 7075 reinforced with 5 and 10% boron carbide. The L<sub>18</sub> orthogonal array was used for conducting the electrochemical micromachining experiments. The AMMC was a wire cut into thin sheets; and specimen 1 designates the AMMC with 5% boron carbide, and specimen 2 designates the AMMC with 10% boron carbide. The tool electrode was of a diameter of 0.5 mm, and sodium nitrate was used as an electrolyte. The technique for order of preference by similarity to ideal solution and the principal component analysis were utilised in order to find out the best parameter combination on the machining speed, the diametral overcut, and the delamination factor. The electrolyte concentration of 35 g/L, the voltage of 11 V, and the duty cycle of 70% were found to be the optimal combination for the machining speed, the diametral overcut, and the delamination factor in specimen 1. The ANOVA analysis results showed that the duty cycle is a significant factor, with its 53.5% contribution.</p>","PeriodicalId":782,"journal":{"name":"Surface Engineering and Applied Electrochemistry","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138631595","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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