Zastita materijala最新文献_第5页

Superior electrochemical performance of SnSe-PPy nanocomposites for supercapacitor application 用于超级电容器的 SnSe-PPy 纳米复合材料的卓越电化学性能

Zastita materijala Pub Date : 2024-03-15 DOI: 10.62638/zasmat1002

Yashna Anthony, V. Ragupathi

引用次数: 0

Corrosion inhibition by fruit extracts -Inhibition of corrosion of mild steel in simulated concrete pore solution prepared in sea water by an aqueous extract of apple juice- A Case study 水果提取物的缓蚀作用--苹果汁水提取物在海水制备的模拟混凝土孔隙溶液中抑制低碳钢腐蚀的案例研究

Zastita materijala Pub Date : 2024-03-15 DOI: 10.62638/zasmat1040

Rajendran Susai, A. Al-Hashem, Arjunan Krishnaveni, L. Arockiaraj, Gurmeet Singh, Č. Lačnjevac, Murugan Naga Jothi, Pooviah Shanthy

{"title":"Corrosion inhibition by fruit extracts -Inhibition of corrosion of mild steel in simulated concrete pore solution prepared in sea water by an aqueous extract of apple juice- A Case study","authors":"Rajendran Susai, A. Al-Hashem, Arjunan Krishnaveni, L. Arockiaraj, Gurmeet Singh, Č. Lačnjevac, Murugan Naga Jothi, Pooviah Shanthy","doi":"10.62638/zasmat1040","DOIUrl":"https://doi.org/10.62638/zasmat1040","url":null,"abstract":"The inhibition efficiency of an aqueous extract of apple juice in controlling corrosion of mild steel immersed in simulated concrete pore solution (SCPS) prepared in sea water, has been evaluated by weight loss method. Langmuir adsorption isotherm has been investigated. The mechanistic aspect of corrosion inhibition has been investigated by Electrochemical impedance spectra (AC impedance spectra). The protective film has been analysed by Fluorescence spectroscopy, FTIR spectroscopy and AFM. The SCPS system offers 60% inhibition efficiency to mild steel immersed in sea water. In presence of apple juice extract the inhibition efficiency increases as the concentration of the extract increases. When 10 ml of extract is added, 85% inhibition efficiency is obtained. Electrochemical impedance spectra (AC impedance spectra) reveal that a protective film is formed on the metal surface. In the presence of inhibitor system, charge transfer resistance value increases, impedance value increases, phase angle value increases whereas double layer capacitance value decreases as expected. The FTIR spectral study reveals that the protective film consists of complexes consisting of iron-active principles of the apple juice extract. AFM study reveals that when the inhibition efficiency increases the roughness of the surface decreases or in other words the smoothness of the system increases.","PeriodicalId":23842,"journal":{"name":"Zastita materijala","volume":"88 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140238125","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 behavior of high- and low-chromium steel grinding balls in chloride solution 高铬和低铬钢研磨球在氯化物溶液中的腐蚀行为

Zastita materijala Pub Date : 2024-03-15 DOI: 10.62638/zasmat998

Snežana Marković, Bojana M. Radojković, B. Jegdić, Aleksandar Jovanović, Jovica Stojanović, Milan Trumić, V. Manojlović

{"title":"Corrosion behavior of high- and low-chromium steel grinding balls in chloride solution","authors":"Snežana Marković, Bojana M. Radojković, B. Jegdić, Aleksandar Jovanović, Jovica Stojanović, Milan Trumić, V. Manojlović","doi":"10.62638/zasmat998","DOIUrl":"https://doi.org/10.62638/zasmat998","url":null,"abstract":"The corrosion behaviour of three types of alloys (two low-alloy carbon steel and one stainless iron with ~15 wt.% Cr), in a solution which simulates seawater (3% NaCl solution, pH 8.1) was tested. Tested samples are used to make steel (iron) balls applied in mils for grinding copper and other ore. The corrosion tests were performed using three electrochemical methods, at room temperature in the presence of atmospheric oxygen. The linear polarization resistance (LPR) method, electrochemical impedance spectroscopy (EIS) method, and linear sweep voltammetry (LSV) method were applied. Based on measurements by LPR and EIS methods (as non-destructive methods), the value of polarization resistance (Rp) was determined and the general corrosion rate (vcorr) of the examined samples was calculated. The obtained values of the general corrosion rate can be used to calculate the service life of steel (iron) balls under exploitation conditions (seawater). The appearance of the surface after linear sweep voltammetry (LSV) measurement showed the presence of localized corrosion (pits were formed) of the tested samples, especially stainless iron, and the LSV method is not suitable for the determination of the general corrosion rate of tested samples in seawater. This form of corrosion occurs at high anodic polarizations, during performing LSV measurements.","PeriodicalId":23842,"journal":{"name":"Zastita materijala","volume":"14 20","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140240501","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

Impact of annealing on structural and optical properties of sol-gel derived samarium silica nanocomposites 退火对溶胶凝胶衍生钐硅纳米复合材料结构和光学特性的影响

Zastita materijala Pub Date : 2024-03-15 DOI: 10.62638/zasmat1011

Aryan Boora, Bhavna Rohilla, Priya Malik, Supriya Sehrawat, Sushma Kumari, Anisha Sharma, Kirti Dahiya, S. Duhan

{"title":"Impact of annealing on structural and optical properties of sol-gel derived samarium silica nanocomposites","authors":"Aryan Boora, Bhavna Rohilla, Priya Malik, Supriya Sehrawat, Sushma Kumari, Anisha Sharma, Kirti Dahiya, S. Duhan","doi":"10.62638/zasmat1011","DOIUrl":"https://doi.org/10.62638/zasmat1011","url":null,"abstract":"The pursuit of finely tuned material properties has driven the exploration of annealing strategies in the context of Samarium Silica Nanocomposites (Sm-SiO2 NCs) synthesized through the sol-gel route. This study unveils novel insights into the influence of optimized annealing protocols on the structural and functional evolution of these advanced nanocomposites. Through meticulous experimentation, we establish that controlled temperature annealing plays a pivotal role in tailoring the microstructure and properties of Sm-SiO2 NCs. The judicious manipulation of annealing parameters, including temperature duration, and atmosphere, orchestrates distinct transformations in the composite architecture. Field emission microscopy and structural analysis reveal that precise annealing promotes the consolidation of nanoscale domains, leading to improved crystallinity and enhanced connectivity between samarium species and the silica matrix. Moreover, the annealing-induced modifications extend beyond structural aspects to influence functional properties, an increase in crystallite size was observed from 15 nm to 43 nm as an effect of annealing. Our findings illustrate a remarkable enhancement in luminescence intensity as a consequence of optimized annealing, showcasing the potential for tailored photonic applications. These revelations are supported by a comprehensive suite of analytical techniques, including X-ray diffraction, Fourier transform infra red,Field emission with Energy dispersive x-ray and photoluminescence spectroscopy. The synthesis-annealing synergy not only advances our fundamental understanding of nanocomposite evolution but also furnishes a pathway towards designing multifunctional materials with precision-engineered attributes.","PeriodicalId":23842,"journal":{"name":"Zastita materijala","volume":"50 222","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140236994","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

Tuning low frequency dielectric properties of flexible ternary polymer blend film reinforced with bio- ionic liquid for the application in green electronics 调整生物离子液体增强的柔性三元聚合物共混薄膜的低频介电性能，以应用于绿色电子产品

Zastita materijala Pub Date : 2024-03-15 DOI: 10.62638/zasmat1001

V. Bhavsar, D. Tripathi

{"title":"Tuning low frequency dielectric properties of flexible ternary polymer blend film reinforced with bio- ionic liquid for the application in green electronics","authors":"V. Bhavsar, D. Tripathi","doi":"10.62638/zasmat1001","DOIUrl":"https://doi.org/10.62638/zasmat1001","url":null,"abstract":"Biofriendly conducting polymeric blends and composites exhibiting high dielectric constant and dielectric loss are promising for applications as sensors, actuators, microwave absorbing materials, fuel cells and biomedical applications. A great deal of work is reported on using fillers such as conductive nanomaterials, bio ceramics, carbon nanotubes, graphene etc in blends of Polyvinylchloride, Polyvinylpyrrolidone, Polymethylmethacrylate, Polyvinyl alcohol with conducting polymer Polypyrrole, Polyaniline for enhancing their conductivities, tailoring dielectric and electrical, thermal and surface properties of such polymeric materials. However, appropriate dispersion of such fillers in polymeric matrices remains technically challenging. In this regard, bio-ionic liquids have emerged as a novel class of materials and their combination with specific polymer blends opens the possibility to develop smart novel materials with different morphologies. Present work aims to explore the low frequency dielectric properties exhibited by free standing, flexible, biofriendly/biodegradable ternary polymer blend film of Polyvinylchloride-Polyvinylpyrrolidone-Polypyrrole reinforced with choline acetate. The detailed analysis of low frequency dielectric properties authenticates that addition of choline acetate result in modifying the dielectric properties of ternary polymer blend film.. The harmlessness of these films was confirmed from disk diffusion test indicating their benign nature towards (Escherichia coli) (CFT073) and (Bacillus subtilis). Therefore, the developed films can potentially be used for various scale multifunctional dielectric and electrical applications working in close contact with living matter, green electronics and various health monitoring systems.","PeriodicalId":23842,"journal":{"name":"Zastita materijala","volume":"46 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140237584","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

Electrochemical analysis of corrosion inhibition shallot leaf (Allium cepa) extract on mild steel in acidic medium at different immersion times 酸性介质中不同浸泡时间葱叶（Allium cepa）提取物对低碳钢的缓蚀电化学分析

Zastita materijala Pub Date : 2024-03-15 DOI: 10.62638/zasmat1006

S. Prifiharni, Amalia Rizky Sabilla, G. Priyotomo, A. Nikitasari, Rahayu Kusumastuti, S. Musabikha, R. N. Hakim, Y. Dwiyanti, B. Kambuna

引用次数: 0

Inhibition of corrosion of mild steel in simulated oil well waterby aqueous extract of Hibiscus rosa-sinensis flower 芙蓉花水提取物在模拟油井水中对低碳钢腐蚀的抑制作用

Zastita materijala Pub Date : 2024-03-15 DOI: 10.62638/zasmat1005

Balakrishnan Latha, Kaliyaperumal Kavitha, Rajendran Susai

{"title":"Inhibition of corrosion of mild steel in simulated oil well waterby aqueous extract of Hibiscus rosa-sinensis flower","authors":"Balakrishnan Latha, Kaliyaperumal Kavitha, Rajendran Susai","doi":"10.62638/zasmat1005","DOIUrl":"https://doi.org/10.62638/zasmat1005","url":null,"abstract":"controlling the corrosion of mild steel in simulated oil well water (SOWW). Weight loss method reveals that 10 % v/v of the extract offers 82 % inhibition efficiency (IE) to mild steel (MS) immersed SOWW. The mechanistic aspects of corrosion inhibitive effect have been investigated by polarization study and AC impedance spectra. Polarization study reveals that the mixed type of inhibitor in the presence of inhibitor system. The corrosion inhibition effect is confirmed by the increase in the linear polarization resistance value and decrease in the corrosion current value. The protective layer is formed on the metal surface is confirmed by the AC impedance spectra. This is confirmed by the fact that there is increase in charge transfer resistance value and decrease in the double layer capacitance value. The adsorption of inhibitor molecule obey Langmuir adsorption isotherm. The protective coating is characterized by FTIR spectroscopy. It confirms that the inhibitor has coordinated with ferrous ion the metal surface through the active principle component of β-sitosterol, quercetin and kaempferol-3-xylosylglucoside. The surface morphology has been investigated by scanning electron microscopy (SEM). Hence, aqueous extract of Hibiscus rosa-sinensis flower with simulated oil well water good corrosive inhibitive effect on pipeline made of mild steel.","PeriodicalId":23842,"journal":{"name":"Zastita materijala","volume":"8 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140238949","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

Electrochemical activities of Ni-Ti alloy in artificial blood plasma with Trigonella foenum graecum seeds 镍钛合金在人工血浆中与三叶草种子的电化学活性

Zastita materijala Pub Date : 2024-03-15 DOI: 10.62638/zasmat1004

Annamalai Selvam, Santiagu John, Mary, Asirvatham Ajila, Devadoss Delinta, Vijayagopal Sribharathy, Senthamarai Kannan Muthukumaran

引用次数: 0

Correct determination of the hydrogen evolution reaction parameters at Ni foam electrode modified by electrodeposited Ni-Sn alloy layer 正确测定电沉积镍硒合金层修饰的泡沫镍电极的氢演化反应参数

Zastita materijala Pub Date : 2024-03-15 DOI: 10.62638/zasmat1039

Jelena Gojgić, A. Petričević, M. N. Krstajić Pajić, V. Jović

引用次数: 0

Comparative analysis of geothermal binary ORC systems: performance and environmental considerations for CO2 andwater as geofluids 地热二元 ORC 系统比较分析：二氧化碳和水作为地质流体的性能和环境考虑因素

Zastita materijala Pub Date : 2024-03-15 DOI: 10.62638/zasmat1009

Nkemakolam Chinedu Izuwa, S. Ekwueme, N. Okereke, O. Nwanwe, N. Ohia

{"title":"Comparative analysis of geothermal binary ORC systems: performance and environmental considerations for CO2 andwater as geofluids","authors":"Nkemakolam Chinedu Izuwa, S. Ekwueme, N. Okereke, O. Nwanwe, N. Ohia","doi":"10.62638/zasmat1009","DOIUrl":"https://doi.org/10.62638/zasmat1009","url":null,"abstract":"This study considers the process simulation of geothermal binary Organic Rankine Cycle (ORC) systems which utilizes CO2 and water as geofluids for electricity generation. The simulation was performed using Hysys v11 software by using Peng Robinson’s fluid property package. Two dry working fluids including isopentane and n-pentane, were used. The effects of geofluid temperature and working fluid mass flowrate on power generation, as well as the maximum pressure of working fluids were evaluated. The result showed that power generation increases with higher geofluid temperature due to enhanced heat transfer. Isopentane outperformed n-pentane, attributed to its superior thermodynamic properties. CO2 showed better performance as geofluid than water highlighting its superiority, observed in the increased power generation. The unique characteristics of CO2 enable efficient heat transfer at lower temperatures, making it an environmentally friendly and effective choice. Contrarily, the use of water as a geofluid poses some implications for local ecosystems and water resources. From an environmental perspective, CO2 shows greater potential for reduced environmental impact, which aligns with the transition to cleaner energy sources. However, the economic considerations suggest a trade-off, as CO2 projects may entail higher upfront costs compared to water-based systems. Regulatory factors and economic feasibility, therefore, play a crucial role in the choice of geofluid for geothermal power generation.","PeriodicalId":23842,"journal":{"name":"Zastita materijala","volume":"21 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140239036","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