Review
Chemistry, Physical
Agnieszka Bigos, Monika Wolowicz, Marta Janusz-Skuza, Zbigniew Starowicz, Maciej Jakub Szczerba, Rafal Bogucki, Ewa Beltowska-Lehman
Summary: Coatings deposited from solutions based on environmentally-friendly citric acid and its salts offer an alternative to nickel coatings obtained from a Watts bath. Proper selection of citrate solution concentration, cathodic current density, and hydrodynamic conditions allows for the formation of homogeneous nanocrystalline coatings with high microhardness. The microstructure and surface morphology of coatings deposited from citrate baths differ significantly from those deposited from traditional Watts baths, resulting in higher microhardness for the former.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Shuai Yang, Zhaoyang Zhang, Kun Xu, Yucheng Wu, Hao Zhu, Wenrong Shen, Yang Liu
Summary: Ni-Co-W alloy is a promising material with excellent performance and wide application prospects. Electrochemical deposition and laser electrochemical deposition were utilized to fabricate Ni-Co-W alloy coatings. The variations in W content significantly influenced the coating's surface morphology, internal structure, and mechanical properties. The study also revealed that laser irradiation combined with a suitable W content can greatly enhance the corrosion resistance of the coatings.
Article
Chemistry, Physical
Michel J. R. Hache, Jason Tam, Uwe Erb, Yu Zou
Summary: High-entropy alloy (HEA) design is a promising approach to stabilize nanocrystalline materials with high strength and hardness. This study investigates the synthesis and characterization of electrodeposited HEAs from aqueous electrolytes, providing insights for developing new high-strength, thermally stable, and scalable nanostructured materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Multidisciplinary Sciences
Yu-Jyun Kao, Yu-Ju Li, Yu-An Shen, Chih-Ming Chen
Summary: In this study, the mechanical properties of Cu foils fabricated through electroplating with various SPS concentrations were examined using tensile tests. The SPS concentration affected the grain size of the Cu foils, resulting in different mechanical properties. A significant Hall-Petch effect was demonstrated, indicating the influence of grain size on the mechanical properties of the electroplated Cu foils.
SCIENTIFIC REPORTS
(2023)
Article
Materials Science, Coatings & Films
Peng Zhang, Yuhui Zhao, Jiale Huang, Jie Li, Lin Cao, Jianan Liu, Guofeng Han, Wenbo Du, Lihua Chen, Linlin Xiao, Qiwei Wang, Yingfei Yang, Sheng Zhu, Wei Li
Summary: Ni-W-SiC composite coatings with mixed nano- and micro-sized SiC particles were prepared using pulsed electrodeposition. The effects of the mixed ratios of nano- to micro-sized SiC on the microstructure, microhardness, wear and corrosion resistances of the coatings were studied. The results showed that nano-sized SiC can be incorporated into the coatings without agglomeration when carried by micro-sized SiC during the deposition process. The composite coatings with a mixture of nano- and micro-sized SiC exhibited improved wear resistance, while the coatings with the highest total SiC content showed the best corrosion resistance due to the blockage of Faradaic current by inert SiC particles. The interactions between nano- and micro-sized SiC during the deposition process were also discussed.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Chemistry, Physical
Wenxuan Qin, Xiaoli Xi, Liwen Zhang, Man Wang, Qinghua Zhang, Xintao Wang, Xuehua Wang, Zuoewn Nie
Summary: In this study, flat tungsten coatings with uniform grains were prepared via electrolytic tungsten in a ternary molten salt system. Dense tungsten coatings containing the second phase of ZrO2 were obtained by electrodeposition, resulting in improved mechanical properties and thermal cycle performance of the coatings. The reduction reactions of tungsten ions and zirconium ions during electrodeposition were investigated, revealing two-step processes for each ion.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Malay Kumar Das, Santhosh Kumar J. Urumarudappa, Sarwar Kamal, Yoanda Widiadita, Arif Mahamud, Thiranan Inthawong Saito, Thiti Bovornratanaraks
Summary: In this study, Ni-W/B nanocomposite coatings were successfully fabricated using pulse current electrodeposition. The effects of frequency and duty cycle on the microstructure and properties of the coatings were investigated. The results showed that pulse current electrodeposition resulted in better distribution and content of boron particles compared to direct current electrodeposition. The highest microhardness of 1122 HV was obtained at a frequency of 100 Hz and duty cycle of 30%.
Article
Materials Science, Coatings & Films
Pao-Chang Huang, Chih-Cheng Chou, Li-Shan Hsu
Summary: This study investigates the effect of electrodeposition parameters on Ni-W alloy coatings, determining optimal conditions for increased wear and friction resistance on piston rings. Results show that Ni-40.6 wt%W alloy exhibits improved mechanical and tribological properties compared to hard chromium coatings. The resistance of Ni-40.6 wt%W alloy coatings to wear and scratching on piston rings is confirmed through engine testing.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Physical
Dinesh K. Mahalingam, Parthasarathi Bera
Summary: Ni-W-P coatings electrodeposited from an acid gluconate bath were characterized by various physicochemical techniques. The addition of phosphorus influenced the amorphous structure of the coatings, while different deposition modes affected the structure, morphology, and elemental oxidation states. Heat treatment at different temperatures resulted in a substantial increase in microhardness comparable to hard chromium coating.
SURFACES AND INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Le Zhao, Meng Yuan, Ze Fan, Zhongquan Zhang, Guoying Wei
Summary: The temperature induced wear mechanism transition of electrodeposited Ni-Co-W alloy coatings has been investigated. The wear resistance of the coatings is enhanced at high temperature, and the wear mechanism changes from abrasive wear to mild oxidative wear.
Article
Engineering, Mechanical
Lavakumar Bathini, M. J. N. V. Prasad, Nitin P. Wasekar
Summary: Ni-W multilayer coatings consisting of alternate soft and hard layers with varying individual layer thickness were deposited using pulse reverse current electrodeposition. These coatings showed reduced residual stresses and maintained high hardness. The soft Ni-W layers effectively accommodated the generated residual stresses. The Ni-W multilayer coating with a specific thickness exhibited improved sliding wear resistance due to low residual stresses and effective thermal diffusion.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Chemistry, Physical
Bo Liu, Siming Yan, Yi He, Hongjie Li, Yi Fan, Teng He, Yuxin Xiang
Summary: This paper investigates the use of electrochemically prepared edge-oxidized graphene oxide (eGO) as nano-materials doped in Ni-W electrolyte solution, successfully preparing high-performance Ni-W-eGO coating on P110 carbon steel. Compared with the original Ni-W coating, the Ni-W-eGO composite coating significantly improves the corrosion resistance of the P110 steel sheet in a 3.5 wt% NaCl solution, with the optimal amount of eGO determined to be 0.5 g/L.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Physical
Qianlian Bao, Wenxin Zheng, Lian Chen, Zhenkai Xu, Jingliang Han, Chengfei Zhu
Summary: Nanocrystalline Ni-Mo coatings were electrodeposited on pure aluminum and the corrosion resistance was investigated under different conditions. The presence of molybdenum in coatings inhibited the pitting of aluminum, significantly reducing the corrosion rate compared to pure aluminum. Temperature was identified as a critical factor affecting the corrosion resistance performance of the coatings.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Physical
Piotr Ledwig, Malgorzata Kac, Agnieszka Kopia, Jan Falkus, Beata Dubiel
Summary: Ni-Co-Fe nanocrystalline coatings were electrodeposited from citrate-sulfate baths with different ion concentration ratios. The coatings showed high hardness and superior magnetic properties, making them promising for future applications in micromechanical devices.
Article
Chemistry, Analytical
Ya Tian, Liwen Ma, Xiaoli Xi, Zuoren Nie
Summary: In this study, Co-Mo-Ni-W alloy coatings were co-electrodeposited on a copper metallic substrate using electrolytes containing different systems of complexing agents. The addition of different complexing agents resulted in changes in the deposition potential and hardness of the coatings, as well as the Mo and W content in the coatings.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
V. S. Belkin, P. N. Belkin, B. L. Krit, N. Morozova, S. A. Silkin
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2020)
Article
Electrochemistry
S. A. Kusmanov, S. A. Silkin, P. N. Belkin
RUSSIAN JOURNAL OF ELECTROCHEMISTRY
(2020)
Article
Chemistry, Physical
Ramunas Levinas, Natalia Tsyntsaru, Henrikas Cesiulis
Article
Materials Science, Multidisciplinary
Modestas Vainoris, Henrikas Cesiulis, Natalia Tsyntsaru
Article
Chemistry, Physical
S. A. Kusmanov, I. V. Tambovskiy, S. A. Silkin, I. A. Kusmanova, P. N. Belkin
SURFACES AND INTERFACES
(2020)
Article
Materials Science, Multidisciplinary
Stanislav Belevskii, Serghei Silkin, Natalia Tsyntsaru, Henrikas Cesiulis, Alexandr Dikusar
Summary: Research on Fe-W alloys is increasing due to environmental concerns related to Ni and Co materials. The impact of Na2WO4 concentration on bath chemistry and electrode reactions in Fe-W alloy electrodeposition was studied using RDE, CV, and EQCM. It was found that Fe-W alloy formation is thermodynamically feasible at specific potentials, and the deposition process can be described by mixed kinetics. The concentration of Na2WO4 influences the kinetic and diffusion currents during electrodeposition.
Article
Materials Science, Multidisciplinary
Kestutis Mazeika, Jonas Reklaitis, Aliona Nicolenco, Modestas Vainoris, Natalia Tsyntsaru, Henrikas Cesiulis
Summary: The research focused on studying the morphology and magnetic properties of Fe films electrodeposited at different temperatures. The Fe films deposited at 20 degrees C exhibited finer and more disordered structure compared to those deposited at 65 degrees C, and showed significant changes in magnetization under the influence of a perpendicular magnetic field.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Electrochemistry
Aliaksei Bakavets, Yauhen Aniskevich, Genady Ragoisha, Alexander Mazanik, Natalia Tsyntsaru, Henrikas Cesiulis, Eugene Streltsov
Summary: This study demonstrates selective electrochemical dissolution of bismuth interlayers in (Bi-2)(m)(Bi2Te3)(n) superlattices, providing insights into thermoelectric materials design based on bismuth telluride. It reveals different variations of the electrochemical interface area in the superlattices with initial bismuth content, offering potential for new strategies in material design.
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
Aliona Nicolenco, Yu Chen, Natalia Tsyntsaru, Henrikas Cesiulis, Eva Pellicer, Jordi Sort
Summary: In this study, Fe-Ga films with macroporous structure were prepared by electrodeposition on metallized silicon substrates templated with sub-micrometer-sized polystyrene spheres, showing larger magnetic-field-induced crystal deformation compared to non-templated and fully-dense films. These effects in porous Fe-Ga films are promising for the design of various strain-engineered nanomaterials.
MATERIALS & DESIGN
(2021)
Article
Chemistry, Multidisciplinary
Modestas Vainoris, Aliona Nicolenco, Natalia Tsyntsaru, Elizabeth Podlaha-Murphy, Francisco Alcaide, Henrikas Cesiulis
Summary: The textile industry is a major contributor to environmental pollution in many countries, particularly through the discharge of untreated textile dyes into water. This study investigated the use of Fe/Cu catalysts in the heterogeneous Fenton's reaction for degrading high concentrations of methyl orange dye in water. The results show that both the surface area and catalyst loading play a significant role in the effective degradation of the dye. The experimental findings suggest that a solution containing up to 100 mg/L of methyl orange can be successfully decolorized within 90 s at 50 degrees C using porous Fe/Cu catalysts, surpassing current state-of-the-art performance.
FRONTIERS IN CHEMISTRY
(2022)
Review
Electrochemistry
Alexandr Dikusar, Anatolii Cuharuc, Natalia Tsyntsaru
Summary: The scientific school of Alexander Frumkin, a world-renowned electrochemist from Chisinau, played a crucial role in the development of electrochemical science in Moldova. Through national and European cooperation, Moldovan electrochemists have made significant contributions in areas such as high-rate anodic dissolution, plasma electrochemical treatment, and electrical methods for mass transfer control. This review highlights the achievements of Moldovan researchers in the academic-industrial collaboration and their impact on the global information process.
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Ramunas Levinas, Natalia Tsyntsaru, Henrikas Cesiulis, Roman Viter, Karlis Grundsteins, Loreta Tamasauskaite-Tamasiunaite, Eugenijus Norkus
Summary: Photo-/electrochemical water splitting is a suitable method for producing green hydrogen and oxygen using renewable energy or direct sunlight. In this study, WO3/MoSx heterostructured materials were synthesized by plasma electrolytic oxidation (PEO), and their activities for photoelectrochemical (PEC) and hydrogen evolution reaction (HER) water splitting were evaluated.
Article
Materials Science, Multidisciplinary
Henrikas Cesiulis, Natalia Tsyntsaru
Summary: The increase in waste electrical and electronic equipment (WEEE) has led to the need for efficient metal recovery to ensure a secure supply of raw materials and contribute to a circular economy. However, the lack of environmentally friendly technologies for WEEE treatment is hindering recycling efforts. This paper reviews current eco-friendly technologies for the recovery of gold, silver, copper, and tin by electrowinning, with a focus on tin recovery as a case study. The use of citric acid-containing leachates as an environmentally friendly process for tin electrowinning is discussed, although further steps are needed to address the interference of other metals in the scraps.
Article
Engineering, Mechanical
Iurii Benkovsky, Natalia Tsyntsaru, Serhii Silkin, Vladimir Petrenko, Vidas Pakstas, Henrikas Cesiulis, Alexandr Dikusar
Summary: The electrospark deposition (ESD) technique is a promising low-heat-input process for coating applications and part restoration. Carbon steels can be used as the electrode tool for ESD process. Electrodeposition is investigated to reduce the roughness of ESD coatings. Hybrid coatings consisting of ESD layer and electrodeposited Ni layer were successfully obtained, showing comparable wear rate with NiCr coatings and higher corrosion resistance than ESD coatings.
Article
Electrochemistry
P. N. Belkin, S. A. Silkin, I. G. D'yakov, S. V. Burov, S. A. Kusmanov
SURFACE ENGINEERING AND APPLIED ELECTROCHEMISTRY
(2020)
