Article
Materials Science, Coatings & Films
Xiaopeng Lu, Jirui Ma, Marta Mohedano, Borja Pillado, Raul Arrabal, Kun Qian, Yan Li, Tao Zhang, Fuhui Wang
Summary: The study showed that sealing plasma electrolytic oxidation (PEO) coatings on AZ91 Mg alloy in calcium nitrate solutions at different pH values can enhance the corrosion resistance of the coatings. Adding SDS facilitates the formation of precipitates, resulting in hydrophobic coatings with poorer paint adhesion but better corrosion resistance.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Coatings & Films
Joel da Silva Rodrigues, Leonardo Marasca Antonini, Antonio Alexandre da Cunha Bastos, Jie Zhou, Celia de Fraga Malfatti
Summary: The study applied plasma electrolytic oxidation (PEO) to create a coating on a magnesium alloy, ZK30, enhancing its corrosion resistance and wear resistance for potential orthopedic applications involving friction and wear. This technology has shown promising results in reducing hydrogen release, decreasing susceptibility to localized corrosion, and altering surface topography and chemistry.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Coatings & Films
Chao Yang, Jiayu Zhu, Suihan Cui, Pinghu Chen, Zhongcan Wu, Zhengyong Ma, Ricky K. Y. Fu, Xiubo Tian, Paul K. Chu, Zhongzhen Wu
Summary: By using zinc-containing phosphate electrolyte for plasma electrolytic oxidation of aluminum alloys, the corrosion resistance, surface hardness, and wear resistance of the coatings are simultaneously improved, resulting in enhanced durability and corrosion resistance of the components.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Physical
A. Keyvani, M. Zamani, M. Bahamirian, E. Nikoomanzari, A. Fattah-alhosseini, H. Sina
Summary: Ceramic coatings were deposited on AZ31 magnesium alloys using PEO technique, and the addition of ZnO nanoparticles improved the corrosion resistance of the coatings in Hank's solution. The best results were obtained with an electrolyte containing 6 g/l ZnO nanoparticles, showing a corrosion current density of 0.08 mu A/cm(2) and a corrosion potential of -1.4615 V-Ag/AgCl. Additionally, EIS results indicated a corrosion resistance of 1.05 x 10(6) Omega.cm(2) for the mentioned coating.
SURFACES AND INTERFACES
(2021)
Article
Materials Science, Coatings & Films
Anton Polunin, Alisa O. Cheretaeva, Eugeny D. Borgardt, Igor A. Rastegaev, Mikhail M. Krishtal, Alexander Katsman, Igor S. Yasnikov
Summary: The incorporation of TiC NPs significantly improved the hardness, effective elastic modulus, wear resistance, and corrosion resistance of the oxide layer, while also increasing the layer thickness. This enhancement was attributed to the chemically inert incorporation of particles and an increase in layer crystallinity.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Coatings & Films
Chao Yang, Hu Cai, Suihan Cui, Jian Huang, Jiayu Zhu, Zhongcan Wu, Zhengyong Ma, Ricky K. Y. Fu, Liyuan Sheng, Xiubo Tian, Paul K. Chu, Zhongzhen Wu
Summary: This study improves the corrosion resistance of AZ31B magnesium alloy by coating it with a plasma electrolytic oxidation (PEO) film and modifying it with insoluble zinc phosphate. The combination of PEO and zinc phosphate enhances the corrosion resistance and significantly increases the lifetime of the magnesium alloy.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Chen Ma, Dong Wang, Jinyu Liu, Ning Peng, Wei Shang, Yuqing Wen
Summary: Plasma electrochemical oxidation (PEO) is used to create ceramic coatings on magnesium alloys. This study introduces a new method for in-situ sealing of PEO coatings using four-layer voltage and sol addition. The characterization of the coatings showed decreased porosity and increased thickness, leading to improved corrosion resistance. The self-sealing behavior of PEO was also explained in this article.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Lkhagvaa Telmenbayar, Adam Gopal Ramu, Tumur-Ochir Erdenebat, Dongjin Choi
Summary: By adding different concentrations of lanthanum and using a GPTMS layer to modify PEO coatings, the corrosion resistance of the coatings can be significantly improved, reducing porosity and enhancing resistance to corrosive solutions.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Applied
Tianlu Li, Fengdong Sun, Yun Zhao, Minfang Chen
Summary: In this study, a two-step treatment involving SiO2 gel and hexadecyltrimethoxysilane was used to modify PEO coatings on AZ91 alloy. The treatment effectively sealed the microholes in the PEO coating, resulting in a dense coating with improved hydrophobicity. The corrosion resistance of the substrate alloy was significantly enhanced, making it a promising approach for post-treatment of PEO coatings.
PROGRESS IN ORGANIC COATINGS
(2023)
Article
Chemistry, Physical
S. Ignjatovic, C. Blawert, M. Serdechnova, S. Karpushenkov, M. Damjanovic, P. Karlova, D. C. F. Wieland, M. Starykevich, S. Stojanovic, Lj Damjanovic-Vasilic, M. L. Zheludkevich
Summary: The PEO treatment time affects the thickness and surface morphology of the plasma electrolytic oxidation coating, but does not significantly affect the phase composition. The additional addition of anatase particles can increase the amount of anatase in the coatings, but has minor effect on corrosion resistance while reducing wear resistance remarkably.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Yeji Shin, Kichang Bae, Sumin Lee, Hweeyong Kim, Dongmin Shin, Donghyun Kim, Eunyoung Choi, Hyoung-Seok Moon, Junghoon Lee
Summary: In this study, a multifunctional porous surface with water repellency and lubricating effect was achieved by impregnating silicone oil into a plasma electrolytic oxidized aluminum alloy surface. The surface exhibited enhanced corrosion resistance and improved wear resistance due to the presence of silicone oil within the porous oxide layer.
Article
Materials Science, Coatings & Films
Jiaping Han, Yucheng Yu, Junjie Yang, Xiaopeng Lu, Carsten Blawert, Mikhail L. Zheludkevich
Summary: In this study, La2O3 nano-particles were added into the PEO electrolyte to enhance the corrosion and wear resistance of pure magnesium. The incorporation of particles led to a decrease in porosity and thickness of the coating, resulting in improved corrosion and wear performance.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Metallurgy & Metallurgical Engineering
Rabia Kara, Huseyin Zengin
Summary: This study investigated the microstructure, tribological and electrochemical corrosion properties of plasma electrolytic oxidation (PEO) coatings with various amounts of carbon nanotube (CNT) additives on AZ80 magnesium alloy substrate in silicate-based electrolyte. The results showed that increasing CNT additions led to thicker coating layers. The addition of 0.5 g/L CNT resulted in a slight decrease in roughness before increasing again. The wear resistance of the PEO-coated specimens improved with increasing CNT-incorporation. The best corrosion resistance was achieved with the addition of 0.5 g/L CNT.
ACTA METALLURGICA SINICA-ENGLISH LETTERS
(2022)
Article
Engineering, Chemical
Lukasz Florczak, Ginter Nawrat, Kazimierz Darowicki, Jacek Ryl, Jan Sieniawski, Malgorzata Wierzbinska, Krzysztof Raga, Andrzej Sobkowiak
Summary: Plasma electrolytic oxidation is an effective method for improving the wear and corrosion resistance of magnesium alloys. The addition of NaBF4 and NaF to the electrolyte enhances the corrosion resistance of the protective layer, with NaBF4 showing the best results.
Article
Materials Science, Coatings & Films
Xiaohe Liu, Lei Liu, Shuai Dong, Xiao-Bo Chen, Jie Dong
Summary: Ultra-high frequency electrolytic oxidation can reduce the pore area of PEO coatings and improve their corrosion resistance. PEO coatings obtained at low frequency consist of an inner barrier layer and an outer porous layer, while ultra-high frequency PEO coatings are divided into three layers.
SURFACE & COATINGS TECHNOLOGY
(2022)
Review
Chemistry, Multidisciplinary
Gabriella Salviulo, Maria Cristina Lavagnolo, Manuele Dabala, Enrico Bernardo, Antonino Polimeno, Mauro Sambi, Franco Bonollo, Silvia Gross
Summary: Circular economy is seen as a new opportunity to build a more sustainable world socially and economically. This essay discusses the potential contribution of inorganic chemistry to the smooth transition towards circularity in inorganic materials design and production through an interdisciplinary approach.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Materials Science, Multidisciplinary
Mirko Pigato, Luca Pezzato, Claudio Cason, Manuele Dabala
Summary: This study demonstrates that by optimizing thermo-mechanical processes, it is possible to achieve gold alloys with properties comparable to those obtained with grain refiners. The research focused on evaluating grain growth in annealing processes, examining the casting phase, and the effect of different cooling rates. Results showed that with proper optimization, gold alloys without grain refiners can achieve similar properties to those with iridium as a grain refiner.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Engineering, Mechanical
Arshad Yazdanpanah, Mattia Franceschi, Gianluca Bergamo, Massimiliano Bonesso, Manuele Dabala
Summary: This study investigated the SCC and electrochemical behavior of selective laser melted 316L stainless steel under the combined effect of surface residual stresses and energy input variation. It was found that there was a significant correlation between columnar subgrains width and pore size with the electrochemical response and SCC susceptibility. A critical pore size affecting local corrosion behavior was identified, which decreased with an increase in residual stress magnitude.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Optics
S. Azmi, O. Ait Layachi, M. E. Ouardi, E. M. Khoumri, A. Moujib, A. E. Brouzi, M. Nohair, L. Pezzato, M. Dabala
Summary: The substrate significantly affects the properties of CZTS thin films, with CZTS films deposited on Mo substrate being more suitable for CZTS-based solar cells due to their crystallinity, good morphology, and suitable energy bandgap around 1.6 eV.
Article
Materials Science, Multidisciplinary
Roman A. Kussa, Vadym Zurnadzhy, Manuele Dabala, Mattia Franceschi, Vasily G. Efremenko, Ivan Petryshynets, Frantisek Kromka, Michail N. Brykov
Summary: This study compares the structure and mechanical properties of different alloyed steels to evaluate the effect of additional alloying elements on transformation kinetics and tensile/impact behavior. The results show that adding Cr, Mo, and V elements can increase the incubation time of pearlite and bainite, leading to improved mechanical properties and a better combination of strength and ductility/impact toughness.
KOVOVE MATERIALY-METALLIC MATERIALS
(2022)
Article
Chemistry, Physical
Lorena Kostelac, Luca Pezzato, Alessio Giorgio Settimi, Mattia Franceschi, Claudio Gennari, Katya Brunelli, Chiara Rampazzo, Manuele Dabala
Summary: In this study, bioactive coatings were produced on grade 2 titanium alloy using plasma electrolytic oxidation (PEO) process. The effects of KOH addition to electrolyte and working in direct or pulsed current mode were investigated. The coatings exhibited improved corrosion resistance and cell adhesion compared to the untreated sample.
SURFACES AND INTERFACES
(2022)
Article
Biochemistry & Molecular Biology
Enrico Cortese, Alessandro Galenda, Alessia Famengo, Luca Cappellin, Marco Roverso, Alessio G. Settimi, Manuele Dabala, Diego De Stefani, Alessandro Fassina, Gianluigi Serianni, Vanni Antoni, Lorella Navazio
Summary: Non-thermal plasma technology is increasingly being used in the field of plant biology. This study investigated the mechanisms of plant perception of plasma-activated water (PAW) and found that it triggers intracellular calcium signals in plants. The occurrence and characteristics of these signals depend on the operational conditions and chemical composition of PAW. These findings have important implications for using PAW to induce stress resilience in plants.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Physical
Arshad Yazdanpanah, Mattia Franceschi, Pietro Rebesan, Manuele Dabala
Summary: The study investigated stress corrosion cracking (SCC) of laser powder bed fusion-fabricated 316L with different types of defects. Electrochemical polarization measurements were conducted to examine the effect of defect type on corrosion and SCC behavior. The results showed severe localized corrosion and SCC initiation in specimens with a lack of fusion pores, with different morphology of SCC depending on the type of defects.
Article
Materials Science, Multidisciplinary
Vadym Zurnadzhy, Vasily Efremenko, Ivan Petryshynets, Manuele Dabala, Mattia Franceschi, Kaiming Wu, Frantisek Kovac, Yuliia Chabak, Viktor Puchy, Michail Brykov
Summary: This study analyzes the effect of intercritical annealing temperature on the structure and properties of TRIP-assisted steel. The addition of (Cr, Mo, and V) complex significantly improves the hardenability of the steel. At lower annealing temperatures, the precipitation of coarse cementite lowers the strength and ductility of the steel. At higher annealing temperatures, carbide-free bainite is formed, increasing the amount of retained austenite.
Article
Nanoscience & Nanotechnology
Mattia Franceschi, Rachele Bertolini, Alberto Fabrizi, Manuele Dabala, Luca Pezzato
Summary: The effect of ausforming temperatures on bainite morphology was studied on a newly developed carbide-free high-silicon steel. It was found that reducing the deformation temperature prior to bainitic transformation increased the strength of the undercooled austenite and decreased the maximum volume fraction of bainitic ferrite. The deformation temperature also had a significant impact on the morphology of bainite, including the length of sheaves, the reciprocal orientation of the bainitic plates, and crystallographic orientation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Chemistry, Physical
Luca Pezzato, Alessio Giorgio Settimi, Daniel Fanchin, Emanuela Moschin, Isabella Moro, Manuele Dabala
Summary: In this study, PEO coatings were produced on zinc-aluminized carbon steels using copper particles. The presence of sub-micrometric copper particles, obtained with pulsed current, significantly increased the number of embedded particles in the coating. The samples exhibited significant antifouling properties within the first 20 days of immersion. However, the presence of particles reduced the corrosion resistance compared to the samples without particles, although it remained higher than the untreated sample.
Article
Materials Science, Multidisciplinary
Gianluca Di Egidio, Lavinia Tonelli, Alessandro Morri, Iuri Boromei, Pavel Shashkov, Carla Martini
Summary: In the last decades, various anodizing processes have been proposed for Mg alloys, with Electro-Chemical Oxidation (ECO) showing superior performance in terms of wear and corrosion resistance compared to Plasma Electrolytic Oxidation (PEO). This study investigates the influence of ECO treatment on the tribological behavior and cyclic mechanical performance of RE-containing Mg alloy EV31A-T6. The results show that ECO-treated alloy exhibits improved wear resistance, lower coefficient of friction, and higher fatigue strength compared to both untreated and PEO-treated alloys.
Article
Chemistry, Physical
Gianluca Di Egidio, Carla Martini, Johan Borjesson, Ehsan Ghassemali, Lorella Ceschini, Alessandro Morri
Summary: There is a lack of systematic studies on the correlation between alloy microstructure and mechanical failure for the AlSi10Mg alloy produced by laser-based powder bed fusion (L-PBF). This study investigates the fracture mechanisms of the alloy in different conditions and after various heat treatments. In-situ tensile tests combined with electron backscattering diffraction were conducted to analyze the crack nucleation and growth. The results showed that the T6 heat treatment formed a discrete globular Si morphology, which improved the mechanical performance due to the more homogeneous distribution of finer Si particles.
Article
Chemistry, Physical
Chiara Petiti, Carla Martini, Cristina Chiavari, Silvia Vettori, Jean Marie Welter, Paulina Guzman Garcia Lascurain, Sara Goidanich
Summary: The San Carlo Colossus, known as San Carlone, is a monument made of wrought iron and copper. After more than 300 years of outdoor exposure, the iron elements of the monument showed minimal galvanic corrosion despite direct contact with copper. The study revealed that the corrosion resistance of the iron is due to its noble corrosion potential, while areas of corrosion were attributed to environmental factors.
Article
Materials Science, Multidisciplinary
Francesca Valentini, Luca Pezzato, Manuele Dabala, Katya Brunelli
Summary: Plasma electrolytic oxidation (PEO) with various corrosion inhibitor additives was conducted on SLM-produced AlSi10Mg alloy, and the effects of these additives on coating properties were investigated. The results showed that the additives could significantly modify the coatings and enhance their corrosion resistance.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
