Article
Chemistry, Physical
Ting Wu, Carsten Blawert, Maria Serdechnova, Polina Karlova, Gleb Dovzhenko, D. C. Florian Wieland, Stevan Stojadinovic, Rastko Vasilic, Kristina Mojsilovic, Mikhail L. Zheludkevich
Summary: The development of PEO surface treatments for Nb enables the production of functional coatings with a combination of new compositions and phases. The coatings mainly consist of Nb2O5, with additional oxides or phosphates present in certain electrolytes. Coatings produced in silicate-containing electrolyte exhibit the highest photocatalytic activity and improved corrosion resistance.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Viorel Malinovschi, Alexandru Horia Marin, Catalin Ducu, Sorin Moga, Victor Andrei, Elisabeta Coaca, Valentin Craciun, Mihail Lungu, Cristian P. Lungu
Summary: In this study, a plasma electrolytic oxidation technique was used to form an aluminum oxide coating on the surface of commercially pure titanium. The coating exhibited high hardness and adhesive critical load, and significantly improved corrosion resistance in a corrosive solution.
Article
Materials Science, Coatings & Films
Yang Zhao, Yuebo Li, Tengfei Yin, Tao Zhang, Fuhui Wang
Summary: The post-treatment processes of plasma electrolytic oxidation (PEO) coatings were investigated for their corrosion behaviors and adhesion strength. The results showed that when the PEO coating was treated with high-temperature oxidation (HTO) and mix of silane coupling agent (SCA) and benzotriazole (BTA), it exhibited optimal corrosion behaviors and adhesion strength. The HTO treatment at 150 degrees Celsius showed superior long-term performance.
SURFACE & COATINGS TECHNOLOGY
(2023)
Review
Chemistry, Multidisciplinary
Soumya Sikdar, Pramod Menezes, Raven Maccione, Timo Jacob, Pradeep L. Menezes
Summary: Plasma electrolytic oxidation (PEO) is a novel surface treatment process used to produce thick, dense metal oxide coatings on light metals to improve their wear and corrosion resistance. The PEO process is widely employed in mechanical, petrochemical, and biomedical industries due to its superior characteristics. Recently, PEO process has also been utilized to produce nanocomposite coatings, showing promising developments in this field.
Article
Materials Science, Coatings & Films
S. Moga, V. Malinovschi, A. Marin, E. Coaca, D. Negrea, Valentin Craciun, Mihail Lungu
Summary: By using the PEO process in galvanostatic mode, magnesium oxide coatings (up to 182 μm) were successfully produced on AZ63 alloy. XRD, XPS, and SEM were used to evaluate the coatings' structure, chemical composition, and morphology. The results showed that mixed-crystalline magnesium oxide formed porous PEO layers with increased hardness and improved corrosion resistance on pure AZ63 alloy, with values of 26.9 GPa and 2.0 μA/cm2 indicating noticeable performance characteristics.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Materials Science, Coatings & Films
M. Serdechnova, C. Blawert, S. Karpushenkov, L. Karpushenkava, T. Shulha, P. Karlova, R. Vasilic, S. Stojadinovic, S. Stojanovic, Lj Damjanovic-Vasilic, V Heitmann, S. M. Rabchynski, M. L. Zheludkevich
Summary: PEO coatings were successfully formed on zinc alloy in a phosphate aluminate electrolyte, containing varying mixtures of ZnO and ZnAl2O4. The coatings showed internal porosity and low cohesion, limiting their photocatalytic activity. Composite coatings of ZnO and ZnAl2O4 spinel displayed higher activity but were not sufficient for fast and effective catalytic cleaning applications.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Metallurgy & Metallurgical Engineering
Ting Wu, Carsten Blawert, Xiaopeng Lu, Maria Serdechnova, Mikhail L. Zheludkevich
Summary: The presence of Li and Li-rich phases were found to be crucial for the treatment result on MgLi alloy's coating growth, rather than the original lattice structure. The modified discharge behavior of MgLi alloy led to a different microstructure of the coating, making it more susceptible to dissolution.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Review
Materials Science, Multidisciplinary
Vijayan Sobhana Dilimon, Sheik Muhammadhu Aboobakar Shibli
Summary: Plasma electrolytic oxidation (PEO) coatings are widely used and their modifications are usually targeted towards specific applications. However, the evaluation of PEO coatings often focuses solely on the intended application without considering other potential uses. Electrochemical impedance spectroscopy (EIS) is a powerful technique for assessing PEO coatings, as it can analyze their structural, morphological, chemical, and electrochemical properties. Therefore, a comprehensive review describing the versatile behavior of PEO coatings using EIS is essential for researchers and engineers to evaluate PEO coatings beyond their intended applications.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Coatings & Films
M. Mohedano, B. Mingo, H. Mora-Sanchez, E. Matykina, R. Arrabal
Summary: A significant reduction in energy consumption of Plasma Electrolytic Oxidation (PEO) coatings on AA6082 alloy was achieved by changing electrolyte selection and precursor anodic film, with coatings synthesized under high-energy efficient conditions having comparable corrosion performance to conventional PEO processes.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Luca Casanova, Livio Vicentini, MariaPia Pedeferri, Marco Ormellese
Summary: The study showed that anodisation of titanium grade 2 at high voltage (220 V), high frequency (1000 Hz) and high level of anodic polarisation (90%) can promote the formation of thicker oxides with rough architecture. Additionally, it was verified that this approach is particularly advantageous for localized and uniform corrosion.
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
(2021)
Article
Metallurgy & Metallurgical Engineering
Lujun Zhu, Hongzhan Li, Qingmei Ma, Jiangbo Lu, Zhengxian Li
Summary: PEO coatings were prepared on Mg alloys in electrolyte containing different concentrations of NaF addition. The introduction of NaF led to the formation of a fluoride-containing nanolayer (FNL) at the Mg/coating interface. The thickness and MgF2 content of the FNL increased with the increase in NaF concentration. PEO coating anodized in the electrolyte with 2 g/L NaF showed the highest corrosion performance. Anodizing in electrolyte with low NaF concentration resulted in thin and discontinuous FNL, which decreased the pore density and increased the coating's uniformness.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
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
Materials Science, Coatings & Films
Ge Zhang, Khashayar Khanlari, Shan Huang, Xiaosong Li, Dapeng Zhao, Hong Wu, Yuankui Cao, Bin Liu, Qianli Huang
Summary: In this study, equi-atomic Ti-Nb-Ta-Zr-Hf bio-HEA was subjected to plasma electrolytic oxidation (PEO) at different voltages. The resulting coatings showed different microstructures and exhibited different wear and corrosion resistance. The PEO-200 V treated group showed the best wear resistance, while the PEO-150 V treated group showed the best corrosion resistance. In vitro experiments confirmed the favorable cytocompatibility of the PEO-treated surfaces.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Chemistry, Physical
D. V. Mashtalyar, K. V. Nadaraia, I. M. Imshinetskiy, E. A. Belov, V. S. Filonina, S. N. Suchkov, S. L. Sinebryukhov, S. V. Gnedenkov
Summary: The study developed a method for restoring protective coating of pure titanium, damaged due to long-term operation, through plasma electrolytic oxidation and subsequent polymer treatment. The research showed that composite coatings with polytetrafluoroethylene have higher corrosion resistance, wear resistance, and hydrophobicity, compared to thermal coatings.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Qi Han, Yan Li, Xiaopeng Lu, Di Mei, Qianqian Chen, Tao Zhang, Fuhui Wang
Summary: Antibacterial plasma electrolytic oxidation coatings incorporating partially oxidized Ag particles on pure Mg effectively inhibit the growth of S. aureus, with the antibacterial efficiency mainly dependent on the Ag concentration in the layer. The antibacterial rate of the coating can reach 99% and remain stable when sufficient Ag particles (above 1 wt%) are incorporated.
Article
Materials Science, Ceramics
Mohsen Soleimani, Arash Fattah-alhosseini, Hassan Elmkhah, Kazem Babaei, Omid Imantalab
Summary: This study evaluates the tribological and corrosion behavior of nano-structured CrN/CrAlN and CrCN/CrAlCN coatings applied on 430 stainless steel. The coatings were characterized using X-ray diffraction, field emission scanning electron microscopy, and nano-indentation techniques. The adhesion of the coatings to the substrate was also evaluated. The results showed that CrCN/CrAlCN exhibited the lowest friction coefficient and better resistance against corrosion compared to the CrN/CrAlN coating, which can be attributed to its higher hardness, denser structure, lower surface roughness, and low wettability.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Yemurai Vengesa, Arash Fattah-alhosseini, Hassan Elmkhah, Omid Imantalab, Mohsen K. Keshavarz
Summary: This study investigated the tribological and corrosion performances of as-deposited and annealed CrN/CrAlN multilayer coatings on 304 stainless steel substrates deposited by cathodic arc evaporation process. The results showed that annealing led to the decomposition of CrN into Cr2N. Additionally, the surface roughness and wettability of the annealed samples increased as the annealing temperature increased. The hardness decreased due to the increase in crystallite size. The sample annealed at 400 degrees C exhibited the lowest wear rate and the specimen annealed at 700 degrees C showed the highest corrosion resistance.
CERAMICS INTERNATIONAL
(2023)
Article
Metallurgy & Metallurgical Engineering
Mosab Kaseem, Tehseen Zehra, Tassawar Hussain, Young Gun Ko, Arash Fattah-alhosseini
Summary: This work investigated the influence of sealing treatment on the structural and electrochemical properties of AZ31 Mg alloy coated by plasma electrolytic oxidation (PEO). The results showed that sealing in hot solutions triggered hydration reactions and promoted the incorporation of Co3O4 into the coating. In contrast, sealing in cold solutions resulted in less compact coatings. A nearly fully sealed coating with high electrochemical stability was successfully formed in the hot solution containing 1 gr of cobalt nitrate hexahydrate.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Metallurgy & Metallurgical Engineering
Mosab Kaseem, Tehseen Zehra, Burak Dikici, Ali Dafali, Arash Fattah-alhosseini
Summary: The formation of inorganic-organic hybrids (IOH) on metallic substrates plays a crucial role in improving their structural and functional features. In this study, an organic coating (OC) consisting of coumarin-3-carboxylic acid (3-CCA) and albumin (ALB) was grown on an inorganic layer (IC) produced by plasma electrolysis of AZ31 Mg alloy. The synergistic actions between OC and IC resulted in the formation of a flake-like structure that sealed the structural defects of IC and provided chemical protection and photocatalytic performance.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Review
Automation & Control Systems
Haniyeh Fayazfar, Javid Sharifi, Mohsen K. Keshavarz, Mazyar Ansari
Summary: Since the introduction of additive manufacturing (AM), significant progress has been made in technological advancements and characteristics of components. However, metal AM faces barriers in industrial adoption due to poor surface quality and imperfections. Improving surface post-treatment methods is necessary to enhance surface quality and fill the knowledge gap for AM industrial adoption. This review provides an overview of research efforts, gaps, and opportunities in surface enhancement of AM metals, focusing on solution-based approaches for improving surface roughness of intricate metal 3D-printed parts and evaluating their impact on functional properties.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Erfan Lotfi-Khojasteh, Hassan Elmkhah, Meisam Nouri, Omid Imantalab, Arash Fattah-Alhosseini
Summary: The wear and electrochemical behaviors of CrN/AlCrN multilayered coatings annealed at different temperatures were investigated in this study. The deposition of the coatings was done using the cathodic arc evaporation technique. Characterization techniques such as SEM, field emission SEM, X-ray diffraction, and Rockwell-C indenter were used to analyze the coatings and the interdiffusion between the layers. The results showed that the interdiffusion of the layers increased with increasing annealing temperature, leading to changes in mechanical and corrosion properties of the coatings.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Mosab Kaseem, Arash Fattah-alhosseini
Summary: This study investigates the effect of iron nitrate on the corrosion behavior of a 6061 Al alloy treated with a plasma electrolytic oxidation coating. PEO coatings were applied on Al alloy samples using an alkaline-aluminate electrolyte with and without iron nitrate. The presence of iron nitrate resulted in the integration of Fe2O3 particles into the coating layer and reduced the porosity and size of micropores formed during plasma activity. As a result, the coating formed in the electrolyte with iron nitrate exhibited superior corrosion resistance compared to the one without iron nitrate.
Article
Materials Science, Ceramics
Maryam Sadat Sharifiyan, Arash Fattah-Alhosseini, Minoo Karbasi
Summary: WO3 nanoparticles were grown hydrothermally on porous titania (TiO2) PEO-coated on Ti in an alkaline electrolyte using pulsed direct current mode. The hydrothermal parameters including precursor concentration, temperature, and time were optimized to achieve the best photodegradation of methylene blue mediated by the PEO/HT hybrid coatings under visible illumination. The improvement in photocatalytic performance was attributed to the participation of more WO3 nanoparticles and the expansion of the light absorption range of TiO2 up to the visible light range.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Environmental
Hamed Bahramian, Arash Fattah-alhosseini, Minoo Karbasi, Elham Nikoomanzari, Stefanos Giannakis
Summary: In this study, copper oxide-embedded TiO2 coatings were introduced on pure titanium through plasma electrolytic oxidation, which exhibited photocatalytic capacity for tetracycline degradation. The impact of ionization process and temperature on the photocatalytic efficiency were investigated. Coatings containing CuO nanoparticles showed finer micropores, higher specific areas, and higher wettability. The highest photocatalytic efficiency reached 70% and could be increased to 92% under specific conditions.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Hamed Bahramian, Arash Fattah-alhosseini, Minoo Karbasi
Summary: TiO2/CuO coatings were applied on pure titanium using PEO method to investigate their photocatalytic capacity for methylene blue degradation. The study also explored the effect of ionization process at room temperature on the coatings' photocatalytic efficiency. Coatings containing CuO nanoparticles exhibited a more porous morphology, and the addition of ionized CuO nanoparticles resulted in the formation of anatase, rutile, CuO, and TiP2O7 phases. The introduction of ionized CuO nanoparticles significantly increased the photocatalytic efficiency, and the optimum coating maintained its performance even after multiple runs.
APPLIED SURFACE SCIENCE ADVANCES
(2023)
Review
Chemistry, Physical
Arash Fattah-Alhosseini, Maryam Molaei
Summary: This article mainly introduces the use of hybrid surface modification techniques to enhance the performance of titanium dental and orthopedic implants, and discusses in depth the application of laser processing and plasma electrolytic oxidation technology in this area.
APPLIED SURFACE SCIENCE ADVANCES
(2023)
Article
Chemistry, Physical
Amirhossein Ghorbani, Hassan Elmkhah, Omid Imantalab, Mostafa Meghdari, Meisam Nouri, Arash Fattah-Alhosseini
Summary: This study investigated the effects of wet microblasting on the tribological and electrochemical properties of CrN/CrAlN nanolayered coatings. The results showed that microblasting treatment improved the wear resistance and corrosion resistance of the coatings.
APPLIED SURFACE SCIENCE ADVANCES
(2023)
Article
Chemistry, Inorganic & Nuclear
Ahmad Keyvani, Neda Kamkar, Razieh Chaharmahali, Milad Bahamirian, Mosab Kaseem, Arash Fattah-alhosseini
Summary: Orthopaedic implants often use magnesium and its alloys, which have better mechanical compatibility with bone tissue but lower corrosion resistance. This study investigated the use of plasma electrolytic oxidation (PEO) to modify the surface of AZ31 magnesium alloy and examined the effects of different concentrations of hydroxyapatite (HA) nanoparticles on coating morphology and corrosion characteristics. The sample with 3 g/l HA showed the best anticorrosion performance with the smallest average pore size, thickest coating, and lowest corrosion current density.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Reza Hosseini, Arash Fattah-alhosseini, Minoo Karbasi, Stefanos Giannakis
Summary: In this study, a visible light-responsive black TiO2 photocatalytic coating with controlled formation of oxygen vacancies and Ti3+ species was developed to enhance photocatalytic reactions. By precisely controlling semiconductor defects, electron/hole recombination is reduced and the band gap is narrowed, leading to improved catalytic efficiency. The results demonstrate exceptional stability and effectiveness of the coating in tetracycline degradation.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
