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
Luyao Xu, Dejian Zhang, Huijuan Su, Peng Yu, Yong Wan, Huilai Sun
Summary: This study investigated the effects of pullulan concentration in electrolyte solutions on the corrosion and tribocorrosion performance of AZ31B magnesium alloys after plasma electrolytic oxidization (PEO) treatment. The results showed that the addition of pullulan enhanced the compactness of the PEO coating, resulting in improved corrosion resistance and anti-tribocorrosion performance. The PEO coating produced in electrolyte solution containing 1.0 g/L pullulan exhibited the best overall performance.
SURFACE & COATINGS TECHNOLOGY
(2022)
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
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
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
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
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
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)
Article
Materials Science, Multidisciplinary
L. Toro, A. A. Zuleta, E. Correa, F. Echeverria
Summary: In this study, the corrosion resistance of AZ31 magnesium alloy was improved by post-treating a PEO coating in different solutions. The morphology and chemical composition of the resulting coatings were analyzed, and it was found that pore sealing treatment in a solution containing a mixture of NaF and NaAlO2 significantly increased the corrosion resistance of the coating.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Materials Science, Coatings & Films
Yupeng Zhang, You Lv, Bing Liu, Xiangkang Cao, Xiaoze Ma, Teruo Hashimoto, Shengjie Wang, Zehua Dong, Xinxin Zhang
Summary: A novel plasma electrolytic oxidation (PEO) treatment was proposed to improve the corrosion resistance and biocompatibility of Mg-Ag alloy, while achieving a cytotoxicity-free antibacterial capability.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Coatings & Films
Jinhe Dou, Jing Wang, Huancai Li, Yupeng Lu, Huijun Yu, Chuanzhong Chen
Summary: Plasma electrolytic oxidation (PEO) is an effective surface treatment technique for enhancing the corrosion resistance of Mg alloy, but the micro-pores and micro-cracks of the PEO coating can limit its protection capability. In this study, a dense Ca3Al2(OH)(12) layer was fabricated on the PEO coating surface using hydrothermal treatment (HT) to create a PEO/HT composite coating, which showed improved bioactivity and corrosion resistance compared to PEO coating and Mg alloy. The growth process of the Ca3Al2(OH)(12) layer on the PEO coating surface was discussed.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Su Pan, Xiaohua Tu, Jianxing Yu, Yang Zhang, Chengping Miao, Yaling Xu, Rui Fu, Jiayou Li
Summary: This study investigated the optimization of NaOH-Na2SiO3-Na2B4O7 electrolyte for the plasma electrolytic oxidation of AZ31B magnesium alloy. The results showed that NaOH had a significant effect on film thickness, while Na2SiO3 had the greatest impact on corrosion resistance. The optimized electrical parameters resulted in a uniform and compact anodized coating, with improved corrosion properties compared to the substrate.
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
Materials Science, Coatings & Films
Qi Chen, Yun Zheng, Shuai Dong, Xiao-Bo Chen, Jie Dong
Summary: This study investigated the influence of fluoride ions on the growth of PEO/Ni-P composite coating on magnesium alloy AZ31B. It was found that fluoride ions can increase the thickness and compactness of the PEO coating but hinder direct EN plating, with Ni-P nodules selectively nucleating in the micro-pores of the PEO layer. The PEO/Ni-P composite coating provides superior corrosion protection to the magnesium substrate.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Electrochemistry
Wenhai Tan, Youfeng Zhang, Yichen Zhang, Yanbo Ma, Chao Zhao, Yinling Wang
Summary: This study synthesized Co3O4/CC cathode materials with excellent performance for aqueous zinc-ion batteries by varying the reactant concentration. The Co3O4/CC nanowires exhibited uniform distribution, regular surface, and small size on the carbon cloth. The battery assembled with Co3O4/CC material synthesized at a reactant concentration ratio of 2:1 showed better performance, with high discharge specific capacity and capacity retention rate.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2024)
Article
Electrochemistry
T. Salahuddin, Iqra Kousar, Mair Khan, M. Munawwar Iqbal Ch
Summary: This paper investigates the dynamics of fluid motion powered by cilia within a curved channel and examines the chemical reactions occurring in the presence of electro-osmotic impact. The findings offer insights into various flow characteristics and present a method for simulating non-Newtonian fluid models in three dimensions. Additionally, the model has potential applications in the development of micro-vascular chips, which could be crucial for diagnosing blood-related issues.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2024)
Review
Electrochemistry
Ahmed Abou-Shady
Summary: Soil electrokinetic (SEK) is a significant technology with various applications in fields such as soil remediation, pollutant removal, and water regulation. This review summarizes the recent advancements in SEK, focusing on electrode modifications and material additives, and suggests future research directions.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2024)
