Article
Materials Science, Coatings & Films
Runjia Liu, Yan Liu, Qiwen Yong, Zhi-Hui Xie, Liang Wu, Chuan-Jian Zhong
Summary: The long-term corrosion resistance of conventional micro-arc oxidation (MAO) coatings on magnesium alloy is limited by the inherent micro-scale pores. Zeolitic imidazolate framework-8 (ZIF-8) and zinc gluconate (ZnG) loaded ZIF-8 (ZnG@ZIF-8) were synthesized and incorporated into the MAO coating to enhance the corrosion resistance. The (ZIF-8 + ZnG@ZIF-8)/MAO composite coating showed significant improvement in corrosion protection compared to the blank MAO coating.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Chemistry, Physical
Jiyuan Zhu, Haojie Jia, Kaijin Liao, Xianxuan Li
Summary: The study improved the corrosion resistance and friction resistance of magnesium alloy micro-arc oxidation coatings by sealing with hydrothermal treatment and heat treatment, enhancing their performance in 3.5 wt% NaCl aqueous solution. This method is of great significance for promoting the application of magnesium alloys in industrial production.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Jing Wang, Jinhe Dou, Zhongchao Wang, Cheng Hu, Jiurong Liu, Huijun Yu, Chuanzhong Chen
Summary: The influence of sodium fluoride (NaF) concentration in silicate basic electrolyte on the corrosion resistance and biodegradability of micro-arc oxidation (MAO) coatings on Mg2Zn-Mn (ZM21) alloys was investigated. The results showed that increasing NaF concentration to 1.0 g/L resulted in a thicker and more hydrophilic MAO coating. Adding 1.0 g/L NaF enhanced corrosion resistance and adhesion, while excessive NaF concentration (> 1.0 g/L) reduced breakdown voltage and degraded coating quality. The MAO samples demonstrated reduced weight loss rate and pH value after immersion, indicating certain biological safety; and cytotoxicity and cell adhesion tests confirmed their biocompatibility.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Coatings & Films
Shih-Yen Huang, Yu-Ren Chu, Shun-Han Yang, Yueh-Lien Lee
Summary: This study is the first to examine the role of pause time following anodic and cathodic polarization in a MAO process for magnesium alloys. The results demonstrate that anodic pause time enhances the corrosion resistance of these alloys compared to their cathodic counterpart.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Jing Wang, Zhongchao Wang, Jinhe Dou, Yongkang Li, Cheng Hu, Huijun Yu, Chuanzhong Chen
Summary: In this study, Mg-2Zn-Mn alloy was surface modified using micro-arc oxidation (MAO) technique. The influence of potassium fluotitanate (K2TiF6) concentration in silicate basic electrolyte on the corrosion resistance and degradation of MAO coatings was investigated. It was found that TiF62- has a thickening effect on the coatings, and adding 0.25 and 0.50 g/L K2TiF6 results in better corrosion resistance. TiF62- concentration also affects the coating quality through the generation of F-. Anatase TiO2 formed by ionization of TiF62- plays a role in sealing the micro-pores of the MAO coating. The surface-modified Mg alloy exhibits improved hydrophilicity, reduced weight loss rate and pH value after immersion, and improved biocompatibility.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Yuna Xue, Xin Pang, Seyyed Mohamad Hasan Karparvarfard, Hamid Jahed, Sheji Luo, Yi Shen
Summary: The influences of forging process and micro-arc oxidation (MAO) coating on the corrosion behavior of ZK60 wrought magnesium alloys were investigated. The results showed that forging temperature affected the microstructure and corrosion resistance of the alloy. The MAO coating provided effective corrosion protection and improved stress-corrosion resistance.
Article
Materials Science, Multidisciplinary
Xinxin Jin, Di Mei, Dongfang Chen, Yaqian Li, Liguo Wang, Shijie Zhu, Shaokang Guan
Summary: Incorporating degradable calcium phosphate beta-TCP in the MAO coating enhances the corrosion resistance and biocompatibility, providing a strategy to improve the properties of magnesium alloy for orthopedic applications.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Applied
Ruozheng Wang, Chen Zhao, Zhenjun Peng, Xiaoyan Yan, Yuchen Sun, Qiangliang Yu, Bo Yu, Meirong Cai, Feng Zhou
Summary: A multifunctional organic/inorganic hybrid coating was prepared on AZ31 magnesium alloy by microarc oxidation and vapor deposition of Polyp-xylene. The coating exhibited excellent corrosion resistance and lubricating properties, offering promising application prospects for surface protection of magnesium alloys.
PROGRESS IN ORGANIC COATINGS
(2024)
Article
Chemistry, Applied
Mohsen Ghafarzadeh, Mahshid Kharaziha, Masoud Atapour
Summary: The study found that the bilayer MAO-PGS coatings significantly improved the corrosion resistance and biocompatibility of the AZ91 alloy. Different electrospraying times had a significant impact on the coating properties, with the 3-hour coating showing the best performance. Noticeably, the adhesion strength of the MAO-PGS coating was directly modulated by the PGS coating time.
PROGRESS IN ORGANIC COATINGS
(2021)
Article
Chemistry, Physical
Shuaikang Yang, Chen Wang, Fuzhen Li, Naihao Liu, Putong Shi, Baojin Wang, Ruixue Sun
Summary: Micro-arc oxidation (MAO) is an effective and environmentally friendly method for generating dense and homogeneous coatings with high corrosion resistance on magnesium alloys. However, the porous structure of MAO coatings can lead to reduced corrosion resistance due to the invasion of corrosive media. In this study, a novel one-step in situ growth of a pore-sealing coating on MAO-coated AZ31B alloy was achieved by hydrothermal treatment. The resulting coating effectively seals the micro-pores and micro-cracks of the MAO coating and exhibits improved corrosion resistance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Biophysics
Chunlin Li, Xiaohong Yao, Ruiqiang Hang, Xiangyu Zhang
Summary: In this study, nanostructured OCP coatings with variable structures were successfully prepared on MAO coated Mg by chemical deposition in a solution containing trace PO43- ions. The morphology and thickness of OCP coating can be regulated by varying deposition time, with the thinnest coating showing the best cytocompatibility at 0.5 h and the thickest coating showing the best corrosion resistance and mineralization at 2 h. These results demonstrate the potential for tailored OCP coatings to meet different clinical requirements by adjusting deposition time.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Dongjie Liu, Jing Liu, Guangyu Liu, Yuntao Xie, Zongfan Duan
Summary: The corrosion resistance of micro-arc oxidation coating can be enhanced by surface modification. In this study, LDH/MAO film with a micro-/nano-structure is formed on AZ31 magnesium alloy surface by controlling the composition and concentration of the hydrothermal solution. A superhydrophobic surface is achieved by coating an OTES modifier on the LDH/MAO film. The composite coatings exhibit improved corrosion resistance due to the sealing of defects and superhydrophobic effect.
Article
Biochemistry & Molecular Biology
Tianlu Li, Yun Zhao, Minfang Chen
Summary: The study investigated the influence of different treating current densities on the corrosion resistance and photo-thermal antibacterial properties of micro-arc oxidation coatings. The results showed that a current density of 30 A·dm(-2) exhibited the best performance in terms of corrosion resistance, light absorption capacity, photo-thermal capability, and antibacterial activity against S. aureus and E. coli.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Materials Science, Coatings & Films
Ekaterina S. Marchenko, Arina A. Shishelova, Pavel I. Butyagin, Ivan I. Gordienko, Anton P. Khrustalev, Svetlana S. Arbuzova, Ilya A. Zhukov, Gulsharat A. Baigonakova, Alex A. Volinsky
Summary: This study investigates the effects of electrolyte exposure time on phase composition, biodegradation, and biocompatibility during micro-arc oxidation of the Mg-Ca-Zn alloy. The results show that micro-arc oxidation can form a dense coating with a gradient structure, and the amorphous component of the coating increases with exposure time. The coated Mg-Ca-Zn samples exhibit reduced weight loss in vitro and high biocompatibility in animal experiments.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Mariya B. Sedelnikova, Anna Ugodchikova, Tatiana Tolkacheva, Valentina V. Chebodaeva, Ivan A. Cluklhov, Margarita A. Khimich, Olga Bakina, Marat Lerner, Vladimir S. Egorkin, Juergen Schmidt, Yurii P. Sharkeev
Summary: Biodegradable materials and calcium silicate-based ceramics are important materials for implants in reconstructive medicine. Research has shown that silicate biocoatings formed on a Mg0.8Ca alloy exhibit remarkable anti-corrosion properties and reduce the toxicity of the alloy.
Article
Materials Science, Multidisciplinary
Polina Metalnikov, Guy Ben-Hamu, Kwang Seon Shin
Summary: This study investigated the effect of varying Zn additions on the corrosion resistance of wrought Mg-5Al alloys, identifying three secondary phases that contribute to changes in the corrosion behavior. While short periods of immersion are characterized by pitting corrosion, long periods lead to the formation of a protective layer and filiform corrosion in alloys with higher Zn content. The micro-galvanic effects continue to play a crucial role in deteriorating corrosion resistance in alloys with relatively high Zn content, depending on the behavior of the cathodic particles and their total number on the alloy's surface.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Metallurgy & Metallurgical Engineering
Hui Yu, Shaoda Fan, Shuaiju Meng, Jae Ok Choi, Zhongjie Li, Yohan Go, Young Min Kim, Weimin Zhao, Bong Sun You, Kwang Seon Shin
Summary: The microstructures and mechanical properties of Mg-xBi alloys were investigated, showing changes with increasing Bi content. The alloys exhibit fully dynamic recrystallization, decreased grain size, and increased nano-scale Mg3Bi2 precipitates with higher Bi content. Additionally, Bi addition improves the strength and ductility of the alloys, with tensile elongation showing a trend based on Bi content.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Chemistry, Physical
Ahmad Bahmani, Srinivasan Arthanari, Kwang Seon Shin
Summary: A corrosion-resistant Mg alloy was developed using multi-directional forging (MDF), which exhibited a lower corrosion rate compared to high purity Mg. The lowest corrosion rate was observed for the alloy MDFed at 300 degrees C.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
M. Sabbaghian, R. Mahmudi, K. S. Shin
Summary: The study investigated the effect of adding 1 wt pct Gd on the microstructural evolution, mechanical properties and bio-corrosion behavior of a biodegradable Mg-4Zn alloy. The addition of Gd resulted in finer grain size, enhanced textural hardening, and significantly improved mechanical properties. Electron backscattered diffraction analysis showed higher pitting susceptibility in the corroded surfaces of the Gd-containing alloy.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
X. R. Dong, H. Yu, S. M. Kang, W. Yu, B. A. Jiang, D. Chen, Z. F. Wang, F. X. Yin, K. S. Shin
Summary: The study found that central segregation in Mg98.15Y1Zn0.85 alloy will disappear and reappear during the annealing process.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Kristian Mathis, Michal Knapek, Filip Siska, Petr Harcuba, David Ugi, Peter Dusan Ispanovity, Istvan Groma, Kwang Seon Shin
Summary: Micro-deformation testing on single-crystal Mg micropillars revealed the dynamics of mechanical twinning formation, from nucleation to thickening and coalescence of twins. The study showed that the critical thickness of a twin must be reached before triggering the nucleation of another twin, and the lateral growth rates of twins were found to be on the order of 10(-5)-10(-4) m/s.
MATERIALS & DESIGN
(2021)
Article
Materials Science, Multidisciplinary
H. Yu, X. R. Dong, S. M. Kang, W. Yu, Z. F. Wang, J. Y. Mu, X. W. Cui, J. H. Li, F. X. Yin, K. S. Shin
Summary: The pre-homogenization treatment of as-extruded Mg-Y alloys significantly affects their mechanical properties, with higher temperatures improving the mechanical properties but higher Y content accelerating micro-galvanic effects. Pre-homogenization at 500 degrees Celsius enhances corrosion resistance in the alloys.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Multidisciplinary
Hui Yu, Hao Liu, Binan Jiang, Wei Yu, Shaoming Kang, Weili Cheng, Sunghyuk Park, Dong Chen, Fuxing Yin, Kwangseon Shin, Jinyao Mu, Xiongwei Cui, Jianghai Li
Summary: The addition of bismuth refines the grain size and accelerates the dynamic recrystallization process of the magnesium alloy, depending on the deformation temperature rather than the strain rate.
Article
Materials Science, Multidisciplinary
Polina Metalnikov, Guy Ben-Hamu, Kwang Seon Shin, Amir Eliezer
Summary: Magnesium (Mg) alloys have potential applications in improving fuel efficiency in automotive and aircraft industries due to their low density. However, the corrosion behavior of Mg and its alloys is a significant concern, and in this study, the addition of calcium (Ca) to wrought AM60 alloy was found to deteriorate corrosion resistance in a NaCl solution but improve it in the absence of Cl- ions. The study also discussed the impact of long-term immersion on corrosion behavior and alloy oxidation.
Article
Materials Science, Multidisciplinary
Hong Liu, Fengxiang Lin, Pei Liu, Yuan Yue, Kwang Seon Shin, Liming Peng, Laurent Delannay, Jian-Feng Nie, Nele Moelans
Summary: This study focuses on twining in magnesium, particularly the variant selection of primary-secondary twin pairs and the underlying causes. Through crystallographic analysis and calculation methods, the stress field distribution characteristics in primary-secondary twin pairs are revealed, as well as the impact of different stress components on twin transmission.
Article
Materials Science, Multidisciplinary
Hui Yu, Xin Yang, Wei Yu, Youngmin Kim, Shaoming Kang, Lixin Huang, Bongsun You, Chunhai Liu, Kwangseon Shin, Weimin Zhao
Summary: This study investigates the microstructure and corrosion behavior of AM60 alloys with/without Ca and Y addition under gravity casting and high-pressure die-casting. It is found that the AM alloy produced by high-pressure die-casting has better corrosion resistance. The study provides insights for developing high corrosion-resistant magnesium alloys using different casting methods.
Review
Chemistry, Physical
Lifei Wang, Jianzhong He, Jiawen Yu, Srinivasan Arthanari, Huseung Lee, Hua Zhang, Liwei Lu, Guangsheng Huang, Bin Xing, Hongxia Wang, Kwang-Seon Shin
Summary: This article reviews the corrosion resistance of magnesium (Mg) alloys as biomaterials and summarizes various approaches to control corrosion and biological performance. The in vivo implantations of Mg alloy vascular stents and the issues that have emerged are also introduced. It is recommended to further investigate the corrosion mechanisms, control impurities and micro-alloy element concentrations, develop new grain refinement methods, and consider the development of multifunctional coatings.
Article
Chemistry, Physical
Viacheslav Bazhenov, Anna Li, Stanislav Tavolzhanskii, Andrey Bazlov, Natalia Tabachkova, Andrey Koltygin, Alexander Komissarov, Kwang Seon Shin
Summary: Magnesium alloys are potential materials for temporary fixation devices in osteosynthesis due to their similar density and Young's modulus to cortical bone. In this study, Mg-Zn-Ga-(Y) alloys were prepared by hot extrusion and their microstructure and mechanical properties were investigated. The results showed that the Mg-Zn-Ga-(Y) alloys exhibited favorable mechanical properties and bone regeneration ability.
Article
Materials Science, Multidisciplinary
Stanislav O. Rogachev, Viacheslav E. Bazhenov, Alexander A. Komissarov, Anna V. Li, Denis V. Ten, Viacheslav V. Yushchuk, Alexey Yu. Drobyshev, Kwang Seon Shin
Summary: The effect of hot rolling on the structure and mechanical properties of three Mg-Y-Zn-Mn alloys was investigated by varying process temperature and reduction ratio. Cast WZM111, WZM211, and WZM321 alloys were rolled from an initial thickness of 7 mm to a final thickness of 0.2 mm at temperatures of 400 and 450 degrees C. Characterization of the material was done using optical and scanning electron microscopy, microhardness measurement, and tensile testing. Rolling regimes that achieved a balance between strength and ductility of the alloys were established.
Article
Engineering, Biomedical
Viacheslav Bazhenov, Anna Li, Artem Iliasov, Vasily Bautin, Sofia Plegunova, Andrey Koltygin, Alexander Komissarov, Maxim Abakumov, Nikolay Redko, Kwang Seon Shin
Summary: This study investigates the corrosion rate and biocompatibility of Mg-Zn-Ga-(Y) alloys prepared by hot extrusion. The results show that these alloys have low corrosion rate and good biocompatibility, making them suitable for osteosynthesis implants.
JOURNAL OF FUNCTIONAL BIOMATERIALS
(2022)
