Article
Materials Science, Multidisciplinary
Yu-Jui Lin, Chao-Sung Lin
Summary: The corrosion behavior and corrosion rate of friction stir welded AZ31B magnesium alloy and 6N01 aluminum alloy dissimilar joints were studied using real-time imaging, potentiodynamic polarization, EIS, and hydrogen evolution tests. The corrosion rate was found to increase in the order of Al base metal < Mg base metal < stirred zone. The galvanic coupling of the Mg phase to other phases enhanced the corrosion of both base metals, and intense corrosion at BM-AZ31B elevated the interfacial pH due to water reduction on the cathodic particles of BM-6N01.
Article
Multidisciplinary Sciences
Venkateshkumar Prabhakaran, Lyndi Strange, Rajib Kalsar, Olga A. Marina, Piyush Upadhyay, Vineet V. Joshi
Summary: Developing strategies to prevent corrosion at the interface of dissimilar metal alloys is challenging. This study utilized scanning electrochemical cell impedance microscopy (SECCIM) to investigate the corrosion in the interfacial region of AZ31 magnesium alloy and DP590 steel welded using the Friction-stir Assisted Scribe Technique (FAST). The research found that the interfacial region differs chemically and microstructurally from bare AZ31 and DP590, and by measuring corrosion kinetics and electrochemical impedance spectroscopy, deeper insights into the interfacial region were gained, which can help prevent corrosion in dissimilar metal structures.
SCIENTIFIC REPORTS
(2023)
Article
Electrochemistry
Vishwas Goel, David Montiel, Katsuyo Thornton
Summary: In this study, a phase-field model is used to investigate the corrosion behavior of Mg alloys. The effects of electrochemical properties, environment, and the spatial distribution of second phases are studied. Microstructure variations are also examined in 2D and 3D systems. The findings provide insights into the influence of two-phase microstructure on the corrosion behavior in a magnesium alloy.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Hongjian Lu, Weifeng Xu, Huan Wang, Xian-Zong Wang
Summary: This study investigates the microstructural heterogeneity in the weld nugget zone (WNZ) of dissimilar AA7050-AA2024 friction stir welding joint and its impact on galvanic corrosion (GC). The increase in solid-solutioned Zn content and the number of intergranular MgZn2 significantly worsens the corrosion resistance of local AA7050-WNZ, while the grain refinement and fragmented Al2Cu slightly improves that of local AA2024-WNZ. The heterogeneous micro-structure evolution lowers the GC resistance of global WNZ, causing the severest GC at WNZ-bottom with lowest resistance. The GC and intergranular corrosion synergistically promote the dissolution process. This work provides an insight into GC of dissimilar joint from microstructural heterogeneity.
Article
Chemistry, Physical
Qing Li, Yanbo Wang, Funian Mo, Donghong Wang, Guojin Liang, Yuwei Zhao, Qi Yang, Zhaodong Huang, Chunyi Zhi
Summary: The study highlights the practical issues that may arise when using Zn foil for studying the stability and dendrite formation behavior of Zn anodes, suggesting that a Zn powder/current collector configuration is more practical. The research also reveals that during the aging process of the Zn-P@Cu electrode, hydrogen forms on the surface of Cu and the Zn-P dissolves, leading to morphological changes, which are attributed to galvanic corrosion between Cu and Zn.
ADVANCED ENERGY MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Hua-bao Yang, Liang Wu, Bin Jiang, Bin Lei, Ming Yuan, Hong-mei Xie, Andrej Atrens, Jiang-feng Song, Guang-sheng Huang, Fu-sheng Pan
Summary: The microstructure of Mg-Sn-Y alloys, including small grain size, uniform distribution of small second phase particles, and specific grain orientation, plays a crucial role in determining their discharge properties in Mg-air batteries. The presence of effective cathodes like Sn3Y5 and MgSnY phases promotes micro-galvanic corrosion, leading to the dissolution of the Mg matrix during discharge process.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Isao Nakatsugawa, Yasumasa Chino
Summary: The study evaluated the galvanic corrosion at the joint of AZX611 magnesium and A6N01 aluminum in 1% NaCl solution with different cathode/anode area ratios. It was found that the anode galvanic current density and weight loss corrosion rates increased with the area ratio in a linear relationship. The presence of anode current spots also increased with the area ratio, as observed by Scanning Vibration Electrode Technology (SVET).
MATERIALS TRANSACTIONS
(2021)
Article
Materials Science, Multidisciplinary
Yi-Xing Zhu, Guang-Ling Song, Peng-Peng Wu, Da-Jiang Zheng, Zi-Ming Wang
Summary: Research shows that surface burnishing and alloying of magnesium can result in a thicker and more uniform aluminum-enriched surface layer, which significantly enhances micro-hardness and corrosion resistance. This method helps to address the galvanic corrosion issue with magnesium alloys in engineering applications.
Article
Materials Science, Multidisciplinary
Bing Lei, Mingxiao Peng, Ling Liu, Shengnan Hu, Wei Zhang, Guozhe Meng
Summary: The galvanic corrosion of the porous multi-layer Al-BN abradable coating system is mainly influenced by the deposition of its corrosion products, leading to a three-stage process in chloride solution.
Article
Engineering, Manufacturing
Bo Pan, Hui Sun, Shun-Li Shang, Weiling Wen, Mihaela Banu, Joseph C. Simmer, Blair E. Carlson, Nannan Chen, Zi-Kui Liu, Zhuoyuan Zheng, Pingfeng Wang, Jingjing Li
Summary: This paper investigated the corrosion behavior of aluminum alloy/galvanized steel joints fabricated by different methods exposed to salt-spray cycles, highlighting the impact of crevice on corrosion behavior and the difference in corrosion between RSW and SPR joints. The stable corrosion products of Al and Zn-Fe alloy, as well as additional observed corrosion products, were explained using Pourbaix diagrams, metastable corrosion products, and possible chemical reactions.
JOURNAL OF MANUFACTURING PROCESSES
(2021)
Article
Engineering, Environmental
Yu-Chi Chang, Jun-Yen Uan
Summary: The study found that using Mg alloy waste can reduce Ni2+ in Ni-plating wastewater to metallic Ni, with Mg17Al12 playing a critical role in promoting the reduction reaction. By utilizing Mg alloy waste, the concentration of Ni2+ ions can be quickly reduced to a desirable level.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Physical
Zuzana Gabalcova, Peter Gogola, Zaneta Gerhatova, Marian Palcut
Summary: In this study, the corrosion behavior of Mg2Sn alloy in different corrosion media was investigated. The highest corrosion rate was observed in the HCl solution, while the corrosion rate decreased with increasing pH of the electrolyte. Passivation of the alloy was observed in the NaOH solution. The corrosion of the alloy involved simultaneous oxidation of magnesium and tin.
Article
Chemistry, Physical
Radha Rajendran, Sreekanth Dondapati
Summary: This study focuses on the microstructural evolution, mechanical behavior, corrosion resistance, and bioactivity response of Mg-Sn alloys with different Sn contents. Results show that the addition of 5wt.% Sn significantly improves the properties of the alloy, making it a promising candidate for orthopedic implant applications.
Article
Engineering, Biomedical
Claudia Garcia-Mintegui, Laura Catalina Cordoba, Judit Buxadera-Palomero, Andrea Marquina, Emilio Jimenez-Pique, Maria-Pau Ginebra, Jose Luis Cortina, Marta Pegueroles
Summary: This study investigates the mechanical properties, biodegradability and biocompatibility of Zn-Mg and Zn-Cu alloys for potential use in bioresorbable cardiovascular stents. The addition of Mg or Cu alloying elements refines the microstructure of Zn while improving yield strength and ultimate tensile strength. Both Zn-1Mg and Zn-Cu alloys showed promising results in terms of degradation stability and antibacterial effects.
BIOACTIVE MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Xiang Chen, Xinjie Peng, Xinjian Yuan, Ziliu Xiong, Yue Lu, Shenghai Lu, Jian Peng
Summary: This study investigated the effects of Zn-Al-Mg coating on the resistance spot-welding joint properties of HC340LAD + ZM steel plates. It was found that the mechanical properties of the welding joints were slightly affected by the Zn-Al-Mg coating, but the corrosion resistance of the coated plate was significantly improved.
APPLIED SCIENCES-BASEL
(2022)
