Article
Chemistry, Physical
Peixu Yang, Songbo Ye, Baojing Feng, Jinhui Liu, Sensen Huang, Guonan Liu, Weidong Zhang, Weineng Tang, Shijie Zhu, Shaojun Zhang
Summary: The study found that the Mg2Ca phase acts as a microanode in microgalvanic corrosion in both NaCl and Na2SO4 solutions, accelerating corrosion of the adjacent Mg matrix, while Cl- and SO42- have different sensibilities to microgalvanic corrosion.
Article
Crystallography
Daria Palgan, Anna Dobkowska, Aleksandra Zielinska, Daria Drozdenko, Kristian Mathis, Wojciech Swieszkowski
Summary: The corrosion performance of Mg-LPSO alloys was found to be related to both the volume and distribution of LPSO structures in the alloy. Pitting was identified as the main corrosion mechanism in chloride-containing solutions, with microgalvanic corrosion accelerated by increasing chloride concentration.
Article
Materials Science, Multidisciplinary
Kang Meng, Kai Guo, Qiang Yu, Dun Miao, Chuan Yao, Qingfeng Wang, Tiansheng Wang
Summary: The corrosion behavior of Ti-6Al-3Nb-2Zr-1Mo alloy in HCl solution is affected by annealing temperature, with higher temperatures enhancing corrosion resistance. Lower annealing temperatures result in higher corrosion rates.
Article
Chemistry, Physical
Bangjun Li, Jiapeng Sun, Bingqian Xu, Guosong Wu
Summary: This paper investigates the corrosion behavior of Mg-5.7Gd-1.9Ag alloy sheets in a salt solution. The results show that the rolled sheets exhibit better corrosion resistance compared to the as-cast sheets. Aging treatment decreases corrosion resistance, but it still remains higher than that of the as-cast sheets. The migration of corrosion is mainly influenced by the evolution of second phases rather than grain size and texture.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Jaeho Kwon, Soo-Min Baek, Hoseok Jung, Jong Chan Kim, Si-Young Lee, Sung Soo Park
Summary: The corrosion resistance of hot-rolled Mg?8Sn?1Al?1Zn alloy was significantly enhanced by Sm microalloying, mainly due to a reduced H2 evolution rate caused by the presence of Al8Fe4Sm particles instead of Al5Fe2 particles which accelerate microgalvanic corrosion.
Article
Materials Science, Multidisciplinary
Gui-Jia Gao, Mei-Qi Zeng, En-Liang Zhang, Rong-Chang Zeng, Lan-Yue Cui, Dao-kui Xu, Feng-Qin Wang, M. Bobby Kannan
Summary: The microstructure and chemical compositions of solid solution-treated Mg-3Nd-1Li-0.2Zn alloy were investigated, and corrosion behavior was studied under different conditions. Results showed changes in grain size and volume fraction of the second phase under different treatments, with the formation of Nd-containing oxide film and dense corrosion product layer on the alloy surface.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Metallurgy & Metallurgical Engineering
Yuzhou Du, Xin Wang, Dongjie Liu, Wanting Sun, Bailing Jiang
Summary: The present study investigates the corrosion behavior of a Mg-Zn-Ca-La alloy. Results indicate that the corrosion resistance is enhanced by rolling deformation and subsequent annealing treatment significantly. The microstructure, distribution of second phase, and grain orientation are the main factors affecting corrosion properties.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Metallurgy & Metallurgical Engineering
B. Pillado, B. Mingo, R. del Olmo, E. Matykina, A. M. Kooijman, Y. Gonzalez-Garcia, R. Arrabal, M. Mohedano
Summary: Zinc aluminium (Zn-Al) and lithium aluminium (Li-Al) - layered double hydroxides (LDH) coatings with incorporated inhibitors (Li -, Mo- and W-based) were successfully synthesized on AZ31 Mg alloy. Zn -Al LDH W and Li -Al LDH Li showed the highest corrosion resistance and were selected for further evaluation.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Crystallography
Talal Talib Alshammari, Muhammad Farzik Ijaz, Hamad F. Alharbi, Mahmoud S. Soliman
Summary: The influence of magnesium (Mg) on the mechanical properties and corrosion behavior of Al-4Cu-xMg-0.6Ag alloys was investigated. The microstructure formed after the aging process was identified using Optical Microscope, SEM, XRD analysis, and Thermo-Calc simulation. Hardness and tensile strength testing, as well as corrosion testing, were conducted. It was found that Mg significantly impacts the hardness of the alloys, with a high Mg content increasing the hardness but reducing the tensile strength and ductility. The corrosion activity was reduced in the high-Mg-content alloy due to its larger particle size and reduced galvanic cell effect.
Article
Materials Science, Ceramics
You Lv, Yupeng Zhang, Xiangzhe Meng, Zehua Dong, Xinxin Zhang
Summary: In this study, a PEO/Mg-Mn LDH composite coating was prepared on the surface of a magnesium alloy, which exhibited excellent corrosion resistance and antibacterial properties.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Kyosuke Hirayama, Hiroyuki Toda, Dongsheng Fu, Ryohei Masunaga, Hang Su, Kazuyuki Shimizu, Akihisa Takeuchi, Masayuki Uesugi
Summary: The research showed that Al-10Mg alloys are highly susceptible to stress corrosion cracking after hydrogen charging, with observation of hydrogen bubble formation at the crack tip and both intergranular and transgranular fractures. Additionally, the main corrosion product in the aquatic environment was identified as Al(OH)3, and accurate measurement of corrosion products, hydrogen gas in bubbles, and solution pH during in-situ tensile testing enabled estimation of local hydrogen content elevation in the crack tip vicinity.
Article
Materials Science, Multidisciplinary
Lei Jiang, Zhihao Zhang, Huadong Fu, Shiyu Huang, Dawei Zhuang, Jianxin Xie
Summary: In this study, the corrosion behavior of Al-Zn-Mg-Cu alloys with different components in NaCl solution was experimental studied. The composition changes of micron and nano secondary phases during corrosion were semi-quantitatively characterized. The effect of the type and quantity of the secondary phases on the corrosion resistance and mechanism was discussed. The results showed that AA7050 and AA7136 alloys exhibited localized self-corrosion, while the E2 alloy designed by authors had significantly better pitting resistance due to the absence of secondary phases.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Junho Kim, Suhee Shin, Seunghyo Lee
Summary: This study aims to optimize the composition of recycled hypoeutectic Al-Si-Mg alloy to reduce CO2 emissions. The results show that increasing the Mg/Si ratio improves sacrificial protection, while increasing the Mg+Si content leads to a more refined and homogeneous distribution of Mg2Si, thus enhancing the corrosion resistance of the alloy.
MATERIALS CHARACTERIZATION
(2022)
Article
Electrochemistry
B. Zaghloul, J. R. Kish
Summary: The presence of dissolved Li2CO3 in 100 mM NaCl solution significantly inhibits corrosion of Mg alloy ZEK100, mainly by incorporating Li into the surface film to suppress filament-like corrosion and prevent chloride ions from enriching at the film/metal interface.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Metallurgy & Metallurgical Engineering
Jinshu Xie, Lele Wang, Jinghuai Zhang, Liwei Lu, Zhi Zhang, Yuying He, Ruizhi Wu
Summary: The effects of fine-grain structure on the mechanical and anti-corrosion properties of magnesium alloys were studied, achieving high strength, good elongation, and low corrosion rate. The weak anodic nature of the nano-lamellar structure was identified for the first time, showing excellent corrosion resistance. Designing magnesium alloys with high mechanical and anti-corrosion properties was proposed through the construction of a homogeneous potential strengthening microstructure.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Materials Science, Multidisciplinary
Zhichao Shang, Xiaoping Cai, Farshid Pahlevani, Yan Zheng, Akbar Hojjati-Najafabadi, Xinran Gao, Baojing Zhang, Peizhong Feng
Summary: High porosity Co-Al-Fe intermetallics with 3D-microstructures were successfully synthesized in one step via a thermal explosion reaction. The link between pore structure and permeability was investigated using 3D-XRM technology. The corrosion resistance of the samples with different Fe contents was studied at 900 degrees C under an oxygen/sulphur atmosphere for up to 120 h. The results showed that the samples maintained stable pore structure and intact internal matrices, attributed to the formation of a thin protective layer on the surface. In addition, inward diffusion of S resulted in the formation of FeS nodules.
Article
Materials Science, Multidisciplinary
Lian Ma, Hain Yang, Daquan Zhang, Wei Wu
Summary: In this study, an environmentally friendly volatile corrosion inhibitor, lysine salts (LA), was prepared between graphene oxide (GO) layers using an in situ intercalation technique. The corrosion inhibition effect of LA was evaluated, and it was found that LA-GO2 achieved a 99.3% corrosion inhibition efficiency after composition optimization. The inhibition of the electrochemical anodic process on the surface of mild steel was the main reason for the high corrosion inhibition efficiency of LA-GO2. The properties of the surface film on the corroded steel were also characterized in detail to understand the corrosion inhibition mechanism of LA-GO2.
Article
Materials Science, Multidisciplinary
Running Wang, Jiaping Zhang, Bing Liu, Jie Fei, Qiangang Fu
Summary: By introducing a tailored SiC-C interphase, the carbon fiber can be effectively protected, improving the mechanical and ablation properties of leading edge shaped C/C-ZrC-SiC composites.
Article
Materials Science, Multidisciplinary
Zihua Wang, Chijia Wang, Ruitao Wang, Jiapeng Deng, Kun Zhang, Yanji Zhu, Huaiyuan Wang
Summary: A robust anti-corrosive coating has been developed using functional fly ash, which demonstrates excellent corrosion resistance and improved mechanical properties. The coating achieves these enhancements through molecular cross-linking design and surface augmentation techniques, resulting in a significantly improved impedance modulus compared to pure polyurea coatings.
Article
Materials Science, Multidisciplinary
Haofei Sun, Meifeng Li, Hao Zhang, Jing Liu
Summary: The oxidation behavior of FeCrNi medium entropy alloy was investigated through experimental observations and density functional theory (DFT) calculations. The study found that at 900 degrees C, the alloy forms a desirable and continuous oxide layer, while at 1000 degrees C, the oxide layer becomes discontinuous with penetration of oxide. These observations highlight the significant role of phase structure in promoting the formation of protective oxide scales and influencing oxidation resistance.
Article
Materials Science, Multidisciplinary
Yang Li, Ke Ma, Jingjun Xu, Jingjing Li, Yueming Li, Yi Zhang, Jun Zuo, Meishuan Li
Summary: Cr2AlC diffusion barrier effectively blocks the diffusion of Ti, enhancing the stability and spalling resistance of the Al2O3 scales between NiCrAlY coating and TiAl alloy.
Article
Materials Science, Multidisciplinary
Weiyi Wang, Qinglin Pan, Xiangdong Wang, Bing Liu
Summary: By adding Ce, Sc, Y and Zr elements to Al-Mg-Si alloy, the microstructure of the alloy can be regulated, and the corrosion and heat resistance of the materials can be improved.
Article
Materials Science, Multidisciplinary
Andrea Cristoforetti, Javier Izquierdo, Ricardo M. Souto, Flavio Deflorian, Michele Fedel, Stefano Rossi
Summary: This study presents a new approach to studying the mechanism of filiform corrosion in organic coated steel using the scanning vibrating electrode technique (SVET) and micropotentiometry (potentiometric SECM). The electrochemical activity under the coating was evaluated by mapping the ionic current densities coming from artificial defects made in specific locations of the filament. Antimony tips were also used to investigate the pH changes associated with different corrosion reactions at the metal-paint interface. Local pH levels along the filament in the anodic and cathodic regions were determined.
Article
Materials Science, Multidisciplinary
Yang Gao, Dayun Sun, Zhu Liu, Shuo Cong, Rui Tang, Yanping Huang, Lefu Zhang, Xianglong Guo
Summary: The corrosion characteristics of a novel alumina-forming austenitic steel in high-pressure high-temperature water environment were studied. The addition of aluminum has a negative effect on the continuity of the alumina scale.
Article
Materials Science, Multidisciplinary
Negin Madelat, Benny Wouters, Peter Visser, Zahra Jiryaeisharahi, Kristof Marcoen, Shoshan T. Abrahami, Annick Hubin, Herman Terryn, Tom Hauffman
Summary: This work explores the correlation between electrolyte transport properties and the variation of pigment volume concentration (PVC) in organic coatings. An odd random phase electrochemical impedance spectroscopy (ORP-EIS) approach is used to analyze the diffusion of ions independent from water uptake. The results show that a higher PVC leads to a more homogeneous coating structure, resulting in faster diffusion of ions and enhanced water uptake.
Article
Materials Science, Multidisciplinary
Eloa Lopes Maia, Serguei Gavrilov, Valentyn Tsisar, Kitty Baert, Iris De Graeve
Summary: The effect of pre-oxidation in air at 300-500°C on the initiation and development of liquid metal corrosion attack on 316L austenitic steel in static lead-bismuth eutectic (LBE) has been investigated. It was found that pre-formed oxide films can protect the surface against dissolution, while high temperature pre-oxidation leads to localized corrosion.
Article
Materials Science, Multidisciplinary
Baozhuang Sun, Qiuyu Wang, Yue Pan, Zhiyong Liu, Cuiwei Du, Xiaogang Li
Summary: In this study, a non-steady electrochemical model was established to investigate stress corrosion cracking (SCC). The model was verified using 304 SS with various microstructures, confirming its effectiveness in assessing SCC susceptibility.
Article
Materials Science, Multidisciplinary
Xingyu Xiao, Xinhua Liu, Zhilei Wang, Xuexu Xu, Mingying Chen, Jianxin Xie
Summary: The corrosion behavior and mechanisms of Cu-10Ni-X (Al, Fe, Mn, Cr, Sn, Ti, Zn) alloys in a 3.5% NaCl solution were systematically investigated. Both computational and experimental results revealed that except Ti, other elements could enhance the corrosion resistance of Cu2O passivation film.
Article
Materials Science, Multidisciplinary
Gen Zhang, Yan-Ping Huang, E. Jiang, Wei -Wei Liu, Hong Yang, Jing Xiong, Yong-Fu Zhao
Summary: The addition of aluminum has a significant influence on the intermetallic compounds in AFA alloys, particularly increasing the content of B2-NiAl phase. In the SCO2 environment, the oxide scales formed on AFA alloys with aluminum were thinner than on ASS without aluminum, and the structure of the oxide scales changed to a double-layer structure.
Article
Materials Science, Multidisciplinary
Yuxuan He, Guozheng Xiao, Chao Wang, Xuefeng Lu, Liuyuan Li, Shiying Liu, Yusheng Wu, Zhanjie Wang
Summary: The relationship between configurational entropy and lattice distortion in novel rare earth monosilicates was investigated, and the effect of configurational entropy on their properties was studied. The results showed that lattice distortion increased with the increase of configurational entropy, but a highly symmetrical crystal structure was formed when the configurational entropy was large enough, inhibiting the lattice distortion.