Article
Chemistry, Physical
Boshu Liu, Yuping Ren, Hongxiao Li, Min Jiang, Gaowu Qin
Summary: The research found that the interdiffusion coefficient in Mg solid solution increased with an increase of Y concentration, while the diffusion coefficient of Y impurity in Mg was relatively low. The interdiffusion coefficients and activation energies in intermetallic phases were relatively small, and exhibited different mechanisms as temperatures changed.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Xing Gao, Qiushuo Huang, Danyang Ma, Yumiao Jiang, Tiegang Ren, Xugeng Guo, Jinglai Zhang, Lei Guo
Summary: The study investigated the corrosion behavior of AZ91D magnesium alloys in different concentrations of NaCl solution and ASTM D1384-87 corrosive solution with the influence of pyrazolium ionic liquid [BDePz][NTf2]. The corrosion inhibition performance of the inhibitor was found to be good, with maximum efficiency of 90.4% in 0.05 wt% NaCl and 82.0% in ASTM D1384-87 corrosive solution. The surface of the magnesium alloy remained relatively smooth after soaking in the inhibitor solution, and the possible inhibition mechanism was proposed based on XPS, XRD, molecular dynamics simulations, and quantum chemical calculations.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Review
Metallurgy & Metallurgical Engineering
Feng Peng, Dongdong Zhang, Xuanyong Liu, Yu Zhang
Summary: Surface modification plays a critical role in improving the corrosion resistance of magnesium and its alloys, with superhydrophobic coatings inspired by nature serving as an effective protective method due to their water contact angle greater than 150 degrees. The review discusses the model and protection mechanism of superhydrophobic coatings, as well as methods for fabricating them on Mg alloys and functional coatings for enhanced performance. Challenges and future research directions in this field are also highlighted for potential advancements.
JOURNAL OF MAGNESIUM AND ALLOYS
(2021)
Article
Materials Science, Multidisciplinary
Danyang Ma, Jianfeng Zhao, Lin Zhang, Jianfeng Huang, Junxia Liu, Tiegang Ren
Summary: Mg alloys have a promising application prospect as a structural material, but their corrosion resistance is very poor. Therefore, developing environmentally friendly and pollution-free corrosion inhibitors to inhibit the corrosion of Mg alloys and studying their inhibition mechanism is important.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Jing Tian, Ge Yang, Zehua Lei, Jiehua Huang, Zhiwen Zhang, Jianhui Xie
Summary: The microstructure, biocorrosion resistance, and osteogenesis performances of as-cast Mg-Zn-Y-Mn alloys with different volume fraction of long period stacking ordered (LPSO) structure were investigated. 18R-LPSO phase can be formed in the alloys, and its volume fraction increases with the elevating Zn and Y content. The corrosion mechanism of the three alloys is dominated by the micro-galvanic effect between cathodic LPSO and anodic α-Mg, resulting in the accelerating corrosion rate with the increasing volume fraction of LPSO phase.
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
Materials Science, Multidisciplinary
Yong Cai, Hong Yan, Mingyu Zhu, Kai Zhang, Xuening Yi, Rongshi Chen
Summary: The study demonstrates that the high Gd content in alloys can enhance high-temperature oxidation resistance and corrosion resistance. The oxide film is composed of three layers with different compositions, showing improved performance with increasing Gd content.
Article
Chemistry, Physical
Jian Zhu, Xiang Cheng, Longmei Zhang, Xidong Hui, Yongling Wu, Hongyu Zheng, Zhiqiang Ren, Yang Zhao, Wenyu Wang, Sheng Zhu, Xiaoming Wang
Summary: A fully dense CoCrFeNi high entropy alloys (HEAs) coating with uniform microstructure was successfully prepared on AZ91 alloy by cold spray, exhibiting excellent corrosion resistance and surface protection for Mg alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Shixue Zhang, Yunlong Ding, Zhiguo Zhuang, Dongying Ju
Summary: This study successfully welded magnesium and aluminum using a vacuum diffusion welding process, and analyzed the microstructures and phase compositions of the diffusion layers. The results showed that the diffusion layers had different phase compositions and exhibited good corrosion resistance. Particularly, the corrosion resistance of the Mg2Al3 layer and the Mg17Al12 layer was comparable to pure aluminum.
Article
Materials Science, Multidisciplinary
J. Christudasjustus, V. B. Vukkum, R. K. Gupta
Summary: Surface films of AA2024-T3 after immersion in 0.1 M NaCl for different time periods were studied using scanning electron microscopy. The corrosion product formed on the surface consisted of porous outer and compact inner layers. The presence of Cu enrichment at the corrosion product/metal interface and Cu clusters within the surface films was observed. Exfoliation corrosion was also observed, leading to rapid corrosion at the sub-surface level. The mechanistic aspects of surface film formation, Cu cluster formation, and corrosion under the surface film were discussed.
Article
Materials Science, Multidisciplinary
Xinyu Yang, Xiaopeng Lu, Yuxin Zhou, Yufei Xie, Junjie Yang, Fuhui Wang
Summary: The addition of NaH2PO4 inhibits the formation of the porous and non-protective Mg(OH)2 corrosion product layer in 3.5 wt% NaCl solution, and instead forms a dense and protective chemical conversion coating on the active Mg surface. The conversion-like coating consists mainly of MgHPO4 and Mg3(PO4)2, resulting in significantly improved corrosion and tribocorrosion performance compared to the corrosion product layer formed in 3.5 wt% NaCl solution.
Article
Materials Science, Multidisciplinary
Wenjun Ci, Lili Deng, Xianhua Chen, Xu Dai, Li Feng, Chen Wen, Jingying Bai, Fusheng Pan
Summary: The effects of minor Gd addition on the microstructure, mechanical performance, and corrosion behavior of Mg-1Y alloys were studied. The addition of Gd decreased the hydrogen evolution rate of Mg-Y-Gd alloys, and transformed the active Mg24Y5 phase into the Mg5(GdY) phase. The high corrosion resistance of Mg-1Y0.6Gd alloy was attributed to the fine grain size, uniform distribution of surface potential, and the formation of protective corrosion passivation film rich in Gd2O3 and Y2O3.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Review
Materials Science, Multidisciplinary
Pavel Predko, Dragan Rajnovic, Maria Luisa Grilli, Bogdan O. Postolnyi, Vjaceslavs Zemcenkovs, Gints Rijkuris, Eleonora Pole, Marks Lisnanskis
Summary: Magnesium alloys are in high demand in various industries due to their high specific strength characteristics, but their applicability in aggressive environments is limited by their high chemical reactivity. Effective technologies for corrosion protection are urgently needed to ensure the use of magnesium-containing structures in various fields. Recent advancements in protective coatings using different deposition techniques have been made, enhancing the corrosion resistance of magnesium alloys.
Article
Chemistry, Multidisciplinary
Ying Wang, Xingyi Zhou, Minhao Yin, Jibin Pu, Ningyi Yuan, Jianning Ding
Summary: A superhydrophobic composite coating based on LDHs was constructed on Mg alloy through laser treatment, in situ growth of LDHs, and modification with OTS, showing excellent corrosion resistance and long-term stability. This was attributed to the superhydrophobicity, compactness, ion-exchange capacity of LDH layer, and dense Si-O-Si network within the OTS layer.
Article
Materials Science, Multidisciplinary
Wenjun Ci, Xianhua Chen, Yue Sun, Xu Dai, Guanzheng Zhu, Di Zhao, Fusheng Pan
Summary: The study investigates the impact of different Zn concentrations on the microstructure, corrosion property, and mechanical property of Mg-0.3Sc-xZn alloys. MSZ1 alloy exhibits the highest corrosion resistance and appropriate mechanical properties. The corrosion resistance of Mg-0.3Sc-1Zn alloys is attributed to the homogeneous volta-potential distribution and dense corrosion product film.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(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.