Article
Materials Science, Multidisciplinary
Yunlong Wu, Jing Nong, Sui Yuan, Qi Guo, Jian Xu
Summary: This study investigated the acoustic emission behavior of a single pit evolution on two types of stainless steels using small-scaled electrodes, finding that there were dozens of AE signals observed during pitting on 17-4 PH, but much less acoustically emissive on 304 SS. In-situ optical observation revealed black flocculent clusters in 17-4 PH during pitting, while this process was weak in 304 SS. It was concluded that the formation of hydrogen bubble inside the pit and the perturbation of electrolyte around the pit created AE signals.
Article
Materials Science, Multidisciplinary
Yingyue Yin, Huixiang Li, Shuaihang Pan, Jianhua Zhang, Quanquan Han, Shengzhao Yang
Summary: Understanding the passivation behavior of Hastelloy X superalloy fabricated by selective laser melting (SLM) is crucial for its anti-corrosion applications. Comparisons between the SLM-fabricated HX alloy surface and its commercial wrought counterpart revealed that the former exhibited a thicker and more compact passivation film due to its finer grains and higher density of low-angle grain boundaries (LAGBs). These characteristics resulted in a higher growth rate of the passivation film and reduced oxygen vacancy mobility during the nucleation process, thereby improving the corrosion resistance compared to the wrought counterparts.
Article
Construction & Building Technology
Samanbar Permeh, Kingsley Lau, Mayren Echeverria Boan, Matthew Duncan
Summary: Recent research has found that coatings with anti-microbial, anti-fouling, and barrier characteristics can help mitigate corrosion and marine fouling on steel elements in natural waters. However, it was observed that these coatings may not completely prevent fouling, as the coating degradation and biofilm formation could still occur. This was indicated by impedance dispersion associated with surface heterogeneities in the electrochemical impedance spectroscopy (EIS) analysis.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Shuichiro Amatsuka, Masashi Nishimoto, Izumi Muto, Makoto Kawamori, Yuya Takara, Yu Sugawara
Summary: Aging treatment of UNS S32750 super duplex stainless steel at 1173 K for 1.0 ks resulted in the formation of sigma and secondary austenite phases at the boundaries of alpha and gamma phases. The steel contained a small amount of Mn-Cr oxide and MnS complex inclusions. Pitting corrosion was not observed during potentiodynamic polarization of a small area without inclusions at 348 K. However, when the electrode area was reduced, pitting corrosion occurred at the Mn-Cr oxide and MnS complex inclusions near the sigma phase.
NPJ MATERIALS DEGRADATION
(2023)
Article
Chemistry, Physical
Senka Gudic, Ladislav Vrsalovic, Dario Kvrgic, Ales Nagode
Summary: The electrochemical behavior of CP Ti and Ti-6Al-4V alloy in simulated physiological solution was studied using various methods. Both materials form a two-layer oxide film on their surface, with the inner layer acting as a barrier against corrosion. CP Ti shows greater corrosion stability compared to Ti-6Al-4V alloy.
Article
Engineering, Manufacturing
Jiajun Lu, Shunda Zhan, Bowen Liu, Yonghua Zhao
Summary: This research presents a jet-electrolytic plasma micromachining (Jet-EPM) method to overcome challenges faced by electrochemical jet machining (EJM) in microstructuring chemically inert and passivating materials. The application of Jet-EPM in fabricating microstructures in the semiconductor material 4H-SiC is demonstrated, and the machining principle and characteristics of Jet-EPM are comprehensively investigated. This study considerably expands the range of materials that can be processed using the electrochemical jet technique.
INTERNATIONAL JOURNAL OF EXTREME MANUFACTURING
(2022)
Article
Materials Science, Multidisciplinary
Xin Chen, Maxim Gussev, Magdalena Balonis, Mathieu Bauchy, Gaurav Sant
Summary: Localized plastic deformation has been found to make nuclear reactor components more susceptible to stress corrosion cracking (SCC). By analyzing the surface reactivity and corrosion behavior of deformed stainless steel specimens, research has shown that regions with higher dislocation concentrations exhibit increased reactivity due to a reduction in corrosion activation energy. The combination of surface reactivity and strain distributions suggests that SCC cracking is likely to occur in areas with localized strain where micro-galvanic corrosion is favored.
MATERIALS & DESIGN
(2021)
Review
Materials Science, Multidisciplinary
Chuang Sun, Lei Xu, Xilin Lai, Zhengping Li, Ming He
Summary: This Review Article summarizes recent impressive advances in passivating defects in organic-inorganic halide perovskite (OIHP) solar cells and discusses the future prospects of developing high-efficiency and long-stability OIHP solar cells in terms of defect management.
ENERGY & ENVIRONMENTAL MATERIALS
(2021)
Article
Automation & Control Systems
Liqun Du, Mingxin Yu, Ke Zhai, Kunming Zheng, Haohao Cheng, Shuxuan Wang, Junshan Liu
Summary: This study proposed the particle assisted through-mask electrochemical etching (PA-TMEE) method to improve the localization and uniformity of microstructures. A coupled multi-physical field model was established to predict the profiles of micro pits. Experimental results showed that PA-TMEE resulted in better localization and uniformity compared to TMEE. The analysis also indicated that the particle diameter and content had an influence on the etching depth and uniformity of micro pits.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Liang Zhao, Yan Zhang, Haowen Bian, Guoqian Wang, Lei Ji
Summary: The electrochemical dissolution behavior of Ni(gamma)/Ni3Al(gamma') and Co(gamma)/Co3Al(gamma') in NaNO3 electrolyte solution was investigated. The experimental results showed that Al, W, and Ni ions in the gamma' phase destroy the dense oxide film formed by Cr ions in the gamma phase, leading to selective corrosion on the surface. The corrosion resistance of Co(gamma)/Co3Al(gamma') was worsened due to bromination by Br? ions.
Article
Nanoscience & Nanotechnology
Yudai Yamashita, Kaori Takayanagi, Kazuhiro Gotoh, Kaoru Toko, Noritaka Usami, Takashi Suemasu
Summary: The study found that Zn1-xGexOy films can serve as excellent interlayers for BaSi2, providing high photoresponsivity and effective surface passivation, thereby reducing carrier recombination rate.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Energy & Fuels
S. Libraro, M. Lehmann, J. J. Diaz Leon, C. Allebe, A. Descoeudres, A. Ingenito, C. Ballif, A. Hessler-Wyser, F-J Haug
Summary: Replacing silver metallization with earth-abundant materials is an important step for sustainable growth of photovoltaics. In this study, fire-through processes using aluminum as the metallization material for solar cells were investigated. It was found that increasing the nitrogen content of the silicon nitride can reduce aluminum penetration depth. The mechanisms behind metal-induced passivation degradation were also investigated and possible mitigation strategies were identified using an adapted SiOx/SiCx stack for tunnel oxide passivating contacts.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Chemistry, Physical
Zheng Yin, Renhua He, Yang Chen, Zhou Yin, Kun Yan, Kun Wang, Hong Yan, Honggun Song, Chengxin Yin, Hongyu Guan, Chao Luo, Zhi Hu, Chassagne Luc
Summary: Surface micro-galvanic corrosion and corrosive film were evaluated for their effects on the corrosion resistance of AZ91-xNd alloys using SEM, SKPFM, and electrochemical measurements. The addition of Nd suppressed micro-galvanic corrosion and formed a corrosive film containing Nd2O3, enhancing the corrosion resistance of the alloy.
APPLIED SURFACE SCIENCE
(2021)
Article
Construction & Building Technology
Paula Melo, Matias Echague, Carolina Guerra, Qingxu Jin, Mamie Sancy, Alvaro Paul
Summary: In this study, the effect of sulfate ions on chloride-induced corrosion of reinforced concrete was investigated. It was found that sulfate ions influenced the electrochemical behavior of steel corrosion at both low and high chloride concentrations, affecting the corrosion protective layer. The presence of higher chloride and sulfate content led to increased precipitation of calcium carbonate crystals on the carbon steel surface, which was associated with higher rates of localized corrosion.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Picha Panmongkol, Catleya Rojviriya, Isaratat Phung-on
Summary: This study investigated the formation of imitative micro pits on 304 stainless steel under electrochemical control in a 3.0% NaCl solution. The results showed that the shape of the micro pits changed from conical to cap-shaped during growth, indicating a non-uniform evolution. The piecewise polynomial method was used to analyze the real-time evolution of the micro pits and accurately distinguish different stages of pitting corrosion. 3D images obtained from SRXTM were consistent with cross-sectional images of real micro pits, confirming the usefulness of this technique in micro pit studies.
MATERIALS RESEARCH EXPRESS
(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.
