Article
Construction & Building Technology
Purnima, Shweta Goyal, Vijay Luxami
Summary: The corrosion inhibition mechanism of Serine (Ser) and Cysteine (Cys) for steel in alkaline concrete pore solution simulating carbonated environment was investigated using electrochemical techniques. Both inhibitors exhibited high inhibition efficiencies (>90%). UV-vis analysis confirmed the formation of inhibitor-Fe(III) complexes, indicating clear interaction between steel and corrosion inhibitors. Analyzing the steel surface after immersion in corrosive solutions, optical microscopy, SEM-EDS, FTIR, and XPS revealed the formation of a compact, barrier layer comprising metal-inhibitor complex. Gravimetric analysis showed that both amino acids adsorbed on the steel surface following the Langmuir isotherm. An inhibition mechanism for Ser and Cys in carbonated concrete environment was proposed, where Ser bound with Fe ions through the carboxylate functional group only, while Cys formed chelate with Fe ions through thiolate as well as carboxylate functional groups, leading to a more stable protective layer.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Heon-Young Ha, Kyeong-Won Kim, Seong-Jun Park, Tae-Ho Lee, Hyungkwon Park, Joonoh Moon, Hyun-Uk Hong, Chang-Hoon Lee
Summary: The effects of Cr on the microstructure, pitting corrosion resistance, and passive film properties of lightweight steel were investigated. The optimal Cr content for a homogeneous microstructure was found to be 5 wt%, which resulted in a (Cr,Al)-enriched passive film and improved resistance to pitting corrosion.
Article
Materials Science, Multidisciplinary
Sang-Jin Ko, Yun-Ho Lee, Ki-Seok Nam, Eun-Ha Park, Jung-Gu Kim
Summary: The effects of different surface conditions, namely carbonaceous residue, copper chloride, and deposit, were quantitatively evaluated for their impact on localized corrosion. Electrochemical analysis and corrosion simulation showed that all three surface conditions induced localized corrosion on copper, with the pitting factor increasing in the order of deposits, copper chloride, and carbonaceous residue. Corrosion simulation further revealed that the galvanic corrosion current density increased as the surface coverage and density of chloride residue decreased.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Heon-Young Ha, Jae Hoon Jang, Tae-Ho Lee, Sung-Dae Kim, Chang-Hoon Lee, Joonoh Moon
Summary: The microstructures of Fe-Cr-Ni-Mn-C alloys were refined through hot rolling processes, leading to the formation of a stable passive film and acceleration of passivation. This refinement increased the resistance to corrosion and reduced metastable pit events and passive current density.
Article
Construction & Building Technology
Ashish Kumar Purnima, Ashish Kumar Tiwari, Shweta Goyal, Vijay Luxami
Summary: The corrosion inhibition mechanism of amide-based amino acids, Asparagine (Asn) and Glutamine (Gln), for steel in concrete pore solution simulating carbonated environment was investigated. The results showed that both Asn and Gln can efficiently inhibit steel corrosion in carbonated environments, with Gln demonstrating higher protection ability than Asn. Gln formed a more stable and adherent protective film on the steel surface compared to Asn.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Jia-Lun Gu, Si-Yuan Lu, Yang Shao, Ke-Fu Yao
Summary: In this study, passive films were successfully separated from Ti-Zr-Be-Al/Ni/Fe glassy substrates as large-area thin membranes using the Ribbon Penetration method. The passive films were identified as a single-layer amorphous structure, predominantly composed of TiO2, ZrO2, and BeO. The addition of Ni or Fe element in the alloy promoted the enrichment of TiO2 in the passive films and improved their structural compactness, leading to superior corrosion resistance in 3.5 wt.% NaCl solution.
Article
Chemistry, Physical
Pascual Saura, Emilio Zornoza, Carmen Andrade, Veronica Ferrandiz-Mas, Pedro Garces
Summary: This study focuses on the composition of oxides in solutions simulating localized corrosion pits caused by chloride on reinforcing steel. It confirms higher acidity levels in solutions with higher Fe2+ concentrations. The results obtained from Raman and XPS techniques are coherent, showing the composition of oxides in both passive and corroding states.
Article
Engineering, Marine
Shaofei Zhou, Xu Liang, Jiandong Gao, Bo Ye, Chengyu Li, Jin Qian, Jiangtao Shu, Ying Ye
Summary: This study proposes the use of polyaniline-alkaline copper carbonate composites as additives in concrete to prevent corrosion and biofouling. High-dispersion preparation methods for this composite additive were established. The effects of the composite in concrete were investigated through various tests, showing good anti-biofouling properties and no negative effects on the mechanical properties of the concrete specimens when the additive content was below 0.20% of the concrete mass. The recommended content for the best application effect is 0.05-0.15% of the concrete mass.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Construction & Building Technology
Ashish Tiwari, Shweta Goyal, Vijay Luxami, Moloy K. Chakraborty, Prabhakar Gundlapalli
Summary: The study investigated the performance of two generic compounds at varying concentrations in carbonated pore solution, showing that both compounds reduced the corrosion rate and formed protective layers on the steel rebar surface. The migration ability of the compounds in concrete was also examined, demonstrating their potential to act as migratory inhibitors to retard rebar corrosion in dual corrosive environments.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Zijian Song, Yingjie Zhang, Lang Liu, Qi Pu, Linhua Jiang, Hongqiang Chu, Yuye Luo, Qingyang Liu, Huanchun Cai
Summary: In this study, the degradation of the passive film on carbon steel under tensile stress was investigated using X-ray photoelectron spectroscopy (XPS). The shedding ratio was proposed as a novel concept to quantify the degradation level of the passive film, and a computational model was derived based on XPS reanalysis. Electrochemical tests confirmed that the shedding ratio increases with applied tensile stress and has an inversely proportional relationship with polarization resistance. Additionally, partial recovery of the passive film degradation was observed after the stress was removed. Overall, the shedding-ratio model based on XPS reanalysis proves to be effective in quantitatively characterizing the degradation level of passive film and warrants further exploration.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Leila Galai, Loic Marchetti, Frederic Miserque, Pierre Frugier, Nicole Godon, Emmanuelle Brackx, Celine Remazeilles, Philippe Refait
Summary: The corrosion of iron in deaerated and slightly alkaline buffered solutions was studied for different Si concentrations ([Si] ranging from approximately 0 to approximately 110 mg L-1) over a period of approximately 30 days. It was found that iron corrosion resulted in the formation of a layer consisting of a mixture of Fe oxides and Fe silicates on the metal surface, as well as the precipitation of the same compounds in the solution and the release of Fe cations. Increasing the Si concentration promoted the formation of Fe silicates at the expense of Fe oxides, without increasing the total amount of corroded iron.
Article
Chemistry, Physical
J. Matthias Kahk, Johannes Lischner
Summary: This study examines the formal relationship between two modeling strategies for computing core electron binding energies in solids: the Delta-Self-Consistent-Field method based on density functional theory (DFT) and the GW method. The authors establish a link between these approaches by showing the equivalence, in DFT, between the total energy difference result for the first ionization energy and the eigenvalue of the highest occupied state in an infinite supercell. They introduce a new formalism that highlights how the accuracy of core electron binding energy calculations in DFT depends on the accuracy of the eigenvalue at the valence band maximum in insulators or at the Fermi level in metals. The authors find that incorporating a quasiparticle correction from GW theory, including vertex corrections, improves the accuracy of calculated core electron binding energies.
JOURNAL OF CHEMICAL THEORY AND COMPUTATION
(2023)
Article
Chemistry, Multidisciplinary
Jaehwan Kim, Ki-Tae Park, Tae Ho Kwon
Summary: To cope with the premature deterioration of reinforced concrete structures caused by chloride-induced corrosion, estimating the corrosion rate and calculating transport parameters is necessary. However, interpreting the impedance response of steel embedded in concrete is still challenging. Concrete acts as a good barrier but can contain unexpected or invisible variables that hinder electrical measurements. Overcoming these limitations requires confirming impedance responses under controlled variable cases.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Physical
Zhijian Zhang, Tiechui Yuan, Ruidi Li
Summary: The corrosion behavior of the SLM MEA and cast MEA was compared, revealing that the SLM MEA has inferior corrosion resistance due to metallurgical defects and smaller grain size. Specifically, the XY-plane of the SLM MEA showed poorer corrosion resistance than the XZ-plane, attributed to metallurgical defects, lack of fusion pores, and higher grain boundary density.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Construction & Building Technology
Lijie Chen, Ray Kai Leung Su
Summary: This study investigates corrosion rate measurement of microcell and macrocell corrosion (MMC) in reinforced concrete using the polarization resistance method. A modified Stern-Geary equation for MMC is proposed to account for the effects of macrocell current, and it is validated for both active and passive steel rebars. It is found that there is a significant overestimation for passive steel rebars, while a substantial measurement error exists for active steel rebars due to the macrocell current.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Zhufeng He, Yanxin Guo, Lifang Sun, Xianjun Guan, Shuang Jiang, Yongfeng Shen, Wen Yin, Xiaoli Zhao, Zhiming Li, Nan Jia
Summary: This study presents a universal strategy for designing ultrastrong and ductile face-centered cubic (fcc) multicomponent alloys by introducing interstitial-driven local chemical order (LCO) through simple thermomechanical processing. Fine laths containing interstitial-driven LCO domains have been observed in a prototype FeMnCoCrN alloy, resulting in an ultra-high yield strength of 1.34 GPa and a uniform elongation of 13.9%. This design strategy has also been successfully applied to a multicomponent austenitic steel, suggesting its potential in developing high-performance fcc materials at low cost.
Article
Materials Science, Multidisciplinary
Penghua Ge, Kefu Gan, Dingshun Yan, Pengfei Wu, Weisong Wu, Zhiming Li
Summary: This study reports an anomalous low-temperature annealing-induced hardening behavior in a prototype equiatomic FeCoNi medium-entropy alloy subjected to severe cold-rolling deformation. The hardening phenomenon is confirmed by microhardness measurements and tensile tests, and is correlated with the annealing-modified nanosubgrained structure. The reduction of distribution heterogeneities of shear bands and nanosubgrains upon annealing contributes to the relief of strain localization during plastic yielding. The rearrangement of nanosubgrains upon annealing also relieves the severe heterogeneity of nanohardness distribution, resulting in higher macroscopic strength and hardness. This novel annealing-induced hardening phenomenon provides a guideline for optimizing the thermomechanical treatment strategies of FeCoNi medium-entropy alloys to enhance their mechanical properties.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Yong Zhang, Pengfei Wu, Wenquan Ming, Xun Cao, Yizhong Huang, Zhiming Li
Summary: It is reported that the presence of Sm2O3 microparticles in Sm2Co17-type magnets may deteriorate their magnetic properties but improve mechanical and electrical performance. In this study, the distribution, structure, and elastic properties of Sm2O3 in a high-end Sm2Co17-type magnet were investigated. The results showed that the Sm2O3 microparticles with a size of 4.8 ± 2.1 μm were randomly dispersed in the magnet and acted as preferential sites for segregation of Zr-rich inclusions. The indexed structure of Sm2O3 was found to be metastable trigonal A-type, and its nano-twinned structure exhibited ductility, which could effectively reduce the brittleness of the magnet. This work provides insights into balancing the magnetic and mechanical properties of Sm2Co17-type magnets.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Zhimin Pan, Hong Luo, Qiancheng Zhao, Hongxu Cheng, Xuefei Wang, Yicong Ma, Xiaogang Li
Summary: The effect of adding Mo on the corrosion behavior of (CoNiV)100_xMox medium entropy alloys (MEAs) in 0.5 M H2SO4 solution was investigated. Results showed that despite the precipitation of the second phase, the introduction of Mo through micro alloying can significantly improve the corrosion resistance of CoNiV MEA. Furthermore, the competition effect between microgalvanic coupling and micro alloying in dominating the corrosion resistance of (CoNiV)100_xMox MEAs was discussed in detail.
Article
Engineering, Mechanical
Qinying Wang, Yuhui Song, Xingshou Zhang, Lijin Dong, Yuchen Xi, Dezhi Zeng, Qilin Liu, Huali Zhang, Zhi Zhang, Rui Yan, Hong Luo
Summary: Oil and gas pipelines face significant corrosion threats in harsh environments, making corrosion prediction crucial for their safe operation. Traditional empirical and mechanism-driven models have limitations due to their complex applicability conditions and calculations. Data-driven models based on machine learning are gaining popularity due to their efficiency and accuracy.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Chemistry, Physical
Jiawei Ma, Hong Luo, Xiaojun Hu, Zhiming Pan, Xiaogang Li
Summary: The effect of hydrogen on the passivation behavior and electrochemical characteristics of selective laser melted 316L stainless steel in a simulated anode environment for a proton exchange membrane water electrolyzer was investigated. The results showed that hydrogen charging increased the ratio of superficial Fe2+/Fe3+ and OH-/O2-, as well as the concentration of point defects, while reducing the film thickness and weakening its protective effect. The film exhibited n-type semiconductor behavior near 0.6 VSCE, and hydrogen charging led to a higher defect density and thinner space charge layer, promoting the invasion of aggressive ions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Yu Fu, Hong Luo, Zhimin Pan, Ya Wei, Bin Gan, Zhongnan Bi, Xiaogang Li
Summary: In this study, the hydrogen resistance evolution of a non-equiatomic Co35Ni36Cr23Mo6 MEA alloy was systematically investigated. The results showed that the alloy exhibited excellent hydrogen resistance with almost unchanged ultimate tensile strength and ductility after hydrogen pre-charging for 12 hours. Grain boundaries were found to be the main paths for hydrogen-induced secondary cracks. The presence of hydrogen not only had a negative effect on the MEA, but also promoted the formation of nanotwins during deformation process.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Zhimin Pan, Hong Luo, Ya Wei, Hongxu Cheng, Xuefei Wang, Qiancheng Zhao, Xiaogang Li
Summary: The segregation of solute elements and strengthening effects of CoCrNiCux medium-entropy alloys (MEAs) were investigated using both experiments and Metropolis Monte Carlo (MC) simulations. The addition of Cu was found to effectively improve the tensile strength and yield strength of the alloys due to solid solution strengthening and grain refinement caused by Cu-rich precipitates. The presence of micro-voids at the interface between Cu-lean and Cu-rich phases promoted crack initiation and propagation. The MC simulations showed local ordering in the annealed structures and revealed the atomic interactions and local chemical ordering of CoCrNiCu1.0 MEA.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Qiancheng Zhao, Hong Luo, Zhimin Pan, Xuefei Wang, Hongxu Cheng, Yuan Zong
Summary: The effect of ion nitriding on the properties of high carbon chromium bearing steel containing rare earth elements was investigated using micro-Vickers hardness, tensile test, and Charpy impact measurement. The original microstructure of the steel was analyzed using electron backscatter diffraction and x-ray diffraction. The results showed that ion nitriding increased the hardness and strength of the steel but decreased its impact toughness. The nitrided layer consisted of Fe3N and Fe4N and exhibited brittle cleavage fracture characteristics during fracturing process.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Multidisciplinary
Zhenghong Fu, Yong Zhang, Zhiming Li, Yiping Lu, Xiaoxiang Wu, Hui Wang
Summary: This study reports the development of a selectively laser melted eutectic high-entropy alloy with ultrahigh strength and good ductility through tuning micro-to nano-scale heterogeneous microstructures. The nano-sized B2 and L12 phases effectively hinder dislocation motion and improve strength, while the face-centered cubic matrix ensures uniform deformation and the Cr-rich clusters alleviate possible brittle failure of the hard B2 phase.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Hongxu Cheng, Hong Luo, Xuefei Wang, Zhimin Pan, Qiancheng Zhao, Chaofang Dong, Xiaogang Li
Summary: This study investigates the cathode plasma electrolytic deposition (CPED) for titanium and obtains TiN and TiN/CrN coatings. The TiN/CrN coating shows better diffusion resistance and lower polarization resistance compared to the TiN coating, thus having a promising application prospect.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Materials Science, Multidisciplinary
Qiancheng Zhao, Hongxu Cheng, Xuefei Wang, Hong Luo, Zhimin Pan, Xiaogang Li
Summary: In order to rapidly design and discover new medium entropy alloys (MEAs) with required mechanical properties, a data-driven machine learning (ML) strategy based on random forest regression (RFR) algorithm was proposed. Through correlation analysis and iterative screening, key additional features from material descriptors were identified. An Efficient Global Optimization (EGO) algorithm was used to search for optimal alloys and the alloy Al52Co24Cr18Ni4Mn2 was determined to have the highest predicted hardness value. Experimental validation revealed a higher hardness than the highest value in the original dataset. This approach can be extended to other multi-component regression problems.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Hongxu Cheng, Hong Luo, Zhimin Pan, Xuefei Wang, Qiancheng Zhao, Yu Fu, Xiaogang Li
Summary: This study investigated the hydrogen embrittlement behavior, micro-deformation, and crack propagation mechanism of LPBF CoCrFeNiMn HEA under different parameters. It was found that LPBF CoCrFeNiMn HEA exhibited excellent resistance to hydrogen embrittlement. Unsuitable LPBF parameters resulted in the formation of microcracks and holes, leading to a decrease in the hydrogen embrittlement resistance of the material. The effect of hydrogen on deformation mechanism and crack propagation was studied using EBSD, ECCI, and TEM techniques.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Hongxu Cheng, Hong Luo, Xuefei Wang, Xiaogang Li
Summary: The effects of heat treatment processes with different aging times on the corrosion behavior and passive film properties of the (FeCoNi)86Al7Ti7 high-entropy alloy were investigated. The study found that aging time significantly influenced the grain characteristics, L21 phase distribution, and corrosion resistance of the alloy. Samples aged for 1 hour exhibited the best corrosion resistance due to their composition homogeneity and high-quality passive film, in which Ti oxides played a major role.
Article
Materials Science, Multidisciplinary
Pengfei Wu, Yong Zhang, Liuliu Han, Kefu Gan, Dingshun Yan, Weisong Wu, Lunhua He, Zhenghong Fu, Zhiming Li
Summary: In this study, a newly developed non-equiatomic high-entropy alloy with an ultra-low stacking fault energy was investigated. It was found that the formation of martensite transformation was suppressed due to the presence of chemical short-range order and atomic size misfit, leading to enhanced plastic deformation ability and ductility in the alloy.
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.
