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
Yingrui Liu, Shuyu Li, Hao Li, Guanshui Ma, Lili Sun, Peng Guo, Peiling Ke, Kwang-Ryeol Lee, Aiying Wang
Summary: A cleaning intervention was introduced to control the growth defect of the coating, which effectively improved the corrosion resistance in the deep-sea environment.
Article
Materials Science, Multidisciplinary
Peilin Wang, Kaifa Du, Mengyi Tang, Huayi Yin, Dihua Wang
Summary: This study investigates the effect of Cl- on the stability of a nickel anode in molten salt system and finds that the nickel anode experiences severe corrosion when the Cl- concentration exceeds a critical value. Additionally, the study also discovers that the addition of CaCO3 can effectively protect the anode from Cl- induced corrosion.
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
Materials Science, Multidisciplinary
Pedro Atz Dick, Robert G. Kelly
Summary: The influence of non-aqueous solvents on the corrosion behavior of passive alloys is still largely unknown. The corrosion of alloy C-22 was studied in organic aprotic solvents containing various water concentrations of HCl. It was found that C-22 is passive in nearly anhydrous solvents, but passivity breaks down when 0.1M HCl is present, leading to either uniform corrosion or pitting. Residual water can either stimulate or inhibit active dissolution depending on its concentration.
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
Materials Science, Multidisciplinary
Xiaoqi Yue, Zhile Yang, Luyao Huang, Lei Zhang, Jun Li, Zhaozhan Xue, Jinshan Pan
Summary: The electrochemical behavior and passive film characteristics of an ultra-thin 316L foil in a NaCl solution were studied. The microstructure, applied potential, and solution pH were found to have significant effects on the performance of the 316L foil. Compared to traditional wrought 316L, the 316L foil exhibited higher breakdown potential and lower passive current density, with a passive film enriched in Cr and Mo oxides. The favorable microstructure and absence of MnS inclusions contribute to the formation of a continuous and compact passive film, providing effective corrosion resistance in NaCl solution and stability under acidic conditions or high polarized potential.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Masaru Kato, Masashi Nishimoto, Izumi Muto, Yu Sugawara
Summary: In oxide films on CoCrCuFeNi medium-entropy alloys, Cu exists as CuO at Cu contents of 0-5 at%, and the concentration increases with increasing Cu content. The addition of Cu suppresses active dissolution in HCl. The pitting potential in NaCl increases with 1 at% Cu addition, but decreases with 3 at% Cu or more. The role of Cu is clarified by studying the relationship between active dissolution rate and pitting potential. The effects of Mo and W are also discussed.
Article
Materials Science, Multidisciplinary
Guilherme dos Santos Vacchi, Rodrigo Silva, Cristie Luis Kugelmeier, Claudio Beserra Martins Junior, Isabela Dainezi, Jose Henrique Alano, Anibal de Andrade Mendes Filho, Wislei Riuper Ramos Osorio, Carlos Alberto Della Rovere
Summary: The study shows that multi-pass shielded metal arc welding can lead to the formation of non-metallic micrometric inclusions in the weld metal region, resulting in decreased corrosion resistance. Additionally, differences in hardness values were observed between the base metal and weld metal regions.
Article
Materials Science, Multidisciplinary
Zhen Zhang, Xiaofeng Li, Hong Yi, Huiqi Xie, Zhanyong Zhao, Peikang Bai
Summary: Addition of Nb alloy significantly influences the passive film and corrosion behavior of the CoCrFeMnNi high entropy alloy (HEA), leading to refined grain size, promotion of Laves phase precipitation, and changes in inclusion type. The improved corrosion resistance, demonstrated by increased pitting potential and polarization resistance, is attributed to the alteration of passive film properties due to Nb alloying. Discussion on the relationship between microstructure, passive film, and corrosion property helps illustrate the corrosion enhancement mechanism brought about by Nb alloying.
Article
Materials Science, Multidisciplinary
Hao Feng, Chuntian Yang, Enze Zhou, Dake Xu, Huabing Li, Zhouhua Jiang
Summary: A novel nitrogen-doped CrCoNi medium-entropy alloy (MEA) was manufactured through pressurized metallurgy technique, which displayed low corrosion rate and pitting corrosion sensitivity in the presence of corrosive microorganism. Nitrogen doping also improved the hardness and inhibited tribocorrosion of the alloy.
Article
Materials Science, Multidisciplinary
Shiyu Huang, Wei Wu, Yanjing Su, Lijie Qiao, Yu Yan
Summary: Zn is considered a promising degradable biomaterial, but concerns exist due to unclear degradation mechanism in physiological solutions. The corrosion product film displayed a laminated structure with complex layers, and localized corrosion initiated at grain boundaries affecting degradation rate.
Article
Electrochemistry
A. Ortiz-Ozuna, F. A. Godinez, J. Genesca, R. Montoya
Summary: To better understand the anodic polarization of Mg, a gel electrolyte doped with phenolphthalein was used to avoid convective effects and reveal alkaline zones. This article provides new insights on Mg dissolution when galvanically coupled to AA7075. It has shown that OH- ions generated during Mg dissolution are locally neutralized in the electrolyte and accurately identified the location of Mg(OH)2 compound formation during anodic dissolution.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Analytical
Xian-Zong Wang, Qian Hu, Longhua Zhang, Zhongyu Cui
Summary: The addition of Nb has a significant effect on the passivation behavior of CoCrNiNbx alloy. An appropriate amount of Nb can improve the corrosion resistance of the alloy by thickening the passive film and promoting the formation of Nb oxides and Cr2O3. This has important implications for the stability and pitting resistance of the alloy.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Electrochemistry
Julien Claquesin, Olivier Lemoine, Mathieu Gibilaro, Laurent Massot, Pierre Chamelot, Gilles Bourges
ELECTROCHIMICA ACTA
(2019)
Article
Materials Science, Ceramics
Damien Bolore, Mathieu Gibilaro, Laurent Massot, Pierre Chamelot, Emmanuel Cid, Olivier Masbernat, Franck Pigeonneau
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2020)
Article
Engineering, Industrial
I. Pasquet, V. Baco-Carles, P. Chamelot, M. Gibilaro, L. Massot, Ph. Tailhades
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2020)
Article
Chemistry, Physical
Catherine Bessada, Didier Zanghi, Mathieu Salanne, Ana Gil-Martin, Mathieu Gibilaro, Pierre Chamelot, Laurent Massot, Atsushi Nezu, Haruaki Matsuura
JOURNAL OF MOLECULAR LIQUIDS
(2020)
Article
Electrochemistry
S. Geran, P. Chamelot, J. Serp, M. Gibilaro, L. Massot
ELECTROCHIMICA ACTA
(2020)
Article
Electrochemistry
L. Massot, M. Gibilaro, D. Quaranta, P. Chamelot
Summary: This work provides a detailed electrochemical study of the molten LiF-NaF-CrF2 system on an Ag electrode in the temperature range of 750°C-900°C. The addition of Li2O was found to influence the electrochemical reduction pathway of dissolved CrF2 on the silver electrode.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Analytical
C. Remazeilles, M. Gibilaro, L. Massot, C. Chiron, A. M. Martinez, P. Chamelot
Summary: Neodymium oxide titration in the LiF-NdF3-Nd2O3 melt on platinum electrode was studied using square wave voltammetry, aiming to develop an in-situ and fast technique for monitoring oxide amount during Nd or Nd-Fe production by electrolysis. The methodology was validated through elemental analyses in the temperature range of 850-1050 degrees Celsius, and then successfully applied to determine the solubility of Nd2O3 in LiF-NdF3 system.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
L. Massot, M. Gibilaro, J. Nicaise, P. Chamelot
Summary: The electrochemical behavior of La(III)/La and Pr(III)/Pr systems in LiF-CaF2 media has been investigated, showing that La(III) and Pr(III) can be reduced to metals at specific potentials. The effects of oxide additions on the reactions were also observed, leading to the formation of alloys on different electrodes.
JOURNAL OF FLUORINE CHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
Mathieu Gibilaro, Pauline Meyer, Laurent Massot, Sylvie Bouvet, Veronique Laurent, Pierre Chamelot
Summary: A (NixFeyO4-Ni1-x'Fe-x'O)/(Cux'' Niy'') cermet candidate as inert anode was investigated in cryolite at 960 degrees C. Immersion tests and electrolysis experiments were conducted to evaluate its stability and corrosion resistance. The oxidation of metallic phase under industrial conditions led to the formation of porosity in the cermet material.
Article
Chemistry, Inorganic & Nuclear
L. Massot, H. Meskine, M. Gibilaro, P. Chamelot
Summary: The electrochemical behavior of Er and Yb in molten salt was studied, leading to successful co-deposition and co-extraction of the two elements. This research provides insights into lanthanide extraction without the use of reactive electrodeposition.
JOURNAL OF FLUORINE CHEMISTRY
(2022)
Article
Chemistry, Analytical
S. Abed, M. Gibilaro, P. Chamelot, A. David, C. Barus, L. Massot
Summary: The aim of this study is to demonstrate the positive impact of nucleation mode study on the control of metal electrodeposition and the formation of highly sensitive bimetallic electrodes. By optimizing the electrodeposition conditions, the largest active surface can be generated, thereby increasing electrode sensitivity. The nucleation phenomena and initial growth of copper on gold, platinum, and stainless steel 316L electrodes were investigated using cyclic voltammetry and chronoamperometry in aqueous media. The results confirmed the existence of progressive nucleation mode through comparison with theoretical models. The optimal operating conditions for the preparation of the largest active surface area were determined, and the ability of the formed bimetallic electrodes to detect low nitrate concentration in artificial seawater was tested using square wave voltammetry.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Electrochemistry
M. Gibilaro, C. Remazeilles, L. Massot, P. Chamelot
Summary: The influence of Nd2O3 in the LiF-NdF3-Nd2O3 melt on carbon anode oxidation was investigated to prevent CFX(g) formation during Nd metal production. An analysis of the electrochemically produced gas was conducted using a gas extractor device, which revealed that the carbon anode was only oxidized into CO2(g) until a critical current density was reached. For higher current densities, CF4(g) and C2F6(g) were also produced, which was attributed to the diffusion limited current density of NdOF5 (4-). The influence of Nd2O3 and temperature on this limiting current density was determined using steady-state voltammetry.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Electrochemistry
J. Pertuiset, M. Gibilaro, O. Lemoine, P. Chamelot, G. Bourges, L. Massot
Summary: This study investigates the electrochemical behavior of gold, palladium, and platinum as anode materials in molten chloride media and finds that platinum is the most suitable choice for oxygen evolution without damaging the material under controlled electrolysis conditions.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Liyuan Liu, Hannes Zschiesche, Markus Antonietti, Mathieu Gibilaro, Pierre Chamelot, Laurent Massot, Patrick Rozier, Pierre-Louis Taberna, Patrice Simon
Summary: MXenes, a rapidly growing family of 2D transition metal carbides, carbonitrides, and nitrides, are one of the most promising high-rate electrode materials for energy storage. A one-pot molten salt electrochemical etching (E) method is proposed to achieve Ti2C MXene directly from elemental substances (Ti, Al, and C), which greatly simplifies the preparation process.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Liyuan Liu, Hannes Zschiesche, Markus Antonietti, Barbara Daffos, Nadezda V. Tarakina, Mathieu Gibilaro, Pierre Chamelot, Laurent Massot, Benjamin Duployer, Pierre-Louis Taberna, Patrice Simon
Summary: The unique properties of 2D MXenes, such as metal-like electrical conductivity and versatile surface chemistry, make them attractive for various applications, including energy storage. In this study, O-free, Cl-terminated MXenes were synthesized via a molten salt etching route and then the surface termination was changed from Cl to N through post-thermal treatment. The modified MXenes showed unique electrochemical characteristics and achieved high-performance electrodes for energy storage.
ADVANCED ENERGY MATERIALS
(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.
