Article
Materials Science, Multidisciplinary
Chenhao Huang, Zhen Zhang, Jing Yan, Lan Sun, Jun Wang
Summary: This study investigates the impact of PTFE on the wear and corrosion resistance of Ni-P coatings in the oil and gas industry. The results show that incorporating PTFE enhances the coating's durability and effectively prevents the transmission of corrosive media and hydrogen. This research provides a comprehensive analysis and a robust corrosion model for the Ni-P-PTFE coating.
Article
Materials Science, Multidisciplinary
Jian Xu, Jing Nong, Fengrui Liang, Sui Yuan, Lu Ren, Qi Guo, Tetsuo Shoji
Summary: This study investigated the effects of hydrogen charging on the oxide film of Ni, Cr, and Alloy 690 in high-temperature water. The results showed that hydrogen charging caused amorphization in the inner layer of Cr, thinning of the oxide film in Ni, and the presence of cavities along the boundary of inner oxide and matrix. The oxide film of Alloy 690 exhibited a mixed feature of Ni and Cr. The diffusion of hydrogen into the solution not only affected the thermal stability of the oxide film but also hindered the precipitation of outer oxide.
Article
Chemistry, Physical
Wenjing Xie, Irfan Haider Abidi, Zhengtang Luo, Lu-Tao Weng, Chi-Ming Chan
Summary: This study investigated the interaction between graphene and Cu foil substrate using ToF-SIMS at high temperature, showing that a graphene-covered Cu surface exhibits improved oxidation resistance during annealing and storage processes.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Applied
Javier Amaya Suarez, Jose J. Plata, Antonio M. Marquez, Javier Fdez Sanz
Summary: This study utilizes density functional theory calculations to investigate the main reaction steps of CO oxidation at PtCu nanoparticles, revealing the significant role of the intermetallic surface structure in the high catalytic activity of these nanoparticles. By comparing with clean Pt (111) surface and different Cu-doped models, it is found that the presence of Cu induces segregation of CO and O-2 molecules at specific sites, leading to a unique CO-assisted mechanism for O-2 dissociation with a lower kinetic barrier compared to traditional Pt surfaces.
Article
Chemistry, Physical
Rebecca Y. Hodgetts, Hoang-Long Du, Tam D. Nguyen, Douglas MacFarlane, Alexandr N. Simonov
Summary: This study investigates the mechanism, kinetics, and suitable catalysts for the hydrogen oxidation reaction (HOR) in organic media relevant to the nitrogen reduction reaction (NRR). The results suggest that a high-performance catalyst for the H2 oxidation as an anode process for the Li-mediated NRR is likely to emerge through the design of multicomponent systems, facilitating the kinetics of both HOR pathways and suppressing poisoning of the catalytic surface.
Article
Chemistry, Applied
Pritpal S. Dhillon, Michael P. Harold, Di Wang, Ashok Kumar, Saurabh Y. Joshi
Summary: The state-of-the-art Ammonia Slip Catalyst (ASC) has a dual-layer washcoat architecture with a bottom layer of Pt/Al2O3 and a top layer of Cu/SSZ-13. A trade-off between the NH3 conversion and N-2 selectivity presents a challenge in the ASC design. The best results are obtained with the combination of a base mixed layer that provides for effective coupling between Pt and Cu active sites and a top Cu/SSZ-13 layer of an intermediate thickness and nominally half of the total Cu loading.
Article
Multidisciplinary Sciences
Gihoon Cha, Imgon Hwang, Seyedsina Hejazi, Ana S. Dobrota, Igor A. Pasti, Benedict Osuagwu, Hyesung Kim, Johannes Will, Tadahiro Yokosawa, Zdenek Badura, Stepan Kment, Shiva Mohajernia, Anca Mazare, Natalia Skorodumova, Erdmann Spiecker, Patrik Schmuki
Summary: The study evaluates the photocatalytic performance of single atom Pd, Pt, and Au on TiO2 nanosheets. The results show that single atom Pd exhibits better catalytic activity than Pt and Au, attributed to the charge localization nature of noble metal single atoms embedded in the TiO2 surface.
Review
Chemistry, Multidisciplinary
Yuanyuan Li, Anatoly Frenkel
Summary: This article discusses strategies to enhance reactivity of catalysts by increasing the number of active sites and improving intrinsic activity per active site, emphasizing the impact of unique structures and interactions of single-atom catalysts (SACs) with supports on their reactivity. The study is important for addressing the complexity of catalytically active species distribution heterogeneity in SACs.
ACCOUNTS OF CHEMICAL RESEARCH
(2021)
Article
Chemistry, Physical
Suphitsara Maturost, Suwaphid Themsirimongkon, Paralee Waenkaew, Napapha Promsawan, Jaroon Jakmunee, Surin Saipanya
Summary: The research on electrocatalytic oxidation of methanol, ethanol, and formic acid using a nanocomposite catalyst consisting of multi-wall carbon nanotubes, copper oxide, and platinum nanoparticles has shown promising results in improving low-temperature fuel cell applications. The addition of copper oxide significantly enhances the electroactivity towards oxidation reactions, making the 1Pt-3CuO/CNT electrocatalyst a capable candidate for fuel cell applications.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Multidisciplinary
Wenlang Huang, Taihong Huang, Peng Song, Rong Chen, Biju Zheng, Chengxi Wang, Chao Li, Jiansheng Lu
Summary: Water vapor accelerates Cr consumption and reduces the service life of NiCr coatings. The oxidation kinetic rate and volatilization rate of CrO2(OH)(2) were calculated to establish a relationship for predicting coating lifetime based on actual oxidation kinetic rate.
Article
Chemistry, Physical
Wanli Liang, Zhichen Le, Pengyu Dong, Zixuan Dan, Jiaxuan Chen, Hao Zhang, Jian Chen, Fangyan Xie, Nan Wang, Yanshuo Jin, Hui Meng
Summary: This study proposes a new PGM-free bifunctional hydrogen electrocatalyst, Janus Ni/W bimetallic materials. The synergistic effect of Ni and W in the bimetallic materials enhances the reaction kinetics of hydrogen evolution and hydroxide oxidation, resulting in the design of a high-efficiency and low-cost catalyst.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Xiaowen Yu, Egon Campos dos Santos, Jai White, German Salazar-Alvarez, Lars G. M. Pettersson, Ann Cornell, Mats Johnsson
Summary: A high-performance MoOx/Pt composite electrocatalyst for glycerol electrolysis in alkaline electrolytes is reported, showing excellent performance in both glycerol oxidation reaction (GOR) and hydrogen evolution reaction (HER). The MoOx nanosheets play an important role in the adsorption of glycerol molecules in GOR, the dissociation of water molecules in HER, and the strong electronic interaction with Pt.
Article
Chemistry, Physical
Guowei Weng, Song Lei, Rui Wang, Kun Ouyang, Jiale Dong, Xuanhe Lin, Jian Xue, Liang-Xin Ding, Haihui Wang
Summary: A high-efficiency ammonia synthesis technology has been developed using a CO2-tolerant La5.5WO11.25 d (LWO) membrane reactor, which improves the electrocatalytic nitrogen reduction reaction performance by coupling with hydrogen purification at intermediate temperatures. The produced protons from molecular hydrogen can be used for in situ ammonia synthesis through nitrogen hydrogenation. This promising electrochemical membrane reactor achieves superior ammonia synthesis performance with the highest Faradaic efficiency (FE) of 43.8% and corresponding ammonia rate of 231.1 mg h-1 cm -2 at 350°C. It provides a feasible direction to promote the development of the ammonia synthesis industry.
Article
Materials Science, Multidisciplinary
Chong Sun, Xianglin Yan, Jianbo Sun, Jianxin Pang, Weimin Zhao, Xueqiang Lin
Summary: The stress corrosion behavior of X65 steel in water-saturated supercritical CO2 streams with various impurities was studied. The localized corrosion, mainly depending on impurity type, was significantly accelerated by stress. Oxygen had little effect on the SCC susceptibility of X65 steel, while sulfur dioxide and nitrogen dioxide greatly increased it due to their strong corrosion effects.
Article
Materials Science, Multidisciplinary
Danielle Schweke, Genady Rafailov, Shimon Zalkind, Omri Azulai, Lior Rabinovitch, Shmuel Hayun
Summary: The oxidation process of cerium in air was studied using structural and compositional analyses. It was found that the oxide contains a high content of hydrogen, mainly in the form of hydroxyls and hydride ions. The presence of hydroxyls leads to the formation of a thin hydroxide layer and an increased oxidation rate. The observed anisotropy in oxidation rate is consistent with the efficiency of water splitting and the preferred paths for hydroxyl diffusion.
Article
Materials Science, Multidisciplinary
Jesper Ejenstam, Mattias Thuvander, Par Olsson, Fernando Rave, Peter Szakalos
JOURNAL OF NUCLEAR MATERIALS
(2015)
Article
Materials Science, Multidisciplinary
Jesper Ejenstam, Peter Szakalos
JOURNAL OF NUCLEAR MATERIALS
(2015)
Article
Materials Science, Multidisciplinary
Y. Alipour, P. Henderson, P. Szakalos
MATERIALS AT HIGH TEMPERATURES
(2015)
Article
Metallurgy & Metallurgical Engineering
Jesper Ejenstam, Bo Jonsson, Peter Szakalos
OXIDATION OF METALS
(2017)
Letter
Materials Science, Multidisciplinary
P. Szakalos, T. Akermark, C. Leygraf
Correction
Materials Science, Multidisciplinary
Y. Alipour, P. Henderson, P. Szakalos
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
(2014)
Article
Nuclear Science & Technology
J. Wallenius, S. Qvist, I Mickus, S. Bortot, P. Szakalos, J. Ejenstam
NUCLEAR ENGINEERING AND DESIGN
(2018)
Article
Metallurgy & Metallurgical Engineering
Peter Domstedt, Mats Lundberg, Peter Szakalos
OXIDATION OF METALS
(2019)
Article
Materials Science, Multidisciplinary
Peter Domstedt, Mats Lundberg, Peter Szakalos
JOURNAL OF NUCLEAR MATERIALS
(2020)
Article
Nuclear Science & Technology
Sheng Yang, Bin Xi, Youpeng Zhang, Disi Wang, Bo Liu, Peter Szakalos, Jesper Ejenstam, Janne Wallenius, Guangqing He, Wenyang Zhang
Summary: This paper investigates the feasibility of applying low power pulse laser welding technology to surface a protective layer against heavy liquid metal corrosion in fuel cladding tubes made of austenitic 316L stainless steel. Based on tests and investigations, it is preliminarily confirmed that low power pulse lasers with specific power input can weld Fe-10Cr-4Al-RE alloy onto the outer surface of a 316L stainless steel tube.
NUCLEAR MATERIALS AND ENERGY
(2021)
Article
Materials Science, Multidisciplinary
Kristina Lindgren, Peter Domstedt, Peter Szakalos, Mattias Thuvander
Summary: An Fe-10Cr-4Al alloy was analyzed after exposure in high-temperature liquid lead, revealing differences in oxide thickness and layering at different temperatures. The study employed atom probe tomography, transmission electron microscopy, and X-ray scattering to investigate the protective oxide formed on the surface.
MICROSCOPY AND MICROANALYSIS
(2022)
Article
Chemistry, Physical
Antonio Rinaldi, Giuseppe Barbieri, Eduard Kosykh, Peter Szakalos, Claudio Testani
Summary: The technical limit of solar towers today is represented by the temperature that current accumulation and exchange fluids can reach, with molten salts generally adopted and maximum temperatures below 600 degrees C. An ongoing experimental project named Nextower proposes an innovative solution based on liquid lead to accumulate heat at higher temperatures by transferring experience from the field of nuclear plants.
Proceedings Paper
Engineering, Electrical & Electronic
Peter Domstedt, Jesper Ejenstam, Peter Szakalos
2020 20TH IEEE INTERNATIONAL CONFERENCE ON ENVIRONMENT AND ELECTRICAL ENGINEERING AND 2020 4TH IEEE INDUSTRIAL AND COMMERCIAL POWER SYSTEMS EUROPE (EEEIC/I&CPS EUROPE)
(2020)
Proceedings Paper
Physics, Applied
Radu R. Piticescu, Santiago Cuesta-Lopez, Antonio Rinaldi, Marina Urbina, Yi Qin, Peter Szakalos, Alain Largeteau
PHYSICA STATUS SOLIDI C: CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 13 NO 10-12
(2016)
Review
Engineering, Manufacturing
Marina Urbina, Antonio Rinaldi, Santiago Cuesta-Lopez, Arcadii Sobetkii, Anca Elena Slobozeanu, Peter Szakalos, Yi Qin, Mythili Prakasam, Radu-Robert Piticescu, Cedric Ducros, Alain Largeteau
MANUFACTURING REVIEW
(2018)
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.