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Articles de revues sur le sujet « Nanoscale corrosion »

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Auteur : Grafiati
Publié le 14 mars 2023

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1

Zhu, Ping, Qiang Zhang, Yixiao Xia, Kai Sun, Xiu Lin, Huasong Gou, Serge Shil’ko et Gaohui Wu. « Effect of Nanoscale W Coating on Corrosion Behavior of Diamond/Aluminum Composites ». Nanomaterials 13, no 2 (11 janvier 2023) : 307. http://dx.doi.org/10.3390/nano13020307.

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The stability of diamond/aluminum composite is of significant importance for its extensive application. In this paper, the interface of diamond/aluminum composite was modified by adding nanoscale W coating on diamond surface. We evaluated the corrosion rate of nanoscale W-coated and uncoated diamond/aluminum composite by a full immersion test and polarization curve test and clarified the corrosion products and corrosion mechanism of the composite. The introduction of W nanoscale coating effectively reduces the corrosion rate of the diamond/aluminum composite. After corrosion, the bending strength and thermal conductivity of the nanoscale W-coated diamond/aluminum composite are considerably higher than those of the uncoated diamond/aluminum composite. The corrosion loss of the material is mainly related to the hydrolysis of the interface product Al4C3, accompanied by the corrosion of the matrix aluminum. Our work provides guidance for improving the life of electronic devices in corrosive environments.
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Ma, Haoran, et Roland Bennewitz. « Relationship between corrosion and nanoscale friction on a metallic glass ». Beilstein Journal of Nanotechnology 13 (18 février 2022) : 236–44. http://dx.doi.org/10.3762/bjnano.13.18.

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Metallic glasses are promising materials for microdevices, although corrosion and friction limit their effectiveness and durability. We investigated nanoscale friction on a metallic glass in corrosive solutions after different periods of immersion time using atomic force microscopy to elucidate the influence of corrosion on nanoscale friction. The evolution of friction upon repeated scanning cycles on the corroded surfaces reveals a bilayer surface oxide film, of which the outer layer is removed by the scanning tip. The measurement of friction and adhesion allows one to compare the physicochemical processes of surface dissolution at the interface of the two layers. The findings contribute to the understanding of mechanical contacts with metallic glasses under corrosive conditions by exploring the interrelation of microscopic corrosion mechanisms and nanoscale friction.
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Kvryan, Armen, Corey Efaw, Kari Higginbotham, Olivia Maryon, Paul Davis, Elton Graugnard, Hitesh Trivedi et Michael Hurley. « Corrosion Initiation and Propagation on Carburized Martensitic Stainless Steel Surfaces Studied via Advanced Scanning Probe Microscopy ». Materials 12, no 6 (21 mars 2019) : 940. http://dx.doi.org/10.3390/ma12060940.

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Historically, high carbon steels have been used in mechanical applications because their high surface hardness contributes to excellent wear performance. However, in aggressive environments, current bearing steels exhibit insufficient corrosion resistance. Martensitic stainless steels are attractive for bearing applications due to their high corrosion resistance and ability to be surface hardened via carburizing heat treatments. Here three different carburizing heat treatments were applied to UNS S42670: a high-temperature temper (HTT), a low-temperature temper (LTT), and carbo-nitriding (CN). Magnetic force microscopy showed differences in magnetic domains between the matrix and carbides, while scanning Kelvin probe force microscopy (SKPFM) revealed a 90–200 mV Volta potential difference between the two phases. Corrosion progression was monitored on the nanoscale via SKPFM and in situ atomic force microscopy (AFM), revealing different corrosion modes among heat treatments that predicted bulk corrosion behavior in electrochemical testing. HTT outperforms LTT and CN in wear testing and thus is recommended for non-corrosive aerospace applications, whereas CN is recommended for corrosion-prone applications as it exhibits exceptional corrosion resistance. The results reported here support the use of scanning probe microscopy for predicting bulk corrosion behavior by measuring nanoscale surface differences in properties between carbides and the surrounding matrix.
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Liu, Yaru, Qinglin Pan, Xiangdong Wang, Ye Ji, Qicheng Liu, Zhiqi Huang, Zhuowei Peng et andWeiyi Wang. « Computational and Experimental Insights into the Role of Acidic Molecules on the Corrosion Behavior on 7A46 Aluminum Alloy ». Journal of Nanoscience and Nanotechnology 21, no 4 (1 avril 2021) : 2221–33. http://dx.doi.org/10.1166/jnn.2021.19087.

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The corrosion mechanisms for different corrosive media on the aged 7A46 aluminum alloy were systematically investigated at nanoscale level. The combination of empirical intergranular and exfoliation corrosion behavior was employed, and coupled with first-principles calculations. Results revealed that the dispersed distribution of matrix precipitates (MPs) leads to the enhancement of the corrosion resistance pre-ageing (PA) followed by double-ageing (PA-DA) alloy. The deepest corrosion depth of PA-DA alloy was in hydrochloric acid, and the calculation result demonstrates that the passivation effect in combination with the accumulation of corrosion products in nitric acid protect the PA-DA alloy from further corrosion.
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Hoque, Md Ashraful, Chun-Wei Yao, Mukunda Khanal et Ian Lian. « Tribocorrosion Behavior of Micro/Nanoscale Surface Coatings ». Sensors 22, no 24 (17 décembre 2022) : 9974. http://dx.doi.org/10.3390/s22249974.

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Wear and corrosion are common issues of material degradation and failure in industrial appliances. Wear is a damaging process that can impact surface contacts and, more specifically, can cause the loss and distortion of material from a surface because of the contacting object’s mechanical action via motion. More wear occurs during the process of corrosion, in which oxide particles or debris are released from the contacting material. These types of wear debris and accumulated oxide particles released during corrosion cause a combination of wear-corrosion processes. Bringing together the fields of tribology and corrosion research, tribocorrosion is a field of study which deals with mechanical and electrochemical interactions between bodies in motion. More specifically, it is the study of mechanisms caused by the combined effects of mechanical stress and chemical/electrochemical interactions with the environment. Tribocorrosion testing methods provide new opportunities for studying the electrochemical nature of corrosion combined with mechanical loading to establish a synergistic relationship between corrosion and wear. To improve tribological, mechanical, and anti-corrosion performances, several surface modification techniques are being applied to develop functional coatings with micro/nano features. This review of the literature explores recent and enlightening research into the tribocorrosive properties of micro/nano coatings. It also looks at recent discussions of the most common experimental methods and some newer, promising experimental methods in tribocorrosion to elucidate their applications in the field of micro/nano coatings.
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Guo, Tianqi, Jean-Claude Scimeca, Sašo Ivanovski, Elise Verron et Karan Gulati. « Enhanced Corrosion Resistance and Local Therapy from Nano-Engineered Titanium Dental Implants ». Pharmaceutics 15, no 2 (17 janvier 2023) : 315. http://dx.doi.org/10.3390/pharmaceutics15020315.

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Titanium is the ideal material for fabricating dental implants with favorable biocompatibility and biomechanics. However, the chemical corrosions arising from interaction with the surrounding tissues and fluids in oral cavity can challenge the integrity of Ti implants and leach Ti ions/nanoparticles, thereby causing cytotoxicity. Various nanoscale surface modifications have been performed to augment the chemical and electrochemical stability of Ti-based dental implants, and this review discusses and details these advances. For instance, depositing nanowires/nanoparticles via alkali-heat treatment and plasma spraying results in the fabrication of a nanostructured layer to reduce chemical corrosion. Further, refining the grain size to nanoscale could enhance Ti implants’ mechanical and chemical stability by alleviating the internal strain and establishing a uniform TiO2 layer. More recently, electrochemical anodization (EA) has emerged as a promising method to fabricate controlled TiO2 nanostructures on Ti dental implants. These anodized implants enhance Ti implants’ corrosion resistance and bioactivity. A particular focus of this review is to highlight critical advances in anodized Ti implants with nanotubes/nanopores for local drug delivery of potent therapeutics to augment osseo- and soft-tissue integration. This review aims to improve the understanding of novel nano-engineered Ti dental implant modifications, focusing on anodized nanostructures to fabricate the next generation of therapeutic and corrosion-resistant dental implants. The review explores the latest developments, clinical translation challenges, and future directions to assist in developing the next generation of dental implants that will survive long-term in the complex corrosive oral microenvironment.
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7

Farag, Ahmed A. « Applications of nanomaterials in corrosion protection coatings and inhibitors ». Corrosion Reviews 38, no 1 (25 février 2020) : 67–86. http://dx.doi.org/10.1515/corrrev-2019-0011.

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AbstractVarious methodologies are practically used to control corrosion. Coatings are the most widely used to protect metals against corrosion. However, due to the weak resistance of polymer coating against the penetration of corrosive solution to the metal/coating interface, the long-term corrosion resistance of the polymer coating is reduced gradually. Recently, nanoparticles have been added to coatings to improve their chemical, mechanical and optical properties. Nanocoatings either have constituents in the nanoscale or are made out of layers that are under 100 nm. Nanocoatings are used effectively to lessen the impact of a corrosive environment due to its various preferences, such as surface hardness, adhesive quality, long haul and, additionally, high-temperature corrosion opposition, and to improve its tribological properties, and so forth. Moreover, nanocoatings can be utilized in more slender and smoother thickness, which permits adaptability in equipment design and lower upkeep and working expenses. This review covers applications related to the management of metal corrosion, including the use of nanomaterials to produce high-performance corrosion inhibitors and corrosion-resistant coatings.
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8

Scully, John R. « Corrosion chemistry closing comments : opportunities in corrosion science facilitated by operando experimental characterization combined with multi-scale computational modelling ». Faraday Discussions 180 (2015) : 577–93. http://dx.doi.org/10.1039/c5fd00075k.

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Recent advances in characterization tools, computational capabilities, and theories have created opportunities for advancement in understanding of solid–fluid interfaces at the nanoscale in corroding metallic systems. The Faraday Discussion on Corrosion Chemistry in 2015 highlighted some of the current needs, gaps and opportunities in corrosion science. Themes were organized into several hierarchical categories that provide an organizational framework for corrosion. Opportunities to develop fundamental physical and chemical data which will enable further progress in thermodynamic and kinetic modelling of corrosion were discussed. These will enable new and better understanding of unit processes that govern corrosion at the nanoscale. Additional topics discussed included scales, films and oxides, fluid–surface and molecular–surface interactions, selected topics in corrosion science and engineering as well as corrosion control. Corrosion science and engineering topics included complex alloy dissolution, local corrosion, and modelling of specific corrosion processes that are made up of collections of temporally and spatially varying unit processes such as oxidation, ion transport, and competitive adsorption. Corrosion control and mitigation topics covered some new insights on coatings and inhibitors. Further advances inoperandoorin situexperimental characterization strategies at the nanoscale combined with computational modelling will enhance progress in the field, especially if coupling across length and time scales can be achieved incorporating the various phenomena encountered in corrosion. Readers are encouraged to not only to use thisad hocorganizational scheme to guide their immersion into the current opportunities in corrosion chemistry, but also to find value in the information presented in their own ways.
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9

Wang, Xingjun, Weipeng Sun, Wenge Li, Chenglin Zuo, Yong Jiang et Shuangxi Wang. « Development of Waterborne Heavy-Duty Anticorrosive Coatings with Modified Nanoscale Titania ». Coatings 12, no 11 (31 octobre 2022) : 1651. http://dx.doi.org/10.3390/coatings12111651.

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The steel structures of coastal engineering in the moist tropics and subtropics are always under a C5/CX level corrosion environment with high temperature, high humidity, and high salt fog. Anticorrosive waterborne coatings with high weatherability and reliability are urgently to be developed. In this work, one kind of waterborne heavy-duty anticorrosive coatings, with the advantages of excellent corrosion resistance, self-repairing ability, self-cleaning ability, and high film compactness, was successfully achieved through modifying the side chains on the surface morphologies of the spherical nanoscale titania. The micromorphology and structure of the coating were characterized by a scanning electron microscope (SEM), transmission electron microscope (TEM), and atomic force microscope (AFM). The anticorrosion characteristics and forming mechanism of the modified nanoscale titania coating were analyzed. The salt spray tests showed that the neutral salt spray resistance time of the modified nanoscale titania coating was 1440 h. Its durability reached the H level and met the design requirements for 15 years of anticorrosion lifetime. The modified nanoscale titania coatings had been large-scale commercially applied at some typical steel structures under an extreme harsh corrosion environment in one coastal thermal power plant. The results showed that no rusting, peeling, or crack phenomena were observed after 3 years of service under different harsh coastal corrosion conditions.
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Geng, Mingrui, Guangyu He, Zhiping Sun, Jiao Chen, Zhufang Yang et Yuqin Li. « Corrosion Damage Mechanism of TiN/ZrN Nanoscale Multilayer Anti-Erosion Coating ». Coatings 8, no 11 (13 novembre 2018) : 400. http://dx.doi.org/10.3390/coatings8110400.

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TiN/ZrN multilayers can effectively improve the erosion resistance of metals, particularly titanium alloys employed in aero engines. To explore the corrosion damage mechanism of TiN/ZrN nanoscale multilayers (nanolaminate), a novel [TiN/ZrN]100 nanolaminate coating was deposited on Ti-6Al-4V alloys by multi-arc ion plating method. Salt spray corrosion tests and hot corrosion experiment were carried out to evaluate the corrosion resistance of the coating. The corrosion and damage mechanisms were explored with the help of detailed microstructure, phase composition and element distribution characterizations. The salt spray corrosion tests showed that the [TiN/ZrN]100 nanolaminate coating possessed good corrosion resistance, which protected substrate against the corrosion. The low temperature hot corrosion tests showed that the oxidation occurred on the surface of the coating, which improved the oxidation resistance of the sample. However, the oxidized droplets squeezed the coating, and destroyed the oxidized layers. As a result, the coating was peeled off from the substrate. The research highlights the corrosion resistance of the novel TiN/ZrN nanolaminate coating and offers a support for their application in engine compressor blade.
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Arulmozhi, Nakkiran, Thomas J. P. Hersbach et Marc T. M. Koper. « Nanoscale morphological evolution of monocrystalline Pt surfaces during cathodic corrosion ». Proceedings of the National Academy of Sciences 117, no 51 (7 décembre 2020) : 32267–77. http://dx.doi.org/10.1073/pnas.2017086117.

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This paper studies the cathodic corrosion of a spherical single crystal of platinum in an aqueous alkaline electrolyte, to map out the detailed facet dependence of the corrosion structures forming during this still largely unexplored electrochemical phenomenon. We find that anisotropic corrosion of the platinum electrode takes place in different stages. Initially, corrosion etch pits are formed, which reflect the local symmetry of the surface: square pits on (100) facets, triangular pits on (111) facets, and rectangular pits on (110) facets. We hypothesize that these etch pits are formed through a ternary metal hydride corrosion intermediate. In contrast to anodic corrosion, the (111) facet corrodes the fastest, and the (110) facet corrodes the slowest. For cathodic corrosion on the (100) facet and on higher-index surfaces close to the (100) plane, the etch pit destabilizes in a second growth stage, by etching faster in the (111) direction, leading to arms in the etch pit, yielding a concave octagon-shaped pit. In a third growth stage, these arms develop side arms, leading to a structure that strongly resembles a self-similar diffusion-limited growth pattern, with strongly preferred growth directions.
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12

SHI, X., et Q. D. ZHONG. « MICROSTRUCTURE AND PITTING CORROSION OF PLASMA-SPRAYED Ni–Al NANOCOMPOSITE COATING ». Surface Review and Letters 23, no 06 (17 novembre 2016) : 1650051. http://dx.doi.org/10.1142/s0218625x16500517.

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Ni-Al nanoparticles coating (NAN) was manufactured via atmospheric plasma spraying (APS) and thermal treated under hydrogen atmosphere at 1300[Formula: see text]C (TNAN) remained 1 h, and NiAl microparticles coating (NAM) was manufactured as a reference. Nanoscale particles were observed in NAN by TEM, and these nanoscale particles disappeared in TNAN. Many pores and cracks were observed in NAM. Few pores and cracks were observed in NAN, and no pores and cracks were found in TNAN with SEM. A scanning electrochemical microscopy (SECM) testing in 3.5% (wt.) NaCl solution for 3 h revealed that NAM underwent several pitting corrosion, NAN pitting corrosion was relatively minor, and TNAN had no pitting corrosion.
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13

Tang, Pu Hong, Jie Mao et Chong You Feng. « Tribological and Corrosive Properties of Tin/AlN Multilayer Film ». Advanced Materials Research 560-561 (août 2012) : 837–41. http://dx.doi.org/10.4028/www.scientific.net/amr.560-561.837.

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TiN/AlN nanoscale multilayer films were deposited by pulsed laser ablation on silicon, with different argon and nitrogen gas flow rates. The total thickness of the TiN/AlN multilayer film was approximately 1μm. The friction and corrosion properties were studied by tribological and corrosive tests. In tribological tests, ball-on-disc was used to determine coefficients of friction and wear rates. The coefficient of friction against a Si3N4 ball varied considerably between films, as does the wear rate. The lowest coefficient of friction μ=0.97 was shown at sample 1, whereas the other three multilayer films were ranged from 1.0 to 1.5. In corrosion test, the anodic polarization characteristics were measured in a 3.5% NaCl solution at room temperature to examine the corrosion resistance. The potentiodynamic polarization measurements showed that for all the multilayer films the corrosion potential shift to higher values, and the corrosion current density decreased with increasing of nitrogen gas flow rate, which indicate a higher nitrogen partial pressures lead to a better corrosion resistance.
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Yuan, Ching, et Hsing-Lung Lien. « Removal of Arsenate from Aqueous Solution Using Nanoscale Iron Particles ». Water Quality Research Journal 41, no 2 (1 mai 2006) : 210–15. http://dx.doi.org/10.2166/wqrj.2006.024.

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Abstract Removal of As(V) using nanoscale iron particles was examined in batch reactors. Nanoscale iron particles, utilizing zerovalent iron with a diameter less than 100 nm as reactive materials, have been demonstrated to effectively remediate a wide variety of common environmental contaminants. In this study, characterization of nanoscale iron particles and their corrosion products was conducted using SEM-EDX, XRD, BET surface area analyzer and Laser Zee Meter. SEM-EDX results indicated adsorption of arsenic onto the iron surface, and XRD analysis found the formation of iron corrosion products including lepidocrocite, magnetite and/or maghemite at a reaction period of 7 d. Measurements of zeta potential revealed that the nanoscale iron particles have a zero point of charge at pH 4.4. Increasing adsorption amounts of arsenic with decreasing pH can therefore be attributed to the positive surface charge of the particles at lower pH. The maximum adsorption capacity of nanoscale iron particles determined by the Langmuir equation was about 38.2 mg/g. Normalization of the adsorption capacity to specific surface areas provides insight into the importance of iron types and the contact time of reactions in influencing arsenic uptake.
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Cimatu, K. A., S. M. Mahurin, K. A. Meyer et R. W. Shaw. « Nanoscale Chemical Imaging of Zinc Oxide Nanowire Corrosion ». Journal of Physical Chemistry C 116, no 18 (27 avril 2012) : 10405–14. http://dx.doi.org/10.1021/jp301922a.

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Birbilis, N., K. Meyer, B. C. Muddle et S. P. Lynch. « In situ measurement of corrosion on the nanoscale ». Corrosion Science 51, no 8 (août 2009) : 1569–72. http://dx.doi.org/10.1016/j.corsci.2009.05.009.

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Sharma, Manisha, Rohit Nagar, Vijay Kumar Meena et Suman Singh. « Electro-deposition of bactericidal and corrosion-resistant hydroxyapatite nanoslabs ». RSC Advances 9, no 20 (2019) : 11170–78. http://dx.doi.org/10.1039/c9ra00811j.

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Kakooei, Saeid, Mokhtar Che Ismail, Bothi Raja, Hamed Mohebbi, Seyed Sattar Emamian et Majid Moayedfar. « Formation of Nano-Scale FeCO3 Protective Corrosion Product in Carbon Dioxide-Saturated 3% Sodium Chloride Solution ». Key Engineering Materials 740 (juin 2017) : 3–8. http://dx.doi.org/10.4028/www.scientific.net/kem.740.3.

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Corrosion of carbon steel in CO2 saturated NaCl solution contains the formation of FeCO3, as a corrosion product. The protective property of the formed FeCO3 scale layer to corrosion in brine solutions containing CO2 was established as the possible cause of the corrosion rate decrease above 60 °C. In this study, formation of nanoscale FeCO3 film as a corrosion product of X52 carbon steel in CO2-Saturated 3% NaCl solution was investigated. Result showed that corrosion rate decreased after precipitation and formation of protective FeCO3 film in high temperature and high bulk solution pH.
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McMahon, M. E., R. J. Santucci et J. R. Scully. « Advanced chemical stability diagrams to predict the formation of complex zinc compounds in a chloride environment ». RSC Advances 9, no 35 (2019) : 19905–16. http://dx.doi.org/10.1039/c9ra00228f.

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Łosiewicz, B., Magdalena Popczyk, Agnieszka Smołka, Magdalena Szklarska, Patrycja Osak et A. Budniok. « Localized Electrochemical Impedance Spectroscopy for Studying the Corrosion Processes in a Nanoscale ». Solid State Phenomena 228 (mars 2015) : 383–93. http://dx.doi.org/10.4028/www.scientific.net/ssp.228.383.

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This work deals with localized electrochemical impedance spectroscopy (LEIS) which is an improved technique of the commonly used electrochemical impedance spectroscopy (EIS). Thanks to modern structural solutions, the LEIS technique ensures local impedance measurement. Therefore, it is used in the research into point corrosion, such as the pitting corrosion, and in the research into protective coatings or into alloys including alloy steels. This review paper presents the basic theory and the usability of the LEIS based on the literature on the newest research in the field of corrosion.
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Luciano, Giorgio, et Małgorzata Norek. « Editorial for the Special Issue on Corrosion and Etching at Micro/Nanoscale ». Micromachines 14, no 2 (10 février 2023) : 425. http://dx.doi.org/10.3390/mi14020425.

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Mills, D. J. « Eurocorr 2009 : 'Corrosion from the nanoscale to the plant' ». Corrosion Engineering, Science and Technology 44, no 6 (décembre 2009) : 403–4. http://dx.doi.org/10.1179/147842209x12519653000000.

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Ng, Ding-Quan, Yao Chu, Shih-Wei Tan, Shan-Li Wang, Yi-Pin Lin, Chia-Hung Chu, Yun-Liang Soo, Yen-Fang Song et Pei-Jen Chen. « In vivo evidence of intestinal lead dissolution from lead dioxide (PbO2) nanoparticles and resulting bioaccumulation and toxicity in medaka fish ». Environmental Science : Nano 6, no 2 (2019) : 580–91. http://dx.doi.org/10.1039/c8en00893k.

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Abdeen, Dana, Mohamad El Hachach, Muammer Koc et Muataz Atieh. « A Review on the Corrosion Behaviour of Nanocoatings on Metallic Substrates ». Materials 12, no 2 (10 janvier 2019) : 210. http://dx.doi.org/10.3390/ma12020210.

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Growth in nanocoatings technology is moving towards implementing nanocoatings in many sectors of the industry due to their excellent abilities. Nanocoatings offer numerous advantages, including surface hardness, adhesive strength, long-term and/or high-temperature corrosion resistance, the enhancement of tribological properties, etc. In addition, nanocoatings can be applied in thinner and smoother thickness, which allows flexibility in equipment design, improved efficiency, lower fuel economy, lower carbon footprints, and lower maintenance and operating costs. Nanocoatings are utilised efficiently to reduce the effect of a corrosive environment. A nanocoating is a coating that either has constituents in the nanoscale, or is composed of layers that are less than 100 nm. The fine sizes of nanomaterials and the high density of their ground boundaries enable good adhesion and an excellent physical coverage of the coated surface. Yet, such fine properties might form active sites for corrosion attack. This paper reviews the corrosion behaviour of metallic, ceramic, and nanocomposite coatings on the surface of metallic substrates. It summarises the factors affecting the corrosion of these substrates, as well as the conditions where such coatings provided required protection.
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Tulinski, Maciej, Karolina Jurczyk et Mieczyslaw Jurczyk. « Nanoscale Nickel-Free Austenitic Stainless Steel ». Solid State Phenomena 140 (octobre 2008) : 179–84. http://dx.doi.org/10.4028/www.scientific.net/ssp.140.179.

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In this work Ni-free austenitic stainless steels with nanostructure were synthesized by mechanical alloying (MA), heat treatment and nitrogenation of elemental Fe, Cr, Mn and Mo microcrystalline powders. The phase transformation from ferritic to austenitic was confirmed by XRD analysis. The mechanical and corrosion properties of the produced biomaterials were investigated. Additionally, the biocompatibility of nickel-free austenitic stainless steels with nanostructure and microcrystalline 316L steel, were analyzed studying the behaviour of Normal Human Osteoblast (NHOst) cells from Cambrex (CC-2538). An enhancement of the properties due to the nanoscale structures in the bulk consolidated materials was observed.
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Weissmüller, Jörg, Roger C. Newman, Hai-Jun Jin, Andrea M. Hodge et Jeffrey W. Kysar. « Nanoporous Metals by Alloy Corrosion : Formation and Mechanical Properties ». MRS Bulletin 34, no 8 (août 2009) : 577–86. http://dx.doi.org/10.1557/mrs2009.157.

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AbstractNanoporous metals prepared by the corrosion of an alloy can take the form of monolithic, millimeter-sized bodies containing approximately 1015 nanoscale ligaments per cubic millimeter. The ligament size can reach down to the very limits of stability of nanoscale objects. The processes by which nanoporous metals are formed have continued to be fascinating, even though their study in relation to surface treatment, metal refinement, and failure mechanisms can be traced back to ancient times. In fact, the prospect of using alloy corrosion as a means of making nanomaterials for fundamental studies and functional applications has led to a revived interest in the process. The quite distinct mechanical properties of nanoporous metals are one of the focus points of this interest, as relevant studies probe the deformation behavior of crystals at the lower end of the size scale. Furthermore, the coupling of bulk stress and strain to the forces acting along the surface of nanoporous metals provide unique opportunities for controlling the mechanical behavior through external variables such as the electrical or chemical potentials.
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Duerrschnabel, M., E. Gaisina, R. Gaisin, M. Walter, J. Aktaa et M. Rieth. « Nanoscale insights into the corrosion of EUROFER by lithium ceramics ». Corrosion Science 199 (mai 2022) : 110190. http://dx.doi.org/10.1016/j.corsci.2022.110190.

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Cardenas, Henry, Kunal Kupwade-Patil et Sven Eklund. « Corrosion Mitigation in Mature Reinforced Concrete Using Nanoscale Pozzolan Deposition ». Journal of Materials in Civil Engineering 23, no 6 (juin 2011) : 752–60. http://dx.doi.org/10.1061/(asce)mt.1943-5533.0000194.

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Meng, Guozhe, Liyan Wei, Yawei Shao, Tao Zhang, Fuhui Wang, Chaofang Dong et Xiaogang Li. « High Pitting Corrosion Resistance of Pure Aluminum with Nanoscale Twins ». Journal of The Electrochemical Society 156, no 8 (2009) : C240. http://dx.doi.org/10.1149/1.3147257.

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Sugama, Toshifumi, et Keith Gawlik. « Nanoscale Boehmite Filler for Corrosion- and Wear-resistant Polyphenylenesulfide Coatings ». Polymers and Polymer Composites 12, no 3 (mars 2004) : 153–67. http://dx.doi.org/10.1177/096739110401200301.

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Kim, Seong-In, Gi-Ppeum Jeong, Seung-Jae Lee, Jong-Chan Lee, Jun-Myeong Lee, Jin-Hyung Park, Jae-Young Bae et Jea-Gun Park. « Scavenger with Protonated Phosphite Ions for Incredible Nanoscale ZrO2-Abrasive Dispersant Stability Enhancement and Related Tungsten-Film Surface Chemical–Mechanical Planarization ». Nanomaterials 11, no 12 (4 décembre 2021) : 3296. http://dx.doi.org/10.3390/nano11123296.

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For scaling-down advanced nanoscale semiconductor devices, tungsten (W)-film surface chemical mechanical planarization (CMP) has rapidly evolved to increase the W-film surface polishing rate via Fenton-reaction acceleration and enhance nanoscale-abrasive (i.e., ZrO2) dispersant stability in the CMP slurry by adding a scavenger to suppress the Fenton reaction. To enhance the ZrO2 abrasive dispersant stability, a scavenger with protonate-phosphite ions was designed to suppress the time-dependent Fenton reaction. The ZrO2 abrasive dispersant stability (i.e., lower H2O2 decomposition rate and longer H2O2 pot lifetime) linearly and significantly increased with scavenger concentration. However, the corrosion magnitude on the W-film surface during CMP increased significantly with scavenger concentration. By adding a scavenger to the CMP slurry, the radical amount reduction via Fenton-reaction suppression in the CMP slurry and the corrosion enhancement on the W-film surface during CMP performed that the W-film surface polishing rate decreased linearly and notably with increasing scavenger concentration via a chemical-dominant CMP mechanism. Otherwise, the SiO2-film surface polishing rate peaked at a specific scavenger concentration via a chemical and mechanical-dominant CMP mechanism. The addition of a corrosion inhibitor with a protonate-amine functional group to the W-film surface CMP slurry completely suppressed the corrosion generation on the W-film surface during CMP without a decrease in the W- and SiO2-film surface polishing rate.
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Thakur, Abhinay, Savaş Kaya et Ashish Kumar. « Recent Trends in the Characterization and Application Progress of Nano-Modified Coatings in Corrosion Mitigation of Metals and Alloys ». Applied Sciences 13, no 2 (4 janvier 2023) : 730. http://dx.doi.org/10.3390/app13020730.

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Nanotechnology is a discipline of science and engineering that emphasizes developing, modifying, characterizing, and using nanoscale components in a variety of applications. Owing to their multiple advantages, including adhesion strength, surface hardness, long-term and extra-high-temperature corrosion resistance, improvement of interfacial behavior, etc., nanocoatings are efficiently utilized to minimize the influence of a corrosive environment. Additionally, nanocoatings are often applied in thinner and finer concentrations, allowing for greater versatility in instrumentation and reduced operating and maintenance costs. The exemplary physical coverage of the coated substrate is facilitated by the fine dimensions of nanomaterials and the significant density of their grounded boundaries. For instance, fabricated self-healing eco-sustainable corrosion inhibitors including PAC/CuONPs, PAC/Fe3O4NPs, and PAC/NiONPs, with uniform distributions and particulate sizes of 23, 10, and 43 nm, correspondingly, were effective in producing PAC/MONPs nanocomposites which exhibited IE% of 93.2, 88.1, 96.1, and 98.6% for carbon steel corrosion in 1M HCl at the optimum concentration of 250 ppm. Therefore, in this review, further steps are taken into the exploration of the significant corrosion-mitigation potential and applications of nanomaterial-based corrosion inhibitors and nano-modified coatings, including self-healing nanocoatings, natural source-based nanocoatings, metal/metallic ion-based nanocoatings, and carbon allotrope-based nanocoatings, to generate defensive film and protection against corrosion for several metals and alloys. These have been illuminated through the in-depth discussion on characterization techniques such as scanning electron microscopy (SEM), electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (PDP), atomic force microscopy (AFM), energy dispersive spectroscopy (EDS), etc. After providing a general summary of the various types of nanomaterials and their protective mechanisms in wide corrosive media, we subsequently present a viewpoint on challenges and future directions.
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Moore, Stacy, Robert Burrows, Loren Picco, Tomas L. Martin, Scott J. Greenwell, Thomas B. Scott et Oliver D. Payton. « A study of dynamic nanoscale corrosion initiation events using HS-AFM ». Faraday Discussions 210 (2018) : 409–28. http://dx.doi.org/10.1039/c8fd00017d.

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Using HS-AFM measurements it was possible to calculate, and subsequently model, the volumes of metal reacting with respect to time, and so the current densities and ionic fluxes at work. In this manner, the local electrochemistry at nanoscale reaction sites may be reconstructed.
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Liu, Jianjun, Kai Ma, Yutian Ding, Li Feng, Wensheng Li et Lingyu Li. « Microstructure and Properties of an FeCoCrAlCu HEA Coating Synthesized via the Induction Remelting Method ». Coatings 13, no 2 (9 février 2023) : 399. http://dx.doi.org/10.3390/coatings13020399.

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An FeCoCrAlCu HEA coating was prepared on the surface of 45# steel by cold-spray-assisted induction remelting. The results showed that the FeCoCrAlCu HEA coating was composed of BCC and FCC phases. The BCC phase possessed an amplitude-modulated structure consisting of a B1-disordered phase (FeCr) and a B2-ordered phase (AlCo), as well as a nanoscale BCC phase precipitated near grain boundaries. The FCC phase was composed of a solid solution of the Al–Cu matrix and manifested characteristics of a typical twin structure. In addition, the hardness of the FeCoCrAlCu HEA coating was 528.2 HV. The friction coefficient of the FeCoCrAlCu HEA-/Al2O3 pair was 0.379, and the wear rate was 3.96 × 10−5 mm3/(N × m). In 3.5 wt.%NaCl and 5.0 wt.%H2SO4 corrosive media, the FeCoCrAlCu HEA coating had a more positive self-corrosion potential (Ecorr) and a lower corrosion current density (Icorr) than the substrate.
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Merola, C., H. W. Cheng, K. Schwenzfeier, K. Kristiansen, Y. J. Chen, H. A. Dobbs, J. N. Israelachvili et M. Valtiner. « In situ nano- to microscopic imaging and growth mechanism of electrochemical dissolution (e.g., corrosion) of a confined metal surface ». Proceedings of the National Academy of Sciences 114, no 36 (21 août 2017) : 9541–46. http://dx.doi.org/10.1073/pnas.1708205114.

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Reactivity in confinement is central to a wide range of applications and systems, yet it is notoriously difficult to probe reactions in confined spaces in real time. Using a modified electrochemical surface forces apparatus (EC-SFA) on confined metallic surfaces, we observe in situ nano- to microscale dissolution and pit formation (qualitatively similar to previous observation on nonmetallic surfaces, e.g., silica) in well-defined geometries in environments relevant to corrosion processes. We follow “crevice corrosion” processes in real time in different pH-neutral NaCl solutions and applied surface potentials of nickel (vs. Ag|AgCl electrode in solution) for the mica–nickel confined interface of total area ∼0.03 mm2. The initial corrosion proceeds as self-catalyzed pitting, visualized by the sudden appearance of circular pits with uniform diameters of 6–7 μm and depth ∼2–3 nm. At concentrations above 10 mM NaCl, pitting is initiated at the outer rim of the confined zone, while below 10 mM NaCl, pitting is initiated inside the confined zone. We compare statistical analysis of growth kinetics and shape evolution of individual nanoscale deep pits with estimates from macroscopic experiments to study initial pit growth and propagation. Our data and experimental techniques reveal a mechanism that suggests initial corrosion results in formation of an aggressive interfacial electrolyte that rapidly accelerates pitting, similar to crack initiation and propagation within the confined area. These results support a general mechanism for nanoscale material degradation and dissolution (e.g., crevice corrosion) of polycrystalline nonnoble metals, alloys, and inorganic materials within confined interfaces.
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Petrunin, Maxim, Alevtina Rybkina, Tatyana Yurasova et Liudmila Maksaeva. « Effect of Organosilicon Self-Assembled Polymeric Nanolayers Formed during Surface Modification by Compositions Based on Organosilanes on the Atmospheric Corrosion of Metals ». Polymers 14, no 20 (20 octobre 2022) : 4428. http://dx.doi.org/10.3390/polym14204428.

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Reducing the risks caused by losses due to the atmospheric corrosion of metal structures has been relevant for many years and is an important scientific and technical task. Previously, for this purpose, the preliminary modification of the surface of structural metals with solutions of compositions, based on both individual organosilanes and their mixtures with amine-containing corrosion inhibitors, was proposed. Such treatment leads to the formation of self-assembled siloxane polymeric/oligomeric nanoscale layers on the metal surface, which are capable of changing the physicochemical properties of the metal surface (namely, by reducing the tendency of the metal to corrosive destruction). In this work, annual atmospheric corrosion tests of samples of steel, copper, zinc, and aluminum without protection, and samples modified with compositions based on organosilanes in an urban atmosphere, were carried out. It was established (by the gravimetric method) that the corrosion rate of unmodified (without protection) metals is as follows: steel—0.0022 mm/year; aluminum—0.0015 mm/year; copper—0.00018 mm/year; and zinc—0.00023 mm/year. Using gravimetry and optical microscopy, it was shown that the preliminary modification of metal surfaces with compositions based on organosilanes led to the inhibition of both uniform and local corrosion of metals. The corrosion rates of samples that were modified with one-component compositions decreased by almost two times. The maximum inhibitory effect for the studied systems was demonstrated by mixed binary modifying compositions: mixtures of vinyl- and aminosilane, vinylsilane, and benzotriazole. The corrosion rate decreased for all the studied metals. The minimum effect was observed on zinc (2.5 times) and the maximum inhibition of the corrosion rate was obtained on copper (5.1 times). The mechanism of corrosion inhibition by layers formed as a result of surface modification with two-component mixtures was considered.
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Łosiewicz, Bożena, Magdalena Popczyk, Agnieszka Smołka, Magdalena Szklarska, Patrycja Osak et A. Budniok. « On the Use of the Scanning Electrochemical Microscopy in Corrosion Research ». Solid State Phenomena 228 (mars 2015) : 394–409. http://dx.doi.org/10.4028/www.scientific.net/ssp.228.394.

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This paper deals with the basic theory and the usability of Scanning Electrochemical Microscopy (SECM) in corrosion research. The SECM is thein situmethod of surface characterization which is based on the scanning of the tested surface using ultramicroelectrode and simultaneous electrochemical testing of the surface. This technique provides an electrochemical imaging of the surface. Key applications of SECM have been demonstrated based on the newest literature data covering the past two years of the active research in the field of corrosion in a nanoscale.
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Roest, R., Greg Heness, Bruno A. Latella et Besim Ben-Nissan. « Fracture Toughness of Nanoscale Hydroxyapatite Coatings on Titanium Substrates ». Key Engineering Materials 306-308 (mars 2006) : 1307–12. http://dx.doi.org/10.4028/www.scientific.net/kem.306-308.1307.

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In the biomedical field, the surface modification of titanium aims to inhibit wear, reduce corrosion and ion release, and promote biocompatibility. Sol-gel-derived ceramic nanoscale coatings show promise due to their relative ease of production, ability to form a physically and chemically uniform coating over complex geometric shapes, and their potential to deliver exceptional mechanical properties due to their nanocrystalline structure. In this study hydroxyapatite coatings on titanium were investigated for their fracture toughness.
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Shinato, Kebede W., Feifei Huang et Ying Jin. « Principle and application of atomic force microscopy (AFM) for nanoscale investigation of metal corrosion ». Corrosion Reviews 38, no 5 (25 octobre 2020) : 423–32. http://dx.doi.org/10.1515/corrrev-2019-0113.

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AbstractIn this paper, the principle and application of atomic force microscopy (AFM) are reviewed and discussed in detail. Several scientific papers are used to find out data about AFM. The obtained scientific results are summarized to get a better understanding of the method and its application. The application of AFM for corrosion study is discussed in detail, and the possible conclusion is made based on the results of several articles. It is summarized that AFM is an important method to determine the surface phenomena of metal corrosion.
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Barbhuiya, Salim, et Mohammad Choudhury. « Nanoscale Characterization of Glass Flake Filled Vinyl Ester Anti-Corrosion Coatings ». Coatings 7, no 8 (4 août 2017) : 116. http://dx.doi.org/10.3390/coatings7080116.

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Elechiguerra, Jose Luis, Leticia Larios-Lopez, Cui Liu, Domingo Garcia-Gutierrez, Alejandra Camacho-Bragado et Miguel Jose Yacaman. « Corrosion at the Nanoscale : The Case of Silver Nanowires and Nanoparticles ». Chemistry of Materials 17, no 24 (novembre 2005) : 6042–52. http://dx.doi.org/10.1021/cm051532n.

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Percival, Stephen J., Michael A. Melia, Christopher L. Alexander, Derek W. Nelson, Eric J. Schindelholz et Erik D. Spoerke. « Nanoscale thin film corrosion barriers enabled by multilayer polymer clay nanocomposites ». Surface and Coatings Technology 383 (février 2020) : 125228. http://dx.doi.org/10.1016/j.surfcoat.2019.125228.

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Sawada, Hidetaka, Konstantin B. Borisenko, Masahide Shima, Konomi Ikita, Hiroki Hashiguchi, Ichiro Onishi, Eiji Okunishi et Angus I. Kirkland. « Corrosion of Gold by a Nanoscale Gold and Copper Beltlike Structure ». Journal of Physical Chemistry C 123, no 32 (22 juillet 2019) : 19920–26. http://dx.doi.org/10.1021/acs.jpcc.9b04344.

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Schindelholz, Eric John, Michael Anthony Melia, Erik Spoerke, Stephen Percival, Jaime Grunlan et Christopher Lewis Alexander. « Nanoscale Thin Film Corrosion Barriers Enabled By Multilayer Polymer Clay Nanocomposites ». ECS Meeting Abstracts MA2020-02, no 13 (23 novembre 2020) : 1339. http://dx.doi.org/10.1149/ma2020-02131339mtgabs.

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Mills, D. J. « Eurocorr 2009 : 'Corrosion from the nanoscale to the plant' – part 2 ». Corrosion Engineering, Science and Technology 45, no 1 (février 2010) : 3–9. http://dx.doi.org/10.1179/147842210x12627080108222.

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Mills, D. J. « Eurocorr 2009 : 'Corrosion from the nanoscale to the plant' – part 3 ». Corrosion Engineering, Science and Technology 45, no 2 (avril 2010) : 107–12. http://dx.doi.org/10.1179/147842210x12670921486889.

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Mills, D. J. « Eurocorr 2009 : 'Corrosion from the nanoscale to the plant' – part 4 ». Corrosion Engineering, Science and Technology 45, no 3 (juin 2010) : 187–93. http://dx.doi.org/10.1179/147842210x12741744142914.

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Mills, D. J. « Eurocorr 2009 : 'Corrosion from the nanoscale to the plant' – part 5 ». Corrosion Engineering, Science and Technology 45, no 4 (août 2010) : 251–56. http://dx.doi.org/10.1179/147842210x12766782008888.

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Roller, Justin M., M. Josefina Arellano-Jiménez, Haoran Yu, Rishabh Jain, C. Barry Carter et Radenka Maric. « Catalyst nanoscale assembly from the vapor phase on corrosion resistant supports ». Electrochimica Acta 107 (septembre 2013) : 632–55. http://dx.doi.org/10.1016/j.electacta.2013.06.063.

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Crane, Richard A., et Thomas B. Scott. « The Removal of Uranium onto Nanoscale Zero-Valent Iron Particles in Anoxic Batch Systems ». Journal of Nanomaterials 2014 (2014) : 1–9. http://dx.doi.org/10.1155/2014/956360.

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The removal of uranium (U) onto nanoscale zero-valent iron particles has been studied for uranium-bearing mine water and synthetic uranyl solutions in the presence and absence of dissolved oxygen. The work has been conducted in order to investigate the differential nanoparticle corrosion behaviour and associated mechanisms of U removal behaviour in conditions representative of near-surface and deep groundwater systems. Batch systems were analysed over a 28-day reaction period during which the liquid and nanoparticulate solids were periodically analysed to determine chemical evolution of the solutions and particulates. Analysis of aqueous samples using inductively coupled plasma mass spectrometry recorded near-total U removal after 1 hour of reaction in all systems studied. However, in the latter stages of the reaction (after 48 hours), significant rerelease of uranium was recorded for the mine water batch system with dissolved O2present. In contrast, less than 2% uranium rerelease was recorded for the anoxic batch system. Concurrent analysis of extracted nanoparticle solids using X-ray diffraction recorded significantly slower corrosion of the nanoparticles in the anoxic batch system, with residual metallic iron maintained until after 28 days of reaction compared to only 7 days of reaction in systems with dissolved O2present. Results provide clear evidence that the corrosion lifespan and associated U6+removal efficacy of nanoscale zero-valent iron replace enhanced in the absence of dissolved oxygen.
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