Showing papers on "Corrosion published in 2020"
TL;DR: A side reaction-free and dendrite-free Zn electrode is developed, the effectiveness of which is also convincing in a MnO2 /ZnS@Zn full-cell with 87.6% capacity retention after 2500 cycles.
Abstract: Although Zn metal has been regarded as the most promising anode for aqueous batteries, it persistently suffers from serious side reactions and dendrite growth in mild electrolyte. Spontaneous Zn corrosion and hydrogen evolution damage the shelf life and calendar life of Zn-based batteries, severely affecting their industrial applications. Herein, a robust and homogeneous ZnS interphase is built in situ on the Zn surface by a vapor-solid strategy to enhance Zn reversibility. The thickness of the ZnS film is controlled via the treatment temperature, and the performance of the protected Zn electrode is optimized. The dense ZnS artificial layer obtained at 350 °C not only suppresses Zn corrosion by forming a physical barrier on the Zn surface, but also inhibits dendrite growth via guiding the Zn plating/stripping underneath the artificial layer. Accordingly, a side reaction-free and dendrite-free Zn electrode is developed, the effectiveness of which is also convincing in a MnO2 /ZnS@Zn full-cell with 87.6% capacity retention after 2500 cycles.
578 citations
TL;DR: This is the first demonstration of an all-solid-state Zn-ion battery based on a newly developed electrolyte, which meanwhile solves the deep-seated hydrogen evolution and dendrite growth problem in traditional ZN-ion batteries.
Abstract: An ionic-liquid-based Zn salt electrolyte is demonstrated to be an effective route to solve both the side-reaction of the hydrogen evolution reaction (HER) and Zn-dendrite growth in Zn-ion batteries. The developed electrolyte enables hydrogen-free, dendrite-free Zn plating/stripping over 1500 h cycle (3000 cycles) at 2 mA cm-2 with nearly 100% coulombic efficiency. Meanwhile, the oxygen-induced corrosion and passivation are also effectively suppressed. These features bring Zn-ion batteries an unprecedented long lifespan over 40 000 cycles at 4 A g-1 and high voltage of 2.05 V with a cobalt hexacyanoferrate cathode. Furthermore, a 28.6 µm thick solid polymer electrolyte of a poly(vinylidene fluoride-hexafluoropropylene) film filled with poly(ethylene oxide)/ionic-liquid-based Zn salt is constructed to build an all-solid-state Zn-ion battery. The all-solid-state Zn-ion batteries show excellent cycling performance of 30 000 cycles at 2 A g-1 at room temperature and withstand high temperature up to 70 °C, low temperature to -20 °C, as well as abuse test of bending deformation up to 150° for 100 cycles and eight times cutting. This is the first demonstration of an all-solid-state Zn-ion battery based on a newly developed electrolyte, which meanwhile solves the deep-seated hydrogen evolution and dendrite growth problem in traditional Zn-ion batteries.
308 citations
TL;DR: In this article, the main part of this work is to investigate different corrosive environments for copper and its alloys and their corrosion inhibitors used in such environments to protect copper, according to the literature, the corrosion inhibition behavior of organic corrosion inhibitors and their derivatives in comparison with inorganic ones are further evaluated.
292 citations
TL;DR: It is pioneeringly demonstrated that decorating the Zn surface with a dual-functional metallic indium (In) layer, acting as both a corrosion inhibitor and a nucleating agent, is a facile but effective strategy to suppress both drastic corrosion and dendrite growth.
Abstract: Rechargeable aqueous zinc (Zn) ion-based energy storage systems have been reviving recently because of their low cost and high safety merits; however, they still suffer from the problems of corrosion and dendrite growth on Zn metal anodes that cause gas generation and early battery failure Unfortunately, the corrosion problem has not received sufficient attention until now Here, it is pioneeringly demonstrated that decorating the Zn surface with a dual-functional metallic indium (In) layer, acting as both a corrosion inhibitor and a nucleating agent, is a facile but effective strategy to suppress both drastic corrosion and dendrite growth Symmetric cells assembled with the treated Zn electrodes can sustain up to 1500 h of plating/stripping cycles with an ultralow voltage hysteresis (54 mV), and a 5000 cycle-life is achieved for a prototype full cell This work will instigate the further development of aqueous metal-based energy storage systems
291 citations
TL;DR: In this article, an overview of superhydrophobic surfaces (SHS) is provided, and then their fabrication methods discussed, and the corrosion resistance of these SHS fabricated by various methods and their chemical stability and mechanical stability are reviewed.
288 citations
TL;DR: In this paper, the anodes are prepared by electroplating zinc on different substrates (copper foam, copper foil, and Ni foam), namely, Cu foam@Zn, Cu foil, Ni foam, etc., and they are screened as optimal anode, for which they exhibit small voltage hysteresis, high Coulombic efficiency and negligible self-discharge.
271 citations
TL;DR: In this article, an anti-corrosive metallic Cu is introduced to Zn metal anode to construct a uniform Cu/Zn composite with dense structure, which is electrochemically converted to Cu-Zn alloy/Zns composite during battery cycling.
263 citations
TL;DR: In this paper, the authors reviewed the cutting-edge advances and progress of biodegradable surface coatings upon Mg alloys over the last decades, and aimed to build up a knowledge framework of surface modification on bioregradable Mg alloy.
259 citations
TL;DR: The present study aims at the synthesis of environmentally benign corrosion inhibitor, namely 2-amino-4-(5-hydroxy-3-methyl-1H-pyrazole-4-yl)-4H-chromene- 3-carbonitrile (PCP), and corrosion inhibition evaluation for N80 steel in 15% HCl.
229 citations
TL;DR: In this paper, a corrosion protection coating with an excellent barrier, and superior active anti-corrosion characteristics was constructed through a one-pot synthesis method of zeolitic imidazolate framework-8 (ZIF-8) on the graphene oxide sheets.
216 citations
TL;DR: In this paper, a comprehensive review about the BP materials (metallic, non-porous graphite and composite materials) and corresponding fabrication methods, flow field layouts, and PEM fuel cells applications is presented.
TL;DR: The changes of corrosion current density and impedance modulus of Q235 steel in inhibitor solutions showed that the as-prepared carbon dots presented a valid protective effect on steel in 1 M HCl solution.
TL;DR: In this article, a comprehensive and in-depth summary of the mechanisms behind zinc-water interaction problems, as well as state-of-the-art progress in the protection of the zinc electrode via intrinsic zinc alloy, zinc surface coating and electrolyte engineering in full pH range aqueous electrolyte.
TL;DR: Experimental and theoretical investigations suggest that the synergistic effect between oxyhydroxides and sulfide species accounts for the high activity of nickel–iron hydroxides.
Abstract: Nickel-iron composites are efficient in catalyzing oxygen evolution. Here, we develop a microorganism corrosion approach to construct nickel-iron hydroxides. The anaerobic sulfate-reducing bacteria, using sulfate as the electron acceptor, play a significant role in the formation of iron sulfide decorated nickel-iron hydroxides, which exhibit excellent electrocatalytic performance for oxygen evolution. Experimental and theoretical investigations suggest that the synergistic effect between oxyhydroxides and sulfide species accounts for the high activity. This microorganism corrosion strategy not only provides efficient candidate electrocatalysts but also bridges traditional corrosion engineering and emerging electrochemical energy technologies.
01 Dec 2020
TL;DR: ILs demonstrate sufficient design versatility as a type of model lubricant for meeting the requirements of mechanical engineering and their perspectives and future development are discussed in this review.
Abstract: Ionic liquids (ILs) have emerged as potential lubricants in 2001. Subsequently, there has been tremendous research interest in ILs from the tribology society since their discovery as novel synthetic lubricating materials. This also expands the research area of ILs. Consistent with the requirement of searching for alternative and eco-friendly lubricants, IL lubrication will experience further development in the coming years. Herein, we review the research progress of IL lubricants. Generally, the tribological properties of IL lubricants as lubricating oils, additives and thin films are reviewed in detail and their lubrication mechanisms discussed. Considering their actual applications, the flexible design of ILs allows the synthesis of task-specific and tribologically interesting ILs to overcome the drawbacks of the application of ILs, such as high cost, poor compatibility with traditional oils, thermal oxidization and corrosion. Nowadays, increasing research is focused on halogen-free ILs, green ILs, synthesis-free ILs and functional ILs. In addition to their macroscopic properties, the nanoscopic performance of ILs on a small scale and in small gaps is also important in revealing their tribological mechanisms. It has been shown that when sliding surfaces are compressed, in comparison with a less polar molecular lubricant, ion pairs resist "squeeze out" due to the strong interaction between the ions of ILs and oppositely charged surfaces, resulting in a film that remains in place at higher shear forces. Thus, the lubricity of ILs can be externally controlled in situ by applying electric potentials. In summary, ILs demonstrate sufficient design versatility as a type of model lubricant for meeting the requirements of mechanical engineering. Accordingly, their perspectives and future development are discussed in this review.
TL;DR: A review of the literature confirmed that the intrinsic corrosion rate of high-purity Mg as measured by weight-loss is 0.3mm/y in a concentrated chloride solution as mentioned in this paper.
TL;DR: The Zn@ZIF anode shows highly reversible, dendrite‐free Zn plating/stripping behavior under a broad range of current densities, and enables a full Zn ion battery with outstanding cyclic stability (10 000 cycles).
Abstract: Zinc (Zn) holds great promise as a desirable anode material for next-generation rechargeable batteries. However, the uncontrollable dendrite growth and low coulombic efficiency of the Zn plating/stripping process severely impede further practical applications of Zn-based batteries. Here, these roadblocks are removed by using in situ grown zeolitic imidazolate framework-8 (ZIF-8) as the ion modulation layer to tune the diffusion behavior of Zn2+ ions on Zn anodes. The well-ordered nanochannels and N species of ZIF-8 can effectively homogenize Zn2+ flux distribution and modulate the plating/stripping rate, ensuring uniform Zn deposition without dendrite growth. The Zn corrosion and hydrogen evolution are also alleviated by the insulating nature of ZIF-8, resulting in high coulombic efficiency. Therefore, the Zn@ZIF anode shows highly reversible, dendrite-free Zn plating/stripping behavior under a broad range of current densities, and a symmetric cell using this anode can work correctly up to 1200 h with a low polarization at 2 mA cm-2. Moreover, this ultrastable Zn@ZIF anode also enables a full Zn ion battery with outstanding cyclic stability (10 000 cycles).
TL;DR: In this article, the authors summarize the applications of various metal-organic frameworks (MOFs) derived electrocatalysts (including MOF-derived single-atom catalysts, and MOFs-derived metal-free catalysts) in fuel cells and metal-air batteries, and discuss how to increase mass density of effective active sites and protect the active sites from damage and corrosion.
TL;DR: In this article, the results of polarization curves showed that DSA, APD and DPD reveal good anti-corrosion capacity and can simultaneously inhibit the cathodic and anodic reactions of copper.
TL;DR: In this article, the corrosion behavior and mechanism of as-cast and as-extruded Mg-Zn-Gd-Zr alloys with specific ternary phases are investigated using scanning electron microscope (SEM), scanning Kelvin probe force microscope (SKPFM), immersion and electrochemical tests.
TL;DR: In this paper, the performance of trifunctional epoxy polymer namely triglycidyl ether tribisphenol A of ethylene (TGETBAE) as corrosion inhibition for carbon steel in 1.0 M HCl solution was evaluated using experimental (WL), electrochemical impedance spectroscopy (EIS), UV-Visible spectroscopic and scanning electron microscope (SEM)) and computational (molecular dynamics (MD) simulations, density functional theory (DFT) and complexation calculations) approaches.
TL;DR: In this paper, the authors reviewed the research and development status of magnesium alloy, with more attention to the methodologies and technologies adopted to improve the properties of AZ91 alloy, and addressed the key issues hindering the applications of magnesium alloys for structural and biomedical applications.
Abstract: The work reviews the research and development status of magnesium alloy, with more attention to the methodologies and technologies adopted to improve the properties of AZ91 alloy. The drive force of utilizing magnesium alloys for automotive and biomedical application is light weightiness and biocompatibility respectively. However, the softness and high activity of magnesium alloys result in high wear and high corrosion rate respectively. One of the essential factors influencing the properties of magnesium alloy is its microstructure. Consequently, the grain size, morphology and distribution of phase constituents influence the properties of magnesium alloys. The modification of microstructure through processing route (hot working and cold working), heat treatment, and alloying elements improves the mechanical, corrosion, biocompatible, and tribological properties of magnesium alloys. Besides microstructural modification processes, addition of reinforcements, and coatings improves the properties of magnesium alloys. This article emphasis on the recent research on the technologies to improve the microstructure, hardness, tensile strength, ductility, yield strength, wear resistance, and corrosion resistance of magnesium alloy AZ91. Moreover, this review addresses the key issues hindering the applications of magnesium alloys for structural and biomedical applications.
TL;DR: In this paper, Dardagan Fruit (DF) extract was tested as inhibitor corrosion for mild steel protection in 1 M HCl solution using electrochemical techniques and it was found that DF has good corrosion protection ability.
Abstract: In this study, Dardagan Fruit (DF) from Bingӧl - Turkey was tested as inhibitor corrosion for mild steel protection in 1 M HCl solution using electrochemical techniques. The surface of mild steel was examined by scanning electron microscopy (SEM) and atomic force microscopy (AFM). Elemental composition of the surface after exposing to test solutions was analyzed with the help of energy dispersive X-ray spectroscopy (EDX). Contact angle measurements were also performed to get information about the surface properties. Spectroscopic studies were performed to determine major components, chemical structure and adsorption mechanism of the extract. The excess surface charge of mild steel was determined using electrochemical impedance spectroscopy (EIS) and an inhibition mechanism was proposed. It was found that DF has good corrosion protection ability. The inhibition of corrosion rate reduces when concentration of DF and exposure time are increased and reaches 92% after 1 h and 97% after 6 h immersion to 3000 ppm inhibitor containing corrosive media. The high protection ability was assigned to formation of a homogenously distributed protective film over the metal.
TL;DR: In this paper, a castor oil-based corrosion inhibitor (COCI) is used to suppress acidic corrosion at all concentrations, particularly at high temperatures, and the results demonstrate that the COCI has a considerable ability to suppress acidification at all levels.
TL;DR: A hybrid physics-model-based and data-driven remaining useful life (RUL) estimation methodology of structure systems considering the influence of multiple causes by using dynamic Bayesian networks (DBNs).
Abstract: In dynamic complex environments, the degradation of structure systems is generally caused not by a single factor but by multiple ones, and the process is subject to a high level of uncertainty. This article contributes a hybrid physics-model-based and data-driven remaining useful life (RUL) estimation methodology of structure systems considering the influence of multiple causes by using dynamic Bayesian networks (DBNs). The structure model and parameter model of DBNs for the degradation process caused by a single factor are established on the basis of theoretical or empirical physical models, thereby solving the problem of insufficient data. An RUL estimation model is subsequently established by integrating these degradation process models. The RUL value is obtained from the time difference between the detection point and predicted failure point, which is determined using the failure threshold of performance. The sensor data and expert knowledge can be input into the estimation model to update the RUL value whenever necessary. The subsea pipelines in offshore oil and gas subsea production systems are adopted to demonstrate the proposed methodology. The degradation processes with fatigue, corrosion, sand erosion, and internal waves are modeled using DBNs, and the RUL is estimated using a DBN-based RUL methodology.
TL;DR: In this article, a nanostructured eutectic high entropy alloy (EHEA) of composition FeCrNiCoNb0.5 (atomic %) was developed.
TL;DR: A review of the current research status of super-hydrophobic coating on Mg alloys can be found in this paper, where a number of strategies have been introduced to develop a super-phobic coating.
TL;DR: In this paper, the microstructure and mechanical behavior of the dissimilar welded joint (DWJ) between ferritic-martensitic steel and austenitic grade steel along with its application have been summarized in Ultra Super Critical (USC) power plant.
TL;DR: In this article, the mechanisms of particle adsorption and composition in PEO thin films in addition to the effect of particle addition on the microstructure, composition and corrosion behavior of coatings that were applied on magnesium alloys.