Electrochemistry Communications最新文献_第2页

A Review on Recent Advances in Carbon-Based Catalysts for Alcohol Electro-Oxidation 醇电氧化碳基催化剂研究进展

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2026-03-01 Epub Date: 2026-01-15 DOI: 10.1016/j.elecom.2026.108113

Mohammad Bagher Askari , Parisa Salarizadeh , Sadegh Azizi , Mohsen Shojaeifar , Milad Sani , Naser Jahanbakhshi Zadeh

The escalating global demand for sustainable energy technologies has driven significant interest in direct alcohol fuel cells (DAFCs) as efficient power sources. However, their widespread commercialization is hindered by the reliance on expensive platinum-group metal (PGM) catalysts, which suffer from high cost, susceptibility to CO poisoning, and limited stability. This creates a critical knowledge gap: the urgent need for developing high-performance, cost-effective, and durable catalytic systems that can efficiently facilitate the alcohol electro-oxidation reaction (AOR). This review addresses this gap by comprehensively examining the recent advances in carbon-based materials as transformative catalyst supports and PGM-free alternatives for AOR. The fundamental premise is that carbon nanostructures such as graphene, carbon nanotubes, and heteroatom-doped carbons offer a uniquely tunable platform. Their exceptional conductivity, high surface area, and versatile functionalization capabilities make them ideal for enhancing catalytic performance. We explore how the strategic integration of noble and transition metals with these carbon supports can create synergistic effects, significantly boosting catalytic activity, improving durability, and enhancing resistance to CO intermediate poisoning. By moving beyond conventional PGM catalysts, this review provides a roadmap for designing next-generation electrocatalysts. It highlights how advanced engineering of carbon supports and hybrid nanostructures can optimize catalyst performance, paving the way for more economically viable and efficient energy conversion devices. Ultimately, this body of work not only consolidates critical recent breakthroughs but also charts a course for developing sustainable catalytic systems crucial for the future of renewable energy technology.

全球对可持续能源技术的需求不断上升，促使人们对直接酒精燃料电池（DAFCs）作为高效能源产生了极大的兴趣。然而，它们的广泛商业化受到依赖昂贵的铂族金属（PGM）催化剂的阻碍，这些催化剂成本高，易受CO中毒影响，稳定性有限。这造成了一个关键的知识缺口：迫切需要开发高性能、低成本和耐用的催化系统，以有效地促进醇电氧化反应（AOR）。这篇综述通过全面研究碳基材料作为变革性催化剂载体和不含pgm的AOR替代品的最新进展来解决这一差距。基本前提是碳纳米结构，如石墨烯、碳纳米管和杂原子掺杂碳提供了一个独特的可调平台。其优异的导电性，高表面积和多功能功能化能力使其成为提高催化性能的理想选择。我们探讨了贵金属和过渡金属与这些碳载体的战略性整合如何产生协同效应，显著提高催化活性，提高耐久性，并增强对CO中间体中毒的抵抗力。通过超越传统的PGM催化剂，本综述为设计下一代电催化剂提供了路线图。它强调了碳支撑和混合纳米结构的先进工程如何优化催化剂性能，为更经济可行和高效的能量转换设备铺平了道路。最终，这项工作不仅巩固了最近的重大突破，而且为开发对可再生能源技术的未来至关重要的可持续催化系统指明了方向。

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引用次数: 0

Perovskite air electrodes for reversible protonic ceramic electrochemical cells: Architecture design and degradation mitigation 可逆质子陶瓷电化学电池的钙钛矿空气电极：结构设计和降解缓解

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2026-03-01 Epub Date: 2026-02-19 DOI: 10.1016/j.elecom.2026.108123

Hua Zhang, Xiaochao Xin, Shurui Li, Siyi Qin, Xuezhen OuYang, Chao Liu, Yifan Jiang, Weisheng Zhong, Yuansong Luo, Weijie Ni, Yangyang Zhao

Reversible Protonic Ceramic Electrochemical Cells (R-PCECs) have emerged as a cutting-edge technology for efficient energy storage and conversion, boasting distinct advantages in fuel flexibility, high energy efficiency, and low operating temperatures compared to traditional solid oxide devices. This review centers on the critical role of air electrodes in R-PCECs, delving into the design principles of multifunctional air electrode architectures and strategies for mitigating degradation mechanisms. It commences by outlining the fundamental working principles of R-PCECs in both fuel cell and electrolysis modes, with a particular emphasis on the pivotal functions of air electrodes in facilitating oxygen reduction and evolution reactions. Subsequently, it systematically elaborates on various advanced air electrode designs, encompassing composite electrode structures, perovskite optimization strategies, and defect-mediated performance enhancement techniques. Additionally, the paper analyzes key degradation pathways such as pollutant-induced failure and structural deterioration, and presents corresponding mitigation approaches involving material engineering, operational parameter optimization, and surface modification. Finally, the current challenges and future research directions in the development of high-performance, durable air electrodes for R-PCECs are highlighted, aiming to guide the advancement of this transformative energy technology.

可逆质子陶瓷电化学电池（R-PCECs）是一种高效能量存储和转换的前沿技术，与传统的固体氧化物器件相比，具有燃料灵活性、高能效和低工作温度等明显优势。本文综述了空气电极在r - pcec中的关键作用，深入探讨了多功能空气电极结构的设计原则和减轻降解机制的策略。首先概述了r - pcec在燃料电池和电解模式下的基本工作原理，特别强调了空气电极在促进氧还原和进化反应中的关键作用。随后，它系统地阐述了各种先进的空气电极设计，包括复合电极结构，钙钛矿优化策略和缺陷介导的性能增强技术。此外，本文还分析了污染物引起的失效和结构退化等关键降解途径，并提出了相应的缓解方法，包括材料工程、操作参数优化和表面改性。最后，重点介绍了R-PCECs高性能、耐用空气电极的发展面临的挑战和未来的研究方向，旨在指导这一变革性能源技术的发展。

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引用次数: 0

Lithium deposition-guided pore stabilization in bioprotein separators: Insights from synchrotron radiation ultra-small angle X-ray scattering evidence 锂沉积引导的生物蛋白分离器孔隙稳定：来自同步辐射超小角x射线散射证据的见解

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2026-02-01 Epub Date: 2025-12-25 DOI: 10.1016/j.elecom.2025.108103

Ning Wu , Junhao Wang , Jinxi Bao , Haiting Shi , Xianyan Wu , Feng Tian , Bo Zhu , Zhiwei Xu

Bioproteins have been demonstrated as effective modifiers for lithium anode interfaces due to their abundant functional group structures and porous architectures with high specific surface areas. However, the relationship between the evolution of pore structure and lithium ions (Li⁺) transport during battery cycling remains unclear. In this study, we propose that the abundant functional group sites on the protein surface can interact with the pores to homogenize the deposition of Li⁺, while the uniform deposition of Li⁺ is synergistically coupled with the stabilization of the porous structure through this reorganization process. To investigate the structural evolution of the separator's pore architecture during cycling, we integrated a silk fibroin (SF) network with commercial PP separators and performed ex situ characterization using synchrotron radiation ultra small angle X-ray scattering (SR-USAXS) at different cycling intervals. The results indicate that the integrity of the pore structure remains uncompromised, correlating with effective suppression of lithium dendrite growth. SR-USAXS analysis further reveals the underlying mechanism: the SF modified layer undergoes a subtle, electrochemically induced structural reorganization. This process leads to a stabilization of the nanoporous framework, which is essential for maintaining uniform ion transport. This work highlights the critical role of protein-modified porous architectures in electrolyte modification and cycling stability for lithium metal batteries, while providing insights for developing bioprotein-based electrolyte separators.

生物蛋白由于其丰富的官能团结构和具有高比表面积的多孔结构而被证明是锂阳极界面的有效改性剂。然而，电池循环过程中孔隙结构的演化与锂离子（Li+）输运之间的关系尚不清楚。在本研究中，我们提出蛋白质表面丰富的官能团位点可以与孔隙相互作用，使Li+的沉积均匀化，而Li+的均匀沉积又通过这一重组过程与多孔结构的稳定协同耦合。为了研究隔膜在循环过程中孔隙结构的演变，我们将丝素（SF）网络与商用PP隔膜整合在一起，并在不同的循环间隔使用同步辐射超小角x射线散射（SR-USAXS）进行了非原位表征。结果表明，孔隙结构的完整性没有受到损害，这与有效抑制锂枝晶生长有关。SR-USAXS分析进一步揭示了潜在的机制：SF修饰层经历了微妙的电化学诱导的结构重组。这一过程导致纳米孔框架的稳定，这对于保持均匀的离子传输是必不可少的。这项工作强调了蛋白质修饰多孔结构在锂金属电池电解质修饰和循环稳定性中的关键作用，同时为开发基于生物蛋白的电解质分离器提供了见解。

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引用次数: 0

A novel electrochemical deposition of copper conductor on flexible printed circuit boards 一种在柔性印刷电路板上电化学沉积铜导体的方法

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2026-02-01 Epub Date: 2025-12-14 DOI: 10.1016/j.elecom.2025.108090

Wen Hsi Lee , Yi-Xue Chen , Hao Han Lin

This study employs a screen-printed aluminum paste to form electrode patterns on a substrate. Subsequently, a galvanic displacement reaction is utilized to replace the surface of the printed aluminum electrode with a copper seed layer. Finally, copper electroplating is performed to deposit copper onto the seed layer. This innovative additive aluminum-displacement-plus-electroplating process utilizes upward electroplating from the displacement-formed copper seed layer to enhance the electrical properties and smoothness of the copper conductor, while the downward electroplating strengthens the mechanical properties of the copper conductors.

To ensure the complete conversion of the printed aluminum electrodes into copper electrodes, crystalline copper sulfate powder is incorporated into the aluminum paste. After 20 min of displacement followed by 30 min of electroplating, the internal aluminum is fully converted into copper, producing a copper layer approximately 100 μm thick. The resulting copper exhibits a resistivity of 2 × 10⁻⁸ Ω·m.

Compared with conventional subtractive copper foil conductor processes, this method achieves comparable mechanical, chemical, and electrical properties. Furthermore, the simplified process reduces material waste and supports the pursuit of net-zero carbon emissions.

本研究采用丝网印刷铝浆在基板上形成电极图案。随后，利用电位移反应将印刷铝电极的表面替换为铜种子层。最后，电镀铜，将铜沉积在种子层上。这种创新的添加剂铝-位移+电镀工艺利用位移形成的铜籽层向上电镀来提高铜导体的电学性能和光滑度，而向下电镀则增强了铜导体的机械性能。为了保证印刷的铝电极完全转化为铜电极，在铝浆中加入结晶硫酸铜粉末。经过20分钟的位移和30分钟的电镀，内部铝完全转化为铜，形成约100 μm厚的铜层。所得铜的电阻率为2 × 10−8 Ω·m。与传统的减法铜箔导体工艺相比，该方法实现了相当的机械，化学和电学性能。此外，简化的过程减少了材料浪费，并支持追求净零碳排放。

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引用次数: 0

Mechanistic investigation of localized electrochemical corrosion in defective regions of CuNi alloys under dynamic marine environment using a φ0.1 mm wire beam electrode 采用φ0.1 mm线束电极研究海洋动态环境下CuNi合金缺陷区局部电化学腐蚀机理

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2026-02-01 Epub Date: 2025-12-21 DOI: 10.1016/j.elecom.2025.108101

Xuemei Wang , Qingdong Zhong , Yongle Xie , Shujian Zhang , Bin Xie , Lan Ma , Yucheng Yu

In this study, wire beam electrode technology, combined with electrochemical impedance spectroscopy (EIS) and surface morphology analysis, was employed to systematically investigate the localized corrosion behavior of depressed and protrusion defects on B18 CuNi alloy in a dynamic 3.5 wt% NaCl solution. The results demonstrate that the lowest region of the depressed defect and its upstream side exhibit intense anodic dissolution due to enhanced turbulent mass transfer and cl⁻ enrichment, with the local corrosion intensity index reaching 0.35 within 24 h. Vortex impacts induced by fluid separation on the downstream side of convex defects lead to greater corrosion depth compared to the top region. Compared with the protrusion defect features, upstream side beneath the depressed features exhibits a higher density of localized anodic sites and larger current values. This observation confirms that samples with shallower defect depths tend to experience more pronounced radial deepening. EIS and surface roughness analyses further reveal that shear forces disrupt the dynamic evolution of the double-layer structure of corrosion product films. Collectively, these findings elucidate the local corrosion mechanisms under the synergistic influence of dynamic interference and electrochemical processes

本研究采用线束电极技术，结合电化学阻抗谱（EIS）和表面形貌分析，系统研究了B18 CuNi合金在3.5 wt% NaCl动态溶液中凹陷和突出缺陷的局部腐蚀行为。结果表明：由于湍流传质增强和cl−富集，凹陷缺陷的底部及其上游表现出强烈的阳极溶解，局部腐蚀强度指数在24 h内达到0.35。流体分离引起的涡流冲击对凸起缺陷下游的腐蚀深度大于顶部区域。与突出缺陷特征相比，凹陷缺陷特征下方的上游侧具有更高的局部阳极位点密度和更大的电流值。这一观察证实，缺陷深度较浅的样品往往会经历更明显的径向加深。EIS和表面粗糙度分析进一步表明，剪切力破坏了腐蚀产物膜双层结构的动态演变。总的来说，这些发现阐明了动态干扰和电化学过程协同作用下的局部腐蚀机制

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引用次数: 0

Next-generation CoMoS3/carbon sphere nanoflower catalyst for sustainable hydrogen production through urea oxidation-assisted water electrolysis 新一代CoMoS3/碳球纳米花催化剂用于尿素氧化辅助水电解可持续制氢

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2026-02-01 Epub Date: 2025-12-23 DOI: 10.1016/j.elecom.2025.108102

Neshanth Vadivel , Mani Govindasamy , Arun Prasad Murthy , Chih-Yu Kuo

Development of effective and economical electrocatalysts for hydrogen production is of particular importance in sustainable energy policies. In this study, we present a novel cobalt molybdenum sulphide/carbon sphere (CoMoS₃/CS) nanoflower synthesized by a facile hydrothermal process that has a high electrochemically active surface area and dense catalytic sites. The CoMoS₃/CS rose-like nanoflower catalyst has excellent trifunctional activity towards the hydrogen evolution reaction (HER), oxygen evolution reaction (OER) and urea oxidation reaction (UOR). It shows a low HER overpotential of 93 mV at 10 mA cm², superior to that of CoS/CS (143 mV) and CS (242 mV). For UOR, the oxidation potential is 1.33 V vs. RHE with a Tafel slope of 49 mV dec¹ and an OER oxidation potential of 1.67 V with a Tafel slope of 64 mV dec¹. Both HER and UOR long-term electrochemical stability was established through chronoamperometry and voltammetry tests with little performance loss. In a hybrid water electrolysis configuration (HER || UOR), the catalyst facilitated effective hydrogen production with significantly lower cell voltage of 1.46 V compared to conventional HER || OER system. The incorporation of carbon spheres in this nanostructured catalyst improved the active surface area and facilitated synergistic interactions resulting in high catalytic activity, and durability. This study emphasizes the design of next generation electrocatalysts for hybrid water electrolysis to produce sustainable hydrogen.

开发高效经济的制氢电催化剂在可持续能源政策中具有特别重要的意义。在这项研究中，我们提出了一种新型的钴钼硫化/碳球纳米花（CoMoS3/CS），具有高的电化学活性表面积和密集的催化位点。CoMoS3/CS玫瑰状纳米花催化剂对析氢反应（HER）、析氧反应（OER）和尿素氧化反应（UOR）具有优异的三官能团活性。在10 mA cm2下，HER过电位为93 mV，优于CoS/CS （143 mV）和CS （242 mV）。对于UOR，氧化电位为1.33 V，相对于RHE， Tafel斜率为49 mV dec1， OER氧化电位为1.67 V， Tafel斜率为64 mV dec1。通过计时安法和伏安法测试，确定了HER和UOR的长期电化学稳定性，且性能损失很小。在混合水电解配置（HER || UOR）中，与传统的HER || OER系统相比，催化剂促进了有效的氢气生产，电池电压显著降低，为1.46 V。碳球在纳米结构催化剂中的掺入提高了活性表面积，促进了协同作用，从而提高了催化活性和耐久性。本研究的重点是设计用于混合水电解的下一代电催化剂，以产生可持续的氢。

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引用次数: 0

Voltage optimization strategy to reduce electric field non-uniformity and improve efficiency in electrodialysis systems 降低电场不均匀性，提高电渗析系统效率的电压优化策略

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2026-02-01 Epub Date: 2025-12-29 DOI: 10.1016/j.elecom.2025.108104

Shakeel Ahmad , Jinsong Tao , Rahat Ali , Yigang He , Yong Gu , Qing Liu

Electrodialysis (ED) is a membrane-based water treatment technology that uses electricity to move ions through ion exchange membranes (IEMs) for desalination and ionic purification. Anion exchange membranes (AEMs) and cation exchange membranes (CEMs) are commonly used in this process. However, the local differences in ion concentration distributions caused by the permeability of the IEM in ED systems lead to the emergence of secondary electrical fields (SEFs). This results in an increase in the local electric field strength, which degrades the efficiency of ED. This study traces the mechanism that creates non-uniformity due to SEF and derives an equation for the distribution properties governing the SEF. Field experiments and simulations were conducted to quantitatively assess the influence of the applied voltage on the performance of the ED process. In addition, the effects of various pulsed electric field (PEF) modes on electric field distribution and overall separation efficiency were investigated. Simulation results indicate that increasing the applied voltage promotes ion accumulation at membrane interfaces and strengthens the SEF. This results in increased non-uniformity in the electric field distribution, ultimately reducing the efficiency. Furthermore, field experiments confirm that the non-uniformity induced by the SEF in the ED system can be reduced by using PEF, thus improving ED efficiency.

电渗析（ED）是一种基于膜的水处理技术，利用电力使离子通过离子交换膜（IEMs）进行脱盐和离子净化。该工艺常用阴离子交换膜（AEMs）和阳离子交换膜（CEMs）。然而，由于电畴的渗透性导致离子浓度分布的局部差异，导致二次电场的产生。这导致局部电场强度增加，从而降低了ED的效率。本研究追踪了由于SEF而产生不均匀性的机制，并推导了控制SEF分布特性的方程。通过现场实验和模拟，定量评估了外加电压对放电过程性能的影响。此外，还研究了不同脉冲电场（PEF）模式对电场分布和整体分离效率的影响。模拟结果表明，施加电压的增加促进了离子在膜界面的积累，增强了SEF。这导致电场分布的不均匀性增加，最终降低了效率。此外，现场实验还证实，使用PEF可以降低SEF在ED系统中引起的不均匀性，从而提高ED效率。

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引用次数: 0

Navigating the complexities of electrocatalytic water splitting: a critical examination of pitfalls and considerations in performance evaluation 导航电催化水分解的复杂性：在性能评估陷阱和考虑的关键检查

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2026-01-01 Epub Date: 2025-12-08 DOI: 10.1016/j.elecom.2025.108094

Rana Said , Munthar Kadhim Abosaoda , Nathier Abas Ibrahim , M.M. Rekha , Subhashree Ray , Kattela Chennakesavulu , Renu Sharma , Atreyi Pramanik , Gurumurthy Ramaiah

Despite the rapid rise of electrocatalysis research, notably in hydrogen and oxygen evolution reactions (HER/OER), the discipline is still plagued by discrepancies in testing, data reporting, and performance benchmarking. This review examines the most important but sometimes ignored factors influencing catalyst performance, ranging from electrode preparation and electrolyte contaminants to the complexities of Tafel slope extraction and Faradaic efficiency measurement. This review critically examines the limitations of frequently used metrics, including overpotential, electrochemically active surface area (ECSA), and Tafel slopes, and demonstrates how uncontrollable variables can significantly distort reported activity. This study emphasizes the critical need for standardization by comparing normalization methods (geometric area, catalyst mass, and ECSA-based), as well as investigating how electrochemical impedance spectroscopy, double-layer capacitance, and product selectivity measurements are frequently misapplied or misinterpreted. We also highlight the worrying absence of raw data sharing and reproducibility in the literature, which impedes meaningful comparison and slows technological advancement. Finally, we offer a thorough checklist and protocols to build a universal benchmarking technique. This assessment, which highlights both technological insights and systemic obstacles, serves as a road map for a more transparent, reliable, and expedited electrocatalysis discovery process.

尽管电催化研究迅速兴起，特别是在氢和氧析反应（HER/OER）方面，但该学科在测试、数据报告和性能基准方面仍然存在差异。本文综述了影响催化剂性能的最重要但有时被忽视的因素，从电极制备和电解质污染物到塔菲尔斜率提取和法拉第效率测量的复杂性。这篇综述严格检查了常用指标的局限性，包括过电位、电化学活性表面积（ECSA）和Tafel斜率，并展示了不可控变量如何显著扭曲报告的活性。本研究通过比较标准化方法（几何面积、催化剂质量和基于ecsa的），以及研究电化学阻抗谱、双层电容和产品选择性测量如何经常被误用或误解，强调了标准化的迫切需要。我们还强调了文献中令人担忧的原始数据共享和可重复性的缺乏，这阻碍了有意义的比较并减缓了技术进步。最后，我们提供了一个全面的检查表和协议来构建一个通用的基准测试技术。该评估强调了技术见解和系统障碍，为更透明、可靠和快速的电催化发现过程提供了路线图。

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引用次数: 0

Droplet corrosion of steel with simulated atmospheric dust from mixtures of ammonium salts 用铵盐混合物模拟大气粉尘对钢的液滴腐蚀

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2026-01-01 Epub Date: 2025-12-03 DOI: 10.1016/j.elecom.2025.108092

Lea Seeger, Renate Lobnig, Claudia Schöberl, Stephan Appel

The corrosion of steel with 100 μl droplets of 0.171 M solutions of various ammonium salts and their mixtures, simulating atmospheric dust, is compared to corrosion with NaCl.

The key methods are in-situ optical monitoring in a self-built air-conditioned observation chamber and under a microscope with humidity-control, as well as the determination of corrosion products and their crystallite sizes ex-situ using XRD.

The cations, Na⁺ or NH₄⁺ influence the width of the cathodic zone of the droplet and the occurrence of secondary spreading through the pH value of the resulting hydroxide solution in the cathodic zone.

Anions influence the resulting type of corrosion products, assumingly by incorporation in the intermediate product green rust. With Cl⁻ anions the detected corrosion product was γ-FeOOH, with SO₄²⁻ anions additionally α-FeOOH forms. Immediately after droplet application NO₃⁻ has a passivating effect, but as soon as active corrosion begins, NO₃⁻ actually accelerates it. The rapid corrosion with NO₃⁻ was assumed to be the reason for smaller crystallite sizes of the main corrosion product γ-FeOOH.

The mixture of the three anions Cl⁻, SO₄²⁻ and NO₃⁻, as found in atmospheric dust, leads to a synergistic effect. The aggressive anions Cl⁻ and SO₄²⁻ suppress the passivating effect of NO₃⁻anions leading to accelerated corrosion and the formation of a thick layer of magnetite, which do not form with single salt solutions.

在模拟大气粉尘的0.171 M不同铵盐及其混合物溶液中，用100 μl液滴对钢的腐蚀进行了比较，并与NaCl的腐蚀进行了比较。关键方法是在自建的空调观察室和湿度控制的显微镜下进行现场光学监测，以及利用x射线衍射法测定腐蚀产物及其晶体尺寸。阳离子Na+或NH4+影响液滴阴极区的宽度，并通过阴极区生成的氢氧根溶液的pH值影响二次扩散的发生。阴离子影响腐蚀产物的类型，假设是通过掺入中间产物绿锈。Cl -阴离子腐蚀产物为γ-FeOOH， SO42 -阴离子腐蚀产物为α-FeOOH。在液滴作用后，NO3−立即有钝化作用，但一旦活性腐蚀开始，NO3−实际上加速了腐蚀。NO3−的快速腐蚀是导致主要腐蚀产物γ-FeOOH晶粒尺寸较小的原因。在大气尘埃中发现的三种阴离子Cl−、SO42−和NO3−的混合会产生协同效应。侵略性阴离子Cl -和SO42 -抑制了NO3 -阴离子的钝化作用，加速了腐蚀，形成了一层厚的磁铁矿，这是单一盐溶液不能形成的。

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引用次数: 0

Study on the electrochemical corrosion resistance of 5083 aluminum alloy under heat treatment processes 5083铝合金热处理过程中耐电化学腐蚀性能的研究

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2026-01-01 Epub Date: 2025-11-13 DOI: 10.1016/j.elecom.2025.108079

Meixue Song , Ruifeng Dong , Tianyuan Xu

This study systematically investigates the influence mechanisms of heat treatment processes on the electrochemical corrosion resistance of hot-rolled 5083 aluminum alloy sheets, aiming to provide theoretical support for enhancing the service life of marine aluminum alloys. By integrating first-principles calculations with experimental data, the evolution patterns of second-phase composition and size under different annealing temperatures and holding times were revealed, elucidating their impact mechanisms on corrosion behavior. Conclusions: The typical second phases in 5083 aluminum alloy are Mg₂Si, Al₆Mn, Al₃Ce, Al₃Fe, and Al₆(Mn, Fe). Between 150–400 °C, second phase particle size slightly decreased, while it significantly increased at 400–500 °C. Electrochemical test results indicate that the corrosion resistance of 5083 aluminum alloy is poorest at an annealing temperature of 350 °C. The variation in corrosion resistance primarily depends on the evolution of the β phase (Al₃Mg₂) and the dissolution and coarsening of the Al₆Mn, Al₃Fe, and Al₆(Mn, Fe) phases.

本研究系统研究了热处理工艺对热轧5083铝合金板材电化学耐腐蚀性能的影响机理，旨在为提高船用铝合金的使用寿命提供理论支持。通过第一性原理计算与实验数据相结合，揭示了不同退火温度和保温时间下第二相组成和尺寸的演化规律，阐明了它们对腐蚀行为的影响机制。结论：5083铝合金中典型的第二相为Mg2Si、Al6Mn、Al3Ce、Al3Fe和Al6（Mn, Fe）。在150 ~ 400℃之间，第二相粒径略有减小，而在400 ~ 500℃之间，第二相粒径明显增大。电化学测试结果表明，5083铝合金在350℃退火时的耐蚀性最差。耐蚀性的变化主要取决于β相（Al3Mg2）的演变和Al6Mn、Al3Fe和Al6（Mn, Fe）相的溶解和粗化。

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引用次数: 0