Electrochemistry Communications最新文献_第2页

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 : 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

Exploring the sub-nanometre domain: Evaluating mass loading effects on platinum nanocluster catalysts fabricated via magnetron sputtering 探索亚纳米领域：评价磁控溅射制备的铂纳米团簇催化剂的质量负载效应

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-12-11 DOI: 10.1016/j.elecom.2025.108095

Richard O.D. Clark , Eman Alharbi , Gazi Aliev , Wolfgang Theis , Emerson C. Kohlrausch , Jesum Alves Fernandes , Neil V. Rees

Herein we demonstrate the use of magnetron-sputtered, low weight-loading platinum on carbon black catalysts as a pathway to reducing mass of platinum in electrolyser and fuel cell applications. In contrast to wet chemical methods, which often require multi-step syntheses involving toxic chemicals and washing post synthesis, magnetron sputtering can produce catalysts for use immediately after production. Scanning transmission electron microscope (STEM) analysis shows these bespoke catalysts possess a bimodal distribution of particle sizes, with nanoparticles approximately half the size of commercial equivalents (ca.1 vs > 2 nm) and a distinct distribution of single metal atoms, dimers and trimers. Measurement of the electrochemically active surface area (ECSA) revealed a higher surface area across all fabricated catalysts, ranging from 17 % to 51 % higher than commercial equivalents. This increased surface area provides a comparable hydrogen evolution reaction (HER) onset potential at a fraction of the platinum loading, indicating both that kinetics are not affected measurably by changes in platinum size and that the Pt particles are well dispersed across the support. In contrast, the oxygen reduction reaction (ORR) activity showed clear kinetic differences due to particle size with the onset potential varying by over 100 mV across the catalyst samples, reflecting the influence of stable platinum nanoclusters on catalytic activity. Rotating ring disc electrode (RRDE) voltammetry offered additional insight into the size and dispersion of the platinum nanoclusters across the samples, elucidating differences between them

在此，我们展示了在炭黑催化剂上使用磁控溅射，低重量负载铂作为减少电解槽和燃料电池应用中铂质量的途径。湿化学法通常需要涉及有毒化学品和合成后洗涤的多步骤合成，与之相反，磁控溅射可以在生产后立即产生使用的催化剂。扫描透射电子显微镜（STEM）分析显示，这些定制的催化剂具有粒径的双峰分布，纳米颗粒尺寸约为商业当量的一半（约1纳米vs 2纳米），单金属原子、二聚体和三聚体的分布明显。电化学活性表面积（ECSA）的测量表明，所有制备的催化剂的表面积都比商业等价物高17%至51%。这种增加的表面积提供了相当的析氢反应（HER）开始电位，在铂负载的一小部分，这表明动力学不受铂尺寸变化的可测量影响，并且铂颗粒很好地分散在整个载体上。相比之下，氧还原反应（ORR）活性因催化剂粒径的不同而表现出明显的动力学差异，不同催化剂样品的起始电位相差超过100 mV，反映了稳定铂纳米团簇对催化活性的影响。旋转环盘电极（RRDE）伏安法为铂纳米团簇在样品中的大小和分散提供了额外的见解，阐明了它们之间的差异

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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 : 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

Effect of dopamine modification on the oxygen reduction reaction activity of Pt/C catalyst 多巴胺修饰对Pt/C催化剂氧还原反应活性的影响

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-12-04 DOI: 10.1016/j.elecom.2025.108093

Guoyu Shi , Donald A. Tryk , Akihiro Iiyama , Makoto Uchida , Hironori Osada , Katsuyoshi Kakinuma

Modifying Pt-based catalysts with organic molecules offers a promising strategy to enhance oxygen reduction reaction (ORR) performance. In this study, dopamine (DA) was used to modify Pt/C, and its impact on electrochemical behavior and ORR activity was systematically investigated. Through DA modification, the ORR activity can be improved to 1.5 times that of pristine Pt/C. This enhancement is linked to DA's ability to maintain a more metallic Pt surface by preventing excessive oxidation. Density functional theory (DFT) calculations indicate that DA binds moderately strongly to the Pt surface, based on π-bonds between Pt and the aromatic carbons in a flat configuration that partially covers the surface while leaving active sites accessible. DA effectively inhibits the formation of surface-blocking OH_top–OH_bridge pairs on (111) terraces, thus preserving O₂ adsorption sites at (110) edges and unpaired OH_top sites, which are necessary in the ORR. Thus, this work provides mechanistic insight into DA's function and suggests a practical route to improving fuel cell performance through organic–inorganic interface engineering.

用有机分子修饰pt基催化剂是提高氧还原反应（ORR）性能的一种很有前途的方法。本研究采用多巴胺（DA）修饰Pt/C，系统研究了其对电化学行为和ORR活性的影响。通过DA改性，ORR活性可提高到原始Pt/C的1.5倍。这种增强与DA通过防止过度氧化来保持更金属化的Pt表面的能力有关。密度泛函理论（DFT）计算表明，基于Pt和芳族碳之间的π键，DA与Pt表面的结合强度中等，其平面构型部分覆盖表面，但保留了活性位点。DA有效地抑制了（111）阶地上表面阻断OHtop - ohbridge对的形成，从而保留了（110）边缘的O2吸附位点和未配对的OHtop位点，这是ORR中必需的。因此，这项工作提供了对DA功能的机理洞察，并提出了通过有机-无机界面工程提高燃料电池性能的实用途径。

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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 : 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

Influence of atomic layer deposition on nickel hydroxide phase transitions in nickel foam 原子层沉积对泡沫镍中氢氧化镍相变的影响

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-12-03 DOI: 10.1016/j.elecom.2025.108091

Samutr Assavachin , Surat Prempluem , Somlak Ittisanronnachai , Sukritta Janprakhon , Montree Sawangphruk

This study investigates how Al₂O₃ and V₂O₅ coatings deposited on nickel foam by atomic layer deposition (ALD) modifies its electrochemical phase evolution in alkaline media. Phase transitions and surface kinetics were characterized using cyclic voltammetry (CV), in situ X-ray diffraction (XRD), electrochemical impedance spectroscopy (EIS), and Tafel analysis. Bare NF exhibits a positive cathodic peak shift for α-Ni(OH)₂ formation over 100 CV cycles attributed to surface activation. NF coated with Al₂O₃ (NF-A) showed a larger shift (+90 mV) indicating enhanced charge transfer kinetics and reduced energy barrier. In contrast, V₂O₅-coated NF (NF-V) showed no shift suggesting a suppressed surface kinetics. These shifts disappear at higher scan rates suggesting a kinetic effect rather than a diffusion-induced behavior. Tafel and EIS measurements show that NF-A has the lowest charge transfer resistance, while NF-V exhibits the largest resistance. In situ XRD provides direct evidence for α-Ni(OH)₂ formation during extended cycling under alkaline conditions. These results demonstrate that different ALD coatings can selectively modulate surface kinetics and phase accessibility of nickel foam which can contribute to the design of nickel-based electrodes for phase-specific electrochemical applications.

研究了Al2O3和V2O5原子层沉积（ALD）对泡沫镍在碱性介质中电化学相演化的影响。采用循环伏安法（CV）、原位x射线衍射（XRD）、电化学阻抗谱（EIS）和Tafel分析对相变和表面动力学进行了表征。由于表面活化，裸NF在100 CV循环中α-Ni(OH)2的形成表现出正的阴极峰移。Al2O3包覆的NF （NF- a）表现出较大的位移（+90 mV），表明电荷转移动力学增强，能量势垒降低。相比之下，v2o5涂层的NF （NF- v）没有发生位移，表明表面动力学受到抑制。这些位移在更高的扫描速率下消失，表明这是一种动力学效应，而不是扩散诱导的行为。Tafel和EIS测量表明，NF-A的电荷转移电阻最小，而NF-V的电荷转移电阻最大。原位XRD提供了α-Ni(OH)2在碱性条件下延长循环生成的直接证据。这些结果表明，不同的ALD涂层可以选择性地调节泡沫镍的表面动力学和相可及性，这有助于设计用于相特异性电化学应用的镍基电极。

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引用次数: 0

Leaching and sequential electrowinning of cu and Sn from silicon solar modules 从硅太阳能组件中浸出铜和锡的顺序电积

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-12-02 DOI: 10.1016/j.elecom.2025.108088

R. Adcock , T. Chen , N. Click , M. Tao

Metal separation and recovery are a key aspect of silicon solar module recycling. This paper provides a fundamental understanding of the leaching and electrowinning in hydrochloric acid of two critical metals in silicon solar cells: copper and tin. A leaching model for solder-coated copper wires was developed to reveal rate orders with respect to concentrations of leaching agents and stirring. Kinetic parameters for electrowinning of copper and tin were determined through Tafel and electrochemical impedance spectroscopy analysis. Cyclic voltammetry was used to determine redox potentials of copper and tin allowing their electrochemical separation. Finally high recovery rates and high metal purity, both over 99 %, were achieved for copper and tin through sequential electrowinning. Hydrochloric acid leaching and sequential electrowinning provide a simple and effective option for the recovery of copper and tin from silicon solar modules.

金属分离和回收是硅太阳能组件回收的一个关键方面。本文对硅太阳能电池中铜和锡两种关键金属在盐酸中的浸出和电积过程进行了基本的认识。建立了镀锡铜线的浸出模型，揭示了浸出剂浓度和搅拌的速率顺序。采用塔菲尔法和电化学阻抗谱法测定了电积铜和锡的动力学参数。采用循环伏安法测定铜和锡的氧化还原电位，使其实现电化学分离。通过序次电积，获得了铜和锡的高回收率和高金属纯度，均超过99%。盐酸浸出和顺序电积为从硅太阳能组件中回收铜和锡提供了一种简单有效的选择。

引用次数: 0

Prelithiation of silicon thin film anodes using ion implantation for lithium ion batteries 锂离子电池用离子注入法制备硅薄膜阳极预锂化

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-11-29 DOI: 10.1016/j.elecom.2025.108089

Charaf Cherkouk , Marc Ferch , Robert Hahn , Tina Weigel , Thomas Köhler , Christian Ludt , Hartmut Stöcker , Annekatrin Delan , Frans Munnik , Ulrich Kentsch , Christoph Folgner , Thomas Schumann , Viktor Begeza , Yu Cheng , Shengqiang Zhou , Lars Rebohle

Silicon is the most promising anode material for lithium ion batteries (LIBs) because of its high theoretical specific capacity of 3590 mAhg⁻¹ in the Li_3.73Si phase at room temperature. However, two important issues such as volume expansion after the lithiation and the growth of a solid electrolyte interface during the cycling on the anodic side hinder the full use of Si as a negative electrode in modern LIBs. Here, we prelithiate the Si thin film on Cu foil using Li⁺ ion implantation at room temperature with a fluence of 10¹⁶ ions/ cm² and three implantation energies of 1, 2 and 3 keV in order to achieve different depth profiles. The ion implantation enables a high controllability and homogeneity of the Li ion profile in the near surface region of the Si anode. Using both a half and full cell configuration versus lithium nickel cobalt aluminum oxide (NCA) in a liquid electrolyte (1 M LiPF₆, EC:DMC 1:1 and 2 wt% of FEC), the implanted Si anodes were cycled and compared to Si anodes without implantation. The morphology and the structure of the Si anodes were investigated using scanning electron microscopy (SEM) in combination with elemental analysis by energy-dispersive X-ray spectroscopy (EDX) and x-ray diffraction (XRD). Depth profiles of the implanted Li⁺ in the Si anode obtained by elastic recoil detection analysis (ERDA) reveal that the distribution of the implanted Li⁺ extends from the surface to a depth of ca. 80 nm (deeper than predicted by simulations), which is caused by the roughness of the Cu foil. The roughness of the Si anode on Cu was analyzed using atomic force microscopy (AFM).

硅是锂离子电池最有前途的负极材料，因为它在室温下在Li3.73Si相中具有3590 mAhg−1的高理论比容量。然而，两个重要的问题，如锂化后的体积膨胀和循环过程中阳极侧固体电解质界面的生长，阻碍了Si作为负极在现代锂离子电池中的充分利用。在室温下，以1016个离子/ cm2和1、2、3 keV三种注入能量将Si薄膜在Cu箔上预锂化，以获得不同的深度分布。离子注入使硅阳极近表面Li离子分布具有较高的可控性和均匀性。在液态电解质（1 M LiPF6， EC:DMC 1:1和2 wt% FEC）中使用半电池和全电池配置与锂镍钴铝氧化物（NCA）进行对比，将植入的Si阳极循环并与未植入的Si阳极进行比较。采用扫描电子显微镜（SEM）、能量色散x射线能谱（EDX）和x射线衍射（XRD）相结合的方法研究了硅阳极的形貌和结构。通过弹性反冲检测分析（ERDA）获得了Li+在Si阳极中的深度分布，结果表明Li+的分布从表面延伸到深度约80 nm（比模拟预测的深度更深），这是由Cu箔的粗糙度引起的。采用原子力显微镜（AFM）分析了铜表面硅阳极的粗糙度。

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引用次数: 0

Uniform secondary current distribution at disk electrodes under Tafel kinetics enabled by concentric current-shielding rings 在塔菲尔动力学下，同心电流屏蔽环使圆盘电极上的二次电流分布均匀

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications

Pub Date : 2025-11-24 DOI: 10.1016/j.elecom.2025.108087

Vaishnavi Sree Jeganathan, Rohan Akolkar

Non-uniform secondary current distribution at rotating disk electrodes (RDE) is a common problem when using resistive electrolyte media or large applied currents. In a recent publication, we have shown that auxiliary electrodes such as the ring of a rotating ring-disk electrode (RRDE) can help suppress current non-uniformities at the disk enabling reliable electroanalytical measurements. However, this previous work considered linear kinetics where current distribution non-uniformities were moderate. In the present contribution, we consider current distribution non-uniformities encountered under Tafel kinetics. We show, for the case of 2,5-dihydroxy-1,4-benzoquinone (DHBQ) reduction, that optimally chosen ring conditions serve to provide effective shielding at the disk edge rendering the overall disk current distribution to be uniform. Numerical modeling and scaling analysis (using the Wagner number) are presented to aid a user in determining the optimal ring current density for achieving uniform disk current distribution under Tafel kinetics. This approach is especially useful when studying soluble-soluble redox transitions for which, unlike deposit distribution in electrodeposition, the current distribution non-uniformity is not visually apparent.

当使用阻性电解质介质或大电流时，旋转圆盘电极（RDE）的二次电流分布不均匀是一个常见问题。在最近发表的一篇文章中，我们已经证明了辅助电极，如旋转环盘电极（RRDE）的环，可以帮助抑制磁盘上的电流不均匀性，从而实现可靠的电分析测量。然而，这项先前的工作考虑了线性动力学，其中电流分布不均匀性是中等的。在目前的贡献中，我们考虑在塔菲尔动力学下遇到的电流分布不均匀性。我们表明，在2,5-二羟基-1,4-苯醌（DHBQ）还原的情况下，最佳选择的环条件有助于在磁盘边缘提供有效的屏蔽，从而使整个磁盘电流分布均匀。数值模拟和尺度分析（使用瓦格纳数）提出，以帮助用户确定最佳环电流密度，以实现均匀的磁盘电流分布在塔菲尔动力学。这种方法在研究可溶-可溶性氧化还原转变时特别有用，因为与电沉积中的沉积分布不同，电流分布的不均匀性在视觉上并不明显。

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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 : 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