International Journal of Electrochemical Science最新文献_第2页

Biomimetic structures for water management in proton exchange membrane fuel cells: A review 质子交换膜燃料电池水管理的仿生结构研究进展

IF 2.4 4区化学 Q4 ELECTROCHEMISTRY

International Journal of Electrochemical Science

Pub Date : 2026-04-01 Epub Date: 2026-02-09 DOI: 10.1016/j.ijoes.2026.101319

Zengsheng Wang , Jingwen Yang , Hongyan Wang , Na Xiao , Ansheng Li , Ruili Wang , Wuyi Ming

Water management in proton exchange membrane fuel cells (PEMFCs) is a critical factor affecting performance metrics such as power density, and plays a vital role in the service life and durability of the proton exchange membrane. By emulating biological designs, biomimetic technique has driven the development of novel materials and structures for fuel cells, propelling their innovation and sustainable development. This study systematically reviews the progress from biomimetic innovations to their engineering applications within the field of water management for PEMFCs. Then, this review sequentially explores: biomimetic flow field designs based on leaf vein/root system fractal theory; biomimetic gas diffusion layer (GDL) structures; and biomimetic catalyst layer and membrane designs enabling molecular-scale water management. By comparing the advantages and limitations of different biomimetic strategies in transport efficiency, drainage capacity, and stability, this study reveals the potential value of biomimetic approaches in improving water management performance in fuel cells. In view of the remaining challenges associated with manufacturing complexity, durability assessment, and scalable fabrication of biomimetic structures, this work further points out that future research may build on the synergy among materials science, biology, and advanced manufacturing technologies, while introducing data-driven methods as auxiliary tools to support the optimized design and performance evaluation of biomimetic structures.

质子交换膜燃料电池（pemfc）的水管理是影响功率密度等性能指标的关键因素，对质子交换膜的使用寿命和耐久性起着至关重要的作用。仿生技术通过模拟生物设计，推动了新型燃料电池材料和结构的发展，推动了燃料电池的创新和可持续发展。本研究系统地回顾了从仿生创新到其在pemfc水管理领域的工程应用的进展。然后，本文对基于叶脉/根系分形理论的仿生流场设计进行了综述；仿生气体扩散层（GDL）结构；仿生催化剂层和膜设计实现了分子尺度的水管理。通过比较不同仿生策略在运输效率、排水能力和稳定性方面的优势和局限性，本研究揭示了仿生方法在改善燃料电池水管理性能方面的潜在价值。鉴于仿生结构的制造复杂性、耐久性评估和可扩展制造等方面存在的挑战，本工作进一步指出，未来的研究可以建立在材料科学、生物学和先进制造技术的协同作用基础上，同时引入数据驱动方法作为辅助工具，支持仿生结构的优化设计和性能评估。

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引用次数: 0

SOC-SOH co-estimation across the battery life cycle using a simplified electrochemical model with adaptive parameter updating and LSTM 基于自适应参数更新和LSTM的简化电化学模型的电池寿命周期SOC-SOH共估计

IF 2.4 4区化学 Q4 ELECTROCHEMISTRY

International Journal of Electrochemical Science

Pub Date : 2026-04-01 Epub Date: 2026-01-19 DOI: 10.1016/j.ijoes.2026.101300

Dianliang Yang , Nailiang Qi , Mingying Huo , Yijiao Liu , Chao Lyu , Mengda Duan

As a core function of the battery management system, state of charge (SOC) estimation has been the focus of investigation. However, previous research does not adequately consider the bidirectional interference effect between battery state of health (SOH) and SOC estimation. This leads to an increase in the error in SOC estimation after battery aging. The role of bidirectional interference is addressed by a hybrid algorithmic framework that updates the battery model parameters and co-estimates SOC/SOH. Specifically, a simplified electrochemical model (SEM) with online parameter update is first constructed in this paper, and the SOC estimation algorithm is built based on this model with the EKF algorithm. The SEM parameters are updated with the help of parameter sensitivity analysis. Subsequently, a battery SOH estimation model is built using the long short-term memory (LSTM) algorithm. It should be noted that the LSTM algorithm uses voltage and current data from the battery when its SOC is between 20% and 80%. Finally, a hybrid SOC/SOH estimation framework with multi-time scale update is constructed. Based on the method proposed in this paper, the SOC estimation error under the New European Driving Cycle (NEDC) working condition throughout the life cycle of the lithium-ion battery is less than 0.8%.

作为电池管理系统的核心功能，荷电状态估计一直是研究的热点。然而，以往的研究并未充分考虑电池健康状态（SOH）与电池荷电状态估算之间的双向干扰效应。这将导致电池老化后SOC估计误差的增加。双向干扰的作用通过一个混合算法框架来解决，该框架可以更新电池模型参数并共同估计SOC/SOH。具体而言，本文首先构建了一个参数在线更新的简化电化学模型（SEM），并在此模型的基础上结合EKF算法构建了SOC估计算法。利用参数灵敏度分析对SEM参数进行了更新。随后，利用长短期记忆（LSTM）算法建立电池SOH估计模型。值得注意的是，LSTM算法使用电池SOC在20%到80%之间时的电压和电流数据。最后，构建了一个多时间尺度更新的SOC/SOH混合估计框架。基于本文提出的方法，锂离子电池在新欧洲驾驶循环（NEDC）工况下全寿命周期SOC估算误差小于0.8%。

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引用次数: 0

Failure mechanism of epoxy Zn–Al composite coatings on Q235 steel in industrial marine environments Q235钢表面环氧锌铝复合涂层在工业海洋环境中的失效机理

IF 2.4 4区化学 Q4 ELECTROCHEMISTRY

International Journal of Electrochemical Science

Pub Date : 2026-03-01 Epub Date: 2025-12-30 DOI: 10.1016/j.ijoes.2025.101276

Hao Yu , Hao Zhang , Yesheng Huang , Chang Liu , Haoyu Wu , Pan Yi , Jin Gao , Kui Xiao

To investigate the aging failure mechanism of epoxy Zn-Al composite coatings on steel grid supports in industrial marine environments, the corrosion conditions of “high Cl⁻ + high concentrations of industrial acid gases + alternating wet-dry cycles” in the Caofeidian Port Area of Bohai Bay were taken as the testing background. A salt spray/wet-dry alternating cycle test combined with outdoor exposure testing was adopted. Coating performance and morphological evolution were analyzed via thickness measurements, adhesion tests, electrochemical impedance spectroscopy (EIS), 3D laser confocal microscopy, scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS). Results indicate a three-stage failure progression: Initial protective stage (Cycles 0–3): The coating remains dense and smooth with minimal color change, gradual thickness increase, and high adhesion. EIS results show |Z| at 0.01 Hz is approximately 10⁸–10⁹ Ω·cm², demonstrating a significant physical barrier function. Localized failure stage (4 cycles): Localized rust spots appear on the coating surface, thickness growth accelerates, adhesion decreases abruptly, |Z| at 0.01 Hz drops to 10⁷ Ω·cm², and the penetration of corrosive media triggers Zn dissolution. Expanded failure stage (≥5 cycles): Corrosion spots expand, the contents of Zn and Al decrease sharply, Fe and O are enriched, |Z| at 0.01 Hz reaches 10⁶ Ω·cm², the coating blisters and peels off, leading to complete failure. This study provides a theoretical basis for optimizing protection strategies in industrial marine environments.

为研究海洋工业环境下钢网支架环氧锌铝复合涂层的老化失效机理，以渤海湾曹菲甸港区“高Cl - + 高浓度工业酸性气体+ 干湿交替循环”的腐蚀条件为试验背景。采用盐雾/干湿交替循环试验结合室外暴露试验。通过厚度测量、附着力测试、电化学阻抗谱（EIS）、三维激光共聚焦显微镜、扫描电子显微镜（SEM）和能量色散光谱（EDS）分析涂层性能和形态演变。结果表明：初始保护阶段（循环0-3）：涂层保持致密光滑，颜色变化最小，厚度逐渐增加，附着力高。EIS结果显示，在0.01 Hz下，|Z|约为10⁸-10⁹Ω·cm²，显示出显著的物理屏障功能。局部失效阶段（4个循环）：涂层表面出现局部锈斑，厚度增长加速，附着力突然下降，0.01 Hz下|Z|下降到10⁷Ω·cm²，腐蚀介质的渗透引发Zn溶解。扩展失效阶段（≥5次循环）：腐蚀斑扩大，Zn和Al含量急剧下降，Fe和O富集，0.01 Hz下|Z|达到10⁶Ω·cm²，涂层起泡脱落，导致完全失效。本研究为海洋工业环境下的保护策略优化提供了理论依据。

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引用次数: 0

Laser-cladded hBN/Ni-based composite coatings for enhanced wear and corrosion resistance of HT250 cast iron 激光熔覆hBN/ ni基复合涂层增强HT250铸铁的耐磨损和耐腐蚀性能

IF 2.4 4区化学 Q4 ELECTROCHEMISTRY

International Journal of Electrochemical Science

Pub Date : 2026-03-01 Epub Date: 2026-01-20 DOI: 10.1016/j.ijoes.2026.101302

Lunxiang Li , Xiaojun Xue , Haitao Qu , Feng Liu , Liqian Liu , Xiaoyong Chen , Ruize Xu

HT250 cast iron is widely used for its excellent castability and cost-effectiveness, but its corrosion and wear resistance are insufficient. This study fabricated Ni-based composite coatings (Ni625 +Ni50 +hBN) on HT250 via laser cladding and systematically investigated the effects of laser power (1100 W, 1300 W, 1500 W) on the coating's microstructure, wear resistance, and corrosion resistance. XRD analysis showed the coating matrix is γ-Ni, with borides (Ni₂B), carbides (Cr₂₃C₆), and undecomposed hBN. SEM and EDS revealed that at 1300 W, hBN decomposes appropriately, forming a dispersion-strengthened structure with moderately sized hard phases. Mechanically, the 1300 W sample exhibited the highest microhardness (552.16 HV), lowest friction coefficient, and minimal wear loss. Electrochemical tests confirmed the 1300 W coating has optimal pitting corrosion resistance, with the highest breakdown potential, most noble repassivation potential, and significantly higher charge transfer resistance than other samples. Thus, 1300 W is the optimal laser power, achieving synergistic optimization of hard phase size, distribution, and corrosion resistance.

HT250铸铁因其优良的浇注性和成本效益而被广泛使用，但其耐腐蚀和耐磨性不足。采用激光熔覆的方法在HT250上制备了Ni625 +Ni50 +hBN复合镀层，系统研究了激光功率（1100 W、1300 W、1500 W）对镀层显微组织、耐磨性和耐腐蚀性的影响。XRD分析表明，涂层基体为γ-Ni，含硼化物（Ni₂B）、碳化物（Cr₂₃C₆）和未分解的hBN。SEM和EDS分析表明，在1300 W时，hBN适当分解，形成具有中等大小硬相的分散强化结构。机械性能方面，1300 W样品具有最高的显微硬度（552.16 HV）、最低的摩擦系数和最小的磨损损失。电化学试验证实，1300 W涂层具有最佳的抗点蚀性能，击穿电位最高，再钝化电位最高，电荷转移电阻明显高于其他样品。因此，1300 W为最优激光功率，实现了硬相尺寸、分布和耐腐蚀性的协同优化。

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引用次数: 0

ZrB2-reinforced electroless Ni-W-P composite coating with enhanced corrosion and wear resistance in 3.5 wt% NaCl solution zrb2增强化学镀Ni-W-P复合涂层在3.5 wt% NaCl溶液中的耐蚀耐磨性能增强

IF 2.4 4区化学 Q4 ELECTROCHEMISTRY

International Journal of Electrochemical Science

Pub Date : 2026-03-01 Epub Date: 2026-01-13 DOI: 10.1016/j.ijoes.2026.101293

Hongjie Li , Hongfa Huang , Deqiang Cai , Jie Xiao , Xi Yuan , Wenxu Zhu , Liangchen Lv

In this paper, various concentrations ZrB₂ nanoparticles were applied in the Ni-W-P bath system, and a series of Ni-W-P composite coatings were fabricated via composite chemical deposition. The phase composition, microstructure, elemental distribution, and chemical states of the different coatings were systematically characterized using XRD, SEM, EDS, and XPS, and the results of the tests indicated that Ni-W-P/ZrB₂ composite coatings were prepared successfully. The corrosion resistance, wear resistance and hardness of the coatings were investigated through electrochemical corrosion tests, friction tests and hardness tests. Electrochemical tests revealed that the incorporation of ZrB₂ particles significantly refines the coating’s microstructure. This structural optimization directly contributes to a remarkable enhancement in corrosion resistance and mechanical properties, as evidenced by detailed analysis of the electrochemical parameters. When ZrB₂ content reaches 1.25 g/L, Ni-W-P/ZrB₂ composite coatings exhibited the most excellent corrosion resistance (the lowest corrosion rate of 0.00499 mm/a). To further compare the mechanical properties between the pure alloy deposit and ZrB₂ strengthened composite deposit, the results of friction tests and hardness tests demonstrated that Ni-W-P/ZrB₂ composite deposit has better wear resistance.

本文将不同浓度的ZrB2纳米粒子应用于Ni-W-P镀液体系中，通过复合化学沉积法制备了一系列Ni-W-P复合镀层。采用XRD、SEM、EDS和XPS对不同涂层的相组成、微观结构、元素分布和化学状态进行了系统表征，测试结果表明成功制备了Ni-W-P/ZrB2复合涂层。通过电化学腐蚀试验、摩擦试验和硬度试验对镀层的耐蚀性、耐磨性和硬度进行了研究。电化学测试表明，ZrB2颗粒的加入显著改善了涂层的微观结构。详细的电化学参数分析证明，这种结构优化直接有助于显著提高耐腐蚀性和力学性能。当ZrB2含量达到1.25 g/L时，Ni-W-P/ZrB2复合镀层的耐蚀性能最优，腐蚀速率最低，为0.00499 mm/a。为了进一步比较纯合金镀层与ZrB2强化复合镀层的力学性能，摩擦试验和硬度试验结果表明，Ni-W-P/ZrB2复合镀层具有更好的耐磨性。

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引用次数: 0

Electrodeposited MnCu4 intermetallic compound as an efficient oxygen evolution electrocatalyst for water splitting 电沉积MnCu4金属间化合物作为高效析氧水裂解电催化剂

IF 2.4 4区化学 Q4 ELECTROCHEMISTRY

International Journal of Electrochemical Science

Pub Date : 2026-03-01 Epub Date: 2025-12-16 DOI: 10.1016/j.ijoes.2025.101272

J.C. Ballesteros , A. Gallegos-Carrillo , A. Cruz-López , S.I. Suárez-Vázquez , J. López-Tinoco , E. Valencia-Avilés

In this work it is reported the synthesis by electrodeposition of CuZn₄ from alkaline solution containing citrates at pH 10. The electrodes obtained on FTO were characterized by SEM, and XRD, and these results indicate that an intermetallic compound has been obtained. The electrocatalyst was tested for its application in OER in alkaline conditions and these results showed that MnCu₄ is an effective electrocatalyst for OER and of great interest in green hydrogen production. The overpotential obtained at 10 mA cm⁻² was 320 mV for OER. This study reveals a correlation between chemical composition and morphology of electrocatalyst, also the influence of work function value of MnCu₄ during the oxidation process.

本文报道了在pH为10的柠檬酸盐碱性溶液中电沉积CuZn4的方法。用SEM和XRD对FTO电极进行了表征，结果表明得到了金属间化合物。对该电催化剂在碱性条件下的OER应用进行了测试，结果表明MnCu4是一种有效的OER电催化剂，对绿色制氢具有重要意义。在10 mA cm−2处得到的过电位为320 mV。本研究揭示了电催化剂的化学组成与形貌之间的相关性，以及氧化过程中MnCu4的功函数值的影响。

引用次数: 0

Expired omeprazole as an effective corrosion inhibitor for copper in nitric acid 过期奥美拉唑对硝酸中铜的有效缓蚀剂

IF 2.4 4区化学 Q4 ELECTROCHEMISTRY

International Journal of Electrochemical Science

Pub Date : 2026-03-01 Epub Date: 2026-01-23 DOI: 10.1016/j.ijoes.2026.101303

Azhar Farooq , Enas H. Ali , Zainab W. Ahmed , Anees A. Khadom , Khalida F. Al-azawi

Researchers have investigated the effectiveness of an expired pharmaceutical drug, omeprazole, as a corrosion inhibitor for copper in 0.5 M nitric acid using mass-loss measurements conducted at different temperatures. The results demonstrated that the tested drug significantly reduced the corrosion rate of the copper alloy in the acidic medium. An inhibition efficiency of 97.7 % was achieved when 900 ppm of expired omeprazole was applied to the copper surface. Thermodynamic analyses were performed to determine the activation and adsorption parameters. The findings indicate that temperature and inhibitor concentration are the key factors influencing the corrosion behavior. The calculated Gibbs free energy of adsorption suggests that the inhibitor molecules adhere to the copper surface predominantly through physical adsorption. Furthermore, the adsorption process was found to follow the Langmuir isotherm, confirming that the pharmaceutical molecules naturally and spontaneously adsorb onto the copper surface. The research novelty lies in the application of an expired drug as a highly effective corrosion inhibitor under aggressive nitric acid environments. This offered cost-effective, ecofriendly, and alternative to conventional corrosion inhibitors.

研究人员利用在不同温度下进行的质量损失测量，研究了一种过期药物奥美拉唑作为0.5 M硝酸中铜的缓蚀剂的有效性。结果表明，所测药物能显著降低铜合金在酸性介质中的腐蚀速率。用900 ppm的过期奥美拉唑对铜表面进行缓蚀，缓蚀率为97.7 %。热力学分析确定了活化和吸附参数。结果表明，温度和缓蚀剂浓度是影响腐蚀行为的关键因素。计算的吸附吉布斯自由能表明，抑制剂分子主要通过物理吸附在铜表面。此外，发现吸附过程遵循Langmuir等温线，证实了药物分子自然自发地吸附在铜表面。该研究的新颖之处在于将一种过期药物应用于腐蚀性硝酸环境下的高效缓蚀剂。这为传统的缓蚀剂提供了经济、环保的替代方案。

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引用次数: 0

Preparation of phthalocyanine-ligand-based MOF materials for the hydrogen evolution reaction 酞菁配体基MOF材料的制备及其析氢反应

IF 2.4 4区化学 Q4 ELECTROCHEMISTRY

International Journal of Electrochemical Science

Pub Date : 2026-03-01 Epub Date: 2026-01-13 DOI: 10.1016/j.ijoes.2026.101291

Mingming Shi, Guodong Tang, Shaogui Hua, Jichen Hu

As a clean energy carrier, hydrogen energy demands efficient and cost-effective electrocatalysts for the hydrogen evolution reaction (HER). Although traditional noble metal catalysts exhibit high performance, their scarcity and high cost limit practical applications. This study proposes a novel strategy of constructing non-precious metal MOF materials using phthalocyanine ligands to address these challenges. The core innovation lies in designing and synthesizing a cobalt-phthalocyanine-derived MOF composite (CoPc@rGO-MOF) using a hot-solvent method. This method achieves the atomic dispersion of Co–N–C active sites within a hierarchical porous carbon matrix. The study optimizes the preparation process and investigates the structure–performance relationship for HER. The optimized CoPc@rGO-MOF demonstrated exceptional HER activity in 1 M KOH, with a low overpotential of only 98 mV at 10 mA cm⁻² and a small Tafel slope of 56 mV dec⁻¹. Moreover, it exhibited remarkable stability, with less than 5 % activity decay after 1000 cycles. Characterization revealed that the conjugated system of phthalocyanine ligands significantly enhanced charge transfer efficiency, while the hierarchical pore structure facilitated mass transport. This work provides a high-performance, non-precious metal HER catalyst and offers insights into the rational design of macrocyclic-ligand-based MOFs for energy conversion applications.

氢能作为一种清洁的能源载体，需要高效、经济的析氢反应电催化剂。传统贵金属催化剂虽然性能优异，但其稀缺性和高成本限制了其实际应用。本研究提出了一种利用酞菁配体构建非贵金属MOF材料的新策略来解决这些挑战。核心创新在于采用热溶剂法设计和合成钴-酞菁衍生的MOF复合材料（CoPc@rGO-MOF）。该方法实现了Co-N-C活性位点在分层多孔碳基体中的原子分散。本研究优化了HER的制备工艺，并考察了其结构性能关系。优化后的CoPc@rGO-MOF在1 M KOH中表现出优异的HER活性，在10 mA cm−2时过电位仅为98 mV， Tafel斜率很小，为56 mV dec−1。此外，它还表现出了显著的稳定性，经过1000次循环后活性衰减小于5 %。表征表明，酞菁配体的共轭体系显著提高了电荷转移效率，而分层孔结构促进了质量传输。这项工作提供了一种高性能的非贵金属HER催化剂，并为能量转换应用中基于大环配体的mof的合理设计提供了见解。

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引用次数: 0

Dual-site doping enhances the performance of NiMnFe-LDH catalysts for alkaline oxygen evolution 双位点掺杂提高了NiMnFe-LDH催化剂的碱性析氧性能

IF 2.4 4区化学 Q4 ELECTROCHEMISTRY

International Journal of Electrochemical Science

Pub Date : 2026-03-01 Epub Date: 2026-01-15 DOI: 10.1016/j.ijoes.2026.101282

Xinxuan Duan , Daoming Zhang , Jiacuo Xirao , Zhenyu Zhou , Yanbin Wang , Xi Xiao

Nickel-iron layered double hydroxides (NiFe-LDHs) are among the most promising non-precious metal catalysts for alkaline oxygen evolution reaction (OER), yet their performance still requires further improvement for practical applications. While introducing a third metal is a common strategy, most dopants occupy only a single valence site, limiting their ability to simultaneously optimize both Ni^2 + and Fe³⁺ centers in the LDH lattice. This work exploits the unique dual-valent character of manganese (Mn²⁺/Mn³⁺) to achieve simultaneous substitution at both Ni²⁺ and Fe³⁺ sites, a novel approach confirmed by XPS analysis. The resulting NiMnFe-LDHs catalyst exhibits exceptional OER activity (278 mV @10 mA·cm⁻²) and 200-hour stability at industrial current densities (400 mA·cm⁻²). In-situ Raman spectroscopy reveals that Mn doping facilitates the LDH-to-NiFeOOH transformation during OER, while XPS demonstrate the Mn²⁺/Mn³⁺-induced electron redistribution enhances both charge transfer and intermediate adsorption. This valence-mediated dual-site doping strategy establishes a new paradigm for designing high-performance LDH catalysts.

镍铁层状双氢氧化物（NiFe-LDHs）是碱析氧反应（OER）中最有前途的非贵金属催化剂之一，但其性能仍需进一步改进才能得到实际应用。虽然引入第三种金属是一种常见的策略，但大多数掺杂剂只占据一个价位，限制了它们同时优化LDH晶格中Ni2 +和Fe3+中心的能力。这项工作利用锰（Mn2+/Mn3+）独特的双价特性在Ni2+和Fe3+位点上同时实现取代，这是一种由XPS分析证实的新方法。所制得的NiMnFe-LDHs催化剂表现出优异的OER活性（278 mV @10 mA·cm−2）和在工业电流密度（400 mA·cm−2）下200小时的稳定性。原位拉曼光谱结果表明，Mn的掺杂促进了OER过程中ldh到nifeooh的转变，而XPS结果表明，Mn2+/Mn3+诱导的电子重分配促进了电荷转移和中间吸附。这种价介导的双位点掺杂策略为设计高性能LDH催化剂建立了新的范例。

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引用次数: 0

Electrochemical corrosion behavior of P110 tubing steel in CO2-saturated brine containing NO2 P110油管钢在含NO2的co2饱和盐水中的电化学腐蚀行为

IF 2.4 4区化学 Q4 ELECTROCHEMISTRY

International Journal of Electrochemical Science

Pub Date : 2026-03-01 Epub Date: 2026-01-13 DOI: 10.1016/j.ijoes.2026.101292

Zhen Yang , Guoxian Zhao , Ranran Liu

During CO₂ sequestration, injected gas contains various carbon source impurities. This work conducted in situ electrochemical testing on P110 tubing steel at 90°C under conditions where the carbon source impurity NO₂ content was 0, 100 ppm, and 900 ppm respectively. Impedance spectroscopy and dynamic potential scanning polarisation curve testing techniques were employed to characterise the microstructural information of different post-corrosion films, product film/substrate interfaces, and product film/corrosion medium interfaces. Results indicate that under pure CO₂ conditions, the capacitive arc radius is maximal, with a dense and highly protective corrosion product film. The charge transfer resistance (R_t) is 220.674 Ω·cm², and the anodic active area is suppressed, resulting in a low and uniform corrosion rate. The introduction of NO₂ significantly compromises the integrity and stability of the corrosion product film, leading to intensified localised corrosion. As NO₂ concentration increased from 0 ppm to 900 ppm, the electrode surface potential distribution became more dispersed, the anodic current peak intensified, and the number of active sites increased. Consequently, I_corr rose, E_corr shifted negatively, the capacitive arc radius decreased, and R_t dropped sharply. These changes significantly exacerbated both generalised and localised corrosion tendencies in the material.

在CO2固存过程中，注入气体中含有各种碳源杂质。本工作在90℃条件下对P110管钢进行了原位电化学测试，碳源杂质NO2含量分别为0、100 ppm和900 ppm。采用阻抗谱和动态电位扫描极化曲线测试技术表征了不同腐蚀后膜、产品膜/衬底界面和产品膜/腐蚀介质界面的微观结构信息。结果表明，在纯CO2条件下，电容弧半径最大，腐蚀产物膜致密，防护性强。电荷转移电阻（Rt）为220.674 Ω·cm2，阳极活性区受到抑制，腐蚀速率低且均匀。NO2的引入极大地损害了腐蚀产物膜的完整性和稳定性，导致局部腐蚀加剧。随着NO2浓度从0 ppm增加到900 ppm，电极表面电位分布更加分散，阳极电流峰值增强，活性位点数量增加。因此，Icorr升高，Ecorr负移，电容弧半径减小，Rt急剧下降。这些变化显著地加剧了材料的普遍和局部腐蚀趋势。

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引用次数: 0