Corrosion Science最新文献_第5页

Corrigendum to “Investigation of kinetics of ECM dendrite growth during corrosion in electronics” [Corros. Sci. 260 (2026) 113575] 电子设备腐蚀过程中ECM枝晶生长动力学研究的勘误表科学通报。260 (2026)113575]

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science

Pub Date : 2026-01-08 DOI: 10.1016/j.corsci.2026.113618

Jyothsna Murli Rao , Anish Rao Lakkaraju , Feng Li , Kapil Kumar Gupta , Rajan Ambat

引用次数: 0

How do system-specific conditions limit the validity of linear polarization resistance and potentiodynamic polarization in determining corrosion rates? 系统特定条件如何限制线性极化电阻和动电位极化在确定腐蚀速率方面的有效性？

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science

Pub Date : 2026-01-08 DOI: 10.1016/j.corsci.2026.113616

Marcel Roy B. Domalanta , Stephanie S. Mathew , Andrea Clarisse C. Corrales , Reymark D. Maalihan , Eugene B. Caldona

Linear polarization resistance (LPR) and potentiodynamic polarization (PDP) are two widely used electrochemical methods for corrosion rate determination, yet their reliability across bare, inhibitor-treated, and coated steels remains debated. Systematic comparisons against gravimetric benchmarks under varying scan rates are also lacking, limiting the confidence in their quantitative accuracy. Here, we show that the accuracy of both LPR and PDP is governed by the system type rather than the test protocol. For bare steel immersed in NaCl solution, both methods converged toward weight-loss (WL) values, with LPR-modified rates (∼6.1 mpy) closely matching WL (6.7–7.2 mpy). In inhibited steel (1 mM triazole in 1 M HCl), only LPR produced rates within the WL range (52–55 mpy), whereas PDP overestimated up to 150 mpy at higher scan rates and disrupted the inhibitor film, as confirmed by impedance loss. For polymer-coated steel, LPR yielded ultra-low rates (∼10⁻⁶ mpy) consistent with intact protection, while PDP curves were dominated by capacitive charging and lacked defensible Tafel regions. Statistical analysis (ANOVA, F = 59.05, p < 0.0001; R² adj = 0.79) confirmed system type as the dominant factor, with test type significant only through its interaction with system. These findings establish a practical, risk-based framework: LPR provided closer agreement with gravimetry for bare and inhibited steel under the tested conditions, while coated systems required barrier-focused diagnostics because PDP-derived kinetics were dominated by non-kinetic artifacts. By aligning test choice with system context, this study resolves longstanding inconsistencies in the corrosion literature and provides industries with quantitative basis for more reliable electrochemical monitoring.

线性极化电阻（LPR）和动电位极化（PDP）是测定腐蚀速率的两种广泛使用的电化学方法，但它们在裸钢、缓蚀剂处理钢和涂层钢中的可靠性仍存在争议。在不同扫描速率下，也缺乏与重力基准的系统比较，限制了对其定量准确性的信心。在这里，我们表明LPR和PDP的准确性都是由系统类型而不是测试协议控制的。对于浸泡在NaCl溶液中的裸钢，两种方法都趋近于失重（WL）值，lpr修饰的失重速率（~ 6.1 mpy）与WL （6.7-7.2 mpy）非常接近。在抑制钢中（1 mM三唑在1 M盐酸中），只有LPR产生的速率在WL范围内（52-55英里/小时），而PDP在更高的扫描速率下高估了高达150英里/小时，并破坏了抑制剂膜，阻抗损失证实了这一点。对于聚合物涂层钢，LPR产生了超低速率（~ 10−6 mpy），与完整的保护相一致，而PDP曲线以电容充电为主，缺乏可防御的Tafel区域。统计分析（方差分析，F = 59.05, p <； 0.0001;R2 adj = 0.79）证实系统类型为主导因素，检验类型仅通过与系统的交互作用才显著。这些发现建立了一个实用的、基于风险的框架：在测试条件下，LPR与裸钢和抑制钢的重力测量更接近一致，而涂层系统需要以障碍为重点的诊断，因为pdp衍生的动力学主要由非动力学伪像主导。通过将测试选择与系统环境结合起来，本研究解决了腐蚀文献中长期存在的不一致，并为工业提供了更可靠的电化学监测的定量基础。

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引用次数: 0

Investigating the anticorrosion properties of inhibitor-modified perfluorinated cerium-based metal-organic frameworks on the cathodic delamination of organically coated galvanised steel 研究了缓蚀剂改性全氟铈基金属有机骨架在有机镀锌钢阴极分层上的防腐性能

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science

Pub Date : 2026-01-07 DOI: 10.1016/j.corsci.2026.113607

Gareth Jones , Patrick Keil , Enrico Andreoli , Stephen Shearan , Geraint Williams

The corrosion protection and inhibitor delivery properties of the F4_MIL-140A(Ce) metal organic framework (Ce-MOF in short) in preventing corrosion-driven cathodic delamination when dispersed within polyvinylbutyral (PVB) coatings applied to hot-dip galvanized steel is investigated. The inhibition efficiency of F4_MIL-140A(Ce) is evaluated using time-lapse imaging and an in-situ scanning Kelvin probe (SKP) technique to quantify coating delamination rates. Delamination rates become progressively reduced upon addition of increasing quantities of F4_MIL-140A(Ce) to the PVB, which is attributed to the release of the organic linker into the underfilm electrolyte. The properties of F4_MIL-140A(Ce) as a means of storing and releasing potential inhibition species is investigated by adsorbing Benzotriazole, 8-hydroxyquinoline and 2-mercaptobenzothiazole on the surface of the Ce-MOF to produce a series of pigments which were subsequently dispersed within PVB. The incorporation of all inhibitors to F4_MIL-140A(Ce) significantly improves performance, with no delamination observed over a 24 h period when stored 2-mercaptobenzothiazole is present. Quantification of inhibitor release from the F4_MIL-140A(Ce) pigment is confirmed by UV–vis and SEM/EDX analysis.

研究了F4_MIL-140A（Ce）金属有机骨架（简称Ce- mof）分散在热镀锌钢用聚乙烯醇丁醛（PVB）涂层中的防腐性能和缓蚀剂输送性能。采用延时成像和原位扫描开尔文探针（SKP）技术对F4_MIL-140A（Ce）的抑制效率进行了评估，以量化涂层的分层率。在PVB中加入越来越多的F4_MIL-140A（Ce）后，分层率逐渐降低，这是由于有机连接物释放到膜下电解质中。通过吸附苯并三唑、8-羟基喹啉和2-巯基苯并噻唑在Ce- mof表面生成一系列颜料，并将其分散在PVB中，研究了F4_MIL-140A（Ce）作为潜在抑制物质的储存和释放特性。所有抑制剂与F4_MIL-140A（Ce）的结合显著提高了性能，当储存2-巯基苯并噻唑时，在24 h的时间内没有观察到分层。F4_MIL-140A（Ce）色素中抑制剂的释放量通过UV-vis和SEM/EDX分析得到证实。

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引用次数: 0

Unexpected low temperature crack propagation in nuclear post-shutdown water chemistry of Alloy 52 with potential effects of hydrogen 氢的潜在影响下52合金核后停堆水化学中的意外低温裂纹扩展

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science

Pub Date : 2026-01-06 DOI: 10.1016/j.corsci.2026.113604

Pedro A. Ferreirós , Ulla Ehrnstén , Yanling Ge , Björn Forssgren , Mimmi Bäck , Song Lu , Pål Efsing , Zaiqing Que

Constant-displacement bolt-loaded compact tension specimens of Nickel-based Alloy 52 were exposed to boiling water reactor environment for 12 years, followed by an additional 3 years in post-shutdown cold water conditions in a Swedish nuclear power plant test loop, under a stress intensity factor of 20 MPa√m. After outer surface decontamination and specimen opening, unexpected crack extensions of 3–4.5 mm were observed. The fracture surface and the cross-sectional deformation microstructure were examined by electron microscopies techniques down to the nanoscale. The oxide layer in the region exhibiting unexpected crack growth was notably thin, suggesting that it formed after exposure to elevated operating temperatures. The dominant fracture mode is transgranular, propagating along close-packed {111} planes. The grains contained heterogeneous microstructures with regions enriched in nanometer-sized Ti(N,C) and the zigzag crack paths did not traverse these regions strengthened areas. Extensive shear bands were present near the crack tips, indicating pronounced localized plasticity. Hydrogen reduces stacking fault energy, results in localized plasticity and enhances shear bands formation. Low temperature crack propagation with evident effects of hydrogen was considered as the potential cause of crack propagation in Alloy 52 in the absence of external dynamic loading under post-shutdown cold water chemistry.

镍基合金52的恒位移螺栓加载紧绷试样在沸水反应堆环境中暴露了12年，然后在瑞典核电站试验回路中在关闭后的冷水条件下额外暴露了3年，应力强度系数为20 MPa√m。经外表面净化和试样打开后，观察到3-4.5 mm的意外裂纹扩展。采用纳米级的电子显微镜技术对断口表面和截面变形组织进行了观察。在出现意外裂纹扩展的区域的氧化层非常薄，表明它是在暴露于较高的工作温度后形成的。主要的断裂模式是穿晶断裂，沿致密的{111}面扩展。晶粒具有非均匀的显微结构，富含纳米级Ti（N，C）的区域，锯齿形裂纹路径不会穿过这些强化区域。裂纹尖端附近存在广泛的剪切带，表明明显的局部塑性。氢降低了层错能，产生了局部塑性，促进了剪切带的形成。在停堆后冷水化学作用下，在没有外部动载荷的情况下，氢的低温裂纹扩展是52合金裂纹扩展的潜在原因。

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引用次数: 0

Effect of cold rolling on corrosion behavior of IN625 alloy in hydrofluoric acid solution 冷轧对IN625合金氢氟酸腐蚀行为的影响

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science

Pub Date : 2026-01-06 DOI: 10.1016/j.corsci.2026.113601

Rongrong Shang , Xiaoxuan Dong , Mengxia Chen , Yang Liu , Lu Liu , Jianwei Teng , Biaobiao Yang , Yunping Li

Corrosion behaviors of IN625 alloy after cold rolling to reduction rates of 20%, 50% and 80% were investigated by immersion in hydrofluoric acid (HF) solution. In contrast to the negligible influence on the anti-corrosive alloys IN600 and C276, significantly deteriorated corrosion resistance of alloy IN625 was observed after cold rolling. This can be partly ascribed to the extremely low stacking fault energy (SFE) of IN625 alloy, which is characterized by exceptionally high mean dislocation density and extremely high lattice distortions locally around the carbide, grain boundaries (GB), annealing twinning boundaries (ATB) and planar slipping bands (SB). The high-defect areas around the carbide, GBs, ATB and SB after cold rolling demonstrate enhanced anodic activity and consequently lower electrode potentials. The thermodynamic potential difference between defect-rich and defect-free regions drives the generation of microcurrents, accelerating the local corrosion process, and ultimately leading to a decreased overall corrosion resistance of alloy. This greatly lowered the passiveness of alloy by enhancing the dissolution of alloying elements and accelerated the internal penetration of F ions into alloy matrix through the high defect channels, carbide, GB, ATB and SB.

采用氢氟酸（HF）溶液浸泡的方法，研究了冷轧后IN625合金在还原率为20%、50%和80%时的腐蚀行为。冷轧对耐腐蚀合金IN600和C276的影响可以忽略，而冷轧后IN625的耐腐蚀性能明显下降。这可以部分归因于IN625合金极低的层错能（SFE），其特征是异常高的平均位错密度和在碳化物、晶界（GB）、退火孪晶界（ATB）和平面滑移带（SB）周围的极高的局部晶格畸变。冷轧后碳化物、GBs、ATB和SB周围的高缺陷区域阳极活性增强，电极电位降低。富缺陷区和无缺陷区之间的热力学电位差驱动微电流的产生，加速了局部腐蚀过程，最终导致合金的整体耐蚀性下降。这通过增强合金元素的溶解，大大降低了合金的钝化性，加速了F离子通过高缺陷通道、碳化物、GB、ATB和SB向合金基体内部渗透。

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引用次数: 0

Ti-induced amorphous/nanocrystalline oxide films enabling high-potential SCC immunity to zirconium alloys in nitric acid ti诱导的非晶/纳米晶氧化膜使SCC在硝酸中对锆合金具有高电位免疫

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science

Pub Date : 2026-01-06 DOI: 10.1016/j.corsci.2026.113606

Naizhi Liu , Chengze Liu , Jinping Wu , Jianping Xu , Yi Liu , Zhonglin Shen , Lai-Chang Zhang , Yusheng Zhang

To mitigate stress corrosion cracking (SCC) and improve the breakdown resistance of Zr alloys in high-temperature nitric acid, we developed a series of Zr-Ti alloys with varying Ti contents. Their mechanical and electrochemical properties were evaluated by slow strain rate tensile (SSRT) tests in 6 M HNO₃ at 95 °C under both open-circuit potential (OCP) and a constant potential of 1.5 V conditions. While pure Zr exhibited brittle fracture and significant oxide thickening (∼96 μm) with severe cracking at 1.5 V, Zr702L (Zr-6Ti) maintained superior strength and ductility, forming only a nanoscale, crack-free oxide film. We found that the addition of Ti facilitated the formation of a dense hybrid oxide film composed of nanocrystalline ZrO₂/TiO₂ and an amorphous phase. Compared with other works, this composite structure ensured the preservation of the alloy's mechanical integrity while concurrently inhibited crack initiation and blocked the invasion of corrosive species. Our results highlight the critical role of Ti in stabilizing the oxide film and enhancing the SCC resistance of Zr alloys under aggressive electrochemical conditions.

为了减轻Zr合金在高温硝酸中的应力腐蚀开裂（SCC），提高其抗击穿性能，我们研制了一系列不同Ti含量的Zr-Ti合金。在开路电位（OCP）和恒电位1.5 V条件下，在95°C 6 M HNO3中进行慢应变速率拉伸（SSRT）试验，评价了它们的力学和电化学性能。纯Zr表现为脆性断裂和明显的氧化增厚（~ 96 μm），在1.5 V时严重开裂，而Zr702L （Zr- 6ti）保持了优异的强度和延展性，仅形成纳米级无裂纹的氧化膜。我们发现，Ti的加入有利于形成由纳米晶ZrO2/TiO2和非晶相组成的致密杂化氧化膜。与其他作品相比，这种复合结构既保证了合金的力学完整性，又抑制了裂纹的萌生，阻断了腐蚀物质的侵入。我们的研究结果强调了Ti在稳定氧化膜和增强Zr合金在侵略性电化学条件下的抗SCC能力方面的关键作用。

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引用次数: 0

Unveiling the dual corrosion mechanisms of 15–15Ti austenitic steel in lead-bismuth eutectic: The pivotal role of manganese 揭示15-15Ti奥氏体钢在铅铋共晶中的双重腐蚀机制：锰的关键作用

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science

Pub Date : 2026-01-06 DOI: 10.1016/j.corsci.2026.113600

Jun Wu , Ke Zhao , Da Wang , Sirui Liu , Xianfeng Ma

Lead-bismuth eutectic (LBE) is a promising coolant for advanced nuclear systems, but its corrosion compatibility with structural steels remains a critical challenge. This work reports an unusual corrosion behavior of 15–15Ti austenitic stainless steel in oxygen-controlled (5 ×10⁻⁷ wt%) LBE at 550 ℃. Through a combined microscale and nanoscale characterization approach (SEM, EDS, EBSD, TEM), two distinct oxidation morphologies are identified. The first is a conventional triplex structure with an outer magnetite layer, an inner Fe-Cr spinel, and a Ni-rich internal oxidation zone (IOZ). The second is an unusual structure, characterized by an outer magnetite layer, an epitaxially-grown Mn-Cr spinel layer sandwiched between two nanoscale Cr₂O₃ layers, atop a ferritization zone. The Mn-Cr spinel forms via a solid-state transformation from an initial Fe-Cr spinel, driven by Mn diffusion, which densifies the oxide and significantly retards its growth. However, this Mn-Cr spinel layer is susceptible to LBE penetration, leading to complex LBE decomposition and Cr₂₃C₆ precipitation within the ferrite layer. The ferritization process is shown to initiate via solid-state diffusion, forming a continuous layer, and progresses via a dissolution-reprecipitation mechanism, resulting in a fragmented morphology. This study provides novel insights into the critical role of minor alloying elements, particularly Mn, in steering corrosion pathways, offering essential guidance for designing corrosion-resistant steels for LBE service.

铅铋共晶（LBE）是一种很有前途的先进核系统冷却剂，但其与结构钢的腐蚀相容性仍然是一个关键的挑战。本文报道了15-15Ti奥氏体不锈钢在550℃的氧控（5 ×10−7 wt%） LBE中不寻常的腐蚀行为。通过微尺度和纳米尺度相结合的表征方法（SEM， EDS， EBSD， TEM），鉴定出两种不同的氧化形态。第一种是传统的三相结构，外层是磁铁矿层，内部是铁铬尖晶石，内部是富镍氧化带（IOZ）。第二种是一种不寻常的结构，其特征是外层有一个磁铁矿层，一个外延生长的Mn-Cr尖晶石层夹在两个纳米级Cr2O3层之间，位于铁素化带的顶部。Mn- cr尖晶石是由初始Fe-Cr尖晶石在Mn扩散的驱动下由固态转变形成的，Mn- cr尖晶石使氧化物致密化并显著延缓其生长。然而，Mn-Cr尖晶石层易受LBE渗透，导致铁素体层内LBE的复杂分解和Cr23C6的析出。铁素化过程通过固态扩散开始，形成连续层，并通过溶解-再沉淀机制进行，导致碎片化形貌。该研究为次要合金元素（特别是Mn）在转向腐蚀途径中的关键作用提供了新的见解，为设计LBE服务的耐腐蚀钢提供了重要指导。

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引用次数: 0

Microstructural characteristics and oxidation behaviors of heat-resistant Cu-Ni-Al alloys with co-addition of Cr and Zr Cr和Zr共加入Cu-Ni-Al耐热合金的显微组织特征及氧化行为

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science

Pub Date : 2026-01-06 DOI: 10.1016/j.corsci.2026.113603

Zhumin Li , Yuan Li , Jiansheng Li , Yusheng Li , Yuehong Zheng , Wei Jiang , Ao Meng , Qingzhong Mao , Yonghao Zhao

The development of advanced copper alloys with excellent oxidation resistance and high thermal stability is crucial for the application of key hot-end components. Herein, we systematically investigate the effects of the co-addition of Cr and Zr on the microstructure and oxidation behavior of coherent γ' phase-strengthened Cu-Ni-Al alloys. Through comprehensive microstructural characterization, thermodynamic calculations, and first-principles calculation, their microstructural evolution and oxidation resistance mechanisms were elucidated. The results indicate that the strong negative mixing enthalpies of Cr-Ni (ΔH_Ni-Cr = −7 kJ/mol) and Zr-Ni (ΔH_Ni-Zr = −49 kJ/mol) facilitate the complete solid solution of Cr and Zr in the γ and γ′ phases of the Cu_49.66 alloy. With increasing Cu content, the volume fraction and size of the γ′ phase decreases, and excess Cr and Zr precipitate predominantly as BCC-Cr and Ni₅Zr phases. When the Cu content is ≤ 86.66 at%, the alloys exhibit outstanding oxidation resistance, with mass gains of only 0.22–3.54 mg/cm² at 850 ℃. This behavior is attributed to: (1) Cr promotes the formation of Al₂O₃ layer and healing its micro-defects via rapid diffusion, suppressing cation/anion interdiffusion; (2) Zr possesses a pronounced tendency for grain boundary segregation, effectively impeding oxygen diffusion along grain boundaries. (3) BCC-Cr and Ni₅Zr phases exhibiting high oxygen adsorption energies (−8.79 eV and −7.62 eV, respectively), which enhance surface oxygen adsorption and promote the formation of a protective oxide scale. This study provides both theoretical and experimental foundations for the composition design and oxidation protection of high-temperature-resistant copper alloys.

开发具有优异抗氧化性和高热稳定性的高级铜合金，对于关键热端部件的应用至关重要。本文系统地研究了Cr和Zr共添加对共格γ′相强化Cu-Ni-Al合金显微组织和氧化行为的影响。通过综合的微观结构表征、热力学计算和第一性原理计算，阐明了它们的微观结构演变和抗氧化机理。结果表明：Cr- ni （ΔHNi-Cr =−7 kJ/mol）和Zr- ni （ΔHNi-Zr =−49 kJ/mol）较强的负混合焓有利于Cr和Zr在Cu49.66合金的γ和γ′相中完全固溶；随着Cu含量的增加，γ′相的体积分数和尺寸减小，过量的Cr和Zr主要以BCC-Cr和Ni5Zr相析出。当Cu含量≤ 86.66 at%时，合金表现出优异的抗氧化性能，850℃下的质量增益仅为0.22 ~ 3.54 mg/cm2。这是由于：(1)Cr通过快速扩散促进了Al2O3层的形成并修复其微缺陷，抑制了正离子/阴离子的相互扩散；(2) Zr具有明显的晶界偏析倾向，有效地阻碍了氧沿晶界扩散。(3) BCC-Cr和Ni5Zr相表现出较高的氧吸附能（分别为- 8.79 eV和- 7.62 eV），增强了表面氧吸附，促进了保护氧化层的形成。本研究为耐高温铜合金的成分设计和抗氧化提供了理论和实验依据。

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引用次数: 0

Hydrogen embrittlement in low-Ni austenitic stainless steel: Microstructure-driven mechanisms revealed by experimental and simulation study 低镍奥氏体不锈钢的氢脆：微观组织驱动机制的实验和模拟研究

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science

Pub Date : 2026-01-05 DOI: 10.1016/j.corsci.2026.113598

Yeonggeun Cho , Hyung-Jun Cho , Jinheung Park , Sung-Joon Kim

The present study investigated the microstructure-driven mechanisms governing hydrogen embrittlement (HE) in low-Ni austenitic stainless steels, by integrating multi-scale experimental analysis with crystal plasticity and hydrogen transport simulations. The results revealed that while α’ martensite increases susceptibility to HE, grain-size heterogeneity and intragranular nanoscale carbides play critical roles in local H distribution and H-induced cracking. Grain refinement enhanced strength and decreased H uptake; however, simulations demonstrated that inevitable grain-size deviations induced stress heterogeneity between fine and coarse grains. H segregation along high-angle grain boundaries, coupled with stress heterogeneity, promoted localized H-induced cracking in highly deformed regions to deteriorate HE resistance. Increased carbon content for strengthening facilitated the precipitation of nanoscale Cr₂₃C₆ carbides within austenite grains, but these carbides increased the uptake of diffusible H. Their interfaces acted as preferential crack initiation sites in central regions, and the cracks propagated toward the surface during deformation. Surface H-induced cracks generated additional stress concentrations in the interior, which synergized negatively with central cracking to accelerate premature fracture of the steel.

本研究采用多尺度实验分析、晶体塑性和氢输运模拟相结合的方法，研究了低镍奥氏体不锈钢氢脆（HE）的微观组织驱动机制。结果表明，在α′马氏体增加HE敏感性的同时，晶粒尺寸不均一性和粒内纳米碳化物对H的局部分布和H致开裂起关键作用。晶粒细化提高了强度，降低了吸氢量；然而，模拟表明，不可避免的晶粒尺寸偏差导致了细晶粒和粗晶粒之间的应力不均匀性。沿高角度晶界的H偏析，加上应力不均匀性，促进了高变形区域的局部H致开裂，从而降低了HE抗力。碳含量的增加促进了奥氏体晶粒内纳米级Cr23C6碳化物的析出，但这些碳化物增加了扩散h的吸收，它们的界面在中心区域成为首选的裂纹萌生点，并且在变形过程中裂纹向表面扩展。表面h裂纹在内部产生额外的应力集中，与中心裂纹负协同作用，加速钢的过早断裂。

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引用次数: 0

Chemically complex ordered alloy enables electrochemically stable passivation for superior corrosion resistance 化学复杂有序合金使电化学稳定钝化，具有优异的耐腐蚀性

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science

Pub Date : 2026-01-05 DOI: 10.1016/j.corsci.2026.113597

J.Y. Zhang , Y.H. Zhou , T.H. Chou , J.H. Luan , H. Luo , Y.L. Zhao , T. Yang

The nanoscale passive film on the alloy surface critically governs the corrosion resistance of alloys. An ideal passive film is expected to act as a protective barrier layer to effectively protect the alloy matrix by impeding the charge transfer reactions and diffusion of corrosive ions. Most traditional intermetallic alloys, however, face serious challenges when it comes to passivation or forming stable passive films in harsh/reactive environments. This is primarily due to limited elemental choices and single-atom occupancy tendencies, resulting in unsatisfactory aqueous corrosion resistance. Here, we develop a novel chemically complex intermetallic alloy (CCIMA) with a near-single-phase L1₂ structure, where tailored sublattice occupancy enables Co and Ni to occupy face-center sites and Al, V, Ta, and Ti to occupy corner sites. Electrochemical tests in 3.5 wt% NaCl solution demonstrate the superior comprehensive corrosion performance of CCIMA compared to most traditional intermetallic alloys, as evidenced by the higher pitting potential (E_pit), higher corrosion potential (E_corr), and lower corrosion current density (i_corr). This performance stems from the rapid formation of a ∼3.7 nm thick, non-stoichiometric amorphous passive film comprising multiple stable oxides (primarily Al₂O₃, TiO₂, Ta₂O₅, Co₃O₄, and minor V₂O₅, Co(OH)₂, Ni(OH)₂). Our work provides in-depth insights into the targeted design of passive films with desired properties towards better corrosion resistance and opens a new pathway for the optimization of damage-tolerant intermetallic alloys.

合金表面的纳米级钝化膜对合金的耐蚀性起着至关重要的作用。理想的钝化膜可以作为一种保护屏障层，通过阻止电荷转移反应和腐蚀离子的扩散，有效地保护合金基体。然而，大多数传统的金属间合金在恶劣/反应环境下的钝化或形成稳定的钝化膜时面临着严峻的挑战。这主要是由于有限的元素选择和单原子占用倾向，导致不满意的耐水性腐蚀。在这里，我们开发了一种具有近单相L12结构的新型化学复杂金属间合金（CCIMA），其中定制的亚晶格占用使Co和Ni占据面中心位置，Al， V， Ta和Ti占据角位置。在3.5 wt% NaCl溶液中的电化学测试表明，与大多数传统金属间合金相比，CCIMA具有更高的点蚀电位（Epit）、更高的腐蚀电位（Ecorr）和更低的腐蚀电流密度（icorr），具有更好的综合腐蚀性能。这种性能源于快速形成的~ 3.7 nm厚的非化学计量非晶钝化膜，包含多种稳定的氧化物(主要是Al2O3， TiO2, Ta2O5, Co3O4，以及少量的V2O5， Co（OH)2, Ni(OH)2）。我们的工作为钝化膜的目标设计提供了深入的见解，这些钝化膜具有更好的耐腐蚀性，并为优化耐损伤金属间合金开辟了新的途径。

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引用次数: 0