Corrosion Science最新文献

英文中文

Liquid lead-bismuth eutectic corrosion of additively manufactured 316L stainless steels 添加剂制造的液体铅铋共晶腐蚀 316L不锈钢

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

Corrosion Science

Pub Date : 2025-12-15 DOI: 10.1016/j.corsci.2025.113559

Yingxi Li , Yuji Huang , Fanqiang Meng , Miao Song

Dissolution corrosion of structural materials in liquid lead–bismuth eutectic (LBE) remains challenging for advanced reactors. It is governed by chemical composition and microstructure. Additive manufacturing creates columnar grains, dislocation cells, and segregation, yet their corrosion impact is largely unexplored. Here, additively manufactured (AM) 316L stainless steel (SS) with varied Ni, Cr, Mo, Si, and Ti were fabricated by laser powder bed fusion and tested in as-built and fully recrystallized conditions after 1000 h in LBE at 550℃. Higher Ni favored primary austenite solidification and drove Cr and Mo segregation to dislocation cell boundaries, accelerating penetration along cellular paths. By contrast, additions of Cr, Si, Ti, or Mo shifted solidification toward primary ferrite, suppressed cellular segregation, refined grains, and promoted annealing twins, thereby mitigating preferential penetration. After LBE corrosion, alloys with added Si or Cr formed a continuous Cr-rich oxide scale, reducing ingress, and Ti alloying produced a duplex oxide with a Ti-rich outer layer and a Cr-rich inner layer that further blocked transport. Conversely, Mo impaired passivation and hindered continuous Cr-rich oxide formation, enabling ingress along random high angle grain boundaries and melt pool boundaries, and producing the deepest penetration. Full recrystallization across all compositions homogenized grain structures, increased low-energy twin boundaries, and reduced penetration depth. These findings demonstrate that raising Si and Cr while limiting Ni and Mo improves corrosion resistance in LBE, and Ti provides additional benefits through duplex oxide formation and grain refinement. Our work explores the compositional and microstructural space of AM 316L to improve resistance to LBE-induced dissolution.

结构材料在液态铅铋共晶（LBE）中的溶解腐蚀一直是先进反应堆面临的挑战。它是由化学成分和微观结构决定的。增材制造会产生柱状晶粒、位错细胞和偏析，但它们对腐蚀的影响在很大程度上尚未被探索。本文采用激光粉末床熔融法制备了含有不同Ni、Cr、Mo、Si和Ti的增材制造（AM） 316L不锈钢（SS），并在550℃LBE中1000 h后进行了原位再结晶测试。较高的Ni有利于初生奥氏体凝固，促使Cr和Mo偏析到位错晶胞边界，加速沿晶胞路径的渗透。相比之下，Cr、Si、Ti或Mo的添加使凝固向初生铁素体转变，抑制了细胞偏析，细化了晶粒，促进了退火孪晶，从而减轻了优先渗透。在LBE腐蚀后，加入Si或Cr的合金形成了连续的富Cr氧化层，减少了进入，而Ti合金化产生了富Ti外层和富Cr内层的双相氧化物，进一步阻碍了运输。相反，Mo破坏了钝化，阻碍了富cr氧化物的连续形成，使其能够沿着随机的高角度晶界和熔池边界进入，并产生最深的穿透。所有成分的完全再结晶均质化了晶粒结构，增加了低能孪晶界，减小了穿透深度。这些发现表明，在限制Ni和Mo的同时提高Si和Cr可以提高LBE的耐腐蚀性，而Ti通过双氧化物的形成和晶粒细化提供了额外的好处。我们的工作是探索AM 316L的组成和微观结构空间，以提高对lbe诱导溶解的抵抗力。

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引用次数: 0

Chameleon skin-inspired smart coating with hierarchical self-warning/self-healing functions for sequential damage-to-corrosion protection 变色龙皮肤启发的智能涂层，具有分层自我警告/自我修复功能，可进行顺序损伤到腐蚀保护

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

Corrosion Science

Pub Date : 2025-12-15 DOI: 10.1016/j.corsci.2025.113561

Yixin Chen , Zhiqiang Gao , Qian Wang , Lifeng Hou , Yinghui Wei

A smart protective coating with hierarchical self-warning and self-healing functions was developed by incorporating polyurethane/poly-(urea formaldehyde) (PUF) microcapsules loaded with anthocyanin (Anth) into a semi-interpenetrating polymer network (semi-IPN). The semi-IPN consists of hydrogen-bonded polyurethane (PU) and rigid epoxy resin (EP) network. The released anthocyanin not only provides distinct chromatic responses but also adsorbs onto the Mg surface to form protective complexes, exhibiting an inhibition efficiency of 94 %. XPS analysis elucidates the interfacial corrosion inhibition mechanism. This “one-molecule, multi-function” strategy offers a simplified method for achieving hierarchical functions against coating damage and substrate corrosion, showing significant potential for smart coatings.

将装载花青素（Anth）的聚氨酯/聚脲醛（PUF）微胶囊掺入半互穿聚合物网络（semi-IPN）中，开发了一种具有分层自预警和自修复功能的智能防护涂层。半ipn由聚氨酯（PU）和刚性环氧树脂（EP）网络组成。释放的花青素不仅具有明显的颜色反应，而且还吸附在Mg表面形成保护复合物，其抑制效率为94% %。XPS分析阐明了界面缓蚀机理。这种“单分子、多功能”的策略提供了一种简化的方法来实现分层功能，防止涂层损伤和基材腐蚀，显示出智能涂层的巨大潜力。

引用次数: 0

Self-adaptive growth of fluorine-resistant coatings on magnesium alloy by in situ fluorine-induced phase reconstruction 原位氟诱导相重建法在镁合金上自适应生长耐氟涂层

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

Corrosion Science

Pub Date : 2025-12-15 DOI: 10.1016/j.corsci.2025.113560

Zishuo Ye , Shu Xiao , Hu Zhang , Luzhan Zhang , Qingdong Ruan , Chao Yang , Xiaoqin Zeng , Paul K. Chu

Stepwise plasma electrolytic fluorination (PEF) enhances the corrosion resistance of AZ91 magnesium (Mg) alloys in acidic fluoride environments by forming dense MgO/MgF₂ composite coatings. The thermodynamically favored MgF₂ formation and volume expansion seal surface defects and compensate for the weakness of oxide coatings. Molecular dynamics and density-functional theory calculations reveal that the more robust diffusion barriers, weak adsorption, and reduced electron transfer collectively inhibit fluorine corrosion. Additionally, strengthening of the interface-regulated corrosion product barrier alleviates internal stresses, prevents crack propagation, and preserves the structural integrity. The synergistic effects improve the coating durability and corrosion protection under aggressive acidic fluoride conditions.

逐步等离子体电解氟化（PEF）通过形成致密的MgO/MgF2复合涂层，提高AZ91镁合金在酸性氟化环境中的耐腐蚀性。热力学上有利于MgF2的形成和体积膨胀，密封表面缺陷，弥补氧化涂层的缺陷。分子动力学和密度泛函理论计算表明，更强大的扩散屏障，弱吸附和减少的电子转移共同抑制氟腐蚀。此外，界面调节腐蚀产物屏障的增强可以减轻内应力，防止裂纹扩展，并保持结构的完整性。协同作用提高了涂层在腐蚀性酸性氟条件下的耐久性和防腐蚀性能。

引用次数: 0

Temperature-dependent oxide scale structure and corrosion behavior in alumina-forming austenitic steel exposed to liquid lead-bismuth eutectic containing 10−6 wt.% oxygen 含氧10 - 6 wt.%铅铋共晶液中铝形成奥氏体钢的温度依赖氧化垢结构和腐蚀行为

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

Corrosion Science

Pub Date : 2025-12-14 DOI: 10.1016/j.corsci.2025.113558

Decang Zhang , Xiaoxin Zhang , Jun Zhang , Hao Ren , Yingxue Chen , Feifei Zhang , Qingzhi Yan

Alumina-forming austenitic (AFA) steel shows promise due to its enhanced corrosion resistance. However, the effect of temperature on its corrosion behavior in lead-bismuth eutectic (LBE) remains poorly understood. In this study, AFA steel was exposed to LBE 10⁻⁶ wt% oxygen at 550, 600, and 650°C for 1700 h, and the detailed structure of the oxide scales was revealed by high-resolution characterization. At 550°C, a three-layer magnetite/Fe-Cr spinel/alumina scale was formed. As the temperature increased to 600°C, a chromia/alumina scale was developed due to Al being supplied by NiAl dissociation. At a further increased temperature of 650°C, the oxide scale became non-protective, thus LBE penetrated through the oxide scale into the underlying steel, causing the corrosion mode to shift from oxidation to discontinuous dissolution.

成铝奥氏体（AFA）钢因其增强的耐腐蚀性而具有广阔的应用前景。然而，温度对其在铅铋共晶（LBE）中的腐蚀行为的影响尚不清楚。在这项研究中，AFA钢在550、600和650°C、1700 h下暴露于LBE 10 - 6 wt%的氧气中，通过高分辨率表征揭示了氧化鳞片的详细结构。在550℃下，形成磁铁矿/Fe-Cr尖晶石/氧化铝三层鳞片。当温度升高到600℃时，由于NiAl解离提供Al，形成了铬/氧化铝垢。当温度进一步升高到650℃时，氧化皮不再具有保护作用，LBE通过氧化皮渗透到下层钢中，使腐蚀模式由氧化转变为不连续溶解。

引用次数: 0

Machine learning-guided optimization of oxidation resistance in NbTiZr-containing refractory high-entropy alloys 基于机器学习的含nbtizr难熔高熵合金抗氧化性能优化

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

Corrosion Science

Pub Date : 2025-12-14 DOI: 10.1016/j.corsci.2025.113557

Ziqiang Dong , Xiaodong Yu , Qiliang Huang , Lei Dai , Zhengkun Mou , Chao Zhou , Hongyu Zhou , Yinsheng He , Wenyue Zheng , Lei Jin

The NbTiZr-containing refractory high-entropy alloys (RHEAs) are considered as promising materials for ultra-high-temperature engineering applications. However, their development is limited by inadequate oxidation resistance at elevated temperatures. In this work, the oxidation behavior of NbTiZr-containing RHEAs was investigated using a Machine Learning (ML) integrated approach. Among the classic ML algorithms evaluated, XGBoost demonstrates the highest prediction accuracy (R² = 0.91). The interpretability of the ML model was enhanced using the SHAP (Shapley Additive Explanations) algorithm, which identified V, Mo, Nb, Zr, Al, Cr, Ta, Ti, Si, Hf, and W—ranked in descending order of influence—as the key elements governing the oxidation behavior of RHEAs. The results show that Cr, Si, Al, Ta, and Mo are the beneficial elements that improve the oxidation resistance, while Ti, Nb, V, and Zr impair it. Threshold content levels are observed for the different elements, beyond which the alloying effect becomes significant. The ML calculations revealed that excessive amounts of Ti or Zr impair the oxidation resistance of NbTiZr-containing RHEAs more evidently than that of Nb. Among the beneficial elements (Al, Cr, Si), Al shows the strongest positive effects. Al and Cr also demonstrate a strong synergistic effect in improving the oxidation resistance. Based on the ML results, the RHEAs with the composition of CrNbTiZrAl_0.2Si_x (x = 0, 0.2 and 0.5) were designed, and their oxidation behavior in high-temperature air was comprehensively investigated.

含nbtizr的难熔高熵合金（RHEAs）是一种极具应用前景的超高温材料。然而，它们的发展受到高温下抗氧化能力不足的限制。在这项工作中，使用机器学习（ML）集成方法研究了含nbtizr的RHEAs的氧化行为。在评估的经典ML算法中，XGBoost的预测精度最高（R2 = 0.91）。使用Shapley加性解释（Shapley Additive Explanations）算法增强了ML模型的可解释性，该算法确定V、Mo、Nb、Zr、Al、Cr、Ta、Ti、Si、Hf和w是控制RHEAs氧化行为的关键元素，影响程度按降序排列。结果表明，Cr、Si、Al、Ta和Mo是提高合金抗氧化性能的有利元素，而Ti、Nb、V和Zr则对合金的抗氧化性能不利。观察了不同元素的阈值含量水平，超过该阈值，合金效应就变得显著。ML计算表明，过量的Ti或Zr对含nbtizr的RHEAs的抗氧化性的损害比Nb更明显。在有益元素（Al, Cr, Si）中，Al的积极作用最强。Al和Cr在提高抗氧化性能方面也表现出较强的协同效应。在此基础上，设计了以crnbtizral0.2 - six （x = 0,0.2和 0.5）为组成的RHEAs，并对其在高温空气中的氧化行为进行了全面研究。

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引用次数: 0

Iron dissolution kinetics of API 5CT C110 carbon steel in acidic environments: A numerical modelling approach API 5CT C110碳钢在酸性环境中的铁溶解动力学：数值模拟方法

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

Corrosion Science

Pub Date : 2025-12-13 DOI: 10.1016/j.corsci.2025.113554

P. Weerakkody, A. Al Helal, K. Wang

This study investigates the reaction kinetics of API 5CT C110 carbon steel dissolution in different acidic environments using electrochemical techniques. An optimal analysis time was determined, outside the active material dissolution and transient regions. Electrochemical impedance spectroscopy (EIS) at open-circuit potential revealed two distinct reaction time steps in the different acidic environments. The effects of anion concentrations on the reaction mechanisms were determined under accelerated anodic conditions. The findings demonstrate that reaction rates are influenced by the interdependence between surface potential and solution species. An alternative numerical modelling approach was developed for EIS data analysis, achieving an accuracy of 98.8 % for a three-time-step model, representing a previously unreported mechanistic step. Furthermore, the model accounts for the reactant concentrations that influence the reaction rates. This method improves accuracy, simplifies parameter optimisation, and enhances interpretability compared to conventional equivalent circuit fitting.

采用电化学技术研究了API 5CT C110碳钢在不同酸性环境下的溶解反应动力学。确定了在活性物质溶出和瞬态区域外的最佳分析时间。开路电位下的电化学阻抗谱（EIS）揭示了不同酸性环境下不同的反应时间步长。在加速阳极条件下，研究了阴离子浓度对反应机理的影响。结果表明，反应速率受表面电位和溶液种类的相互依赖关系的影响。为EIS数据分析开发了另一种数值模拟方法，对于三时间步模型，代表了以前未报道的机制步骤，其精度达到98.8 %。此外，该模型考虑了影响反应速率的反应物浓度。与传统等效电路拟合相比，该方法提高了精度，简化了参数优化，并增强了可解释性。

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引用次数: 0

Elucidating the minor Si-driven internal barrier mechanism for enhanced oxidation resistance of carbon-free high-speed steels 阐明了少量硅驱动的增强无碳高速钢抗氧化性的内势垒机制

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

Corrosion Science

Pub Date : 2025-12-13 DOI: 10.1016/j.corsci.2025.113553

Fengwei Xie , Ziren Yuan , Luli Feng , Shuaipeng Chen , Ziyi Xu , Yuehui He , Xiyue Kang

Minor silicon addition to carbon-free Fe-Co-Mo high-speed steels markedly enhances the oxidation resistance, quantitatively demonstrated by an increase in the apparent oxidation activation energy from 161.1 kJ/mol (Si-free) to 212.5 kJ/mol (0.5 wt% Si). This enhancement is rooted in a novel mechanism of the dual role of Si. Initially, Si addition tailors the microstructure by refining grain and promoting Si-rich Laves phases that serve as internal reservoirs. Subsequently, these reservoirs enable the in-situ formation of a nano-dispersed amorphous SiO₂ network along critical diffusion pathways during oxidation. This internal barrier not only effectively impedes ion transport but also dynamically induces the transformation of the Laves phase into Si-depleted R and µ phases. This “beneficial internal oxidation” strategy presents a new paradigm for designing advanced oxidation-resistant alloys, distinct from classical external scale formation.

在无碳Fe-Co-Mo高速钢中添加少量的硅可以显著提高其抗氧化能力，其表观氧化活化能从161.1 kJ/mol（无硅）增加到212.5 kJ/mol（0.5 wt% Si）。这种增强植根于硅的双重作用的新机制。最初，Si的加入通过细化晶粒和促进作为内部储层的富Si Laves相来调整微观结构。随后，这些储层使氧化过程中沿关键扩散路径形成纳米分散的无定形SiO2网络。这种内部屏障不仅有效地阻碍了离子的传输，而且动态地诱导Laves相转变为贫si的R相和µ相。这种“有益的内部氧化”策略为设计先进的抗氧化合金提供了一种新的范例，不同于经典的外部结垢形成。

引用次数: 0

Synergistic Mo and N effects on pitting corrosion of lean duplex stainless steels: A fundamental shift in phase-dependent stability in halide environments Mo和N对贫双相不锈钢点蚀的协同效应：卤化物环境中相依赖稳定性的根本转变

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

Corrosion Science

Pub Date : 2025-12-13 DOI: 10.1016/j.corsci.2025.113556

Yiqi Zhou, Zhigang Yang, Chi Zhang

This study elucidates the roles of Mo and N in the pitting corrosion of lean duplex stainless steels (LDSS) 2101 (0.3 % Mo, 0.21 % N) and LDSS 2001 (0 % Mo, 0.13 % N). The synergistic addition of Mo and N in LDSS 2001 enhances passive film stability in NaCl solution, resulting in a critical pitting potential (E_pit) of 0.32 V_SCE, which is higher than the 0.24 V_SCE measured for LDSS 2101. In NaBr, however, the E_pit values become similar, ranging from 0.33 to 0.35 V_SCE for both grades. Bipolar electrochemistry measurements quantified the corrosion volume loss, with the highest value of 2.73 × 10⁹ μm³ observed for LDSS 2001 in NaCl, with corrosion volume loss was 2.61 × 10⁹ μm³ in NaBr. For LDSS 2101, the corrosion volume loss was 2.62 × 10⁹ μm³ in NaCl and 7.02 × 10⁸ μm³ in NaBr. Here, a faster corrosion growth rate indicates larger corrosion volumes. Pit nucleated in the ferrite phase for LDSS 2001. In NaCl, the austenite phase in LDSS 2101 was the pit nucleation site. In NaBr, LDSS 2101 exhibited a transition from ferrite-nucleated pitting at low potentials to both phases being attacked by pitting at high potentials. These results underscore a fundamental shift in the micro-electrochemical stability of the constituent phases, governed by the interplay between alloying elements and halide ions.

本文研究了Mo和N在贫双相不锈钢（LDSS） 2101（0.3 % Mo, 0.21 % N）和LDSS 2001（0 % Mo, 0.13 % N）点蚀中的作用。在LDSS 2001中，Mo和N的协同添加提高了钝化膜在NaCl溶液中的稳定性，导致临界点蚀电位（Epit）为0.32 VSCE，高于LDSS 2101的0.24 VSCE。然而，在NaBr中，Epit值变得相似，两个等级的范围从0.33到0.35 VSCE。双极电化学测量量化了腐蚀体积损失，LDSS 2001在NaCl中的腐蚀体积损失最大值为2.73 × 109 μm3，在NaBr中的腐蚀体积损失为2.61 × 109 μm3。LDSS 2101在NaCl中的腐蚀体积损失为2.62 × 109 μm3，在NaBr中的腐蚀体积损失为7.02 × 108 μm3。在这里，腐蚀生长速度越快，表明腐蚀体积越大。ldss2001的坑形核为铁素体相。在NaCl中，ldss2101的奥氏体相是坑形核的部位。在NaBr中，LDSS 2101表现出从低电位下铁氧体成核点蚀到高电位下两个相都被点蚀攻击的转变。这些结果强调了组成相的微电化学稳定性的根本转变，由合金元素和卤化物离子之间的相互作用决定。

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引用次数: 0

Effect of Cr on hydrogen-induced delayed fracture of high-strength bolt steel Cr对高强螺栓钢氢致延迟断裂的影响

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

Corrosion Science

Pub Date : 2025-12-12 DOI: 10.1016/j.corsci.2025.113533

Boyang Fang, Weijun Hui, Zhuo Hua, Yixuan Xu, Yongjian Zhang, Xiaoli Zhao

This investigation studied the potential influence of different amounts of alloying element Cr (0.5, 1.2 and 2.1 wt%) on hydrogen-induced delayed fracture (HIDF) performance of V+Nb-microalloyed high-strength bolt steel with high temperature tempered martensitic microstructure. The HIDF performance was evaluated by slow strain rate tensile (SSRT) tests using pre-hydrogen-charged notched specimens. The results show that the size of re-precipitated plate-like nano-sized V-rich MC carbides slightly decreases with the increase in Cr content, and Cr-rich M₇C₃ carbides only exist in the steel containing 2.1 wt% Cr. The HIDF resistance represented by notch tensile strength decreases and the tendency to brittle intergranular fracture along notch root region increases with the increase in Cr content. The diffusible hydrogen contents obtained from both the pre-hydrogen-charged and the fractured SSRT specimens exhibit an increasing trend while the effective hydrogen diffusion coefficient decreases with increasing Cr content. The reasons for this adverse effect of increasing Cr content on HIDF performance are explained by the changes of microstructural characteristics and corresponding hydrogen trapping characteristics.

研究了不同含量的合金元素Cr（0.5、1.2和2.1 wt%）对高温回火马氏体组织V+ nb微合金高强螺栓钢氢致延迟断裂（HIDF）性能的潜在影响。采用预充氢缺口试样进行慢应变速率拉伸（SSRT）试验，评价了HIDF的性能。结果表明：随着Cr含量的增加，再析出的片状纳米级富v MC碳化物的尺寸略有减小，而富Cr的M7C3碳化物仅存在于Cr含量为2.1 wt%的钢中。随着Cr含量的增加，以缺口抗拉强度为代表的HIDF抗力降低，沿缺口根部脆性沿晶间断裂的倾向增加。预充氢和断裂SSRT试样的可扩散氢含量均随Cr含量的增加而增加，而有效氢扩散系数则随Cr含量的增加而减小。Cr含量的增加对HIDF性能产生不利影响的原因可以通过微观结构特征和相应的氢捕获特性的变化来解释。

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引用次数: 0

Effect of titanium ion implantation time on the corrosion and stress corrosion cracking resistance of 304 stainless steel in a chloride environment 钛离子注入时间对304不锈钢在氯化物环境中耐腐蚀和应力腐蚀开裂性能的影响

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

Corrosion Science

Pub Date : 2025-12-12 DOI: 10.1016/j.corsci.2025.113550

Chenhui Hu , Chenyu Li , Zhen Zhang , Youjun Ye , Lin Liu

This study systematically investigates the effect of titanium (Ti) ion implantation time on the corrosion and stress corrosion cracking (SCC) resistance of 304 stainless steel in a chloride environment. Corrosion properties and electrochemical behavior were evaluated using weight loss measurements and electrochemical tests, while SCC susceptibility was assessed via slow strain rate tensile (SSRT) tests. Specimen morphologies were examined using metallographic and scanning electron microscopy (SEM), and microstructural features were characterized by transmission electron microscopy (TEM). Chemical composition and states were analyzed using X-ray photoelectron spectroscopy (XPS). The results indicate that a longer Ti ion implantation time leads to a continuous increase in polarization resistance and a higher pitting potential, which implies an improvement in corrosion resistance. In a chloride environment without external tensile stress, the dominant corrosion mode transitions from general corrosion to pitting corrosion, with severity mitigated by extended implantation times. Moreover, SCC susceptibility decreases markedly, particularly when implantation time exceeds 2.0 h, due to the formation of a reinforced titanium-rich surface film containing a high density of twins and dislocations. The increased density of twins and twin boundaries induced by prolonged Ti ion implantation effectively obstructs dislocation slip under tensile stress, thereby inhibiting SCC propagation.

本研究系统地研究了钛离子注入时间对304不锈钢在氯化物环境中耐腐蚀和应力腐蚀开裂（SCC）性能的影响。通过失重测量和电化学测试来评估腐蚀性能和电化学行为，而通过慢应变速率拉伸（SSRT）测试来评估SCC敏感性。采用金相和扫描电镜（SEM）对样品进行了形貌分析，并用透射电镜（TEM）对样品的微观结构特征进行了表征。用x射线光电子能谱（XPS）分析其化学成分和状态。结果表明：随着Ti注入时间的延长，合金的极化电阻不断增大，点蚀电位增大，表明合金的耐蚀性能有所提高。在没有外部拉应力的氯化物环境中，主要的腐蚀模式从一般腐蚀转变为点蚀，随着注入时间的延长，严重程度有所减轻。此外，SCC敏感性显著降低，特别是当植入时间超过2.0 h时，由于形成了含有高密度孪晶和位错的增强富钛表面膜。长时间Ti注入导致孪晶密度和孪晶边界的增加，有效地阻碍了拉伸应力下的位错滑移，从而抑制了SCC的传播。

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