Corrosion Science最新文献_第8页

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 : 2026-04-01 Epub 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

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 : 2026-04-01 Epub 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 : 2026-04-01 Epub 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

Investigation on hydrogen embrittlement behaviour of X65 steel base metal and girth weld metal under in-situ hydrogen environment 原位氢环境下X65钢母材和环焊缝金属氢脆行为研究

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

Corrosion Science

Pub Date : 2026-04-01 Epub Date: 2026-01-10 DOI: 10.1016/j.corsci.2026.113625

Yuanxing Ning , Peixun Yang , Ming Song , Yan Wang , Yuxing Li , Cuiwei Liu , Cailin Wang

This study systematically investigates the hydrogen embrittlement (HE) behavior of X65 pipeline steel base metal (BM) and weld metal (WM) in gaseous hydrogen environments. The hydrogen permeation characteristics, fatigue properties and fracture behaviour of both the BM and WM under various hydrogen partial pressure environments were considered intensively. Electron backscatter scanning diffraction (EBSD) was employed to characterize crystallographic features of the BM and WM. The results indicate that the BM exhibits no pronounced texture and contains a low proportion of high angle grain boundaries (HAGBs). The WM shows distinct texture and possesses relatively low dislocation density. Under in-situ gaseous hydrogen charging conditions, the hydrogen diffusivity for various regions of WM are about half an order of magnitude greater than that of the BM. With the increase of hydrogen partial pressure, the correlation between partial pressure and the fatigue crack growth rate (FCGR) weakens. At the hydrogen partial pressure of 1.26 MPa, the FCGRR of WM is approximately 1.4 times that of the BM, which is more susceptible to hydrogen effects. Macroscopic and microscopic analyzes of the specimen fracture surfaces were conducted using a 3D super depth of field microscope and a scanning electron microscope (SEM). Comparing with BM specimens, WM specimens accompany more abundant brittle fracture characteristics and exhibit lower fracture toughness. Under the identical hydrogen partial pressure, the embrittlement index (EI) of BM and WM are comparable, whereas the fracture toughness of WM was approximately 37.7 % and 14.6 % lower than those of BM respectively.

本研究系统地研究了X65管线钢母材（BM）和焊缝金属（WM）在气态氢环境中的氢脆（HE）行为。研究了不同氢分压环境下BM和WM的氢渗透特性、疲劳性能和断裂行为。采用电子背散射扫描衍射（EBSD）对BM和WM的晶体学特征进行了表征。结果表明：BM没有明显的织构，高角晶界（HAGBs）的比例较低；WM组织清晰，位错密度较低。在原位充氢条件下，WM各区域的氢扩散系数比BM大约半个数量级。随着氢分压的增大，分压与疲劳裂纹扩展速率（FCGR）的相关性减弱。氢气分压为1.26 MPa时，WM的FCGRR约为BM的1.4倍，更容易受到氢气效应的影响。采用三维超景深显微镜和扫描电子显微镜对试样断口进行了宏观和微观分析。与BM试样相比，WM试样具有更丰富的脆性断裂特征，断裂韧性较低。在相同的氢分压下，BM和WM的脆化指数（EI）相当，而WM的断裂韧性分别比BM低约37.7 %和14.6 %。

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引用次数: 0

Laser-assisted wire-arc additive manufacturing of Mg-Al-Ce-Mn-Ca alloy with enhanced corrosion resistance 具有增强耐蚀性的Mg-Al-Ce-Mn-Ca合金的激光辅助线弧增材制造

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

Corrosion Science

Pub Date : 2026-04-01 Epub Date: 2026-01-08 DOI: 10.1016/j.corsci.2026.113608

Jinghua Tian , Linqian Wang , Bingqiang Wei , Min Zha , Xiangyang Yuan , Shenbao Jin , Fei Zhang , Zulai Li , Hui-Yuan Wang

Mg alloys prepared by wire arc additive manufacturing (WAAM) typically exhibit low corrosion resistance due to the presence of defects and microstructural inhomogeneities. In this study, laser was integrated into the WAAM process of a Mg-0.7Al-0.6Ce-0.5Mn-0.5Ca (wt%) alloy to tailor its microstructure. The influence of laser input power on alloy’s microstructural characteristics, including defect, grain size, texture and residual stress was systematically investigated. Furthermore, the resulting changes in corrosion behavior associated with these microstructural modifications were examined. The results reveal that applying a laser power of 200 W significantly reduced both defect size and grain size, which mitigated pitting corrosion and enhanced the protectiveness of the surface film. Consequently, a corrosion rate of 1.37 mm/y in 3.5 wt% NaCl solution was achieved, ∼28.6 % lower than that of the alloy prepared without laser assistance (1.92 mm/y). However, excessive laser power (e.g. 500 W) led to the formation of coarse grains with non-basal orientation and high residual stress, which preferentially corroded and initiated severe localized corrosion, increasing the corrosion rate to 2.61 mm/y. Overall, these findings demonstrate that incorporating laser heating with optimized input power is an effective strategy to enhance the corrosion resistance of WAAM-fabricated Mg alloys.

电弧增材制造（WAAM）制备的镁合金由于存在缺陷和微观组织不均匀性，通常表现出较低的耐腐蚀性。在本研究中，将激光集成到Mg-0.7Al-0.6Ce-0.5Mn-0.5Ca （wt%）合金的WAAM工艺中，以定制其显微组织。系统研究了激光输入功率对合金缺陷、晶粒尺寸、织构和残余应力等微观组织特性的影响。此外，研究了与这些微观结构修饰相关的腐蚀行为的变化。结果表明，当激光功率为200 W时，缺陷尺寸和晶粒尺寸均显著减小，从而减轻了点蚀，增强了表面膜的防护性。因此，在3.5 wt% NaCl溶液中，合金的腐蚀速率为1.37 mm/y，比没有激光辅助制备的合金（1.92 mm/y）低28.6 %。然而，过大的激光功率（如500 W）导致形成非基取向和高残余应力的粗晶粒，这些晶粒优先腐蚀并引发严重的局部腐蚀，使腐蚀速率增加到2.61 mm/y。总的来说，这些发现表明，在优化输入功率的情况下结合激光加热是提高waam制造的镁合金耐腐蚀性的有效策略。

{"title":"Laser-assisted wire-arc additive manufacturing of Mg-Al-Ce-Mn-Ca alloy with enhanced corrosion resistance","authors":"Jinghua Tian , Linqian Wang , Bingqiang Wei , Min Zha , Xiangyang Yuan , Shenbao Jin , Fei Zhang , Zulai Li , Hui-Yuan Wang","doi":"10.1016/j.corsci.2026.113608","DOIUrl":"10.1016/j.corsci.2026.113608","url":null,"abstract":"<div><div>Mg alloys prepared by wire arc additive manufacturing (WAAM) typically exhibit low corrosion resistance due to the presence of defects and microstructural inhomogeneities. In this study, laser was integrated into the WAAM process of a Mg-0.7Al-0.6Ce-0.5Mn-0.5Ca (wt%) alloy to tailor its microstructure. The influence of laser input power on alloy’s microstructural characteristics, including defect, grain size, texture and residual stress was systematically investigated. Furthermore, the resulting changes in corrosion behavior associated with these microstructural modifications were examined. The results reveal that applying a laser power of 200 W significantly reduced both defect size and grain size, which mitigated pitting corrosion and enhanced the protectiveness of the surface film. Consequently, a corrosion rate of 1.37 mm/y in 3.5 wt% NaCl solution was achieved, ∼28.6 % lower than that of the alloy prepared without laser assistance (1.92 mm/y). However, excessive laser power (e.g. 500 W) led to the formation of coarse grains with non-basal orientation and high residual stress, which preferentially corroded and initiated severe localized corrosion, increasing the corrosion rate to 2.61 mm/y. Overall, these findings demonstrate that incorporating laser heating with optimized input power is an effective strategy to enhance the corrosion resistance of WAAM-fabricated Mg alloys.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"261 ","pages":"Article 113608"},"PeriodicalIF":7.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145974754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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 : 2026-04-01 Epub 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。

{"title":"Microstructural characteristics and oxidation behaviors of heat-resistant Cu-Ni-Al alloys with co-addition of Cr and Zr","authors":"Zhumin Li , Yuan Li , Jiansheng Li , Yusheng Li , Yuehong Zheng , Wei Jiang , Ao Meng , Qingzhong Mao , Yonghao Zhao","doi":"10.1016/j.corsci.2026.113603","DOIUrl":"10.1016/j.corsci.2026.113603","url":null,"abstract":"<div><div>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 (Δ<em>H</em><sub>Ni-Cr</sub> = −7 kJ/mol) and Zr-Ni (Δ<em>H</em><sub>Ni-Zr</sub> = −49 kJ/mol) facilitate the complete solid solution of Cr and Zr in the γ and γ′ phases of the Cu<sub>49.66</sub> 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 Ni<sub>5</sub>Zr 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/cm<sup>2</sup> at 850 ℃. This behavior is attributed to: (1) Cr promotes the formation of Al<sub>2</sub>O<sub>3</sub> 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 Ni<sub>5</sub>Zr 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.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"261 ","pages":"Article 113603"},"PeriodicalIF":7.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145923647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of Pt contents on oxidation behavior of single-phase Pt-modified γ′-Ni3Al Pt含量对单相Pt修饰γ′-Ni3Al氧化行为的影响

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

Corrosion Science

Pub Date : 2026-04-01 Epub Date: 2026-01-16 DOI: 10.1016/j.corsci.2026.113636

Haoxuan Feng , Shuai Li , Yao Du , Mingyu Wu , Mingli Shen , Zebin Bao , Shenglong Zhu , Fuhui Wang

A comparative study was conducted on the isothermal oxidation behavior at 1050 °C of three Pt modified single-phase γ′ alloys with different Pt contents (12, 16 and 30 at%) and the binary γ′-Ni₃Al in air. Results revealed that 12 at% Pt was high enough to form a continuous external alumina scale. Both the growth rate and the residual stress of the alumina scale were significantly reduced by Pt addition, and the higher Pt content, the lower oxidation rate and residual stress. Besides, Pt suppressed the formation of interfacial voids, and retarded the phase transformation from θ → α-Al₂O₃, while delayed the γ' → γ transformation in the underlying metals. Analysis thought that the enhanced Al diffusion rate by Pt modification may play key roles in promoting the selective oxidation of Al, while the reduced Al activity may play minor roles. This work strongly suggests that addition of 30 at% Pt in single-phase γ′ coating is favorable to low oxidation rate and excellent scale adherence.

对比研究了三种不同Pt含量（12、16和30 at%）的Pt改性单相γ′合金和二元γ′-Ni3Al在1050℃空气中的等温氧化行为。结果表明，12 在% Pt时足够高，形成连续的外部氧化铝垢。Pt含量越高，氧化速率越低，残余应力越小；Pt抑制了界面空洞的形成，延缓了θ→α-Al2O3的相变，延缓了基体中γ′→γ的相变。分析认为，通过Pt改性提高Al的扩散速率可能是促进Al选择性氧化的关键因素，而降低Al的活性可能是次要因素。本研究结果表明，在单相γ′涂层中添加30 at% Pt有利于低氧化率和良好的结垢附着力。

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引用次数: 0

Effect of strain amplitudes and ductility dip cracking on corrosion fatigue behavior of stainless steel weld metal in high-temperature pressurized water 应变幅值和延性浸裂对不锈钢焊缝金属在高温加压水中腐蚀疲劳行为的影响

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

Corrosion Science

Pub Date : 2026-04-01 Epub Date: 2026-01-01 DOI: 10.1016/j.corsci.2025.113589

Long Zhou , Xu Zhang , Ziyu Zhang , Jibo Tan , Xinqiang Wu

Corrosion fatigue (CF) behavior of stainless steel weld metal in high temperature water environment at the strain rate of 0.004 %s⁻¹ was investigated under different strain amplitudes (0.3 %, 0.6 %, 0.8 %). A degradation in fatigue life was observed and the environmental fatigue correction factor (F_en) increased with decreasing strain amplitude. Intergranular ductility dip cracking (DDC) welding defects were found in stainless steel weld metal, promoting initiation and propagation of CF cracks. It was found that stress concentration and the obstruction of Cr oxides at the γ/δ phase boundary increased the susceptibility to phase boundary cracking under high strain amplitude. Mechanisms involving DDC cracks, strain amplitude, phase boundary and δ-ferrite on CF damage are discussed.

在应变率为0.004 %s−1的高温水环境中，研究了不同应变幅值（0.3 %,0.6 %,0.8 %）下不锈钢焊缝金属的腐蚀疲劳行为。环境疲劳修正系数（Fen）随应变幅值的减小而增大。不锈钢焊缝金属存在沿晶延展性dip裂纹（DDC）焊接缺陷，促进了CF裂纹的萌生和扩展。结果表明，在高应变幅下，应力集中和Cr氧化物在γ/δ相边界处的阻塞增加了相边界开裂的敏感性。讨论了DDC裂纹、应变幅值、相边界和δ-铁素体对CF损伤的机理。

引用次数: 0

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 : 2026-04-01 Epub 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 : 2026-04-01 Epub 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。

{"title":"How do system-specific conditions limit the validity of linear polarization resistance and potentiodynamic polarization in determining corrosion rates?","authors":"Marcel Roy B. Domalanta , Stephanie S. Mathew , Andrea Clarisse C. Corrales , Reymark D. Maalihan , Eugene B. Caldona","doi":"10.1016/j.corsci.2026.113616","DOIUrl":"10.1016/j.corsci.2026.113616","url":null,"abstract":"<div><div>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<sup>−6</sup> 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; R<sup>2</sup> 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.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"261 ","pages":"Article 113616"},"PeriodicalIF":7.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145974630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0