Corrosion Science最新文献_第3页

Explainable artificial intelligence for visual fingerprinting of copper tubes' atmospheric corrosion in diverse environments 可解释的人工智能在不同环境下对铜管大气腐蚀进行视觉指纹识别

IF 7.4 1区材料科学

Corrosion Science Pub Date : 2026-04-15 Epub Date: 2026-01-30 DOI: 10.1016/j.corsci.2026.113670

Guoyu Tong , Liping Wu , Xiuling Shang , Xiaoying Sun , Dongjiu Zhang , Changgang Wang

{"title":"Explainable artificial intelligence for visual fingerprinting of copper tubes' atmospheric corrosion in diverse environments","authors":"Guoyu Tong , Liping Wu , Xiuling Shang , Xiaoying Sun , Dongjiu Zhang , Changgang Wang","doi":"10.1016/j.corsci.2026.113670","DOIUrl":"10.1016/j.corsci.2026.113670","url":null,"abstract":"<div><div>The corrosion behavior of copper in atmospheric environments is significantly influenced by regional climate. To achieve rapid, in-situ identification and provenance tracing of corrosion status, this study proposes an intelligent analysis method integrating real-field images and explainable machine learning. Departing from planar specimens, this work employs three-dimensional pure copper tubes for greater engineering representativeness. These were exposed outdoors for 2–24 months in three typical environments: Wenchang (marine), Chongqing (urban), and Qingdao (industrial–marine) of China. A dataset of 1500 macroscopic corrosion images was constructed using smartphones, addressing challenges like uneven illumination on curved surfaces. A set of 24 color and texture features was extracted, and six machine learning models were employed for regional classification. The Support Vector Machine (SVM) achieved optimal performance, attaining 99.67 % test accuracy using data mixed from all exposure periods. All models achieved test set accuracies of 96 % or higher, confirming the method's capability to capture regional corrosion visual features that are resistant to temporal variations. Explainability techniques, including feature importance analysis and SLIC superpixel heatmaps, revealed the mean blue and red channel values, blue channel standard deviation, and image entropy as the most critical discriminative features. These features possess clear physical correlations with the chemical composition, spatial distribution, and morphological complexity of corrosion products, constructing an interpretive bridge between macroscopic image features and microscopic corrosion mechanisms. This study validates the feasibility of using smartphones and machine learning for high-accuracy corrosion provenance tracing in complex, real-world scenarios, providing a scientific paradigm and practical foundation for intelligent corrosion diagnosis.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"262 ","pages":"Article 113670"},"PeriodicalIF":7.4,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185266","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

The dual and decoupled roles of ultra-low sulfur content in the stress corrosion cracking of a 17–4PH martensitic steel in geothermal environments 地热环境中超低硫含量对17-4PH马氏体钢应力腐蚀开裂的双重和非耦合作用

IF 7.4 1区材料科学

Corrosion Science Pub Date : 2026-04-15 Epub Date: 2026-02-03 DOI: 10.1016/j.corsci.2026.113688

Pan Liu , Yasuaki Watanabe , Yunlong Wu , Mitsuo Yamashita , Sakae Izumi , Xiangyu Zhong , Jun Chai , Qinhao Zhang , Fahe Cao , Yutaka Watanabe , Tetsuo Shoji

{"title":"The dual and decoupled roles of ultra-low sulfur content in the stress corrosion cracking of a 17–4PH martensitic steel in geothermal environments","authors":"Pan Liu , Yasuaki Watanabe , Yunlong Wu , Mitsuo Yamashita , Sakae Izumi , Xiangyu Zhong , Jun Chai , Qinhao Zhang , Fahe Cao , Yutaka Watanabe , Tetsuo Shoji","doi":"10.1016/j.corsci.2026.113688","DOIUrl":"10.1016/j.corsci.2026.113688","url":null,"abstract":"<div><div>The influence of ultra-low sulfur content on the stress corrosion cracking (SCC) susceptibility of 17–4PH martensitic steel was systematically investigated in a simulated H<sub>2</sub>S-containing geothermal environment. Through a combination of advanced experimental characterization and first-principles calculations, we demonstrate that reducing the sulfur content from 0.003 wt% to an ultra-low 0.0006 wt% markedly enhances SCC resistance. This enhancement arises from a synergistic mitigation of both anodic dissolution and hydrogen embrittlement mechanisms. The ultra-low-sulfur steel develops a thicker, less defective, and more chemically stable passive film, while the refinement of electrochemically active sulfide inclusions suppresses the initiation of critical-sized corrosion pits. While the inherent strong irreversible hydrogen traps associated with sulfide inclusions decreases, the overall interplay between the anodic and cathodic effects of sulfide inclusions results in improved SCC resistance. Density functional theory (DFT) and <em>ab initio</em> molecular dynamics (AIMD) simulations assisted by machine-learning force fields (ML-FFs) were employed to decouple the distinct roles of the main sulfide inclusions. These calculations unambiguously identify MnS interfaces as strong thermodynamic traps (<em>E</em><sub>form</sub>=-2.51 eV) but slow diffusion paths, whereas NbS<sub>2</sub> interfaces are weak traps but serve as rapid diffusion pathways. The improved performance is therefore a direct consequence of eliminating the deleterious MnS inclusions, which act simultaneously as pit initiation sites, catalytic surfaces for hydrogen ingress, and the dominant deep traps for hydrogen accumulation.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"262 ","pages":"Article 113688"},"PeriodicalIF":7.4,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185272","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

Corrosion fatigue behavior of Ti-4Al-6Mo-2V-5Cr-2Zr alloy with different microstructures in 3.5 % NaCl solution 不同组织Ti-4Al-6Mo-2V-5Cr-2Zr合金在3.5 % NaCl溶液中的腐蚀疲劳行为

IF 7.4 1区材料科学

Corrosion Science Pub Date : 2026-04-15 Epub Date: 2026-01-22 DOI: 10.1016/j.corsci.2026.113645

Shengyuan Wang , Ruochong Liu , Haoyu Zhang , Ge Zhou , Xiao-Bo Chen , Lijia Chen

{"title":"Corrosion fatigue behavior of Ti-4Al-6Mo-2V-5Cr-2Zr alloy with different microstructures in 3.5 % NaCl solution","authors":"Shengyuan Wang , Ruochong Liu , Haoyu Zhang , Ge Zhou , Xiao-Bo Chen , Lijia Chen","doi":"10.1016/j.corsci.2026.113645","DOIUrl":"10.1016/j.corsci.2026.113645","url":null,"abstract":"<div><div>Ti-4Al-6Mo-2V-5Cr-2Zr alloy with different microstructures was prepared through two heat treatment processes (STA 1 and STA 2), and its corrosion fatigue behavior in a 3.5 % NaCl solution was investigated. STA 1 forms a hierarchical nanostructure (HN) containing coarse grain boundary α (GB α), primary α (α<sub>p</sub>), and nanoscale secondary α (α<sub>s</sub>) with significant elemental segregation. In contrast, STA 2 forms a lamellar structure (LM) composed of fine, needle-like α<sub>s</sub> with uniform element distribution. Results indicate that LM has better corrosion resistance, its passive film resistance (4.328 ×10<sup>6</sup> Ω·cm<sup>2</sup>) is higher than that of HN (1.101 ×10<sup>6</sup> Ω·cm<sup>2</sup>, 6.9 nm). In a 3.5 % NaCl solution, STA 1 shows significant corrosion fatigue behavior, whereas STA 2 does not exhibit any signs of corrosion fatigue. The deformation in HN mainly occurs within the coarse α phase, and the high dislocation density can lead to localized stress concentrations, thereby damaging the passivation film and initiating corrosion fatigue cracks.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"262 ","pages":"Article 113645"},"PeriodicalIF":7.4,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146036905","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

Oxidation of Co and two architectured CeO2-Co coated ferritic stainless steel for SOC interconnect application: Description, kinetics, and mechanism 氧化Co和两种结构CeO2-Co涂层铁素体不锈钢用于SOC互连应用：描述，动力学和机制

IF 7.4 1区材料科学

Corrosion Science Pub Date : 2026-04-15 Epub Date: 2026-01-16 DOI: 10.1016/j.corsci.2026.113637

Mathilde Bouvier , Antoine Casadebaigt , Sophie Bosonnet , Theo Dejob , Gwladys Steciuk , Karine Couturier , Jolan Bestautte , Justine Poncelet , Fabien Rouillard

{"title":"Oxidation of Co and two architectured CeO2-Co coated ferritic stainless steel for SOC interconnect application: Description, kinetics, and mechanism","authors":"Mathilde Bouvier , Antoine Casadebaigt , Sophie Bosonnet , Theo Dejob , Gwladys Steciuk , Karine Couturier , Jolan Bestautte , Justine Poncelet , Fabien Rouillard","doi":"10.1016/j.corsci.2026.113637","DOIUrl":"10.1016/j.corsci.2026.113637","url":null,"abstract":"<div><div>The oxidation behaviour of bare AISI 441, as well as Co-, CeO<sub>2</sub>-Co-, and Co-CeO<sub>2</sub>- coated samples intended for SOC interconnect applications, was investigated at 800 °C in air using short- and long-term oxidation kinetics together with Cr vaporization measurements. All coatings significantly reduced both Cr vaporization and the growth rate of the chromia scale. The lowest oxidation kinetics were obtained for the Co coatings containing CeO<sub>2</sub>, irrespective of whether the CeO<sub>2</sub> layer was placed above or below the Co layer. However, the chemical composition and microstructural evolution of the oxide scale were influenced by the relative positioning of the CeO<sub>2</sub> layer. Microstructural analyses of the scale formed during the heating ramp, together with its evolution during prolonged exposures of up to 5000 h, made it possible to propose an oxidation mechanism for all coating configurations and to clarify the role of Ce in controlling the oxide growth rate.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"262 ","pages":"Article 113637"},"PeriodicalIF":7.4,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146075827","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

Tailoring multi-level hydrogen trap architecture in low-alloy steel via vibration-assisted forming for enhanced hydrogen embrittlement resistance 通过振动辅助成形在低合金钢中剪裁多级氢阱结构，以增强抗氢脆性

IF 7.4 1区材料科学

Corrosion Science Pub Date : 2026-04-15 Epub Date: 2026-02-02 DOI: 10.1016/j.corsci.2026.113686

Lingxiao Li , Lunsu Liang , Ronglai Xie , Zengtao Chen , Minghao Zhao , Xiaohua Liu , Gang Wang , Minghan Sun

{"title":"Tailoring multi-level hydrogen trap architecture in low-alloy steel via vibration-assisted forming for enhanced hydrogen embrittlement resistance","authors":"Lingxiao Li , Lunsu Liang , Ronglai Xie , Zengtao Chen , Minghao Zhao , Xiaohua Liu , Gang Wang , Minghan Sun","doi":"10.1016/j.corsci.2026.113686","DOIUrl":"10.1016/j.corsci.2026.113686","url":null,"abstract":"<div><div>Controlling hydrogen distribution is a critical strategy for mitigating hydrogen embrittlement (HE) in structural steels. Herein, we propose a multi-trap design strategy wherein a mechanical vibration field is introduced during the forming stage of a low-alloy steel. In addition to promoting significant grain and precipitate refinement, this approach uniquely constructs a high density of intragranular planar defects. These defects, acting in synergy with the refined grain boundaries and dispersed precipitates, constitute a multi-trap system that leverages the vast intragranular space to achieve a more homogeneous hydrogen distribution, thereby significantly enhancing HE resistance. Microstructural characterization and thermal desorption spectroscopy of the vibrated samples confirm their superior capability to tailor hydrogen distribution under identical charging conditions. Through a combination of advanced characterization, crystal plasticity finite element modeling, molecular dynamics simulations, and density functional theory calculations, we comprehensively elucidate the microstructural evolution and formation mechanism of these intragranular trapping interfaces. This work quantifies their hydrogen-trapping efficiency and delineates the distinct roles of precipitates and refined grain boundaries in governing the overall hydrogen partitioning. The proposed trap design philosophy and associated processing route offer a promising and scalable pathway for developing commercially viable, bulk HE-resistant alloy steels.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"262 ","pages":"Article 113686"},"PeriodicalIF":7.4,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185270","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

Insight into the corrosion fatigue crack growth mechanism of a ZrSnNb alloy in simulated PWR primary water 模拟压水堆一次水中ZrSnNb合金腐蚀疲劳裂纹扩展机制研究

IF 7.4 1区材料科学

Corrosion Science Pub Date : 2026-04-15 Epub Date: 2026-01-26 DOI: 10.1016/j.corsci.2026.113668

Yuqi Zheng, Jun Xiao, Ting Xiao, Wanli Ma, Jingjing Liao, Yong Chen, Hao Wang, Qi Xu

{"title":"Insight into the corrosion fatigue crack growth mechanism of a ZrSnNb alloy in simulated PWR primary water","authors":"Yuqi Zheng, Jun Xiao, Ting Xiao, Wanli Ma, Jingjing Liao, Yong Chen, Hao Wang, Qi Xu","doi":"10.1016/j.corsci.2026.113668","DOIUrl":"10.1016/j.corsci.2026.113668","url":null,"abstract":"<div><div>The corrosion fatigue crack growth (CFCG) behavior of a Zr–Sn–Nb alloy was systematically investigated in simulated PWR primary water (320 °C, 12.5 MPa) under controlled dissolved oxygen (DO: 10–500 ppb) and dissolved hydrogen (DH: 0–30 cc (STP)/kg H₂O) conditions. A pronounced environmental acceleration is demonstrated, with the CFCG rate under low frequency (0.001 Hz), high stress ratio (0.9), and 100 ppb DO exceeding the air value by up to a factor of 250. In contrast, DO and DH variations exhibit only a modest influence on crack growth kinetics within the tested ranges. Microstructural analyses reveal a crack-tip oxide scale predominantly composed of monoclinic ZrO₂, accompanied by limited dislocation activity and extensive needle-shaped hydride precipitation in the adjacent matrix. The observed behavior is consistent with a slip-oxidation-rupture mechanism, which is established as the governing process. These findings underscore that mechanical driving forces (frequency, stress ratio), rather than bulk water redox chemistry, dominate the CFCG response of zirconium alloys in this environment.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"262 ","pages":"Article 113668"},"PeriodicalIF":7.4,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146075754","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

Synergistic effect of residual stress and hydrogen trapping on pitting corrosion in 2205 duplex stainless steel welded joints 残余应力和氢捕获对2205双相不锈钢焊接接头点蚀的协同作用

IF 7.4 1区材料科学

Corrosion Science Pub Date : 2026-04-15 Epub Date: 2026-01-27 DOI: 10.1016/j.corsci.2026.113671

Puren Liu , Wenhui Ye , Qing Zheng , Lining Xu , Jinyang Zhu , Lijie Qiao

{"title":"Synergistic effect of residual stress and hydrogen trapping on pitting corrosion in 2205 duplex stainless steel welded joints","authors":"Puren Liu , Wenhui Ye , Qing Zheng , Lining Xu , Jinyang Zhu , Lijie Qiao","doi":"10.1016/j.corsci.2026.113671","DOIUrl":"10.1016/j.corsci.2026.113671","url":null,"abstract":"<div><div>Duplex stainless steels (DSSs) are widely used in hydrogen-containing environments owing to their excellent mechanical properties and corrosion resistance. However, hydrogen-induced localized corrosion, particularly hydrogen damage to welded joints, poses a major challenge that requires further understanding. Accordingly, This study examines a 2205 DSS welded joint using electron backscatter diffraction, hydrogen microprint testing, local electrochemical measurements, and in situ corrosion monitoring. The results show that the heat-affected zone (HAZ) exhibits the highest pitting susceptibility under hydrogen exposure, primarily due to its high residual stress concentration, which promotes localized hydrogen accumulation. This stress-assisted hydrogen enrichment accelerates pit initiation and growth at microstructural features such as inclusions and phase boundaries, ultimately leading to preferential failure in the HAZ. The findings clarify the mechanism of stress‑driven hydrogen localization and its role in corrosion failure, providing a theoretical basis for designing hydrogen-embrittlement-resistant DSS weldments.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"262 ","pages":"Article 113671"},"PeriodicalIF":7.4,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146075758","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

Effect of oxygen on fatigue crack growth in P92 steel at 600 °C: Atmosphere and vacuum 600℃时氧对P92钢疲劳裂纹扩展的影响：气氛和真空

IF 7.4 1区材料科学

Corrosion Science Pub Date : 2026-04-15 Epub Date: 2026-01-30 DOI: 10.1016/j.corsci.2026.113680

Kang-Kang Wang , Xiang-Ren Bai , Nai-Jian Dong , Shuai Chang , Jian-Feng Wen , Ting Ye , Jian-Ping Tan , Xian-Cheng Zhang , Shan-Tung Tu

{"title":"Effect of oxygen on fatigue crack growth in P92 steel at 600 °C: Atmosphere and vacuum","authors":"Kang-Kang Wang , Xiang-Ren Bai , Nai-Jian Dong , Shuai Chang , Jian-Feng Wen , Ting Ye , Jian-Ping Tan , Xian-Cheng Zhang , Shan-Tung Tu","doi":"10.1016/j.corsci.2026.113680","DOIUrl":"10.1016/j.corsci.2026.113680","url":null,"abstract":"<div><div>Oxidation plays a critical role in the fatigue failure of high-temperature alloys, yet its synergy with creep during fatigue crack growth (FCG) remains insufficiently resolved. Here, FCG behavior of P92 steel at 600 °C was quantified under high vacuum (∼10<sup>−3</sup> Pa) and atmosphere using trapezoidal loading with varying hold times (0–3600 s), to isolate coupled oxidation-creep effects. Relative to vacuum, oxidation in atmosphere accelerated FCG: to reach a 1 mm crack extension, atmosphere required 1585 cycles versus 3051 in vacuum (51.9 % of the cycles). The acceleration intensified with extended holding: at Δ<em>K</em> = 38.4 MPa·m<sup>0.5</sup> with a hold time of 3600 s, the atmospheric d<em>a</em>/d<em>N</em> was approximately 4.28 times the vacuum value. A Δ<em>K</em>-dependent transition was identified: oxidation elevated d<em>a</em>/d<em>N</em> below approximately 35–40 MPa·m<sup>0.5</sup>, whereas rates in atmosphere and vacuum converged at higher Δ<em>K</em> (dominated by mechanical driving force). Mechanistically, atmosphere promoted fatigue-dominated transgranular cracking via cyclic crack-tip oxide fracture/reformation, whereas longer hold time in vacuum shift the path from transgranular to mixed trans/intergranular with creep cavity nucleation along boundaries. Oxide analysis showed a stratified scale with an Fe-rich outer layer and a Cr-enriched inner layer adjacent to the substrate, consistent with outward Cr diffusion. The proposed failure mechanism maps offered insights into the interaction between oxidation, creep, and fatigue, providing a framework for understanding FCG of P92 under service conditions.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"262 ","pages":"Article 113680"},"PeriodicalIF":7.4,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185264","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

Corrosion mechanism in produced water from the petroleum industry experimental corroboration of Galvele’s Pitting Theory 石油工业采出水中腐蚀机理Galvele点蚀理论的实验验证

IF 7.4 1区材料科学

Corrosion Science Pub Date : 2026-04-15 Epub Date: 2026-01-29 DOI: 10.1016/j.corsci.2026.113676

Verónica V. Acosta , Gustavo L. Bianchi , Pablo Rosales

{"title":"Corrosion mechanism in produced water from the petroleum industry experimental corroboration of Galvele’s Pitting Theory","authors":"Verónica V. Acosta , Gustavo L. Bianchi , Pablo Rosales","doi":"10.1016/j.corsci.2026.113676","DOIUrl":"10.1016/j.corsci.2026.113676","url":null,"abstract":"<div><div>Pitting corrosion is one of the most critical degradation mechanisms affecting carbon steel pipelines exposed to CO₂-containing produced water in the petroleum industry. In such environments, high salinity, elevated chloride levels, alkaline earth cations, and restricted mass transport promote localized electrochemical conditions that may lead to severe internal corrosion. This work experimentally examines Galvele’s [1] localized acidification theory through potentiodynamic polarization tests conducted in controlled CO₂-saturated aqueous solutions containing Cl⁻, Ca²⁺, and carbonate species. Cyclic polarization curves were used to identify pitting and repassivation behavior under different chemical conditions, while surface observations correlated electrochemical responses with damage morphology. The results demonstrate that pitting susceptibility is strongly governed by chloride concentration and by the nature of the accompanying cation. Calcium supplied as CaCO₃ markedly inhibits pitting through the combined effect of carbonate ions, which neutralize localized acidity, and the rapid formation of protective carbonate-based substrates. In contrast, when calcium is introduced as CaCl₂, localized corrosion persists due to the dominant aggressive effect of chloride ions. These findings provide experimental support for Galvele’s framework and clarify the mechanistic role of calcium and carbonate species in controlling pitting corrosion in produced-water environments.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"262 ","pages":"Article 113676"},"PeriodicalIF":7.4,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185268","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

Effect of shielding gas composition on weld formation and H2S stress corrosion susceptibility of X65 pipeline steel 保护气体成分对X65管线钢焊缝成形及H2S应力腐蚀敏感性的影响

IF 7.4 1区材料科学

Corrosion Science Pub Date : 2026-04-15 Epub Date: 2026-01-29 DOI: 10.1016/j.corsci.2026.113678

Yusheng Yan , Xiaoze Liu , Youhui Sun , Yongzhen Liu , Wenzhou Liang , Lianyong Xu , Kangda Hao , Yongdian Han

{"title":"Effect of shielding gas composition on weld formation and H2S stress corrosion susceptibility of X65 pipeline steel","authors":"Yusheng Yan , Xiaoze Liu , Youhui Sun , Yongzhen Liu , Wenzhou Liang , Lianyong Xu , Kangda Hao , Yongdian Han","doi":"10.1016/j.corsci.2026.113678","DOIUrl":"10.1016/j.corsci.2026.113678","url":null,"abstract":"<div><div>The effect of shielding-gas composition on weld formation, microstructure, and H<sub>2</sub>S stress corrosion cracking (SSCC) in cold metal transfer (CMT) welds was examined. Pure argon shielding led to incomplete penetration and carbide precipitation. Moderate addition of CO<sub>2</sub> (10–20 %) improved arc stability and weld quality, yielding a bainite-dominated coarse-grained heat-affected zone (CGHAZ) microstructure. Excessive CO<sub>2</sub> (50 %) increased the cooling rate and induced martensite formation in the CGHAZ. Severe pitting occurred in both the weld metal and CGHAZ. Strong Si segregation in the weld metal produced Volta potential differences > 50 mV, driving microgalvanic dissolution. Although the CGHAZ showed minimal elemental segregation, its microstructural heterogeneity, characterized by coarse grains, high dislocation density, and hydrogen trapping, enhanced local anodic activity even with a potential difference below 35 mV. Acicular ferrite impeded microcrack propagation, whereas martensite promoted hydrogen accumulation and accelerated crack growth.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"262 ","pages":"Article 113678"},"PeriodicalIF":7.4,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146075824","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