Corrosion Science最新文献

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The effect of sulfur and lead on the corrosion of steam generator tubes made of alloy 690 thermally treated exposed to a wet steam environment at 320 °C 硫磺和铅对暴露在320°C湿蒸汽环境中热处理的690合金蒸汽发生器管腐蚀的影响
IF 7.4 1区 材料科学
Corrosion Science Pub Date : 2025-07-19 DOI: 10.1016/j.corsci.2025.113202
Estelle Lagardère , Adil Shaik , Suraj Persaud , Nicolas Huin , Ian de Curières , Lydia Laffont
{"title":"The effect of sulfur and lead on the corrosion of steam generator tubes made of alloy 690 thermally treated exposed to a wet steam environment at 320 °C","authors":"Estelle Lagardère ,&nbsp;Adil Shaik ,&nbsp;Suraj Persaud ,&nbsp;Nicolas Huin ,&nbsp;Ian de Curières ,&nbsp;Lydia Laffont","doi":"10.1016/j.corsci.2025.113202","DOIUrl":"10.1016/j.corsci.2025.113202","url":null,"abstract":"<div><div>The corrosion behavior of thermally treated (TT) alloy 690 steam generator (SG) tubes was studied in a wet steam environment at 320 °C with the addition of S and Pb. These pollutants are known to accumulate in heat transfer crevices in SGs and can contribute to stress corrosion cracking (SCC). Oxide penetrations were observed at the oxide-metal interface in both S-only and Pb/S-polluted environments. Characterization by transmission electron microscopy (TEM) revealed a growth of the oxide penetrations along {111} slip planes of the alloy and traces of S and Pb at the oxide-metal interface. Characterization results have enabled us to propose a model to explain the formation of these oxide penetrations and the potential role of Pb and S on them.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"256 ","pages":"Article 113202"},"PeriodicalIF":7.4,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144679193","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
Atomic insights into hydrogen accelerated oxidation of 316 L in high-temperature water and steam 原子洞察氢加速氧化316 L在高温水和蒸汽
IF 7.4 1区 材料科学
Corrosion Science Pub Date : 2025-07-19 DOI: 10.1016/j.corsci.2025.113200
Haodong Wu , Yukun Yuan , Zhangping He , Yaqing Ren , Jiajun Liu , Jing Nong , Xiangguo Li , Haijing Sun , Jian Xu
{"title":"Atomic insights into hydrogen accelerated oxidation of 316 L in high-temperature water and steam","authors":"Haodong Wu ,&nbsp;Yukun Yuan ,&nbsp;Zhangping He ,&nbsp;Yaqing Ren ,&nbsp;Jiajun Liu ,&nbsp;Jing Nong ,&nbsp;Xiangguo Li ,&nbsp;Haijing Sun ,&nbsp;Jian Xu","doi":"10.1016/j.corsci.2025.113200","DOIUrl":"10.1016/j.corsci.2025.113200","url":null,"abstract":"<div><div>The hydrogen accelerated oxidation of 316 L in high-temperature dry air, water, and steam is characterized by transmission electron microscopy, atomic probe tomography, and density functional theory calculations. The thickness of the inner layer decreased in the following order: steam&gt;water&gt;dry air. Interstitial hydrogen (H<sub>i</sub>) concentrates at the interface between the inner and outer oxide layers and diffuses downward, leading to a more complex inner-oxide layer. H<sub>i</sub> promotes Cr and O diffusivity by reducing vacancy formation and diffusion energy barriers.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"256 ","pages":"Article 113200"},"PeriodicalIF":7.4,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144670516","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
Stress corrosion cracking susceptibility and propagation behavior of TC4 titanium alloy in simulated deep-sea environment TC4钛合金在模拟深海环境中的应力腐蚀开裂敏感性及扩展行为
IF 7.4 1区 材料科学
Corrosion Science Pub Date : 2025-07-19 DOI: 10.1016/j.corsci.2025.113201
Li Li , Zimin Li , Bright O. Okonkwo , Wanqing You , Zhiming Zhang , Lingzhi Zhang , Jianqiu Wang , En-Hou Han
{"title":"Stress corrosion cracking susceptibility and propagation behavior of TC4 titanium alloy in simulated deep-sea environment","authors":"Li Li ,&nbsp;Zimin Li ,&nbsp;Bright O. Okonkwo ,&nbsp;Wanqing You ,&nbsp;Zhiming Zhang ,&nbsp;Lingzhi Zhang ,&nbsp;Jianqiu Wang ,&nbsp;En-Hou Han","doi":"10.1016/j.corsci.2025.113201","DOIUrl":"10.1016/j.corsci.2025.113201","url":null,"abstract":"<div><div>This study investigated the effect of stress intensity factors (K<sub>I</sub>), dissolved oxygen (DO), and hydrostatic pressure (HP) on the stress corrosion cracking (SCC) behavior of commercial TC4 titanium alloy in the simulated marine environment, including both shallow-sea and deep-sea conditions. Experimental results revealed that transgranular SCC and a few intergranular SCC at specific grain boundaries dominated the crack propagation mode. Higher K<sub>I</sub> and DO concentrations accelerate SCC growth rates (SCCGRs), while HP enhances corrosion reactions and hydrogen embrittlement. The mechanisms of the SCC crack propagation in different phases were discussed.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"256 ","pages":"Article 113201"},"PeriodicalIF":7.4,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144670517","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
Whole-life ratchetting of U71Mn rail steel with pre-corrosion damage: Experiments and constitutive modeling U71Mn钢轨钢预腐蚀损伤的全寿命棘轮:实验与本构模型
IF 7.4 1区 材料科学
Corrosion Science Pub Date : 2025-07-16 DOI: 10.1016/j.corsci.2025.113177
Mengzhen Xie , Xiang Xu , Zhenghong Fu , Yanan Hu , Ping Wang , Zefeng Wen , Guozheng Kang , Qianhua Kan
{"title":"Whole-life ratchetting of U71Mn rail steel with pre-corrosion damage: Experiments and constitutive modeling","authors":"Mengzhen Xie ,&nbsp;Xiang Xu ,&nbsp;Zhenghong Fu ,&nbsp;Yanan Hu ,&nbsp;Ping Wang ,&nbsp;Zefeng Wen ,&nbsp;Guozheng Kang ,&nbsp;Qianhua Kan","doi":"10.1016/j.corsci.2025.113177","DOIUrl":"10.1016/j.corsci.2025.113177","url":null,"abstract":"<div><div>Whole-life ratchetting experiments of U71Mn rail steel under different pre-corrosion durations were conducted. The results indicate that the pre-corrosion duration significantly influences the evolution of ratchetting strain and fatigue damage, thereby reducing fatigue life. A damage-coupled model is developed based on experimental observations, which incorporates a novel initial damage evolution equation as a function of pre-corrosion duration. Furthermore, an improved kinematic hardening rule is proposed by extending the Abdel-Karim-Ohno model and introducing an equivalent stress amplitude derived from the stress memory surface and initial damage. Simulated results confirm that the proposed model can effectively reproduce the evolution of ratchetting strain for various pre-corrosion durations. Moreover, the predicted fatigue life remains within a factor-of-two error band. Finally, the effect of pre-corrosion on the evolution of ratchetting and fatigue damage is discussed.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"256 ","pages":"Article 113177"},"PeriodicalIF":7.4,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144655371","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
Precipitate-mediated mechanical-corrosion property trade-offs in TIG-welded Al-3.2Cu-1.48Li alloy joint tig焊接Al-3.2Cu-1.48Li合金接头中沉淀介导的机械腐蚀性能权衡
IF 7.4 1区 材料科学
Corrosion Science Pub Date : 2025-07-16 DOI: 10.1016/j.corsci.2025.113197
Caimei Wang , Ziqun Jiang , Yifeng Zhang , Jiqiang Huang , Feng Han , Long Xue , Yu Zhang
{"title":"Precipitate-mediated mechanical-corrosion property trade-offs in TIG-welded Al-3.2Cu-1.48Li alloy joint","authors":"Caimei Wang ,&nbsp;Ziqun Jiang ,&nbsp;Yifeng Zhang ,&nbsp;Jiqiang Huang ,&nbsp;Feng Han ,&nbsp;Long Xue ,&nbsp;Yu Zhang","doi":"10.1016/j.corsci.2025.113197","DOIUrl":"10.1016/j.corsci.2025.113197","url":null,"abstract":"<div><div>The Al-3.2Cu-1.48Li alloy was joined by tungsten inert gas (TIG) welding using 4505 filler wire. The microstructure, mechanical and corrosion properties of the welded joint were systematically investigated. The fusion zone (FZ) exhibited Cu segregation at grain boundaries. Three distinct heat-affected zone (HAZ) regions were identified. HAZ1 exhibited fine T<sub>1</sub> (Al<sub>2</sub>CuLi) phase, whereas HAZ2 contained coarsened T<sub>1</sub> with discontinuous θ' (Al<sub>2</sub>Cu) phase at grain boundaries. HAZ3 exhibited high density of nanoscale T<sub>1</sub> phase. Microhardness variations correlated strongly with precipitate distributions. HAZ showed hardness fluctuations corresponding to precipitate evolution. FZ softening (77.8 % of base metal (BM) hardness) was inevitable but minimized due to θ' phase strengthening. Tensile fractures consistently initiated at FZ boundaries due to porosity formation in these regions. Intergranular corrosion (IGC) and exfoliation corrosion are used to investigate the corrosion properties of different areas in the welded joint. HAZ3 suffered (the lowest Volta potential) severe IGC due to micro-galvanic effects between T<sub>1</sub> precipitates and Al matrix, and macro-galvanic coupling with other regions. HAZ2 demonstrated reduced IGC sensitivity due to coarse grain boundary precipitates. FZ exhibited superior corrosion resistance due to the cathodic protection from its highest Volta potential. BM and HAZ1 maintained superior corrosion resistance.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"256 ","pages":"Article 113197"},"PeriodicalIF":7.4,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144662689","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
Simultaneous improvement of mechanical properties and corrosion resistance of D019-strengthened high-entropy alloys via tailored microstructures 通过定制组织提高d019强化高熵合金的力学性能和耐蚀性
IF 7.4 1区 材料科学
Corrosion Science Pub Date : 2025-07-16 DOI: 10.1016/j.corsci.2025.113193
Xier Luo , Jianyang Zhang , Tzu-hsiu Chou , Jie Gan , Jiang Ju , Yinghao Zhou , Tao Yang
{"title":"Simultaneous improvement of mechanical properties and corrosion resistance of D019-strengthened high-entropy alloys via tailored microstructures","authors":"Xier Luo ,&nbsp;Jianyang Zhang ,&nbsp;Tzu-hsiu Chou ,&nbsp;Jie Gan ,&nbsp;Jiang Ju ,&nbsp;Yinghao Zhou ,&nbsp;Tao Yang","doi":"10.1016/j.corsci.2025.113193","DOIUrl":"10.1016/j.corsci.2025.113193","url":null,"abstract":"<div><div>To develop corrosion-resistant alloys with superior mechanical properties, we have successfully designed a novel D0<sub>19</sub>-strengthened high-entropy alloy (HEA) with tailored microstructures. By introducing dispersive granular D0<sub>19</sub> phases, the directional lamellar and granular structured (DLGS) alloy showed improved mechanical properties (from 420 to 870 MPa) and nobler pitting potentials (from 183 to 384 mV<sub>SCE</sub>) than the traditional non-directional lamellar structured (NDLS) D0<sub>19</sub>-strengthened counterpart. We found that the increased localized corrosion resistance of DLGS alloy was attributed to the higher content of Cr<sub>2</sub>O<sub>3</sub> and Fe<sub>2</sub>O<sub>3</sub> in the passive film and a lower tendency of galvanic corrosion. Meanwhile, the expanded proportion of hydroxides within the passive film and the rapid dissolution kinetics in the transpassive region increased the pitting susceptibility of the NDLS alloy.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"256 ","pages":"Article 113193"},"PeriodicalIF":7.4,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144665852","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
Mechanisms of water chemistry on oxide microstructures in zirconium alloy corrosion: A comparative study via PED-EELS 水化学对锆合金腐蚀中氧化物微观结构的影响机制:基于PED-EELS的比较研究
IF 7.4 1区 材料科学
Corrosion Science Pub Date : 2025-07-16 DOI: 10.1016/j.corsci.2025.113189
Qingdong Liu , Fengxin Zheng , Jianchao Peng , Jing Hu , Qifeng Zeng , Yi Zhao , Jianfeng Gu , Hiroaki Abe
{"title":"Mechanisms of water chemistry on oxide microstructures in zirconium alloy corrosion: A comparative study via PED-EELS","authors":"Qingdong Liu ,&nbsp;Fengxin Zheng ,&nbsp;Jianchao Peng ,&nbsp;Jing Hu ,&nbsp;Qifeng Zeng ,&nbsp;Yi Zhao ,&nbsp;Jianfeng Gu ,&nbsp;Hiroaki Abe","doi":"10.1016/j.corsci.2025.113189","DOIUrl":"10.1016/j.corsci.2025.113189","url":null,"abstract":"<div><div>The corrosion behaviors of a Zr-0.45 Sn-0.38 Nb-0.30 Fe-0.05 Cu-0.015 Si-0.13 O alloy (wt%) was studied after exposure for 300 days in 360 ℃/18.6 MPa pure water, lithiated water and dissolved oxygen (DO) water, respectively. Transmission electron microscopy (TEM) with precession electron diffraction (PED) and electron energy loss spectroscopy (EELS) revealed critical differences in oxide microstructure, texture, and compositional variants across the oxide/metal (O/M) interface. Results demonstrate that Li⁺ induces premature corrosion transition by disrupting columnar grain morphology, increasing grain boundary density, and therefore accelerating O<sup>2-</sup> diffusion. In contrast, DO significantly enhanced initial corrosion rate, leading to distorted oxide grains and weakened texture due to rapid oxide growth. Hexagonal ZrO (h-ZrO) suboxide layer at the O/M interface were observed in both lithiated and DO water oxide, with their formation linked to corrosion stage and stress level. Stress-driven texture evolution exhibited periodicity in pure and lithiated water oxides but was absent in DO water due to high grain distortion and suppressed corrosion transition. These findings highlight the critical roles of water chemistry and stress in governing zirconium alloy corrosion mechanisms, offering insights for optimizing nuclear fuel cladding performance in water-cooled reactors.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"256 ","pages":"Article 113189"},"PeriodicalIF":7.4,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144655368","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 effect of pH agents on corrosion and low cycle fatigue behaviors of 316L stainless steel in boron-free small modular reactor environments pH剂对316L不锈钢在无硼小型模块化反应器环境下腐蚀和低周疲劳行为的影响
IF 7.4 1区 材料科学
Corrosion Science Pub Date : 2025-07-16 DOI: 10.1016/j.corsci.2025.113196
Hasan Izhar Khan, Hyeon Bae Lee, Changheui Jang
{"title":"The effect of pH agents on corrosion and low cycle fatigue behaviors of 316L stainless steel in boron-free small modular reactor environments","authors":"Hasan Izhar Khan,&nbsp;Hyeon Bae Lee,&nbsp;Changheui Jang","doi":"10.1016/j.corsci.2025.113196","DOIUrl":"10.1016/j.corsci.2025.113196","url":null,"abstract":"<div><div>Recently, boron-free primary coolant environments have been incorporated into several small modular reactor (SMR) designs, replacing the typical pressurized water reactor (PWR) chemistry based on LiOH and boric acid. In these boron-free SMRs, KOH and NH<sub>3</sub> are considered as alternative pH control agents to replace LiOH. Nonetheless, austenitic stainless steels continue to be widely used as structural materials, as in PWRs, and thus, the assessment of corrosion-related damage in alternative pH agent environments is necessary. This study investigates the corrosion and low-cycle fatigue (LCF) behaviors of 316 L SS in boron-free SMR environments with KOH and NH<sub>3</sub>. Results indicate that the corrosion and LCF behaviors of 316 L SS in these alternative pH agents are comparable to those in the PWR environment. The corrosion and crack tip oxide layer thickness vary between the two test environments, though the behavior of constituent elements remained similar. A comparison of microstructural and mechanical properties among the two tested environments, with the LiOH environment from the literature, is further discussed.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"256 ","pages":"Article 113196"},"PeriodicalIF":7.4,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144670515","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
Enhancing corrosion resistance of Ti-coated SUS316L bipolar plates: The role of residual stress and microstructural evolution 增强ti包覆SUS316L双极板的耐蚀性:残余应力和显微组织演变的作用
IF 7.4 1区 材料科学
Corrosion Science Pub Date : 2025-07-16 DOI: 10.1016/j.corsci.2025.113194
Haechan Jo , Hyorin Moon , Jeongsoo Kim , Dongwoo Lee
{"title":"Enhancing corrosion resistance of Ti-coated SUS316L bipolar plates: The role of residual stress and microstructural evolution","authors":"Haechan Jo ,&nbsp;Hyorin Moon ,&nbsp;Jeongsoo Kim ,&nbsp;Dongwoo Lee","doi":"10.1016/j.corsci.2025.113194","DOIUrl":"10.1016/j.corsci.2025.113194","url":null,"abstract":"<div><div>Enhancing the corrosion resistance of bipolar plates (BPPs) is crucial for improving the durability and efficiency of proton exchange membrane water electrolyzers (PEMWEs). This study investigates the impact of processing conditions on the microstructure, mechanical properties, and corrosion behavior of magnetron sputter deposited titanium (Ti) thin films on SiN<sub>x</sub>/Si and SUS316L substrates. Deposition temperature significantly affected the grain structure and phase transitions, with higher temperatures promoting the formation of a dense HCP phase with improved crystallinity. For Ti films deposited on SUS316L, the thermal expansion mismatch between the film and the substrate induces compressive residual stress in the Ti film, resulting in densification, reduced defect density, and enhanced resistance to plastic deformation and ion infiltration. Ti coatings deposited at elevated temperatures exhibited up to a 60 % increase in pitting potential compared to room-temperature deposited films, highlighting the role of stress-induced densification in mitigating crack formation. By establishing correlations between microstructure, mechanical properties, and corrosion resistance, this study provides insights into optimizing deposition processes and stress management strategies for durable coatings in PEMWEs.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"256 ","pages":"Article 113194"},"PeriodicalIF":7.4,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144662688","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 alternating hydrostatic pressure (AHP) on the corrosion and tribocorrosion behavior of gradient W-DLC coated WC-based cermet 交变静水压力对梯度W-DLC涂层wc基陶瓷腐蚀和摩擦腐蚀行为的影响
IF 7.4 1区 材料科学
Corrosion Science Pub Date : 2025-07-15 DOI: 10.1016/j.corsci.2025.113190
Yingpeng Zhang , Yalan Zhang , Lei Li , Hao Li , Peng Guo , Aiying Wang
{"title":"Effect of alternating hydrostatic pressure (AHP) on the corrosion and tribocorrosion behavior of gradient W-DLC coated WC-based cermet","authors":"Yingpeng Zhang ,&nbsp;Yalan Zhang ,&nbsp;Lei Li ,&nbsp;Hao Li ,&nbsp;Peng Guo ,&nbsp;Aiying Wang","doi":"10.1016/j.corsci.2025.113190","DOIUrl":"10.1016/j.corsci.2025.113190","url":null,"abstract":"<div><div>Marine hydraulic components (e.g., seawater piston pumps) continuously endure coupled high hydrostatic pressure, electrochemical corrosion, and tribological degradation during prolonged operation, significantly compromising equipment stability and longevity. While WC-20Cr<sub>3</sub>C<sub>2</sub>-7Ni/W-DLC (WC/W-DLC) duplex coatings demonstrate improved tribocorrosion resistance for metal substrates, their long-term performance under extreme deep-sea conditions remains insufficiently characterized, particularly regarding high-pressure tribocorrosion mechanisms. In this work, the long-term corrosion and tribocorrosion properties of the coatings were evaluated using an autoclave equipped with an in-situ electrochemical monitoring system in a 20 MPa alternating hydrostatic pressure (AHP) environment. The results showed that the corrosion resistance of the WC/W-DLC coating was always superior to that of the WC-based coating during AHP cyclic immersion. It was attributed to the barrier of the structurally stable W-DLC layer against the corrosive solution and Cl-adsorption. The tribocorrosion results after AHP cycling revealed that the bonding between WC grains was weakened due to the corrosion of the Ni binder phase. Therefore, WC grains were pulled out and exfoliated during the sliding process, causing relatively severe failure of the WC-based coating. In contrast, the duplex coating, featuring a structurally stable and strongly bonded W-DLC layer, exhibited a coefficient of friction (COF) and wear rate of only 0.067 and 4.71 × 10<sup>−8</sup> mm<sup>3</sup>/N·m after sliding for 1200 m. Additionally, the potential drop induced by sliding was only 5 mV, significantly lower than that of the WC-based coating (↓159 mV). In short, the optimized WC/W-DLC duplex coating can provide excellent and consistent surface protection for metal parts in deep-sea environments.</div></div>","PeriodicalId":290,"journal":{"name":"Corrosion Science","volume":"256 ","pages":"Article 113190"},"PeriodicalIF":7.4,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144655362","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
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