Materials and Corrosion-werkstoffe Und Korrosion最新文献

{"title":"Study on Corrosion Behavior and Mechanisms of Three B10 Cu–Ni Alloys in Static Immersion","authors":"Dandan Sun,&nbsp;Caichang Dong,&nbsp;Bo Zhang,&nbsp;Bing Han,&nbsp; Wanghaizhou","doi":"10.1002/maco.70153","DOIUrl":"https://doi.org/10.1002/maco.70153","url":null,"abstract":"<div>\u0000 \u0000 <p>The development of high-performance copper–nickel alloys is a critical requirement for the stable operation of seawater pipelines in ships. However, the insufficient corrosion resistance of existing B10 materials limits their application in equipment. This paper compares the corrosion behavior differences of three copper–nickel alloy tubes during static immersion using XRF, EBSD, WLI, SEM, FIB, and electrochemical data. The results indicate that continuous and larger cracks within the film reduce the material's corrosion resistance compared to the thickness of the corrosion product film. In the early stages of corrosion, the inherent corrosion resistance of the matrix (alloy element content) is the key factor influencing corrosion behavior. As the soaking time increases, good surface smoothness and film adhesion are crucial for maintaining stable corrosion resistance.</p></div>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"77 8","pages":"1278-1297"},"PeriodicalIF":2.1,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148667189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of Different Surfactants (PEG/CTAB and Their Combinations) on Corrosion Resistance of Ni-P-Si3N4 Composite Coatings","authors":"Zhixin Chen,&nbsp;Jinrong Duan,&nbsp;Jiafen Wang,&nbsp;Fang Si,&nbsp;Yunlong Wu,&nbsp;Yanyan Song","doi":"10.1002/maco.70144","DOIUrl":"https://doi.org/10.1002/maco.70144","url":null,"abstract":"<div>\u0000 \u0000 <p>In this paper, the effects of surfactants such as PEG, CTAB and their combination (PEG: CTAB) on the microstructure and corrosion resistance of Ni-P-Si₃N₄ composite coating were systematically studied. The electrochemical test shows that adding PEG or CTAB can reduce the coating defects and improve the corrosion resistance. When PEG and CTAB are used in combination, they show synergistic effect, which further enhances the compactness and corrosion protection of the coating. Among them, when the composite ratio is 3:1 (CTAB: PEG), the corrosion current density is significantly reduced, and the stability of the coating in corrosive medium is improved.</p></div>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"77 8","pages":"1346-1356"},"PeriodicalIF":2.1,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148667373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Re or W Addition on the Oxidation Behaviour of a Compositionally Complex Ta–Mo–Cr–Ti–Al Alloy in Air at 1000°C","authors":"Björn Schäfer,&nbsp;Michael Dürrschnabel,&nbsp;Carsten Schroer,&nbsp;Fabian Lanoy,&nbsp;Emma White,&nbsp;Mathias Galetz,&nbsp;Chongchong Tang,&nbsp;Bronislava Gorr","doi":"10.1002/maco.70147","DOIUrl":"https://doi.org/10.1002/maco.70147","url":null,"abstract":"<p>Presuming that doping of protective (Cr,Ta,Ti)O₂ with cations of +5 or higher valence further improves the oxidation resistance of Ta–Mo–Cr–Ti–Al, the effect of 3 at.% of Re or W in otherwise equimolar Ta–Mo–Cr–Ti–Al is investigated in oxidation tests performed at 1000°C in air. Both minor additions indeed decrease the parabolic mass gain (72 h), which for W also manifests in reduced thickness of oxide layers and zone of internal corrosion that persists for at least 100 h. Besides the hypothesised doping, other factors that may explain the effect of Re or W are discussed. A general finding of the analytical work is the identification of (Ti,Ta)O₂ with Mo inclusions underneath the inward growing (Cr,Ta,Ti)O₂ layer.</p>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"77 8","pages":"1222-1233"},"PeriodicalIF":2.1,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/maco.70147","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148667413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"MOF-5@Phen@Chitosan/EP Coating: A Smart Dual-Functionality Self-Reporting and Corrosion-Inhibiting Coating for Identifying and Suppressing Early Steel Corrosion","authors":"Botao Zhao,&nbsp;Hui Zeng,&nbsp;Jin Yang,&nbsp;Hailong Zhang,&nbsp;Qingjun Zhu,&nbsp;Ruiyong Zhang","doi":"10.1002/maco.70155","DOIUrl":"https://doi.org/10.1002/maco.70155","url":null,"abstract":"<div>\u0000 \u0000 <p>Steel corrosion beneath protective coatings remains a major threat to infrastructure safety, creating a need for coating that provide early warning and active inhibition. In this study, a multifunctional self-reporting and anti-corrosion coating system (MPC) is fabricated using MOF-5 loaded with 1,10-phenanthroline (Phen) and encapsulated within chitosan shells, enabling pH-responsive release. Physicochemical, spectroscopic, and electrochemical analyses confirm successful Phen loading (25.06–29.70 wt.%), controlled release behavior, and dual functions of visible self-reporting and corrosion inhibition. CLSM and Raman measurements further verify the formation of Fe(Phen)₃²⁺ at corrosion sites and the suppression of Fe ion. EIS shows that a 5 wt.% MPC coating achieves a 342% impedance increase compared with neat epoxy after 42 days in 3.5 wt.% NaCl solution. Salt-spray and immersion tests further demonstrate real-time visual corrosion indication and long-term protection. This work presents an effective strategy for integrating colorimetric reporting and active inhibition in MOF-based intelligent coatings for early-stage corrosion detection and suppression.</p></div>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"77 8","pages":"1357-1374"},"PeriodicalIF":2.1,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148667422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on Corrosion Behavior and Mechanisms of Three B10 Cu–Ni Alloys in Static Immersion","authors":"Dandan Sun,&nbsp;Caichang Dong,&nbsp;Bo Zhang,&nbsp;Bing Han,&nbsp; Wanghaizhou","doi":"10.1002/maco.70153","DOIUrl":"https://doi.org/10.1002/maco.70153","url":null,"abstract":"<div>\u0000 \u0000 <p>The development of high-performance copper–nickel alloys is a critical requirement for the stable operation of seawater pipelines in ships. However, the insufficient corrosion resistance of existing B10 materials limits their application in equipment. This paper compares the corrosion behavior differences of three copper–nickel alloy tubes during static immersion using XRF, EBSD, WLI, SEM, FIB, and electrochemical data. The results indicate that continuous and larger cracks within the film reduce the material's corrosion resistance compared to the thickness of the corrosion product film. In the early stages of corrosion, the inherent corrosion resistance of the matrix (alloy element content) is the key factor influencing corrosion behavior. As the soaking time increases, good surface smoothness and film adhesion are crucial for maintaining stable corrosion resistance.</p></div>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"77 8","pages":"1278-1297"},"PeriodicalIF":2.1,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148667188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Failure Investigation of Alloy 625 Sockolets After Prolonged Service in an Ammonia Cracker Unit","authors":"Kamlesh Chandra,&nbsp;N. Naveen Kumar,&nbsp;Niraj Kumar","doi":"10.1002/maco.70143","DOIUrl":"https://doi.org/10.1002/maco.70143","url":null,"abstract":"<p>Several sockolets of Alloy 625 operating at 540°C in contact with ammonia gas in a heavy water production plant showed cracking after 115,000 h of service-life. A sockolet is a branch connection used to connect a smaller branch pipe to a larger main pipe. A failure investigation was done to identify the root cause of failure; it involved microstructural examination, fractography, hardness measurement, and X-ray diffraction analysis. During service, the sockolet material developed a hard and brittle surface nitrided layer (40–65 µm), composed mainly of chromium nitride. The hardness of the nitrided layer was 1300 HV_0.2 as opposed to the hardness of 430 HV_0.2 for the base alloy. The failure of the sockolets was caused by intergranular cracking and fracture. The thick and highly brittle nitrided layer formed intergranular surface cracks, which propagated along grain boundaries into the base alloy substrate due to the presence of brittle Cr-rich carbides.</p>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"77 8","pages":"1375-1384"},"PeriodicalIF":2.1,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/maco.70143","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148667215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cover Picture: Materials and Corrosion. 8/2026","authors":"","doi":"10.1002/maco.70205","DOIUrl":"https://doi.org/10.1002/maco.70205","url":null,"abstract":"<p><b>Cover:</b> Results from TEM investigation of complex oxide layers on TaMoCrTiAl-3W: a) STEM-HAADF image with regions of interest highlighted in blue and red, marking low and high Ti4+ content, respectively. b) STEM-EDX spectra, c) EELS spectra including Ti-L, O-K and Cr-L edges, and d) EELS spectra showing the Ta-M edges.</p><p>More detailed information can be found in:</p><p><i>Björn Schäfer, Michael Dürrschnabel, Carsten Schroer, Fabian Lanoy, Emma White, Mathias Galetz, Chongchong Tang, Bronislava Gorr</i>, Effect of Re or W addition on the oxidation behaviour of a compositionally complex Ta–Mo–Cr–Ti–Al alloy in air at 1000 °C, <i>Materials and Corrosion</i> <b>2026</b>, <i>77</i>, 1222.\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"77 8","pages":""},"PeriodicalIF":2.1,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/maco.70205","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148667355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Anaerobic Corrosion Phenomena of Cast Iron and Copper in Artificial Groundwater at Elevated Temperature","authors":"Louisa Panjiyar,&nbsp;Martin Ende,&nbsp;Christiane Stephan-Scherb","doi":"10.1002/maco.70154","DOIUrl":"https://doi.org/10.1002/maco.70154","url":null,"abstract":"<p>The material choice for the canister for the deep geological repository of high-level nuclear waste is a crucial aspect for long-term safety of the repository. In the presented study, the impact of salinity of water in a bentonite slurry on the corrosion behavior of cast iron with spheroidal graphite and copper was investigated. The metal coupons were exposed under anoxic conditions at 60°C for 4 months in a bentonite suspension prepared with artificial water representing Opalinus clay pore water chemistry with different salinity and a water with hydrochemistry from a crystalline host rock in Germany. Light-optical microscopy, µ-Xray fluorescence, X-ray diffraction, µ-Raman spectroscopy and scanning electron microscopy was applied to investigate the corrosion mechanisms on varying length scales. After exposure, cast iron with spheroidal graphite shows an increase in material degradation with higher salinity of the artificial water. The thickness of the Cu₂O layer increases with lower salinity. Despite the difference in material chemistry, the results suggest a general dependence of the corrosion process on salinity of the electrolyte in a bentonite slurry.</p>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"77 8","pages":"1262-1277"},"PeriodicalIF":2.1,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/maco.70154","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148667423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Mechanistic Model for Predicting Top-of-the-Line Corrosion in CO2/H2S Environments: Validation and Field Application","authors":"Farnoosh Khoshandam,&nbsp;Mehdi Javidi","doi":"10.1002/maco.70156","DOIUrl":"https://doi.org/10.1002/maco.70156","url":null,"abstract":"<div>\u0000 \u0000 <p>This study develops a mechanistic model to predict top-of-the-line corrosion (TLC) in wet natural gas pipelines under sweet (CO₂) and sour (CO₂/H₂S) conditions. The framework incorporates water condensation, CO₂–H₂S–organic acid aqueous speciation, electrochemical kinetics, and corrosion product film formation, emphasizing rapid FeS precipitation in sour service. The proposed sour model reproduced published laboratory data with a mean absolute deviation &lt; 45% across gas compositions (<span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 \u0000 <mrow>\u0000 <msub>\u0000 <mi>p</mi>\u0000 \u0000 <msub>\u0000 <mi>CO</mi>\u0000 \u0000 <mn>2</mn>\u0000 </msub>\u0000 </msub>\u0000 </mrow>\u0000 </mrow>\u0000 </semantics></math>:2-10 bar, <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 \u0000 <mrow>\u0000 <msub>\u0000 <mi>p</mi>\u0000 \u0000 <mrow>\u0000 <msub>\u0000 <mi>H</mi>\u0000 \u0000 <mn>2</mn>\u0000 </msub>\u0000 \u0000 <mi>S</mi>\u0000 </mrow>\u0000 </msub>\u0000 </mrow>\u0000 </mrow>\u0000 </semantics></math>:0-2 bar), wall temperatures (15°C–75°C), condensation rates (0.002–0.25 ml/m²·s), and organic acid concentrations (0–1300 ppm), while the deviation for sweet service was &lt; 16%. The sour TLC model applied to two offshore sour natural gas transmission pipelines showed strong agreement with in-line inspection data. Field simulations indicate that the highest sour TLC rates occur at steel surface temperatures of 20°C–35°C, with a maximum corrosion rate of 0.9 mm/year. High condensation rates alone do not cause TLC; significant corrosion can occur even at low condensation rates (0.00002–0.15 g/m²·s). This work establishes one of the first unified mechanistic framework for predicting sour TLC.</p></div>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"77 8","pages":"1298-1320"},"PeriodicalIF":2.1,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148667288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"MOF-5@Phen@Chitosan/EP Coating: A Smart Dual-Functionality Self-Reporting and Corrosion-Inhibiting Coating for Identifying and Suppressing Early Steel Corrosion","authors":"Botao Zhao,&nbsp;Hui Zeng,&nbsp;Jin Yang,&nbsp;Hailong Zhang,&nbsp;Qingjun Zhu,&nbsp;Ruiyong Zhang","doi":"10.1002/maco.70155","DOIUrl":"https://doi.org/10.1002/maco.70155","url":null,"abstract":"<div>\u0000 \u0000 <p>Steel corrosion beneath protective coatings remains a major threat to infrastructure safety, creating a need for coating that provide early warning and active inhibition. In this study, a multifunctional self-reporting and anti-corrosion coating system (MPC) is fabricated using MOF-5 loaded with 1,10-phenanthroline (Phen) and encapsulated within chitosan shells, enabling pH-responsive release. Physicochemical, spectroscopic, and electrochemical analyses confirm successful Phen loading (25.06–29.70 wt.%), controlled release behavior, and dual functions of visible self-reporting and corrosion inhibition. CLSM and Raman measurements further verify the formation of Fe(Phen)₃²⁺ at corrosion sites and the suppression of Fe ion. EIS shows that a 5 wt.% MPC coating achieves a 342% impedance increase compared with neat epoxy after 42 days in 3.5 wt.% NaCl solution. Salt-spray and immersion tests further demonstrate real-time visual corrosion indication and long-term protection. This work presents an effective strategy for integrating colorimetric reporting and active inhibition in MOF-based intelligent coatings for early-stage corrosion detection and suppression.</p></div>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"77 8","pages":"1357-1374"},"PeriodicalIF":2.1,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148667384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}