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Cover Picture: Materials and Corrosion. 12/2024 封面图片:材料与腐蚀。12/2024
IF 1.6 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2024-12-04 DOI: 10.1002/maco.202470115
Katharina Beck, Till König, Ekin Senvardarli, Frauke Hinrichs, Martin Heilmaier, Mathias C. Galetz

Cover:

BSE image of the oxides and corrosion products formed on the eutectoid alloy Mo-21.0Si-34.0Ti after hot corrosion at 700 in synthetic air + 0.1% SO2 for 24 h.

More detailed information can be found in:

Katharina Beck, Till König, Ekin Senvardarli, Frauke Hinrichs, Martin Heilmaier, Mathias C. Galetz, Hot Corrosion Behavior of Mo-Si-Ti Alloys, Materials and Corrosion 2024, 75, 1610.

封面:共析合金Mo-21.0Si-34.0Ti在合成空气+ 0.1% SO2中700℃热腐蚀24 h后形成的氧化物和腐蚀产物的BSE图像。更多详细信息可找到:Katharina Beck, Till König, Ekin Senvardarli, Frauke Hinrichs, Martin Heilmaier, Mathias C. Galetz, Mo-Si-Ti合金的热腐蚀行为,材料与腐蚀2024,75,1610。
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引用次数: 0
Contents: Materials and Corrosion. 12/2024 内容:材料与腐蚀。12/2024
IF 1.6 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2024-12-04 DOI: 10.1002/maco.202470117
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引用次数: 0
Masthead: Materials and Corrosion. 12/2024 报头:材料与腐蚀。12/2024
IF 1.6 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2024-12-04 DOI: 10.1002/maco.202470116
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引用次数: 0
Effects of Reduction-Oxidation Cycles on the Structure, Heat and Corrosion Resistance of Haynes 282 Nickel Alloy Manufactured by Using Powder Bed Fusion-Laser Beam Method
IF 1.6 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2024-11-24 DOI: 10.1002/maco.202414477
Janusz Kamiński, Bogusława Adamczyk-Cieślak, Mateusz Kopec, Andrzej Kosiński, Ryszard Sitek

The study investigated the effect of the oxidation–reduction cycles on the structure and corrosion resistance of the Haynes 282 nickel superalloy at ambient and elevated temperatures. The comparative studies were performed on specimens produced by the Powder Bed Fusion-Laser Beam (PBF-LB) process and those in the as-received state. The microstructure of the PBF-LB specimens was studied using optical and scanning electron microscopy, whereas the chemical composition of the scale formed after isothermal oxidation in an air atmosphere at 750°C was analysed using energy-dispersive X-ray spectroscopy and X-ray Photoelectron Spectroscopy. The phase composition of the formed scale was determined by X-ray diffraction. Laboratory-induced hydrogen atmosphere was adopted through cathodic charging. A comparison of corrosion resistance was carried out on two types of Haynes 282 specimens, before and after the oxidation and cathodic charging processes. It was found that PBF-LB process could be effectively used to manufacture Haynes 282 nickel superalloy with low porosity and a fine crystalline microstructure. The low-porous, fine-crystalline microstructure of the tested specimens produced by the PBF-LB technique exhibited good resistance to electrochemical corrosion, slightly lower than wrought Haynes 282 nickel superalloy specimens.

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引用次数: 0
A Detailed Review of Numerical Modeling of Flow Accelerated Corrosion: Challenges and Opportunities for the Future
IF 1.6 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2024-11-22 DOI: 10.1002/maco.202414625
Yazan Meri, Osman Siddiqui, Ihsan ulhaq Toor, Afaque Shams

Flow-accelerated corrosion (FAC) is a complex phenomenon that poses a significant threat to the integrity of piping and fittings in power plants, affecting infrastructure protection and power production reliability. The presence of corrosive substances in the fluid and elevated flow velocity and temperature leads to increased material loss in piping and equipment. Understanding the intricate relationship among the contributing factors such as flow dynamics, environmental factors, and corrosion reactions is essential for developing effective prediction and mitigation strategies. This review discusses the recent advancements in the numerical modeling of FAC using computational fluid dynamics (CFD). The numerical models presented show abilities to predict FAC profiles across multiple power plant components, and a review was conducted on the evaluation of these predictions with experimental measurements. Notably, increased turbulence in the flow significantly contributed to prediction errors, emphasizing the need for advanced turbulence models in numerical simulations of FAC. Addressing these challenges is crucial for maintaining sustainable infrastructure and reducing industrial risks through enhanced predictive maintenance strategies.

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引用次数: 0
Formation and Evolution of Corrosion Products on Eutectic Microstructures: A Novel Study to Understand Corrosion Protection of Zn–Al–Mg Coatings
IF 1.6 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2024-11-14 DOI: 10.1002/maco.202414474
Jiashun Zhou, Youbin Wang, Yongkun Li, Zhengbing Xu, Kezhun He, Zhaodong Wang

Zn–Al–Mg coatings contain Zn phase and Zn/Mg–Zn, Zn/Al, and Zn/Al/Mg–Zn eutectics. The formation and evolution of corrosion products on different eutectics that affect the corrosion resistance of Zn–Al–Mg coatings require further exploration. In this work, the formation and evolution of corrosion products on different microstructures were investigated. The results show that while the corrosion products on different microstructures are mainly Zn5(OH)8Cl2, the phase composition and morphology of corrosion products vary significantly. These differences in corrosion products on each microstructure were discussed in detail. The corrosion protective properties of corrosion products on different microstructures were compared. The protective properties of corrosion products are closely related to the content and morphology of Zn5(OH)8Cl2 and Zn6Al2(OH)16CO3. The corrosion products on Zn/Al/Mg2Zn11 eutectic are the finest and densest, with high content of Zn5(OH)8Cl2 and Zn6Al2(OH)16CO3, showing good protective performance. Increasing the content of Zn/Al/Mg–Zn eutectic to enhance the corrosion resistance of Zn–Al–Mg coatings should be considered in the subsequent work.

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引用次数: 0
Study of Global Seawater Corrosivity Classification Based on Marine Environmental Factors Data
IF 1.6 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2024-11-13 DOI: 10.1002/maco.202414612
Penghui Zhang, Shaotong Liu, Kangkang Ding, Shuai Wu, Lin Fan

To evaluate the global seawater corrosivity and ensure the service safety of marine equipment, the methods of seawater corrosivity classification, which contained the standard metal corrosion rates method and the environmental factors evaluation method, are proposed and then applied to the seawater corrosivity classification in typical China seas. By comparing the results from both methods, the feasibility of the environmental factors evaluation method based on the grey relational model is verified. Furthermore, with the collection and processing of typical seawater factors data of global ocean, the corrosivity of global seawater is classified into six grades with the corrosion test data of carbon steel as baseline, and its distribution in different months is visualized by means of ArcGIS technology. The results show that the sea areas with high corrosivity are mainly located at equatorial and tropical sea areas, and for carbon steel, seawater temperature was the main influence on seawater corrosivity.

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引用次数: 0
Atypical Attack of the Dissimilar Metal Welds of a Water–Water Energetic Reactor Nuclear Power Plant Secondary Circuit: Possible Mechanisms of Failure
IF 1.6 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2024-11-12 DOI: 10.1002/maco.202414502
Aleš Návoj

Dissimilar metal welds are utilized in the energy industry to connect two materials with different material characteristics. In the case of nuclear power plants, the connected materials tend to be low-alloyed steel and high-alloyed material. Despite different material and corrosion properties, under the proper environmental conditions, the used construction materials and weld metals are protected either by a passive layer or by a high-temperature oxide. Although dissimilar metal welds are used in both primary and secondary circuits, the most frequently documented damage is in the secondary circuit, where, in addition to material heterogeneities, local environmental heterogeneities may form. For dissimilar metal welds in WWER nuclear power plants, a water–water energetic reactor, a subtype of pressure water reactor, we note two main types of attack near the dissimilar fusion boundary: on the carbon steel side or on the high-alloyed weld metal side (X10CrNiMoN16-25-6). The possible causes of the latter “atypical” corrosion attack are debated and can be generalized as a consequence of change of the grain boundary condition.

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引用次数: 0
Study on the Effect of Dry and Wet Cycle Time Ratio on the Corrosion Behavior of 2198 Aluminum–Lithium Alloy
IF 1.6 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2024-11-11 DOI: 10.1002/maco.202414580
Yingyan Liu, Zhibin Deng, Qian Zhang, Xiao Hu, Hang Yue, Haiping Tang, Guotao Li

The corrosion of 2198 aluminum–lithium alloy in a marine atmospheric environment was simulated using a wet–dry alternating experimental setup. Weight-loss measurement methods, electrochemical impedance spectroscopy (EIS), scanning electron microscopy/energy-dispersive spectroscopy (SEM/EDS), macroscopic morphology testing, three-dimensional morphology testing, and X-ray photoelectron spectroscopy (XPS) were used to study the wet–dry alternating corrosion behaviors and mechanisms of 2198 aluminum–lithium alloys under simulated marine atmospheric environment. The results indicate that corrosion weight loss increases with decreasing wet-to-dry ratios, accompanied by an increase in the corrosion rate. Various data suggest that the primary corrosion products are composed of Al2O3, AlO(OH), and AlCl3. The reduction in the wet-to-dry ratio leads to the enrichment of Cl⁻ within the corrosion products, extending the contact time between the substrate and the medium, thereby intensifying the hydrolysis of Al³⁺. This exacerbates the dissolution at pitting sites, which in turn erodes and breaks down the corrosion product film, accelerating the overall corrosion process.

{"title":"Study on the Effect of Dry and Wet Cycle Time Ratio on the Corrosion Behavior of 2198 Aluminum–Lithium Alloy","authors":"Yingyan Liu,&nbsp;Zhibin Deng,&nbsp;Qian Zhang,&nbsp;Xiao Hu,&nbsp;Hang Yue,&nbsp;Haiping Tang,&nbsp;Guotao Li","doi":"10.1002/maco.202414580","DOIUrl":"https://doi.org/10.1002/maco.202414580","url":null,"abstract":"<div>\u0000 \u0000 <p>The corrosion of 2198 aluminum–lithium alloy in a marine atmospheric environment was simulated using a wet–dry alternating experimental setup. Weight-loss measurement methods, electrochemical impedance spectroscopy (EIS), scanning electron microscopy/energy-dispersive spectroscopy (SEM/EDS), macroscopic morphology testing, three-dimensional morphology testing, and X-ray photoelectron spectroscopy (XPS) were used to study the wet–dry alternating corrosion behaviors and mechanisms of 2198 aluminum–lithium alloys under simulated marine atmospheric environment. The results indicate that corrosion weight loss increases with decreasing wet-to-dry ratios, accompanied by an increase in the corrosion rate. Various data suggest that the primary corrosion products are composed of Al<sub>2</sub>O<sub>3</sub>, AlO(OH), and AlCl<sub>3</sub>. The reduction in the wet-to-dry ratio leads to the enrichment of Cl⁻ within the corrosion products, extending the contact time between the substrate and the medium, thereby intensifying the hydrolysis of Al³⁺. This exacerbates the dissolution at pitting sites, which in turn erodes and breaks down the corrosion product film, accelerating the overall corrosion process.</p></div>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"76 3","pages":"446-458"},"PeriodicalIF":1.6,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143554865","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}
引用次数: 0
Cover Picture: Materials and Corrosion. 11/2024 封面图片:材料与腐蚀。11/2024
IF 1.6 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2024-11-04 DOI: 10.1002/maco.202470111
Wei Zhang, Mingyang Zhou, Huifang Yue, Danmin Peng, Xi Qiu, Jijun Yang

Cover:

Surface morphology of the coatings corroded at 650 °C for 500 h. (a) – (a3) Fe15Cr11Al2Si coating; (b) – (b3) Fe15Cr11Al0.5Y coating; (c) – (c3) Fe15Cr11Al2Si0.5Y coating. The red numbers represent the position of the elemental point analysis.

Wei Zhang, Mingyang Zhou, Huifang Yue, Danmin Peng, Xi Qiu, Jijun Yang, Effect of heat treatment on the microstructure, LBE corrosion resistance, and bonding strength of the FeCrAl-based coatings, Materials and Corrosion 2024, 75, 1406.

封面:在 650 °C 下腐蚀 500 h 的涂层表面形貌。(a)-(a3)Fe15Cr11Al2Si 涂层;(b)-(b3)Fe15Cr11Al0.5Y 涂层;(c)-(c3)Fe15Cr11Al2Si0.5Y 涂层。红色数字代表元素点分析的位置。Wei Zhang, Mingyang Zhou, Huifang Yue, Danmin Peng, Xi Qiu, Jijun Yang, Effect of heat treatment on the microstructure, LBE corrosion resistance, and bonding strength of the FeCrAl-based coatings, Materials and Corrosion 2024, 75, 1406.
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Materials and Corrosion-werkstoffe Und Korrosion
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