Materials and Corrosion-werkstoffe Und Korrosion最新文献

{"title":"Microstructure and Electrochemical Corrosion Behavior of Vacuum-Cladded FeNiCoCrMoBSi High-Entropy Alloy Coating","authors":"Fang Xie,&nbsp;Changsheng Zhai,&nbsp;Xi Zhang,&nbsp;Sainan Jiang,&nbsp;Xin Zhang,&nbsp;Hongxing Zheng,&nbsp;Xijin Hua","doi":"10.1002/maco.202414520","DOIUrl":"https://doi.org/10.1002/maco.202414520","url":null,"abstract":"<div>\u0000 \u0000 <p>The microstructure and electrochemical corrosion performance of vacuum cladding FeNiCoCrMoBSi HEA coatings were investigated. The results show that the coating forms an FCC+σ eutectic structure. The FCC matrix phase has an abalone crystal structure. The diffraction angle of the FCC crystal plane (111) is positively correlated with the remelting temperature, while its diffraction peak intensity and grain size are inversely correlated. Unlike the coatings obtained at remelting temperatures of 1150°C and 1230°C, where the σ phase is a Mo poor phase, the coating obtained at the remelting temperature of 1190°C has a Mo-rich phase. The coating has the lowest self-corrosion current density (3.31 μA/cm²), the highest self-corrosion potential (−0.3797 V), the highest polarization impedance (69 616 Ω), and impedance modulus (23 205.68 W cm²). Its impedance modulus is 2.89 times and 2.04 times higher than those of the coatings remelted at 1150°C and 1230°C, respectively, demonstrating excellent electrochemical corrosion resistance. This can be attributed to the comprehensive effect of various factors, such as FCC+σ dual phases, dense coating structure, and excellent passivation film.</p></div>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"76 5","pages":"661-673"},"PeriodicalIF":1.6,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143909523","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":"Molten Salt Corrosion Studies of Sanicro-25 by Electrochemical Techniques at High Temperature","authors":"Ch. JagadeeswaraRao,&nbsp;Anantha Lakshmi M.,&nbsp;P. V. Suneesh,&nbsp;S. Ningshen","doi":"10.1002/maco.202414476","DOIUrl":"https://doi.org/10.1002/maco.202414476","url":null,"abstract":"<div>\u0000 \u0000 <p>Nickel and chromium-based alloys are being considered structural materials for crucibles for electrorefining in pyrochemical reprocessing. LiCl–KCl molten salt is used as an electrolyte under an inert argon atmosphere. In the present work, the corrosion behavior of the Sanicro-25 steel exposed to LiCl–KCl molten salt at 500°C with inert argon cover gas was explored using electrochemical methods like open circuit potential (OCP), linear polarization resistance, and electrochemical impedance spectroscopy (EIS). A change in the OCP of Sanicro-25 towards the noble direction was observed. The linear polarization resistance, measured at various exposure intervals, decreased with the increase of molten salt exposure. The Nyquist plot consists of two semi-circles with an incomplete semi-circle at the lower frequency end, indicating the existence of three-time constants and formation of intermittent oxide film. The oxide films formed over the surface are characterized by Raman analysis, X-ray diffraction, X-ray photoelectron spectroscopy, and scanning electron microscope coupled with elemental analysis. The formation of Fe₃O₄, Cr₂O₃, iron hydroxide, W-oxides, and spinels are evidenced.</p></div>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"76 5","pages":"727-737"},"PeriodicalIF":1.6,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143909321","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":"Cover Picture: Materials and Corrosion. 1/2025","authors":"Pranav Vivek Kulkarni,&nbsp;Meet Jaydeepkumar Oza,&nbsp;Anna Igual-Munoz,&nbsp;Jean-Michel Sallese,&nbsp;Moslem Shahverdi,&nbsp;Christian Leinenbach,&nbsp;Stefano Mischler","doi":"10.1002/maco.202570011","DOIUrl":"https://doi.org/10.1002/maco.202570011","url":null,"abstract":"<p><b>Cover:</b></p><p>Confocal laser optical maps of the heat-treated Fe-SMA after polarization in the chloride solution. The as-received sample shows localized corrosion along grain boundaries and dissolution of grains. In the solution-treated sample uniformly distributed pits can be observed on the whole surface. The aged sample shows similar grain boundary deterioration as the asreceived sample, together with the presence of pits inside the grains and grain dissolutions of the smallest grains.</p><p>More detailed information can be found in:</p><p><i>Pranav Vivek Kulkarni, Meet Jaydeepkumar Oza, Anna Igual-Munoz, Jean-Michel Sallese, Moslem Shahverdi, Christian Leinenbach, Stefano Mischler</i>, Corrosion Behavior of Heat-Treated Fe-based Shape Memory Alloys, <i>Materials and Corrosion</i> <b>2025</b>, <i>76</i>, 10.\u0000\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":"76 1","pages":"1"},"PeriodicalIF":1.6,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/maco.202570011","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143114704","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":"Masthead: Materials and Corrosion. 1/2025","authors":"","doi":"10.1002/maco.202570012","DOIUrl":"https://doi.org/10.1002/maco.202570012","url":null,"abstract":"","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"76 1","pages":"3"},"PeriodicalIF":1.6,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/maco.202570012","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143114705","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":"Contents: Materials and Corrosion. 1/2025","authors":"","doi":"10.1002/maco.202570013","DOIUrl":"https://doi.org/10.1002/maco.202570013","url":null,"abstract":"","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"76 1","pages":"4-8"},"PeriodicalIF":1.6,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/maco.202570013","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143114706","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":"Mechanism of Carbon Steel Corrosion in Accelerated Corrosion Tests","authors":"Kateryna Popova,&nbsp;Tomáš Prošek","doi":"10.1002/maco.202414606","DOIUrl":"https://doi.org/10.1002/maco.202414606","url":null,"abstract":"<p>Understanding the effect of parameters of cyclic accelerated corrosion tests on the corrosion response is crucial for proper test design. The real-time corrosion rate of carbon steel was measured using electrical resistance sensors in seven tests and was statistically evaluated. A synergistic effect of the chloride concentration and duration of transition phases was explained based on the surface electrolyte distribution. In contrast to the field, the steel corrosion rate increased between particular chloride deposition phases due to the formation of porous red rust with low protection ability. This implies that the corrosivity of future corrosion tests needs to be reduced.</p>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"76 4","pages":"486-509"},"PeriodicalIF":1.6,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/maco.202414606","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809441","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":"Study on the Hot Corrosion Behavior of Nitrogen-Containing Nickel-Based Cladding Layer in Na2SO4 + NaCl Mixed Salt at 700°C","authors":"Zhixin Yang,&nbsp;Yunhai Su,&nbsp;Shuo Feng,&nbsp;Taisen Yang,&nbsp;Zhiyong Dai,&nbsp;Haoxing Li,&nbsp;Yang Yang","doi":"10.1002/maco.202414651","DOIUrl":"https://doi.org/10.1002/maco.202414651","url":null,"abstract":"<div>\u0000 \u0000 <p>Based on the core idea of replacing Ni with N, this article designs a nitrogen-containing nickel-based alloy powder for plasma cladding. The corrosion behavior of Inconel 625 and the nitrogen-containing nickel-based cladding layer in a mixture of 75% Na₂SO₄ + 25% NaCl at 700°C was studied, and its mechanism was analyzed. The results of corrosion weight loss show that the corrosion weight loss per unit area of Inconel 625 is 2.95 times that of the nitrogen-containing nickel-based alloy. The results of XRD, SEM of surface corrosion and elemental distribution indicate that the phase compositions of Inconel 625 and the nitrogen-containing nickel-based alloy after corrosion are basically the same, all containing Cr₂O₃, NiO, Fe₂O₃, NiCr₂O₄, and Ni₃S₂. NiFe₂O₄ was also detected in the nitrogen-containing nickel-based cladding layer. Through the cross-sectional morphology and elemental distribution after the corrosion of the cladding layer, it can be seen that a chromium-depleted layer appears in Inconel 625 after corrosion, while it was not observed in the nitrogen-containing nickel-based cladding layer. In summary, the corrosion resistance of the nitrogen-containing nickel-based cladding layer to the Na₂SO₄ + NaCl molten salt is better than that of Inconel 625. It can be proved through the corrosion mechanism and XPS that Cr₂O₃ plays a crucial role in it.</p></div>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"76 4","pages":"581-590"},"PeriodicalIF":1.6,"publicationDate":"2025-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809496","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":"The Synergistic Effect of Two Alloying Elements on the Microstructures and Properties of Zn–2.5Al–3Mg Alloys","authors":"Longyue Ma,&nbsp;Wenxuan Chen,&nbsp;Guorong Zhou,&nbsp;Xinying Teng,&nbsp;Shui Yu,&nbsp;Mengmeng Zhang,&nbsp;Jin Sun","doi":"10.1002/maco.202414634","DOIUrl":"https://doi.org/10.1002/maco.202414634","url":null,"abstract":"<div>\u0000 \u0000 <p>The present study investigates the microstructure, hardness, and corrosion behavior of Zn–2.5Al–3Mg alloys with the addition of two elements (Zr–Si, Zr–Sb, and Zr–Ti). This analysis includes SEM/EDS, Brinell hardness testing, electrochemical measurements, and XPS. The SEM results indicate that the Zn–2.5Al–3Mg alloy, with added Zr and Ti elements, exhibits finer grains and a more homogeneous structure compared to the other two combinations (Zr–Si and Zr–Sb). Electrochemical analysis indicated that the Zn–2.5Al–3Mg–0.2(Zr–Ti) alloy exhibited the best corrosion resistance among all the samples tested. Furthermore, XPS identified that the corrosion products of the Zn–2.5Al–3Mg–0.2(Zr–Ti) alloy mainly consist of dense Zn₅(OH)₆(CO₃)₂, ZnAl₂O₄, and MgAl₂O₄. An exploration into the corrosion resistance mechanism of the Zn–2.5Al–3Mg–0.2(Zr–Ti) alloy showed that the dense corrosion products formed during the corrosion process gradually accumulate and fill corrosion gaps. This accumulation hinders the progression of corrosion into the metal, ultimately enhancing the alloy's corrosion resistance.</p></div>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"76 4","pages":"519-532"},"PeriodicalIF":1.6,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809964","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":"Unveiling the Oxidation Behavior of a Binary Mg–Y Alloy","authors":"Jie Li,&nbsp;Haoyu Wang,&nbsp;Fang Yi,&nbsp;Yonghao Gao,&nbsp;Chuming Liu","doi":"10.1002/maco.202414681","DOIUrl":"https://doi.org/10.1002/maco.202414681","url":null,"abstract":"<div>\u0000 \u0000 <p>Magnesium and its alloys are the most promising lightweight metallic materials because of their outstanding mechanical performance. However, Mg alloys have long been criticized for their low oxidation resistance. In this study, the isothermal oxidation of a Mg–Y alloy at 350°C was investigated, and the resulting oxide scale was systematically characterized using an optical microscope, scanning electron microscope (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and other analytical techniques. The findings reveal that isothermal oxidation results in (i) an increase in the average Y content along grain boundaries, from 1.41 to 3.05 at.%, and surface enrichment of Y content from 0.86 to 3.07 at.% after 6 to 48 h of oxidation; (ii) inhomogeneous oxidation caused by microstructural heterogeneity; and (iii) the formation of an oxide scale consisting of a mixture of MgO and oxygen-deficient Y₂O₃ at the oxide/substrate interface, driven by the inward transport of oxygen anions. The molar ratio of MgO to Y₂O₃ was found to vary with oxidation time.</p></div>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"76 5","pages":"711-726"},"PeriodicalIF":1.6,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143909538","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":"The Impact of Humidity on High Temperature Corrosion of Ferritic-Austenitic Model Alloys in the Presence of KCL","authors":"P. Kingsbery,&nbsp;T. John,&nbsp;C. Stephan-Scherb","doi":"10.1002/maco.202414575","DOIUrl":"https://doi.org/10.1002/maco.202414575","url":null,"abstract":"&lt;p&gt;This study investigates the impact of humidity on the corrosion behavior of an Fe–18Cr–12Ni alloy in environments containing KCl, as a deposit, and either laboratory air or &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 \u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mstyle&gt;\u0000 &lt;mspace&gt;&lt;/mspace&gt;\u0000 \u0000 &lt;mtext&gt;SO&lt;/mtext&gt;\u0000 &lt;mspace&gt;&lt;/mspace&gt;\u0000 &lt;/mstyle&gt;\u0000 \u0000 &lt;mn&gt;2&lt;/mn&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; at 560°C for exposure times up to 330 h. Corrosion characteristics were analyzed using scanning electron microscopy (SEM) and X-ray diffraction (XRD) with subsequent Rietveld analysis to quantify the obtained reaction products. Samples exposed to lab air and KCl showed half the weight gain in humid air than in dry atmospheres (&lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 \u0000 &lt;mrow&gt;\u0000 &lt;mn&gt;0.80&lt;/mn&gt;\u0000 &lt;mspace&gt;&lt;/mspace&gt;\u0000 \u0000 &lt;mfrac&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mspace&gt;&lt;/mspace&gt;\u0000 \u0000 &lt;mtext&gt;mg&lt;/mtext&gt;\u0000 &lt;/mrow&gt;\u0000 \u0000 &lt;msup&gt;\u0000 &lt;mtext&gt;cm&lt;/mtext&gt;\u0000 \u0000 &lt;mn&gt;2&lt;/mn&gt;\u0000 &lt;/msup&gt;\u0000 &lt;/mfrac&gt;\u0000 \u0000 &lt;mo&gt;±&lt;/mo&gt;\u0000 \u0000 &lt;mn&gt;0.06&lt;/mn&gt;\u0000 &lt;mspace&gt;&lt;/mspace&gt;\u0000 \u0000 &lt;mfrac&gt;\u0000 &lt;mtext&gt;mg&lt;/mtext&gt;\u0000 \u0000 &lt;mrow&gt;\u0000 &lt;mtext&gt;cm&lt;/mtext&gt;\u0000 \u0000 &lt;msup&gt;\u0000 &lt;mspace&gt;&lt;/mspace&gt;\u0000 \u0000 &lt;mn&gt;2&lt;/mn&gt;\u0000 &lt;/msup&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/mfrac&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; at 30.00% &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 \u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;±&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; 0.07% relative humidity (r.H.) vs. &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 \u0000 &lt;mrow&gt;\u0000 ","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"76 4","pages":"572-580"},"PeriodicalIF":1.6,"publicationDate":"2024-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/maco.202414575","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809923","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}