{"title":"Masthead: Materials and Corrosion. 2/2025","authors":"","doi":"10.1002/maco.202570022","DOIUrl":"https://doi.org/10.1002/maco.202570022","url":null,"abstract":"","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"76 2","pages":"209"},"PeriodicalIF":1.6,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/maco.202570022","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143362271","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. 2/2025","authors":"","doi":"10.1002/maco.202570023","DOIUrl":"https://doi.org/10.1002/maco.202570023","url":null,"abstract":"","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"76 2","pages":"210-213"},"PeriodicalIF":1.6,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/maco.202570023","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143362272","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}
Ming Fan, Kang-wei Zhao, Jia-rong Ke, Jian-jun Yang, Xi-mao Liu, Deng Luo, Cai-he Fan, Xiang-jiang Xiong, Qian Chen, Fang-fang Li, Wei Zhang, Edward Ghali, Hong-yan Guo
{"title":"Effect of Sulfate-Based Stabilizers on the Rust Layer Formation and Corrosion Resistance of Q420qNH Weathering Steel","authors":"Ming Fan, Kang-wei Zhao, Jia-rong Ke, Jian-jun Yang, Xi-mao Liu, Deng Luo, Cai-he Fan, Xiang-jiang Xiong, Qian Chen, Fang-fang Li, Wei Zhang, Edward Ghali, Hong-yan Guo","doi":"10.1002/maco.202414640","DOIUrl":"https://doi.org/10.1002/maco.202414640","url":null,"abstract":"<div>\u0000 \u0000 <p>This study investigated the use of sulfate-based stabilizers to stabilize the surface of Q420qNH weathering steel (WS) and their effect on rust layer formation and corrosion resistance. Dry/wet cyclic corrosion tests (CCT) were used to examine the effects of the various treatment regimens. The results demonstrated that sulfate-based stabilizers accelerated the formation of α-FeOOH, thereby enhancing the corrosion resistance of WS in simulated marine atmospheres. Particularly, the A1 stabilizer consisting of the CuSO<sub>4</sub>, FeSO<sub>4</sub>, NaHSO<sub>3</sub>, and Cr<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub> solution system shows better applicability under the simulated marine atmosphere. Specifically, after 8+64CCTs, the corrosion rate of sample A1 decreased by 54%, while the proportion of α-FeOOH, the <i>α</i>/<i>γ</i>* value, and the self-corrosion potential (<i>E</i><sub>corr</sub>) increased by 15%, 0.55, and 0.29 V, respectively. The rust layer of Q420qNH WS primarily consists of γ-FeOOH, α-FeOOH, Fe<sub>3</sub>O<sub>4</sub>, and γ-Fe<sub>2</sub>O<sub>3</sub>. Surface stabilization treatment with sulfate-based stabilizers promoted the enrichment of Cu and Cr in the cracks, facilitating the filling of these defects and enhancing the stability and corrosion potential of the rust layer.</p></div>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"76 5","pages":"693-710"},"PeriodicalIF":1.6,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143908934","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}
Maria Ponomareva, Jiri Duchoslav, David Stifter, Matthias Kogler, Florian Fahrnberger, Herbert Hutter, Gerald Luckeneder, Laura Hader-Kregl, Markus Valtiner
{"title":"Comparison of LEIS, SIMS, and AR-XPS as Methods for Surface Characterization of Passivated Zn–Al–Mg Steel","authors":"Maria Ponomareva, Jiri Duchoslav, David Stifter, Matthias Kogler, Florian Fahrnberger, Herbert Hutter, Gerald Luckeneder, Laura Hader-Kregl, Markus Valtiner","doi":"10.1002/maco.202414776","DOIUrl":"https://doi.org/10.1002/maco.202414776","url":null,"abstract":"<p>The combination of different surface-sensitive techniques is frequently used in material sciences to analyze complex systems. How these methods compare in terms of quantitative and qualitative information is often unclear. In this study, we directly compare low-energy ion scattering spectroscopy (LEIS), secondary ion mass spectrometry (SIMS), and angle-resolved X-ray photoelectron spectroscopy (AR-XPS) depth profiling analyses. Therefore, we use the Zn–Al–Mg model coatings after alkaline and acidic treatments in model solutions. The combined use of AR-XPS and LEIS depth profiling proved effective in studying compositional and elemental changes in the surface oxides of Zn–Al–Mg coatings after alkaline and acidic treatments. Additionally, by combining these methods, SIMS depth profiling can be effectively calibrated for matrix effects. Here, we find that, for example, Mg is considerably more sensitive to SIMS detection, based on effective secondary ionisation. Such effects must be considered for data interpretation.</p>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"76 5","pages":"640-649"},"PeriodicalIF":1.6,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/maco.202414776","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143909677","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}
Yijie Zhu, Jing Qi, Shuiping Que, Hongmin Yang, Chaoqun Ma, Jingjing Li
{"title":"First-Principles Study on the Influence of Atomic Coordination on the Adhesion Strength and Stability of FeCr2O4/α-Fe Interface","authors":"Yijie Zhu, Jing Qi, Shuiping Que, Hongmin Yang, Chaoqun Ma, Jingjing Li","doi":"10.1002/maco.202414766","DOIUrl":"https://doi.org/10.1002/maco.202414766","url":null,"abstract":"<div>\u0000 \u0000 <p>To investigate the effect of atomic coordination on the stability and adhesion strength of the FeCr<sub>2</sub>O<sub>4</sub>/α-Fe interface, four different interface models (O top-site, Cr top-site, Fe<sub>1</sub> top-site, and Fe<sub>2</sub> top-site) are developed based on first-principles density functional theory. The results indicate that the FeCr<sub>2</sub>O<sub>4</sub>/α-Fe interface primarily consists of Fe<sub>me</sub>-O<sub>ox</sub> mixed ionic-covalent bonds and Fe<sub>me</sub>-Fe<sub>ox</sub> metallic bonds, with the Fe<sub>me</sub>-O<sub>ox</sub> bonds dominating the interfacial adhesion strength. Compared with the Fe<sub>2</sub> top-site interface, the Fe<sub>1</sub> and Cr top-site interfaces exhibit low charge accumulation and longer Fe<sub>me</sub>-O<sub>ox</sub> bonds, which results in weaker Fe<sub>me</sub>-O<sub>ox</sub> bonding strength at the interface. The orbital hybridization between Fe and O atoms at the Fe<sub>2</sub> top-site interface is stronger than that at the Cr top-site interface, leading to greater structural stability for the Fe<sub>2</sub> top-site interface. These results could have practical significance for understanding the failure of the oxide film on ferritic heat exchangers.</p></div>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"76 5","pages":"686-692"},"PeriodicalIF":1.6,"publicationDate":"2025-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143909594","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}
Xiang Li, Jun Wang, Wenbin Qian, Haohao Xu, Yanxia Du, Rujiao Duan, Jianguo Liu, Gan Cui
{"title":"Corrosion Kinetics and Prediction Modeling of X70 Steel Under Dynamic DC Interference","authors":"Xiang Li, Jun Wang, Wenbin Qian, Haohao Xu, Yanxia Du, Rujiao Duan, Jianguo Liu, Gan Cui","doi":"10.1002/maco.202414679","DOIUrl":"https://doi.org/10.1002/maco.202414679","url":null,"abstract":"<div>\u0000 \u0000 <p>Through comprehensive electrochemical and corrosion rate testing, this study elucidates the dynamic changes in the impedance spectrum and corrosion rate of X70 steel subjected to dynamic direct current (DC) interference. An equivalent circuit model was developed to represent the system under dynamic DC conditions, and the current components within the electrode system were calculated using circuit theory. This analysis allowed for the determination of the non-Faraday process contribution, thus clarifying its impact mechanism and the overall corrosion mechanism under dynamic DC interference. The findings indicate that non-Faraday processes play a crucial role in dynamic DC interference scenarios, with non-Faraday current increasing proportionally to the amplitude of the interference potential while Faraday efficiency remains unchanged. Furthermore, as the frequency of the interference potential increases, non-Faraday current increases and Faraday efficiency decreases. Positive biasing of the interference potential maintains constant non-Faraday current but enhances Faraday efficiency.</p></div>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"76 5","pages":"650-660"},"PeriodicalIF":1.6,"publicationDate":"2025-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143909593","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}
Tong Xu, Hongqiang Chu, Jinjie Shi, Lu Yang, Baolin Long, Yi Xu, Wenwei Li
{"title":"Study of Polypyrrole Coating on the Performance Improvement of Ag/AgCl Chloride Ion Sensor in Highly Alkaline Concrete Environments","authors":"Tong Xu, Hongqiang Chu, Jinjie Shi, Lu Yang, Baolin Long, Yi Xu, Wenwei Li","doi":"10.1002/maco.202414608","DOIUrl":"https://doi.org/10.1002/maco.202414608","url":null,"abstract":"<div>\u0000 \u0000 <p>Ag/AgCl possesses the merits of a stable reference potential and good chemical stability, making it widely used in concrete for monitoring chloride ions. However, in the concrete circumstance, the high hydroxide ion content would significantly deteriorate the sensitivity and stability of the Ag/AgCl electrode in detecting chloride ions. Herein, in this work, a highly sensitive and stable Ag/AgCl electrode is proposed by employing a protective coating layer based on polypyrrole (PPy). Using a facile coating process, a uniform PPy layer is coated on the surface of an Ag piece, effectively precluding hydroxide ions from reacting with AgCl. The modified Ag/AgCl electrode exhibits high sensitivity to chloride ions over a wide range (10<sup>−5</sup>–5 mol/L), fast response time (0.01 s), and distinguished long-term stability (90 days). Moreover, the feasibility of the proposed Ag/AgCl electrode in monitoring chloride ions of concrete has been validated, suggesting its great practicability in concrete structures.</p></div>","PeriodicalId":18225,"journal":{"name":"Materials and Corrosion-werkstoffe Und Korrosion","volume":"76 5","pages":"674-685"},"PeriodicalIF":1.6,"publicationDate":"2025-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143909592","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":"Microstructure and Electrochemical Corrosion Behavior of Vacuum-Cladded FeNiCoCrMoBSi High-Entropy Alloy Coating","authors":"Fang Xie, Changsheng Zhai, Xi Zhang, Sainan Jiang, Xin Zhang, Hongxing Zheng, 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/cm<sup>2</sup>), the highest self-corrosion potential (−0.3797 V), the highest polarization impedance (69 616 Ω), and impedance modulus (23 205.68 W cm<sup>2</sup>). 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}
Ch. JagadeeswaraRao, Anantha Lakshmi M., P. V. Suneesh, S. Ningshen
{"title":"Molten Salt Corrosion Studies of Sanicro-25 by Electrochemical Techniques at High Temperature","authors":"Ch. JagadeeswaraRao, Anantha Lakshmi M., P. V. Suneesh, 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 Fe<sub>3</sub>O<sub>4</sub>, Cr<sub>2</sub>O<sub>3</sub>, 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}
Pranav Vivek Kulkarni, Meet Jaydeepkumar Oza, Anna Igual-Munoz, Jean-Michel Sallese, Moslem Shahverdi, Christian Leinenbach, Stefano Mischler
{"title":"Cover Picture: Materials and Corrosion. 1/2025","authors":"Pranav Vivek Kulkarni, Meet Jaydeepkumar Oza, Anna Igual-Munoz, Jean-Michel Sallese, Moslem Shahverdi, Christian Leinenbach, 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}