npj Materials Degradation最新文献_第2页

The effect of antibacterial peptide ε-Polylysine against Pseudomonas aeruginosa biofilm in marine environment 抗菌肽ε-聚赖氨酸对海洋环境中铜绿假单胞菌生物膜的影响

IF 6.6 2区材料科学

npj Materials Degradation Pub Date : 2024-11-29 DOI: 10.1038/s41529-024-00539-6

Siwei Wu, Quantong Jiang, Dongzhu Lu, Xiaofan Zhai, Jizhou Duan, Baorong Hou

{"title":"The effect of antibacterial peptide ε-Polylysine against Pseudomonas aeruginosa biofilm in marine environment","authors":"Siwei Wu, Quantong Jiang, Dongzhu Lu, Xiaofan Zhai, Jizhou Duan, Baorong Hou","doi":"10.1038/s41529-024-00539-6","DOIUrl":"10.1038/s41529-024-00539-6","url":null,"abstract":"Natural antibacterial agents with antimicrobial properties have a broad potential to prevent bacterial from forming biofilms adhesion in marine environments. ε-Polylysine (E-PL) consist of homomeric polymer with 25–30 lysine residues with stability, nontoxicity, and biodegradability. ε-Polylysine is a natural cationic antibacterial peptide that can resist microbial forming biofilm adhesion. The current study investigated the action of E-PL against Pseudomonas aeruginosa biofilm isolated from a marine environment. Crystal violet staining was used to examine the effects of E-PL on the formation and destruction of mature biofilms. Scanning Electron and fluorescence microscopy revealed that E-PL treatment damaged the biofilm structure and affected the secretion of extracellular polymers. The CCK8 colorimetric assay showed that E-PL also decreased the metabolic activity and motility of biofilm bacteria. QPCR and transcriptome analysis revealed that E-PL affected biofilm formation and transcriptional regulation by downregulating genes involved in flagellar synthesis (flgE, PA4651, pilW), chemotaxis transduction (PA1251, PA4951, PA4788), biofilm biosynthesis (pelC, pelD, pslK, plsM), transcriptional regulation (PA3973, PA3508, PA0268), phenazine biosynthesis (phzM, phzH, phzS), and electron transfer (PA5401, PA5400, PA3492). This study used multiple methods to identify the mechanism of E-PL action against biofilm, informing the design of novel biofilm treatment methods.","PeriodicalId":19270,"journal":{"name":"npj Materials Degradation","volume":" ","pages":"1-11"},"PeriodicalIF":6.6,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41529-024-00539-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142758128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Nb contents on the passivation behavior of high-strength anti-seismic rebar in concrete environments Nb含量对混凝土环境中高强度抗震钢筋钝化性能的影响

IF 6.6 2区材料科学

npj Materials Degradation Pub Date : 2024-11-29 DOI: 10.1038/s41529-024-00543-w

Zeyun Zeng, Shangjun Gu, Jie Wang, Fulong Wei, Xiang Xie, Zhiying Li, Hui Yang, Changrong Li

引用次数: 0

Bayesian assessment of commonly used equivalent circuit models for corrosion analysis in electrochemical impedance spectroscopy 电化学阻抗谱中腐蚀分析常用等效电路模型的贝叶斯评估

IF 6.6 2区材料科学

npj Materials Degradation Pub Date : 2024-11-28 DOI: 10.1038/s41529-024-00537-8

Runze Zhang, Debashish Sur, Kangming Li, Julia Witt, Robert Black, Alexander Whittingham, John R. Scully, Jason Hattrick-Simpers

{"title":"Bayesian assessment of commonly used equivalent circuit models for corrosion analysis in electrochemical impedance spectroscopy","authors":"Runze Zhang, Debashish Sur, Kangming Li, Julia Witt, Robert Black, Alexander Whittingham, John R. Scully, Jason Hattrick-Simpers","doi":"10.1038/s41529-024-00537-8","DOIUrl":"10.1038/s41529-024-00537-8","url":null,"abstract":"Electrochemical Impedance Spectroscopy (EIS) is a crucial technique for assessing corrosion of metallic materials. The analysis of EIS hinges on the selection of an appropriate equivalent circuit model (ECM) that accurately characterizes the system under study. In this work, we systematically examined the applicability of three commonly used ECMs across several typical material degradation scenarios. By applying Bayesian Inference to simulated corrosion EIS data, we assessed the suitability of these ECMs under different corrosion conditions and identified regions where the EIS data lacks sufficient information to statistically substantiate the ECM structure. Additionally, we posit that the traditional approach to EIS analysis, which often requires measurements to very low frequencies, might not be always necessary to correctly model the appropriate ECM. Our study assesses the impact of omitting data from low to medium-frequency ranges on inference results and reveals that a significant portion of low-frequency measurements can be excluded without substantially compromising the accuracy of extracting system parameters. Further, we propose simple checks to the posterior distributions of the ECM components and posterior predictions, which can be used to quantitatively evaluate the suitability of a particular ECM and the minimum frequency required to be measured. This framework points to a pathway for expediting EIS acquisition by intelligently reducing low-frequency data collection and permitting on-the-fly EIS measurements.","PeriodicalId":19270,"journal":{"name":"npj Materials Degradation","volume":" ","pages":"1-7"},"PeriodicalIF":6.6,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41529-024-00537-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142758122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Systematic quantification of hydrogen in pipeline steel by atom probe tomography after ambient charging and transfer 通过原子探针层析成像技术对管道钢中的氢进行系统定量分析

IF 6.6 2区材料科学

npj Materials Degradation Pub Date : 2024-11-18 DOI: 10.1038/s41529-024-00528-9

Shuohan Wang, Peng Zhang, Majid Laleh, Lu Jiang, Mike Yongjun Tan, Ross K. W. Marceau

{"title":"Systematic quantification of hydrogen in pipeline steel by atom probe tomography after ambient charging and transfer","authors":"Shuohan Wang, Peng Zhang, Majid Laleh, Lu Jiang, Mike Yongjun Tan, Ross K. W. Marceau","doi":"10.1038/s41529-024-00528-9","DOIUrl":"10.1038/s41529-024-00528-9","url":null,"abstract":"Atom probe tomography (APT) is a promising tool to measure the atomic-scale distribution of hydrogen in solid matter for the assessment of hydrogen embrittlement susceptibility of materials. However, the accuracy of such measurements resulting from ambient charging and transfer experiments needs to be established. In this work, APT quantification of hydrogen (H) and deuterium (D) in a typical X65 pipeline steel has been determined after ambient charging and transfer to ascertain the contribution of artifacts to the measured H/D signal. A series of experimental workflows related to sample preparation (electropolishing, focussed ion beam) and electrochemical charging conditions (different electrolytes and charging potentials) were explored for H/D measurement using APT. The results show that APT can be used to measure charged H/D with statistical confidence after ambient charging and transfer, that hydrogen ingress occurs during electropolishing, and using a more negative charging potential will introduce more H/D into the material.","PeriodicalId":19270,"journal":{"name":"npj Materials Degradation","volume":" ","pages":"1-13"},"PeriodicalIF":6.6,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41529-024-00528-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142665206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Corrosion evaluation of Al-Cu-Mn-Zr cast alloys in 3.5% NaCl solution 3.5% NaCl 溶液中 Al-Cu-Mn-Zr 铸造合金的腐蚀评估

IF 6.6 2区材料科学

npj Materials Degradation Pub Date : 2024-11-09 DOI: 10.1038/s41529-024-00519-w

Jiheon Jun, Amit Shyam, Sumit Bahl, Yi-Feng Su, J. Allen Haynes

引用次数: 0

Fracture analysis under modes I and II of adhesive joints on CFRP in saline environment 盐水环境中 CFRP 粘接接头在模式 I 和 II 下的断裂分析

IF 6.6 2区材料科学

npj Materials Degradation Pub Date : 2024-11-07 DOI: 10.1038/s41529-024-00535-w

P. Vigón, A. Argüelles, M. Lozano, J. Viña

引用次数: 0

Microscale chemical imaging to characterize and quantify corrosion processes at the metal-electrolyte interface 利用微尺度化学成像技术表征和量化金属-电解质界面的腐蚀过程。

IF 6.6 2区材料科学

npj Materials Degradation Pub Date : 2024-11-06 DOI: 10.1038/s41529-024-00534-x

Cristhiana C. Albert, Shishir Mundra, Dario Ferreira Sanchez, Fabio E. Furcas, Ashish D. Rajyaguru, O. Burkan Isgor, Daniel Grolimund, Ueli M. Angst

{"title":"Microscale chemical imaging to characterize and quantify corrosion processes at the metal-electrolyte interface","authors":"Cristhiana C. Albert, Shishir Mundra, Dario Ferreira Sanchez, Fabio E. Furcas, Ashish D. Rajyaguru, O. Burkan Isgor, Daniel Grolimund, Ueli M. Angst","doi":"10.1038/s41529-024-00534-x","DOIUrl":"10.1038/s41529-024-00534-x","url":null,"abstract":"We introduce an experimental setup to chemically image corrosion processes at metal-electrolyte interfaces under stagnant, confined conditions—relevant in a wide range of situations. The setup is based on a glass capillary, in which precipitation of corrosion products in the interfacial aqueous phase can be monitored over time with optical microscopy, and chemically and structurally characterized with microscopic synchrotron-based techniques (X-ray fluorescence, X-ray diffraction, and X-ray absorption spectroscopy). Moreover, quantification of precipitates through X-ray transmission measurements provides in-situ corrosion rates. We illustrate this setup for iron corrosion in a pH 8 electrolyte, revealing the critical role of O2 and iron diffusion in governing the precipitation of ferrihydrite and its transformation to goethite. Corrosion and coupled reactive transport processes can thus be monitored and fundamentally investigated at the metal-electrolyte interface, with micrometer-scale resolution. This capillary setup has potential applications for in-situ corrosion studies of various metals and environments.","PeriodicalId":19270,"journal":{"name":"npj Materials Degradation","volume":" ","pages":"1-9"},"PeriodicalIF":6.6,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11540903/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142624507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microstructure engineering for corrosion resistance in structural alloy design 结构合金设计中的抗腐蚀微结构工程

IF 6.6 2区材料科学

npj Materials Degradation Pub Date : 2024-11-04 DOI: 10.1038/s41529-024-00533-y

Karthikeyan Hariharan, Sannakaisa Virtanen

引用次数: 0

Insights into the degradation mechanism of Fe-40Ni-15Co superalloy exposed to marine atmospheric and high-temperature conditions 对暴露于海洋大气和高温条件下的 Fe-40Ni-15Co 超合金降解机制的深入研究

IF 6.6 2区材料科学

npj Materials Degradation Pub Date : 2024-11-02 DOI: 10.1038/s41529-024-00531-0

Quanxiang Sun, Hongfei Yu, Yao Wang, Bo Zhang, Xiaole Han, Xingqi Wang, Dechuang Zhang, Jianguo Lin, Yange Yang, Fuhui Wang

{"title":"Insights into the degradation mechanism of Fe-40Ni-15Co superalloy exposed to marine atmospheric and high-temperature conditions","authors":"Quanxiang Sun, Hongfei Yu, Yao Wang, Bo Zhang, Xiaole Han, Xingqi Wang, Dechuang Zhang, Jianguo Lin, Yange Yang, Fuhui Wang","doi":"10.1038/s41529-024-00531-0","DOIUrl":"10.1038/s41529-024-00531-0","url":null,"abstract":"This study investigated the corrosion and oxidation mechanism of the Cr-free Fe-40Ni-15Co superalloy with exposure to a tropical marine atmosphere for one year and a subsequent high temperature of 650 °C for 300 h. The degradation behavior of the samples was evaluated based on surface characterization and analysis. In the tropical marine atmospheres, the corrosion process of the Fe-40Ni-15Co superalloy presented an initial localized type after one month of exposure and gradually developed into uniform. The corrosion products were mainly comprised of Fe2O3 and NiO, suppressing the pitting process. During the high-temperature oxidation process, all samples presented super-parabolic oxidation kinetics. Except for the initial active oxidation due to salt deposits, the corrosion products after atmospheric exposure could significantly enhance the oxidation resistance at 650 °C. An explanation for the degradation mechanism of the Fe-40Ni-15Co superalloy was developed based on the synergistic effects of atmospheric corrosion and high-temperature oxidation.","PeriodicalId":19270,"journal":{"name":"npj Materials Degradation","volume":" ","pages":"1-12"},"PeriodicalIF":6.6,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41529-024-00531-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142574233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lifetime prediction of epoxy coating using convolutional neural networks and post processing image recognition methods 利用卷积神经网络和后处理图像识别方法预测环氧树脂涂层的寿命

IF 6.6 2区材料科学

npj Materials Degradation Pub Date : 2024-11-02 DOI: 10.1038/s41529-024-00532-z

Fandi Meng, Yufan Chen, Jianning Chi, Huan Wang, Fuhui Wang, Li Liu

{"title":"Lifetime prediction of epoxy coating using convolutional neural networks and post processing image recognition methods","authors":"Fandi Meng, Yufan Chen, Jianning Chi, Huan Wang, Fuhui Wang, Li Liu","doi":"10.1038/s41529-024-00532-z","DOIUrl":"10.1038/s41529-024-00532-z","url":null,"abstract":"The rapid failure of organic coatings in deep-sea environments complicates accurate lifetime prediction. Given the rapid cracking characteristic on the coating surface in this environment, a comprehensive “performance-structure” failure model was established. Initially, a targeted image recognition approach containing convolutional neural network (CNN) and post-processing was constructed for the crack area detection. An overall precision of 82.81% demonstrated the network’s good accuracy. The length distribution and the statistical evolution of cracks were extracted from SEM images to obtain the kinetic equation of the cracks related to coating structure degradation. In addition, the kinetics of water diffusion and coating adhesion were examined, as they represent critical parameters of coating performance. Based on this achievement, a failure model incorporating three dominant factors was integrated by the gray relational analysis method. The average prediction error of the model was 2.60%, which lays the groundwork for developing image-based methods to predict coating life.","PeriodicalId":19270,"journal":{"name":"npj Materials Degradation","volume":" ","pages":"1-11"},"PeriodicalIF":6.6,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41529-024-00532-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142574242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0