npj Materials Degradation最新文献_第6页

Effect of structural disorder induced by external irradiation with heavy ions on the alteration of a four oxide borosilicate glass 重离子外部辐照引起的结构紊乱对四氧化物硼硅酸盐玻璃变化的影响

IF 5.1 2区材料科学

npj Materials Degradation Pub Date : 2024-06-17 DOI: 10.1038/s41529-024-00483-5

Stéphane Gin, Mélanie Taron, Hélène Arena, Jean-Marc Delaye

{"title":"Effect of structural disorder induced by external irradiation with heavy ions on the alteration of a four oxide borosilicate glass","authors":"Stéphane Gin, Mélanie Taron, Hélène Arena, Jean-Marc Delaye","doi":"10.1038/s41529-024-00483-5","DOIUrl":"10.1038/s41529-024-00483-5","url":null,"abstract":"The irradiation of glass by heavy ions induces structural damage, generally leading to a decrease in its chemical durability whose amplitude strongly depends on the glass chemical composition. Here, we investigate the effects of irradiation by 7 MeV Au ions (simulating the main ballistic effects induced by self-irradiation in nuclear glass) on the behavior of a 4-oxide borosilicate glass in both the initial and residual dissolution regimes. The comparison between irradiated and non-irradiated glasses provides insights into the predominant atomic mechanisms governing glass alteration processes. The most pronounced effect is observed on interdiffusion in acidic conditions, with the rate increased by more than an order of magnitude for the irradiated glass. We show that both the interdiffusion regime and the residual regime are controlled by the hydrolysis of the B—O—Si linkages, whereas under initial dissolution rate regime in basic conditions the rate-limiting step becomes the hydrolysis of Si—O—Si linkages. Overall, the observations suggest structural disorder due to external irradiation by Au ions primarily affects the kinetics of glass alteration without changing the fundamental nature of the limiting reactions.","PeriodicalId":19270,"journal":{"name":"npj Materials Degradation","volume":null,"pages":null},"PeriodicalIF":5.1,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41529-024-00483-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141425147","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

Pitting corrosion characteristics of sintered Type 316 L stainless steel: relationship between pores and MnS 烧结 316 L 型不锈钢的点腐蚀特性：孔隙与 MnS 之间的关系

IF 5.1 2区材料科学

npj Materials Degradation Pub Date : 2024-06-07 DOI: 10.1038/s41529-024-00482-6

Haruka Saito, Masashi Nishimoto, Izumi Muto

引用次数: 0

Ion migration mechanisms in the early stages of drying and degradation of oil paint films 油漆薄膜干燥和降解初期的离子迁移机制

IF 5.1 2区材料科学

npj Materials Degradation Pub Date : 2024-06-07 DOI: 10.1038/s41529-024-00472-8

Margherita Gnemmi, Laura Fuster-Lòpez, Marion Mecklenburg, Alison Murray, Sarah Sands, Greg Watson, Francesca Caterina Izzo

{"title":"Ion migration mechanisms in the early stages of drying and degradation of oil paint films","authors":"Margherita Gnemmi, Laura Fuster-Lòpez, Marion Mecklenburg, Alison Murray, Sarah Sands, Greg Watson, Francesca Caterina Izzo","doi":"10.1038/s41529-024-00472-8","DOIUrl":"10.1038/s41529-024-00472-8","url":null,"abstract":"The study of film-formation processes of oil paints has been extensively addressed over the last decade and the influence of metal ions in the drying and degradation stages of oil paints has been demonstrated. This research aimed to determine a suitable methodology for monitoring the early drying stages of selected commercial oil paint films and to gain an insight into the migration mechanisms of material degradation taking place between adjacent paint films, with special attention to the influence of the lead white. For this purpose, a hybrid approach was adopted to characterize the composition of the paint and highlight failure mechanisms in the paint films through a wide range of time. The methods included scribe tests, percentage weight variation (ΔW%), attenuated reflectance Fourier transform infrared spectrophotometry (ATR-FTIR), gas chromatography-mass spectrometry (GC-MS), and thermal analysis with differential scanning calorimetry (TG-DSC). The results show how metal ions interact with the oil binder and the pigment in the adjacent paint film: the transverse migration of lead white is shown to affect the reactivity of polyunsaturated triglycerides, increasing the rate of oxygen uptake and promoting the formation of radicals and bonds between polymer chains, depending on the pigment with which it interacts.","PeriodicalId":19270,"journal":{"name":"npj Materials Degradation","volume":null,"pages":null},"PeriodicalIF":5.1,"publicationDate":"2024-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41529-024-00472-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141294997","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 antimony additions on the microstructure and performance of Zn–Mg–Al alloy coatings 添加锑对锌镁铝合金涂层微观结构和性能的影响

IF 5.1 2区材料科学

npj Materials Degradation Pub Date : 2024-06-07 DOI: 10.1038/s41529-024-00481-7

Daniel A. Britton, David Penney, Amar D. Malla, Shahin Mehraban, James Sullivan, Mathew Goldsworthy, James McGettrick, Richard Johnston, Ria L. Mitchell, Clive Challinor

{"title":"Effect of antimony additions on the microstructure and performance of Zn–Mg–Al alloy coatings","authors":"Daniel A. Britton, David Penney, Amar D. Malla, Shahin Mehraban, James Sullivan, Mathew Goldsworthy, James McGettrick, Richard Johnston, Ria L. Mitchell, Clive Challinor","doi":"10.1038/s41529-024-00481-7","DOIUrl":"10.1038/s41529-024-00481-7","url":null,"abstract":"Microscopy, electrochemical techniques and mechanical testing are used to investigate the effect of varying antimony additions (0.45–1.8 wt%) on the microstructure and corrosion properties of zinc-magnesium-aluminium coating alloys. Samples were produced by splat casting to produce high cooling rates similar to those seen in a continuous galvanising line. X-Ray Microscopy reveals that the Sb additions produce disk-shaped Mg3Sb2 intermetallics, subsequently reducing or eliminating the MgZn2 eutectic. Electrochemical testing in 1 wt% NaCl shows that the Mg3Sb2 phase is cathodic with respect to the bulk alloy with slower oxygen reduction kinetics. The decrease in eutectic content leads to less intense anodic activity. The combined effect is anodic and cathodic deactivation, which leads to a 43% reduction in corrosion rate as measured through LPR compared to the base alloy. This work shows that quaternary additions to ZMA coating alloys can be a potential route to improved corrosion resistance for galvanic protection.","PeriodicalId":19270,"journal":{"name":"npj Materials Degradation","volume":null,"pages":null},"PeriodicalIF":5.1,"publicationDate":"2024-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41529-024-00481-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141287028","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

Electrochemical characteristics and damage mechanism in scrubber washing water of UNS N08367 with plasma ion nitriding and electropolishing 等离子离子氮化和电抛光 UNS N08367 洗涤器洗涤水中的电化学特性和损伤机理

IF 5.1 2区材料科学

npj Materials Degradation Pub Date : 2024-06-01 DOI: 10.1038/s41529-024-00474-6

Hyun-Kyu Hwang, Seong-Jong Kim

{"title":"Electrochemical characteristics and damage mechanism in scrubber washing water of UNS N08367 with plasma ion nitriding and electropolishing","authors":"Hyun-Kyu Hwang, Seong-Jong Kim","doi":"10.1038/s41529-024-00474-6","DOIUrl":"10.1038/s41529-024-00474-6","url":null,"abstract":"In this investigation, electropolishing and plasma ion nitriding are applied to super austenitic stainless steel for the purpose of improving its corrosion and pitting resistance. Electrochemical experiments are conducted with washing water collected directly from the ship’s scrubber. After electropolishing, the surface roughness is improved by about 73.6% compared to mechanical polishing. After plasma ion nitriding, CrN (precipitate), Fe4N (compound), and γN (solid solution) are observed on the surface. The thickness of the layer formed on the surface is measured to be about 10 μm. A hysteresis loop is observed in the cyclic potentiodynamic polarization curves of mechanical polishing and electropolishing, and the areas are calculated as 23.33 mW cm−2 and 0.17 mW cm−2, respectively. The polarization curve of plasma ion nitriding presents perfect passivation characteristics. Accordingly, mechanical polishing and electropolishing reveal local corrosion, whereas plasma ion nitriding presents a tendency towards general corrosion. In the mechanical polishing, electropolishing, and plasma ion nitriding, the corrosion current densities are 0.665 μA cm−2, 0.093 μA cm−2, and 16.47 μA cm−2, respectively, and the maximum damage depth is observed to grow progressively smaller from plasma ion nitriding to electropolishing and then mechanical polishing.","PeriodicalId":19270,"journal":{"name":"npj Materials Degradation","volume":null,"pages":null},"PeriodicalIF":5.1,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41529-024-00474-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141187659","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

Static corrosion of stainless steel 316H in chemically purified molten NaF-KF-UF4 salt 不锈钢 316H 在化学纯化的熔融 NaF-KF-UF4 盐中的静态腐蚀

IF 5.1 2区材料科学

npj Materials Degradation Pub Date : 2024-05-29 DOI: 10.1038/s41529-024-00457-7

Jaewoo Park, Amanda Leong, Jinsuo Zhang

引用次数: 0

Delayed fracture behavior of ultra-high-strength mooring chain steel evaluated by potentiostatic hydrogen-charging combined with SSRT 通过恒电位充氢结合 SSRT 评估超高强度系泊链钢的延迟断裂行为

IF 5.1 2区材料科学

npj Materials Degradation Pub Date : 2024-05-28 DOI: 10.1038/s41529-024-00477-3

Jiajiao Wei, Ke Hou, Feng Yang, Zhipeng Chang, Ju Li, Yunliang Shao, Mengjia Li, Xiaomei Yu, Jinyou Zheng, Yutao Zhou, Yongpeng Yang, Dehai Ping, Yong Liu, Min Li, Songjie Li

引用次数: 0

Complementary corrosion protection of cast AlSi7Mg0.3 alloy using Zr-Cr conversion and polyacrylic/siloxane-silica multilayer coatings 使用 Zr-Cr 转换和聚丙烯酸/硅氧烷-二氧化硅多层涂层对铸造 AlSi7Mg0.3 合金进行互补性腐蚀保护

IF 5.1 2区材料科学

npj Materials Degradation Pub Date : 2024-05-28 DOI: 10.1038/s41529-024-00467-5

Peter Rodič, Barbara Kapun, Ingrid Milošev

{"title":"Complementary corrosion protection of cast AlSi7Mg0.3 alloy using Zr-Cr conversion and polyacrylic/siloxane-silica multilayer coatings","authors":"Peter Rodič, Barbara Kapun, Ingrid Milošev","doi":"10.1038/s41529-024-00467-5","DOIUrl":"10.1038/s41529-024-00467-5","url":null,"abstract":"Aluminium cast alloy AlSi7Mg0.3 is a lightweight metal commonly used in automotive, aeronautical and mechanical applications. It has good corrosion resistance but, under harsh operative conditions, would benefit from additional protection. In this study, a corrosion-protective multilayer coating system for AlSi7Mg0.3 based on hexafluoro-zirconated trivalent chromium coating (Zr-CrCC) and polyacrylic/siloxane-silica (PEHA-SS) coating was developed. The Zr-CrCC was formed by immersion of the substrate in a commercial conversion bath (SurTec® 650). PEHA-SS synthesis was based on organic precursors (2-ethylhexyl acrylate and [3-(methacryloyloxy)propyl]trimethoxysilane) and an inorganic precursor, tetraethyl orthosilicate. After deposition on AlSi7Mg0.3, each coating was first characterised individually, followed by the analysis of the multilayer using scanning electron microscopy and energy-dispersive X-ray spectroscopy. The adhesion of the coatings was evaluated with a cross-hatch cut test. The corrosion studies in sodium chloride solution using electrochemical impedance spectroscopy and salt spray testing showed that the multilayer system is superior to individual Zr-CrCC and PEHA-SS coatings. After 4 months in 0.1 M NaCl, the multilayer-coated samples exhibited the impedance at 10 mHz in the range of GΩ cm2, while scribed samples withstood the corrosion attack in a salt spray chamber for one week. Thus, albeit only about 100 nm thick, the Zr-CrCC deposited between the substrate and a 9-micrometre thick barrier sol-gel PEHA-SS coating acts as an active corrosion protection interlayer and contributes to the overall protectiveness of the multilayer system.","PeriodicalId":19270,"journal":{"name":"npj Materials Degradation","volume":null,"pages":null},"PeriodicalIF":5.1,"publicationDate":"2024-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41529-024-00467-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141165079","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

Undetected perovskite phase interference with zirconolite dissolution measurements 未检测到的透辉石相对锆英石溶解度测量的干扰

IF 5.1 2区材料科学

npj Materials Degradation Pub Date : 2024-05-25 DOI: 10.1038/s41529-024-00475-5

Thomas L. Goût, Anamul H. Mir, Simon M. Fairclough, Dimitri Pletser, Ian Farnan

{"title":"Undetected perovskite phase interference with zirconolite dissolution measurements","authors":"Thomas L. Goût, Anamul H. Mir, Simon M. Fairclough, Dimitri Pletser, Ian Farnan","doi":"10.1038/s41529-024-00475-5","DOIUrl":"10.1038/s41529-024-00475-5","url":null,"abstract":"Zirconolite ceramics present a chemically durable host matrix for waste actinides, but zirconolite dissolution rates reported in the literature often vary significantly. Here, the release of Ca and Al from a hot isostatically pressed zirconolite (Ca0.8Zr0.9Ce0.3Ti1.6Al0.4O7.0) was shown to be predominantly driven by preferential dissolution of minor perovskite and alumina phases. Both phases were undetectable by XRD, and the perovskite was difficult to detect by SEM-EDS. Whilst the zirconolite phase exhibited no signs of alteration, dissolution of the perovskite proceeded congruently without forming a hydrated altered layer or diffusion of protons into the solid that would be indicative of an ion-exchange mechanism. The weak temperature dependence of dissolution (40, 90 and 150 °C) showed that kinetics were limited by transport and a mixed transport-surface controlled reaction for Ca and Al, respectively. A significant H2O-D2O isotope effect on dissolution was observed for Ca but not for Al at all temperatures. The former was consistent with an abated rate of hydrolysis in the absence of a contribution from diffusion, whilst the latter could be attributed to differences in the activated complex for Ca and Al release through hydrolysis. These results demonstrate the role of a secondary phase perovskite in the dissolution kinetics of zirconolite even when perovskite occurs at low concentration and evades detection by bulk techniques such as XRD. This study provides a potential explanation of variations in zirconolite ceramic dissolution rates present in the literature and provides a null result to tests of an incongruent Ca release mechanism from zirconolite.","PeriodicalId":19270,"journal":{"name":"npj Materials Degradation","volume":null,"pages":null},"PeriodicalIF":5.1,"publicationDate":"2024-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41529-024-00475-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141149251","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

Preparation and properties of Mg-Nd binary alloy MAO/SiO2@α-Fe2O3 organic composite coating 镁钕二元合金 MAO/SiO2@α-Fe2O3 有机复合涂层的制备与性能

IF 5.1 2区材料科学

npj Materials Degradation Pub Date : 2024-05-23 DOI: 10.1038/s41529-024-00473-7

Qiang Sun, Quantong Jiang, Siwei Wu, Chang Liu, Heng Tang, Hao Shi, Liying Song, Jizhou Duan, Baorong Hou

{"title":"Preparation and properties of Mg-Nd binary alloy MAO/SiO2@α-Fe2O3 organic composite coating","authors":"Qiang Sun, Quantong Jiang, Siwei Wu, Chang Liu, Heng Tang, Hao Shi, Liying Song, Jizhou Duan, Baorong Hou","doi":"10.1038/s41529-024-00473-7","DOIUrl":"10.1038/s41529-024-00473-7","url":null,"abstract":"In order to make magnesium alloys better used in aviation, electronic information and other fields, it is necessary to improve their corrosion resistance and wave absorption properties. In this paper, a composite coating with corrosion resistance and wave absorption properties was prepared on magnesium alloy by micro-arc oxidation-organic coating technology. An organic absorbing coating with a thickness of about 40 μm was sprayed on the MAO coating containing Yb2O3 nanoparticles. Among them, the absorbing fillers in the organic coating are mainly SiO2 and α-Fe2O3. Three different mass ratios of SiO2 and α-Fe2O3 were set to 20%, 22.5% and 25%, respectively, to prepare three different MAO/SiO2@α-Fe2O3 organic composite coatings. The morphology, roughness, microstructure and chemical composition of the organic composite coating are characterized. The results show that after coating the organic composite coating, the roughness of the coating is significantly reduced, and the compactness and interlayer adhesion of the coating are significantly improved. The electrochemical test and SKPFM test of the organic composite coating were carried out. The results showed that with the increase of the mass ratio of SiO2 and α-Fe2O3, the corrosion resistance and stability of the organic composite coating increased, and the Volta potential also gradually moved up. The microwave absorbing properties of organic composite coatings were studied by vector network analyzer. The results show that the microwave absorbing properties of the coatings are positively correlated with the mass ratio of SiO2 and α-Fe2O3.","PeriodicalId":19270,"journal":{"name":"npj Materials Degradation","volume":null,"pages":null},"PeriodicalIF":5.1,"publicationDate":"2024-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41529-024-00473-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141103241","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