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Exfoliation Corrosion of As‑Extruded Mg–1Li–1Ca:the Influence of the Superficial Layer

Acta Metallurgica Sinica(English Letters) 2024年第8期37卷 1339-1353页

作者： Ze‑Song Wei Zi‑You Ding Lei Cai Shao‑Xia Ma Dong‑Qing Zhao lan‑yue cui Cheng‑Bao Liu Yuan‑Sheng Yang Yuan‑Ding Huang Rong‑Chang Zeng Corrosion Laboratory for Light Metals College of Materials Science and EngineeringShandong University of Science and TechnologyQingdao 266590China Engineering Research Center for Magnesium‑Based New Materials Center for Advancing Materials Performance from the Nanoscale(CAMP‑Nano)State Key Laboratory for Mechanical Behavior of MaterialsXi’an Jiaotong UniversityXi’an 710049China Shandong Provincial Key Laboratory of High Strength Lightweight Metallic Materials Advanced Materials InstituteQilu University of Technology(Shandong Academy of Sciences)Jinan 250014China Institute of Metals Research Chinese Academy of SciencesShenyang 110016China Institute of Metallic Biomaterials Helmholtz-Zentrum HereonMax‑Planck‑Str.121502 GeesthachtGermany

Exfoliation corrosion(EFC)has rarely been reported for wrought magnesium *** EFC of the as-extruded Mg–1Li–1Ca alloy was observed after the removal of outermost fine-grained *** microstructure and corrosion products were investigated using optical microscopy,scanning electron microscopy,electron backscattered diffraction,X-ray diffraction,and Fourier transform infrared *** corrosion behavior was analyzed using electrochemical polarization,electrochemical impedance spectroscopy,and scanning Kelvin probe *** results indicated that the surface of Mg–1Li–1Ca,with the superficial layer removed,was more susceptible to EFC.A linear correlation between grain boundary density and corrosion resistance was ***,the influence of factors such as grain size,intermetallic compounds,different alloy surfaces,and corrosion products on EFC were discussed,and the corresponding EFC mechanism was clarified.

关键词： Magnesium alloys Exfoliation corrosion Microstructure Intermetallic compound Metamorphic skin

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通过调控表面石墨烯-环氧树脂复合涂层的仿生界面和取向以提高镁合金的防腐和热/电性能

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Transactions of Nonferrous Metals Society of China 2024年第1期34卷 157-170页

作者：隋普升刘成宝张爱猛孙聪崔蓝月曾荣昌山东科技大学材料科学与工程学院青岛266590 郑州大学材料科学与工程学院郑州450002

通过旋涂方法制备具有“砖泥”结构的仿生石墨烯−环氧树脂复合涂层。合成咪唑基离子液体修饰的石墨烯(GI)以改善石墨烯(G)和环氧树脂之间的界面相容性。通过扫描电镜、拉曼光谱、X射线光电子能谱和傅里叶变换红外光谱观察和分析其表面... 详细信息

通过旋涂方法制备具有“砖泥”结构的仿生石墨烯−环氧树脂复合涂层。合成咪唑基离子液体修饰的石墨烯(GI)以改善石墨烯(G)和环氧树脂之间的界面相容性。通过扫描电镜、拉曼光谱、X射线光电子能谱和傅里叶变换红外光谱观察和分析其表面形貌和化学结构,利用热成像仪记录表面温度变化,通过体积表面积电阻率测试仪和激光闪点法分别测定涂层的表面电阻率和导热系数,通过电化学阻抗谱和盐雾腐蚀试验表征其耐蚀性。复合涂层中的GI层呈现出近似平行的取向,从而提高热传导和静电耗散效率。穿过平面的导热系数和表面电阻率分别为0.77 W·m^(−1)·K^(−1)和1.6×10^(6)Ω·cm。电化学阻抗谱测试表明,经过40 d的浸泡,涂层的低频模量达到6.76×10^(10)Ω·cm^(2),比纯环氧涂层提高约2个数量级,表现出优异的耐腐蚀性。

关键词：仿生结构复合涂层镁合金石墨烯取向耐蚀性

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Corrosion Resistance of Superhydrophobic Mg-Al Layered Double Hydroxide Coatings on Aluminum Alloys

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Acta Metallurgica Sinica(English Letters) 2015年第11期28卷 1373-1381页

作者： Fen Zhang Chang-Lei Zhang Liang Song Rong-Chang Zeng lan-yue cui Hong-Zhi cui College of Materials Science and Engineering Shandong University of Science and Technology State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology Shandong University of Science and Technology Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Sciences

A superhydrophobic surface was successfully constructed to modify the layered double hydroxide （LDH） coatings on aluminum alloy using stearic acid. The characteristics of the coatings were investigated using SEM, XRD, FT- IR and XPS. The corrosion resistance of the prepared coatings was studied using potentiodynamic polarization and electrochemical impedance spectrum. The results revealed that the superhydrophobic surface considerably improved the corrosion-resistant performance of the LDH coatings on the aluminum alloy substrate. The formation mechanism of the superhydrophobic surface was proposed.

关键词： Aluminum alloy Layered double hydroxide Superhydrophobic Stearic acid Corrosion

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草酸预处理AM50镁合金表面快速原位制备蒸汽Mg−Al LDH涂层的耐蚀性

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Transactions of Nonferrous Metals Society of China 2024年第6期34卷 1843-1863页

作者：潘仕琪王金梦张芬解浩峰崔蓝月 MBOBBY KANNAN 邹玉红曾荣昌山东科技大学材料科学与工程学院轻金属腐蚀实验室青岛266590 有研工程技术研究院有限公司有色金属材料制备加工国家重点实验室北京100088 School of Engineering University of NewcastleCallaghanNew South Wales2308Australia 山东科技大学化学与环境工程学院青岛266590 郑州大学材料科学与工程学院郑州450002

通过暴露合金表面的金属间化合物(β-Mg17Al12和AlMn),研究草酸(OA)酸洗对AM50镁合金表面原位蒸汽Mg−Al层状双氢氧化物(LDH)涂层成膜机制和耐蚀性的影响。结果表明,OA预处理使镁合金表面金属间化合物比例显著增加,Mg−Al LDH在Al−Mn相周... 详细信息

通过暴露合金表面的金属间化合物(β-Mg17Al12和AlMn),研究草酸(OA)酸洗对AM50镁合金表面原位蒸汽Mg−Al层状双氢氧化物(LDH)涂层成膜机制和耐蚀性的影响。结果表明,OA预处理使镁合金表面金属间化合物比例显著增加,Mg−Al LDH在Al−Mn相周围成核并生长。当酸洗时间为45 s时,所得LDH涂层的厚度最大、耐蚀性最佳,与基体相比,其腐蚀电流密度降低3个数量级。最后,提出了AM50镁合金表面Mg−Al LDH涂层的成膜机制。

关键词：镁合金草酸金属间化合物蒸汽涂层层状双氢氧化物耐蚀性

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Robust damage warning and healing tracing strategy for anticorrosion coatings on magnesium alloy AZ31enabled by polydopamine fluorophores

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Journal of Materials Science & Technology 2023年第21期152卷 169-180页

作者： Chengbao Liu Li Cheng lan-yue cui Peimin Hou Bei Qian Rong-Chang Zeng College of Materials Science and Engineering Shandong University of Science and TechnologyQingdao 266590China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Marine Coatings Marine Chemical Research InstituteQingdao 266071China College of Chemistry and Pharmaceutical Sciences Qingdao Agricultural UniversityQingdao 266109China

Polymeric coatings are susceptible to microdefects that are difficult to detect thus leading to premature failure of metallic components or even catastrophic *** obtaining considerable progress in damage healing and detecting,it is still challenging for anticorrosion coating to realize warning the damage generation and tracing the healing process *** article validates a robust strategy based on damage-induced fluorescence enhancement effect to visualize dynamic damage-healing processes in anticorrosion coatings on magnesium alloy *** embedding fluorescent poly-dopamine nanoparticles into thermo-responsive epoxy resin,immediate fluorescence was intensified at coating *** electrochemical impedance and salt spray results proved that the prepared coating possessed pronounced healing and corrosion protection capability with near-infrared ***,the healing behavior can be traced and visualized based on the decrease in fluorescence *** work opens a new avenue to monitor the failure and self-healing mechanism of anticorrosion coatings,providing guideline for engineering of next generation smart protection materials.

关键词： Damage warning Healing tracing Corrosion protection Photothermal conversion Coating

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Advance in Antibacterial Magnesium Alloys and Surface Coatings on Magnesium Alloys:A Review

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Acta Metallurgica Sinica(English Letters) 2020年第5期33卷 615-629页

作者： Yang Shao Rong-Chang Zeng Shuo-Qi Li lan-yue cui Yu-Hong Zou Shao-Kang Guan Yu-Feng Zheng Corrosion Laboratory for Light Metals College of Materials Science and EngineeringShandong University of Science and TechnologyQingdao 266590China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450002China College of Chemical and Environmental Engineering Shandong University of Science and TechnologyQingdao 266590China Department of Materials Science and Engineering College of EngineeringPeking UniversityBeijing 100871China

Magnesium(Mg)alloys as a bioabsorbable light metal have shown great clinical potential as bone replacement *** this review,the categories,progress in cutting-edge preparation technologies and antibacterial mechanisms of Mg alloys and considerable numbers of corrosion-resistant and functional coatings are *** relationship among the microstructure(grain size,intermetallic compounds),biocorrosion resistance and biocompatibility for antibacterial Mg alloys is *** challenge and outlooks of biomedical Mg alloys and coatings are proposed from an antibacterial perspective.

关键词： Magnesium alloys Antibacterial properties Coatings Degradation Biomaterial

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In vitro corrosion of Mg-Ca alloy- The influence of glucose content

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Frontiers of Materials Science 2017年第3期11卷 284-295页

作者： lan-yue cui Xiao-Ting LI Rong-Chang ZENG Shuo-Qi LI En-Hou HAN Liang SONG College of Materials Science and Engineering Shandong University of Science and Technology Qingdao 266590 China National Engineering Center for Corrosion Control Institute of Metals Research Chinese Academy of Sciences Shenyang 110016 China

Influence of glucose on corrosion of biomedical Mg-1.35Ca alloy was made using hydrogen evolution, pH and electrochemical polarization in isotonic saline solution. The corrosion morphologies, compositions and structures were probed by virtue of SEM, EDS, FTIR, XRD and XPS. Results indicate that the glucose accelerated the corrosion of the alloy. The elemental Ca has no visible effect on the corrosion mechanism of glucose for the Mg-1.35Ca alloy in comparison with pure Mg. In addition, the presence of CO2 has beneficial effect against corrosion due to the formation of a layer of carbonate- containing products.

关键词： magnesium corrosion glucose biomaterial

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Corrosion resistance of biodegradable polymeric layer-by-layer coatings on magnesium alloy AZ31

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Frontiers of Materials Science 2016年第2期10卷 134-146页

作者： lan-yue cui Rong-Chang ZENG Xiao-Xiao ZHU Ting-Ting PANG Shuo-Qi LI Fen ZHANG College of Materials Science and Engineering Shandong University of Science and Technology Qingdao 266590 China State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology Shandong University of Science and Technology Qingdao 266590 China

Biocompatible polyelectrolyte multilayers （PEMs） and polysiloxane hybrid coatings were prepared to improve the corrosion resistance of biodegradable Mg alloy AZ31. The PEMs, which contained alternating poly（sodium 4-styrenesulfonate）（PSS） and poly（allylamine hydrochloride）（PAH）, were first self-assembled on the surface of the AZ31 alloy substrate via electrostatic interactions, designated as （PAH/PSS）s/AZ31. Then, the （PAH/PSS）5/AZ31 samples were dipped into a methyltrimethoxysilane （MTMS） solution to fabricate the PMTMS films, designated as PMTMS/（PAH/PSS）5/AZ31. The surface morphologies, microstructures and chemical compositions of the films were investigated by FE-SEM, FTIR, XRD and XPS. Potentiodynamic polarization, electro- chemical impedance spectroscopy and hydrogen evolution measurements demonstrated that the PMTMS/（PAH/PSS）s/AZ31 composite film significantly enhanced the corrosion resistance of the AZ31 alloy in Hank＇s balanced salt solution （HBSS）. The PAH and PSS films effectively improved the deposition of Ca-P compounds including Ca3（PO4）2 and hydroxyapatite （HA）. Moreover, the corrosion mechanism of the composite coating was discussed. These coatings could be an alternative candidate coating for biodegradable Mg alloys.

关键词： magnesium alloy polyelectrolyte polysiloxane corrosion layer-by-layer

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Corrosion resistance and mechanisms of smart micro-arc oxidation/epoxy resin coatings on AZ31 Mg alloy: Strategic positioning of nanocontainers

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Journal of Magnesium and Alloys 2023年第12期11卷 4562-4574页

作者： Ai-meng Zhang Chengbao Liu Pu-sheng Sui Cong Sun lan-yue cui M.Bobby Kannan Rong-Chang Zeng College of Materials Science and Engineering Shandong University of Science and TechnologyQingdao 266590China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450002China School of Engineering University of NewcastleCallaghanNew South Wales 2308Australia

Smart micro-arc oxidation(MAO)/epoxy resin(EP) composite coatings were formed on AZ31 magnesium(Mg) alloy. Mesoporous silica nanocontainers(MSN) encapsulated with sodium benzoate(SB) corrosion inhibitors were strategically incorporated in the MAO micropores and in the top EP layer. The influence of the strategic positioning of the nanocontainers on the corrosion protective performance of coating was investigated. The experimental results and analysis indicated that the superior corrosion resistance of the hybrid coating is ascribed to the protection mechanisms of the nanocontainers. This involves two phenomena:(1) the presence of the nanocontainers in the MAO micropores decreased the distance between MSN@SB and the substrate, demonstrating a low admittance value(^5.18 × 10^(-8)Ω^(-1)), and thus exhibiting significant corrosion inhibition and self-healing function;and(2) the addition of nanocontainers in the top EP layer densified the coating via sealing of the inherent defects, and hence the coating maintained higher resistance even after 90 days of immersion(1.13 × 10^(10)Ω cm^(2)).However, the possibility of corrosion inhibitors located away from the substrate transport to the substrate is reduced, reducing its effective utilization rate. This work demonstrates the importance of the positioning of nanocontainers in the coating for enhanced corrosion resistance,and thereby providing a novel perspective for the design of smart protective coatings through regulating the distribution of nanocontainers in the coatings.

关键词： Nanocontainers Self-healing coating Micro-arc oxidation Corrosion protection Magnesium alloys

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Exfoliation corrosion of extruded Mg-Li-Ca alloy

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Journal of Materials Science & Technology 2018年第9期34卷 1550-1557页

作者： Zi-You Ding lan-yue cui Rong-Chang Zeng Yan-Bin Zhao Shao-Kang Guan Dao-Kui Xu Cun-Guo Lin College of Materials Science and Engineering Shandong University of Science and Technology Qingdao 266590 China School of Materials Science and Engineering Zhengzhou University Zhengzhou 450002 China CAS Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China Science and Technology on Marine Corrosion and Protection Laboratory Qingdao 266071 China Qingdao Branch of Luoyang Ship Material Research Institute Qingdao 266101 China

Exfoliation on as-extruded Mg-1 Li-1 Ca magnesium alloy was investigated after an immersion in 3.5 wt%NaCl aqueous solution for 90, 120 and 150 days through optical microscope, digital camera, scanning electron microscope, electrochemical workstation, scanning Kalvin probe, X-ray diffraction and Fourier transform infrared spectroscope. The results demonstrated that exfoliation corrosion occurred on extruded Mg-1 Li-1 Ca alloy due to elongated microstructure parallel to surface, and delamination of lamellar structure resulted from galvanic effect and wedge effect. Skin layer with fine grains exhibited better corrosion resistance, whereas the interior with coarse grains and the intermetallic compound,Mg2 Ca particles existing in a fibrous structure, dispersed along grain boundaries and extrusion direction in a line. Furthermore, galvanic effect between Mg2 Ca particles and their neighboring a-Mg matrix facilitated dissolution of Mg2 Ca particles and a-Mg matrix; wedge effect was caused by formation of corrosion products. Exfoliation corrosion of extruded Mg-Li-Ca alloys might be a synergic effect of pitting corrosion,filiform corrosion, intergranular corrosion and stress corrosion. Finally, exfoliation corrosion mechanism was proposed.

关键词： Magnesium-lithium alloy Exfoliation corrosion Intermetallic compound Extrusion Microstructure

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