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Journal of Magnesium and Alloys 2024年第1期12卷 120-138页

作者： Zhao-Qi Zhang Bing-Zhi Li Pei-Duo Tong Shao-Kang Guan Li Wang Zheng-Hui Qiu Cun-Guo Lin rong-chang zeng School of Material Science and Engineering&Henan Key Laboratory of Advanced Magnesium Alloy&Key Laboratory of Materials Processing and Mold Technology(Ministry of Education) Zhengzhou University100 Science RoadZhengzhou 450001China State Key Laboratory for Marine Corrosion and Protection Luoyang Ship Material Research InstituteQingdao 266101China Corrosion Laboratory for Light Metals College of Material Science and EngineeringShandong University of Science and TechnologyQingdao 266590China

Constructing a functional hybrid coating appears to be a promising strategy for addressing the poor corrosion resistance and insufficient endothelialization of Mg-based ***,the steps for preparing composite coatings are usually complicated and ***,a novel composite coating,composed of bioactive magnesium thioctic acid(MTA)layer formed by deposition and corrosion-resistant magnesium hydroxide(Mg(OH)_(2))layer grown in situ,is simply fabricated on ZE21B alloys via one-step *** electron microscopy(SEM)shows that the electrodeposited coating has a compact and uniform *** the high adhesion of the MTA/Mg(OH)_(2)hybrid coating is also confirmed by the micro-scratch *** test,scanning kelvin probe(SKP),and hydrogen evolution measurement indicate that the hybrid coating effectively reduces the degradation rate of Mg *** experiment and cell culture trial detect that the composite coating is of fine ***,the preparation mechanism of MTA/Mg(OH)_(2)hybrid coatings is discussed and *** coating shows a great potential application for cardiovascular stents.

关键词： Magnesium alloy Corrosion resistance Hybrid coating Endothelialization Biocompatibility

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

Advances in Mg-Al-layered double hydroxide steam coatings on Mg alloys:A review

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Journal of Magnesium and Alloys 2023年第5期11卷 1505-1518页

作者： Shi-Qi Pan Fen Zhang Cuie Wen rong-chang zeng Corrosion Laboratory for Light Metals College of Materials Science and EngineeringShandong University of Science and TechnologyQingdao 266590China School of Engineering RMIT UniversityMelbourneVictoria3001Australia School of Materials Science and Engineering Zhengzhou UniversityZhengzhou450002China

Layered double hydroxide(LDH)coatings on magnesium(Mg)alloys shine brightly in the field of corrosion protection because of their special ion-exchange ***-of-the-art steam coating as a type of LDH film preparation technique has emerged in recent years because only pure water is required as the steam source and its environmentally friendly LDH coating fits the current need for green ***,this coating can effectively inhibit the corrosion of the Mg alloy substrate due to the chemical bonding between the coating and the Mg alloy *** review systematically explains cutting-edge advancements in the growth mechanism and corrosion behavior of LDH steam coatings,and analyzes the advantages and limitations of the steam-coating *** influencing factors including pressure,CO_(2)/CO_(3)^(2-),aluminum content of the substrate alloy,solution type,and acid-pickling pretreatment,as well as the post-treatment of steam-coating defects,are comprehensively elucidated,providing new insights into the development of the in situ steam-coating ***,existing issues and future prospects are discussed to further accelerate the widespread application of Mg alloys.

关键词： Corrosion Layered double hydroxide(LDH) Mg alloy Steam coating Surface modification

Advances in hydroxyapatite coatings on biodegradable magnesium and its alloys

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Journal of Magnesium and Alloys 2022年第5期10卷 1154-1170页

作者： Ai-Meng Zhang Praneesh Lenin rong-chang zeng M.Bobby Kannan College of Materials Science and Engineering Shandong University of Science and TechnologyQingdao 266590China School of Mechanical Engineering Vellore Institute of TechnologyVelloreTamil Nadu 632014India School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450002China School of Engineering University of NewcastleCallaghanNew South Wales 2308Australia

Magnesium is a candidate metal for biodegradable implant applications for its biodegradation tendency and excellent ***,the high degradation rate of magnesium and also its localized degradation in physiological conditions are the main issues for its successful implant *** degradation rate of magnesium has been reduced to some degree via alloying,but the localized degradation susceptibility is a great *** many years,hydroxyapatite(HAp),a biocompatible ceramic material,has been extensively used for bio-implant ***,a substantial amount of research has been carried out on coating HAp on magnesium-based materials for improved degradation resistance in particular and also to enhance the *** review article focuses on the different methods of HAp coating on magnesium-based materials and also the recent cutting-edge advancements made in the coating process for improved degradation resistance and *** mechanical stability of the HAp coated magnesium-based materials is also discussed.

关键词： Hydroxyapatite Magnesium Biomaterials Biodegradation Coating

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

Enhanced corrosion resistance,antibacterial activity and biocompatibility of gentamicin-montmorillonite coating on Mg alloy-in vitro and in vivo studies

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Journal of Materials Science & Technology 2022年第16期111卷 167-180页

作者： Lijun Fan Wenxin Sun Yuhong Zou Qian-qian Xu rong-chang zeng Jingrui Tian Department of Bioengineering College of Chemical and Biological EngineeringShandong University of Science and TechnologyQingdao 266590China Light Alloy Corrosion Laboratory College of Materials Science and EngineeringShandong University of Science and TechnologyQingdao 266590China Hospital of Shandong University of Science and Technology Qingdao 266590China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450002China

Implant-associate infection(IAI)is a major cause of failure of bone implant materials,and one of the significant challenges in clinical managements.A synergistic coating strategy combining montmorillonite(MMT)sustained release,adsorption of bacteria and gentamicin(GS)bactericidal is proposed herein to tackle infection *** morphology,microstructure and chemical composition of the samples were investigated using SEM,XRD,FT-IR and *** experiments and immersion experiments reveal that corrosion resistance of Mg samples with GS/MMT coatings was higher than that of bare Mg alloy substrate in DMEM *** vitro studies demonstrated that the GS/MMT coating had a significant inhibitory effect on Escherichia coli(***)and Staphylococcus aureus(***).The viability of MC3T3-E1 cells was 92.7%after a co-culturing for 72 *** a subcutaneous transplantation of 90days,the survival rate was 100%for GS/MMT-coated Mg alloy specimens with no infection at the implantation sites and no toxic damage to liver,kidney and local muscles pathological *** study provides a novel method for the preparation of sustained-release antimicrobial coatings on biodegradable Mg alloys as promising candidates for orthopedic implant materials.

关键词： Magnesium alloy Montmorillonite Gentamicin Antibacterial activity Coating

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

Protein conformation and electric attraction adsorption mechanisms on anodized magnesium alloy by molecular dynamics simulations

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Journal of Magnesium and Alloys 2022年第11期10卷 3143-3155页

作者： Zhao-Qi Zhang Hong-Yan Wang Li Wang Xiao-Bo Chen Shao-Kang Guan Cun-Guo Lin rong-chang zeng Corrosion Laboratory for Light Metals College of Material Science and EngineeringShandong University of Science and TechnologyQingdao 266590China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450002China State Key Laboratory for Marine Corrosion and Protection Luoyang Ship Material Research InstituteQingdao 266101China School of Engineering RMIT UniversityCarlton VIC 3053Australia

Protein adsorption preferentially occurs and significantly affects the physicochemical reactions once the biodegradable magnesium alloys as bone replacements have been implanted. To date, interactions mechanisms between Mg implants and proteins remain unclear at a molecular level. Thereby, a combination of molecular dynamic(MD) simulations and experimental exploration is used to investigate the adsorption behavior and conformational change of bovine serum albumin(BSA), a representative protein of blood plasma, upon the surface of microarc oxidation(MAO) coated Mg alloy AZ31. The influences of absorbed proteins on the cytocompatibility of MAO coating are evaluated by virtue of cytotoxicity assay. Results indicate that the negatively charged O atoms(BSA) exhibit strong interaction with Mg^(2+) ions of Mg(OH)_(2), revealing that BSA molecules are ionically adsorbed on the AZ31 surface. Interestingly, MD simulation reveals that MAO coating demonstrates superior ability to capture BSA molecules during the process of adsorption owing to strong electric attraction between the negatively charged O atoms in BSA molecules with Mg atoms of MgO in MAO coating. Moreover, the α-helix part of absorbed BSA molecules on AZ31 substrate and MAO coating markedly decreases with an increase in β-sheet, β-turn and unordered contents, which is attributed to the reduction in the number of hydrogen bonds in BSA molecules. Furthermore, the adsorbed BSA molecules improve the cytocompatibility of MAO coating since the positively charged-NH_(3)^(+) group and β-sheet content of absorbed BSA molecules mediate the cell adhesion by interacting with the negatively charged cell membrane.

关键词： Magnesium alloy Molecular dynamics simulations Protein Conformation Biomaterial

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

Corrosion resistance of Mg-Al-LDH steam coating on AZ80 Mg alloy:Effects of citric acid pretreatment and intermetallic compounds

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Journal of Magnesium and Alloys 2023年第8期11卷 2967-2979页

作者： Jin-Meng Wang Xiang Sun Liang Song M.Bobby Kannan Fen Zhang Lan-Yue Cui Yu-Hong Zou Shuo-Qi Li rong-chang zeng Corrosion Laboratory for Light Metals College of Materials Science and EngineeringShandong University of Science and TechnologyQingdao 266590China School of Engineering University of NewcastleCallaghanNew South Wales 2308Australia College of Science and Engineering James Cook UniversityTownsvilleQueensland 4811Australia College of Chemical and Environmental Engineering Shandong University of Science and TechnologyQingdao 266590China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450002China

In this study,the effects of intermetallic compounds(Mg_(17)Al_(12)and Al_(8)Mn_(5))on the Mg-Al layered double hydroxide(LDH)formation mechanism and corrosion behavior of an in-situ LDH/Mg(OH)_(2)steam coatings on AZ80 Mg alloy were *** acid(CA)was used to activate the alloy surface during the pretreatment *** alloy was first pretreated with CA and then subjected to a hydrothermal process using ultrapure water to produce Mg-Al-LDH/Mg(OH)_(2)steam *** effect of different time of acid pretreatment on the activation of the intermetallic compounds was *** microstructure and elemental composition of the obtained coatings were analyzed using FE-SEM,EDS,XRD and *** corrosion resistance of the coated samples was evaluated using different techniques,i.e.,potentiodynamic polarization(PDP),electrochemical impedance spectrum(EIS)and hydrogen evolution *** results indicated that the CA pretreatment significantly influenced the activity of the alloy surface by exposing the intermetallic *** surface area fraction of Mg_(17)Al_(12)and Al_(8)Mn_(5)phases on the surface of the alloy was significantly higher after the CA pretreatment,and thus promoted the growth of the subsequent Mg-Al-LDH *** CA pretreatment for 30 s resulted in a denser and thicker LDH *** in the CA pretreatment time significantly led to the improvement in corrosion resistance of the coated AZ80 *** corrosion current density of the coated alloy was lower by three orders of magnitude as compared to the uncoated alloy.

关键词： Magnesium alloy Citric acid pretreatment Steam coating Layered double hydroxide Intermetallic compounds Corrosion resistance