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Effect of substrate orientations on the electrochemical and localized corrosion behavior of a quad-layer Al alloy composite

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Journal of Materials Science & Technology 2024年第9期176卷 57-68页

作者： Mingyang Wang Yuanyuan Ji Da-Hai Xia Dejing Zhou Yesen Zhu Zhiming Gao zhenbo qin Wenbin Hu School of Materials Science and Engineering Tianjin UniversityTianjin 300350China Yin Bang Clad Mat Co Ltd Jiangsu Key Lab Clad MatWuxi 214145China PowerChina Huadong Engineering Corporation Limited Hangzhou 311122China

Electrochemical and localized corrosion behavior of a 4045/7072/3003 M/4045 Al alloy composite in 3.5 wt.%NaCl solution was investigated from cross-sectional and plane directions by electrochemical impedance spectroscopy,polarization curves,and high-resolution microscopic *** directions showed higher corrosion resistance than the cross-sectional surface,with almost all localized corrosion initiated from Si-containing *** cross-section showed a complex galvanic effect among the four layers,the galvanic coupling between 4045/7072 accelerated the dissolution of 7072 because 7072 served as the anode,however,the galvanic coupling between 3003 M/4045 protected 4045 from corrosion,indicating that 3003 M served as the anode.

关键词： Al alloy composite sheet Localized corrosion Electrochemical behavior

Enhancing the Stability of Passive Film on 304 SS by Chemical Modification in Alkaline Phosphate–Molybdate Solutions

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Transactions of Tianjin University 2020年第2期26卷 135-141页

作者： Chengcheng Pan Yang Song Weixian Jin zhenbo qin Shizhe Song Wenbin Hu Da-Hai Xia Tianjin Key Laboratory of Composite and Functional Materials Tianjin 300354China School of Materials Science and Engineering Tianjin UniversityTianjin 300354China Zhoushan Marine Corrosion Institute of Central Research Institute of Iron and Steel Zhoushan 316003China

The purpose of this work was to enhance the corrosion resistance of the passive fi lm on 304 stainless steel(SS)by chemical modifi cation in alkaline phosphate–molybdate *** 304 SS was passivated in both phosphate and phosphate–molybdate mixed solutions to investigate the eff ect of molybdate on its corrosion *** experimental results indicated that the passive fi lm showed better corrosion resistance in Cl?-containing solutions after modifi cation in phosphate–molybdate solutions than in phosphate-only ***-dispersive spectroscopy analyses revealed that the passive fi lm formed in phosphate–molybdate solutions contained Mo and P after modifi cation,which is the reason for the enhanced corrosion resistance.

关键词： Passive fi lm 304 SS Corrosion Phosphate Molybdate

Quantifi cation of the Atmospheric Corrosion of 304 and 2205 Stainless Steels Using Electrochemical Probes Based on Thevenin Electrochemical Equivalent Circuit Model

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Transactions of Tianjin University 2020年第3期26卷 218-227页

作者： Yu Zhu Yang Song Likun Xu zhenbo qin Shizhe Song Wenbin Hu Da-Hai Xia Tianjin Key Laboratory of Composite and Functional Materials Tianjin 300354China School of Materials Science and Engineering Tianjin UniversityTianjin 300354China State Key Laboratory for Marine Corrosion and Protection Luoyang Ship Material Research Institute(LSMRI)149-1 Zhuzhou RoadLaoshan DistrictQingdao 266101China

Stainless steel(SS)is one of the most widely used engineering materials in marine ***,its corrosion in the marine atmospheric environment due to the high concentration of Cl-is a *** SS corrosion is a threat to the development and security of marine industry;therefore,evaluating the corrosion resistance of SSs is *** this work,atmospheric corrosion detection probes based on a symmetrical electrode system were used to study the corrosion behaviors of 304 SS and 2205 duplex stainless steel(DSS)in a simulated marine atmosphere.A theoretical model for electrochemical noise(EN)data analysis based on the Thevenin electrochemical equivalent circuit(EEC)model was *** relationship between the EN characteristic parameters and the corrosion rate was *** Thevenin EEC model analysis showed that the relationship between the noise resistance(Rn),the noise impedance[Rsn(f)],and the impedance modulus(|Z(f)|)was Rn≈Rsn=■.Thus,Rn and Rsn can be used as indicators for quantitative corrosion *** results of EN detection for the 304 SS and 2205 DSS showed that in a simulated marine atmospheric environment,the passive fi lms on the two SSs were relatively intact at the initial exposure stage,and their dissolution rates were *** corrosion resistance of the 2205 DSS was higher than that of the 304 *** the deposition of Cl-on the SS surface,pitting was initiated and the dissolution rate *** pitting initiation process on the SS surface was random,and part of the active pores could be repassivated.

关键词： Atmospheric corrosion Stainless steel Electrochemical noise Thevenin electrochemical equivalent circuit Passive film

Review-material degradation assessed by digital image processing:Fundamentals,progresses,and challenges

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Journal of Materials Science & Technology 2020年第18期52卷 146-162页

作者： Da-Hai Xia Shizhe Song Lei Tao zhenbo qin Zhong Wu Zhiming Gao Jihui Wang Wenbin Hu Yashar Behnamian Jing-Li Luo Tianjin Key Laboratory of Composite and Functional Materials Tianjin 300354China School of Materials Science and Engineering Tianjin UniversityTianjin 300354China CNOOC Tianjin Chemical Research&Design Institute Co.Ltd Tianjin 300131China Department of Chemical and Materials Engineering University of AlbertaEdmontonAlbertaT6G 1H9Canada

Material degradation is accompanied by the changes in surface structure,morphology,and *** changes can be recorded by a variety of image acquisition devices that export digital images in grayscale or true color to a *** regarding corrosion type and extent can be extracted with image processing *** paper provides a comprehensive review of material degradation assessed by digital image *** image processing systems used to assess material degradation are briefly reviewed,and the algorithms developed to process metallic materials degradation images are *** and electrochemical methods that can be used to support digital image processing results are summarized,and future work that will augment the present methods of evaluating material degradation are discussed.

关键词： Image processing Material degradation Corrosion Pitting Fuzzy K-S entropy

Research prospects of graphene-based catalyst for seawater electrolysis

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Materials Futures

Materials Futures 2023年第4期2卷 80-97页

作者： Xinyu Li Yingjie Liu Yanhui Feng Yunwei Tong zhenbo qin Zhong Wu Yida Deng Wenbin Hu Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education Tianjin University Tianjin 300072People’s Republic of China Key Laboratory of Composite and Functional Materials School of Material Science and Engineering Tianjin UniversityTianjin 300072People’s Republic of China State Key Laboratory of Marine Resource Utilization in South China Sea School of Materials Science and EngineeringHainan UniversityHaikou 570228People’s Republic of China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin University Binhai New CityFuzhou 350207People’s Republic of China

Seawater has obvious resource reserve advantages compared to fresh water,and so the huge potential advantages for large-scale electrolysis of hydrogen production has been paid more attention to;but at the same time,electrolysis of seawater requires more stable and active catalysts to deal with seawater corrosion ***-based materials are very suitable as composite supports for catalysts due to their high electrical conductivity,specific surface area,and ***,the review introduces the problems faced by seawater electrolysis for hydrogen production and the various catalysts *** them,the advantages of catalysis of graphene-based catalysts and the methods of enhancement the catalytic performance of graphene are ***,the development direction of composite catalysts is prospected,hoping to provide guidance for the preparation of more efficient electrocatalysts for seawater electrolysis.

关键词： graphene seawater electrolysis catalyst

Heterogeneous lamellar-edged Fe-Ni(OH)_(2)/Ni_(3)S_(2)nanoarray for efficient and stable seawater oxidation

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Nano Research 2021年第4期14卷 1149-1155页

作者： Baihua Cui Zheng Hu Chang Liu Siliang Liu Fangshuai Chen Shi Hu Jinfeng Zhang Wei Zhou Yida Deng zhenbo qin Zhong Wu Yanan Chen Lifeng Cui Wenbin Hu School of Materials Science and Engineering Dongguan University of TechnologyDongguan 523808China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityFuzhou 350207China School of Materials Science and Engineering Tianjin UniversityTianjin 300372China School of Science Tianjin UniversityTianjin 300072China

Development of efficient non-precious catalysts for seawater electrolysis is of great significance but challenging due to the sluggish kinetics of oxygen evolution reaction(OER)and the impairment of chlorine electrochemistry at ***,we report a heterostructure of Ni_(3)S_(2)nanoarray with secondary Fe-Ni(OH)_(2)lamellar edges that exposes abundant active sites towards seawater *** resultant Fe-Ni(OH)_(2)/Ni_(3)S_(2)nanoarray works directly as a free-standing anodic electrode in alkaline artificial *** only requires an overpotential of 269 mV to afford a current density of 10 mA·cm^(-2)and the Tafel slope is as low as 46 m V·dec^(-1).The 27-hour chronopotentiometry operated at high current density of 100 mA·cm^(-2)shows negligible deterioration,suggesting good stability of the Fe-Ni(OH)_(2)/Ni_(3)S_(2)@NF *** efficiency for oxygen evolution is up to〜95%,revealing decent selectivity of the catalyst in saline *** desirable catalytic performance could be benefitted from the introduction of Fe activator and the heterostructure that offers massive active and selective *** density functional theory(DFT)calculations indicate that the OER has lower theoretical overpotential than Cl_(2) evolution reaction in Fe sites,which is contrary to that of Ni *** experimental and theoretical study provides a strong support for the rational design of high-performance Fe-based electrodes for industrial seawater electrolysis.

关键词： lamellar edges Fe-Ni(OH)_(2)/Ni_(3)S_(2) seaw ater oxidation chlorine electrochem istry electrocatalysis

Recent progress in inhibition of hydrogen evolution reaction in alkaline Al-air batteries

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National Science Open 2024年第6期3卷 42-67页

作者： Yingjie Liu Zhong Wu zhenbo qin Yichun Liu Wenbin Hu Tianjin Key Laboratory of Composite and Functional Material Key Laboratory of Advanced Ceramics and Machining Technology(Ministry of Education)School of Materials Science and EngineeringTianjin UniversityTianjin 300350China School of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093China

Alkaline Al-air batteries(AABs)have attracted considerate attention due to their high theoretical capacity density and energy density with intrinsic safety and low ***,severe hydrogen evolution reaction(HER)decreases the discharge performance and increases usage risk,which restricts the development of *** this comprehensive review,a systematic overview of progress in inhibition methods of HER is provided,including anodic alloying,structural treatment,surface modification,additives and non-aqueous *** them,the most efficient method is additives,which was simple and provided the highest inhibition ***,suggestions and perspectives for future research are offered on improving the commercial application potential of AABs,providing guidance for aqueous metal-air batteries.

关键词： Al-air battery hydrogen evolution reaction anode electrolyte additive capacity density

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基于归一化算法的一维标定物多相机标定

光学学报 2019年第4期39卷 247-254页

作者：全燕鸣覃镇波李维诗张瑞华南理工大学机械与汽车工程学院广东广州510640 合肥工业大学广东研究院智能检测团队广东佛山528137

为了提高多相机一维标定的精度,提出了一种基于归一化算法的分层逐步标定法,由基本矩阵获得射影投影矩阵,进而转换成度量投影矩阵。对标定物图像特征点的坐标进行归一化预处理,以提高标定精度,同时又保持线性方法快速、易实现的优点。... 详细信息

为了提高多相机一维标定的精度,提出了一种基于归一化算法的分层逐步标定法,由基本矩阵获得射影投影矩阵,进而转换成度量投影矩阵。对标定物图像特征点的坐标进行归一化预处理,以提高标定精度,同时又保持线性方法快速、易实现的优点。在所提标定方法中,一维标定物可自由运动,不受场地环境约束,使用灵活。通过仿真和真实实验,验证了归一化特征点坐标可以显著提高标定结果的精度和稳健性。

关键词：机器视觉一维标定物多相机标定归一化算法

强磁靶共溅射法制备具有室温磁电阻特性的Co-TiO2纳米复合薄膜

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无机材料学报 2020年第11期35卷 1263-1267页

作者：陈浩禹张亦文吴忠秦真波吴姗姗胡文彬天津大学材料科学与工程学院天津300072

Co-TiO2纳米复合薄膜作为一种新型自旋电子材料,由于具有良好的生物相容性,近年来受到广泛关注。但在制备过程中,磁性金属Co处于氧化气氛,容易部分氧化,从而影响薄膜的隧道磁电阻性能。为了抑制磁性金属的氧化,提高金属态含量,本研究通... 详细信息

Co-TiO2纳米复合薄膜作为一种新型自旋电子材料,由于具有良好的生物相容性,近年来受到广泛关注。但在制备过程中,磁性金属Co处于氧化气氛,容易部分氧化,从而影响薄膜的隧道磁电阻性能。为了抑制磁性金属的氧化,提高金属态含量,本研究通过强磁靶共溅射法制备了Co-TiO2纳米复合薄膜。该方法采用的强磁靶头,磁场强度高、分布均匀,可以提高溅射粒子的能量和溅射速率,降低因高能粒子碰撞而发生氧化的概率。因此强磁靶共溅射法能明显抑制金属Co的氧化,提高纳米复合薄膜的自旋极化率。所制备的Co-TiO2纳米复合薄膜主要由非晶态的TiO2基体和分散其中的Co颗粒组成。通过调节金属Co颗粒尺寸和分布状态,在电学上实现了金属态向绝缘态转变,在磁学上实现了铁磁性向超顺磁性转变。Co含量为51.3at%时,Co-TiO2纳米复合薄膜表现为高金属态和高电阻率,并且实现了高达8.25%的室温隧道磁电阻。强磁靶共溅射法使Co-TiO2纳米复合薄膜的室温磁电阻性能得到了进一步提高,这对于磁性金属—氧化物纳米复合薄膜的研究有着重要的意义。

关键词：纳米复合薄膜强磁靶共溅射法室温隧道磁电阻 Co-TiO2