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Monitoring the Diffusion Layer During Passive Film Breakdown on Alloy 800 with Digital Holography

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Acta Metallurgica Sinica(English Letters) 2015年第9期28卷 1170-1174页

作者： da-hai xia Jing-Li Luo Zhi-Ming Gao Bo-Yu Yuan Liang Li Chao Wang Tianjin Key Laboratory of Composite and Functional Materials Tianjin University School of Materials Science and Engineering Tianjin University Department of Chemical and Materials Engineering University of Alberta School of Physics and Electronic Engineering Jiangsu Normal University School of Chemistry and Chemical Engineering Jiangsu Normal University

The effects of chloride and thiosulfate ions on localized corrosion of alloy 800 are investigated through dynamical observation of the change in phase image of the diffusion layer during passive film breakdown using digital holography. The results indicate that solution chemistry has a significant effect on film breakdown and diffusion layer. The phase distribution changes at different applied potentials show that in the process of film breakdown, dissolution of metal ions from pitting is not remarkable in chloride-only solution, whereas dissolution of metal ions is significantly high in thiosulfate and chloride solution. Thiosulfate has a combined effect with chloride ions in passive film degradation.

关键词： Passive film Breakdown Diffusion layer Digital holography Alloy 800

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

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

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

Electrochemical measurements used for assessment of corrosion and protection of metallic materials in the field:A critical review

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Journal of Materials Science & Technology 2022年第17期112卷 151-183页

作者： da-hai xia Cheng-Man Deng Digby Macdonald Sina Jamali Douglas Mills Jing-Li Luo Michael G.Strebl Mehdi Amiri Weixian Jin Shizhe Song Wenbin Hu Tianjin Key Laboratory of Composite and Functional Materials Tianjin 300350China School of Materials Science and Engineering Tianjin UniversityTianjin 300350China Department of Nuclear Engineering University of California at BerkeleyBerkeleyCA 94720USA School of Chemistry The University of New South WalesSydneyNSW 2052Australia School of Science and Technology University of NorthamptonSt.George’s AvenueNorthamptonNN26JDUK Department of Chemical and Materials Engineering University of AlbertaEdmontonAlberta T6G 1H9Canada Department of Materials Science(LKO WW-4)University of Erlangen-Nuremberg91058 ErlangenGermany Department of Mechanical Engineering George Mason UniversityFairfaxVirginia 22030USA Zhoushan Marine Corrosion Institute of Central Research Institute of Iron and Steel Zhoushan316003China

Corrosion degradation is detrimental to metal structures as it shortens their lifetime and leads to huge economic losses and unexpected ***,the detection and monitoring of corrosion degradation is of great ***,we briefly review the state-of-the-art electrochemical methods,instrumentation(based on virtual instrumentation),and advanced sensor/probes that are used in the field for the assessment of corrosion *** corrosion monitoring results,some of which have been obtained at Tianjin University in the past 30 years,for metallic materials and organic coating/metal systems in atmospheric,marine,and soil conditions in the field are *** methods,data analysis,and theoretical and mathematical models regarding each corrosion system are discussed,and the challenges,problems and possible solutions for each case are ***,future developments,such as wireless,intelligent,and automatic electrochemical measurement,that will augment the present electrochemical methods of evaluating corrosion degradation are summarized.

关键词： Corrosion monitoring Electrochemical method Virtual instrumentation Sensor data analysis In-situ measurement Probe

Nuclei-rich galvanizing strategy for suppressing zinc dendrite growth

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Rare Metals 2024年第8期43卷 4016-4018页

作者： hai-xia Wu Kai-Lu Guo College of Chemistry and Chemical Engineering Henan Key Laboratory of Function-Oriented Porous MaterialsLuoyang Normal UniversityLuoyang 471934China

The uncontrolled growth of zinc dendrites on zinc anode hinders the application of zinc ion *** solve this problem,Lu's group proposed a nuclei-rich galvanizing strategy for suppressing the zinc dendrite *** allows the nuclei-rich zinc electrode to cycle steadily for1200 h and have a high Coulombic efficiency of 99.7%at15 mA·cm^(-2)with a deposited amount of 10 mAh·cm^(-2).Moreover,the Zn-MnO_(2) battery with a low N/P ratio of 1.9exhibited sustained cycling life.

关键词： cycling sustained battery

Zeolite polymer membrane as protective interface for Mg battery

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Rare Metals 2024年第9期43卷 4636-4638页

作者： hai-xia Wu Kai-Lu Guo College of Chemistry and Chemical Engineering Henan Key Laboratory of Function-Oriented Porous MaterialsLuoyang Normal University

Excessive electrolyte decomposition seriously determines the performance of high-voltage Mg batteries. In Nazar?s work, the strategy using a zeolite polymer membrane as a protective interface was proposed to restrain the electrolyte decomposition. This strategy could boost Mg plating/stripping performance up to 6000 h in zeolite/Mg|zeolite/Mg symmetric cells and 91%capacity retention in zeolite/Mg||Mo3S4battery after 200 *** storage devices have been intensively explored because of their important roles in our daily lives [1D3].

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Drug repurposing for cancer therapy

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Signal Transduction and Targeted Therapy 2024年第5期9卷 1981-2013页

作者： Ying xia Ming Sun hai Huang Wei-Lin Jin Center for Clinical Laboratories The Affiliated Hospital of Guizhou Medical UniversityGuiyang 550004PR China The First Affiliated Hospital of Guizhou University of Traditional Chinese Medicine Guiyang 550001PR China School of Clinical Laboratory Science Guizhou Medical UniversityGuiyang 550004PR China Division of Gastroenterology and Hepatology Department of Medicine andDepartment of OncologySidney Kimmel Comprehensive Cancer CenterJohns Hopkins University School of MedicineBaltimoreMD 21287USA Institute of Cancer Neuroscience Medical Frontier Innovation Research CenterThe First Hospital of Lanzhou UniversityThe First Clinical Medical College of Lanzhou UniversityLanzhou 730000PR China

Cancer,a complex and multifactorial disease,presents a significant challenge to global *** significant advances in surgical,radiotherapeutic and immunological approaches,which have improved cancer treatment outcomes,drug therapy continues to serve as a key therapeutic ***,the clinical efficacy of drug therapy is often constrained by drug resistance and severe toxic side effects,and thus there remains a critical need to develop novel cancer *** promising strategy that has received widespread attention in recent years is drug repurposing:the identification of new applications for existing,clinically approved *** repurposing possesses several inherent advantages in the context of cancer treatment since repurposed drugs are typically cost-effective,proven to be safe,and can significantly expedite the drug development process due to their already established safety *** light of this,the present review offers a comprehensive overview of the various methods employed in drug repurposing,specifically focusing on the repurposing of drugs to treat *** describe the antitumor properties of candidate drugs,and discuss in detail how they target both the hallmarks of cancer in tumor cells and the surrounding tumor *** addition,we examine the innovative strategy of integrating drug repurposing with nanotechnology to enhance topical drug *** also emphasize the critical role that repurposed drugs can play when used as part of a combination therapy *** conclude,we outline the challenges associated with repurposing drugs and consider the future prospects of these repurposed drugs transitioning into clinical application.

关键词： drugs integrating spite

Impact of wetting-drying cycles and acidic conditions on the soil aggregate stability of yellow‒brown soil

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Journal of Mountain Science 2024年第6期21卷 2075-2090页

作者： xia Zhenyao NI Yuanzhen LIU Deyu WANG Di xiaO hai Key Laboratory of Geological Hazards on Three Gorges Reservoir Area Ministry of EducationYichang 443002China College of Civil Engineering&Architecture China Three Gorges UniversityYichang 443002China Engineering Research Center of Eco-environment in Three Gorges Reservoir Region Ministry of EducationChina Three Gorges UniversityYichang 443002China

Soil aggregate is the basic structural unit of soil,which is the foundation for supporting ecosystem functions,while its composition and stability is significantly affected by the external *** study was conducted to explore the effect of external environment(wetting-drying cycles and acidic conditions)on the soil aggregate distribution and stability and identify the key soil physicochemical factors that affect the soil aggregate *** yellow‒brown soil from the Three Gorges Reservoir area(TGRA)was used,and 8 wetting-drying conditions(0,1,2,3,4,5,10 and 15 cycles)were simulated under 4 acidic conditions(pH=3,4,5 and 7).The particle size distribution and soil aggregate stability were determined by wet sieving method,the contribution of environmental factors(acid condition,wetting-drying cycle and their combined action)to the soil aggregate stability was clarified and the key soil physicochemical factors that affect the soil aggregate stability under wetting-drying cycles and acidic conditions were determined by using the Pearson’s correlation analysis,Partial least squares path modeling(PLS‒PM)and multiple linear regression *** results indicate that wetting-drying cycles and acidic conditions have significant effects on the stability of soil aggregates,the soil aggregate stability gradually decreases with increasing number of wetting-drying cycles and it obviously decreases with the increase of ***,the combination of wetting-drying cycles and acidic conditions aggravate the reduction in the soil aggregate *** wetting-drying cycles,acidic conditions and their combined effect imposes significant impact on the soil aggregate stability,and the wetting-drying cycles exert the greatest *** soil aggregate stability is significantly correlated with the pH,Ca^(2+),Mg^(2+),maximum disintegration index(MDI)and soil bulk density(SBD).The PLS‒PM and multiple linear regression analysis further reveal that the soil aggre

关键词： Yellow‒brown soil Wetting-drying cycles Acidic conditions Soil aggregate stability Soil disintegration