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cathodic reaction mechanisms in CO2 corrosion of low-Cr steels

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International Journal of Minerals,Metallurgy and Materials 2019年第11期26卷 1405-1414页

作者： Jin-yang Zhu Li-ning Xu Min-xu Lu Wei Chang National Center for Materials Service Safety University of Science and Technology BeijingBeijing 100083China Corrosion and Protection Center Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China CNOOC Research Institute Beijing 100027China

The cathodic reaction mechanisms in CO2 corrosion of low-Cr steels were investigated by potentiodynamic polarization and galvanostatic *** but different dominant cathodic reactions were observed at different p H *** the higher p H level(p H>~5),H2 CO3 reduction was the dominant cathodic *** reaction was under activation *** the lower pH level(pHcathodic reaction to *** measured electrochemical impedance spectrum corresponded to the proposed cathodic reaction mechanisms.

关键词： low alloy steel carbon dioxide corrosion EIS cathodic reaction mechanisms

Assistant Anode in a cathodic Arc Plasma Source

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Chinese Physics Letters 2001年第8期18卷 1103-1104页

作者：张涛张荟星 Ian G.Brown Paul K.Chu Beijing Radiation Center Institute of Low Energy Nuclear PhysicsBeijing Normal UniversityBeijing 100875 Department of Physics and Materials Science City University of Hong Kong83 Tat Chee AvenueKowloonHong Kong Lawrence Berkeley National Laboratory University of CaliforniaBerkeleyCA 94720U.S.A.

The performance and characteristics of a cathodic arc plasma source,consisting of a titanium cathode,an anode with and without a tungsten mesh,and a coil producing a focusing magnetic field between the anode and cathode,are *** high transparency and large area of the mesh allow a high plasma flux to penetrate the anode from the cathodic *** mesh helps to decrease the arc resistance and the ignition voltage of the cathodic arc in the focusing magnetic field,and increase the life of the *** means that the source makes the cathodic arc easily and greatly stabilized during the operation when a focusing magnetic field exists in the source.

关键词： cathodic resistance titanium

Synergetic effect of graphene and Co(OH)2 as cocatalysts of TiO2 nanotubes for enhanced photogenerated cathodic protection

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Journal of Materials Science & Technology 2020年第2期37卷 55-63页

作者： Xiayu Lu Li Liu Xuan Xie Yu Cui Emeka E.Oguzie Fuhui Wang Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang110016China Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Materials Science and EngineeringNortheastern UniversityShenyang110819China Electrochemistry and Materials Science Research Laboratory Department of ChemistryFederal University of TechnologyP.M.B.1526OwerriNigeria

A layer of graphene(GR)particles was successfully deposited at the interface between Co(OH)2 nanoparticles and TiO2 nanotubes,aiming to improve the photoelectrochemical performance of the large-bandgap semiconductor *** obtained Co(OH)2/GR/TiO2 was extensively characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM),X-ray photoelectron spectroscopy(XPS),UV–vis absorption spectra and photoluminescence(PL)emission *** impedance spectra,photogenerated potential-time(E-t),photocurrent density-time(i-t)and i-E curves and open circuit potential(OCP)curves were measured to investigate the photoelectrochemical activities and photogenerated cathodic protection *** results revealed that Co(OH)2/GR/TiO2 exhibits excellent photoelectrochemical and photogenerated cathodic performance due to synergistic effect between Co(OH)2 and ***(OH)2 and graphene co-modified TiO2 photoanode could provide an effective protection for 304 stainless steel(304 SS)in 3.5 wt%Na Cl solution for 12 h,which would be promising for future practical applications in the field of marine corrosion protection.

关键词： TiO2 nanotubes Graphene Co(OH)2 nanoparticles Photoelectrochemical performance Photogenerated cathodic protection

cathodic REDUCTION OF METAL-CHLORIDE COORDINATION IONS

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中国有色金属学会会刊：英文版 1994年第1期4卷 39-44页

作者： Zen, Zhenou(Department of Applied Chemistry Chemistry,South China University of Technology, Guangzhou510641, China)Yang, Songqing(Department of Chemistry, Central South University of Technology, Changsha 410083, China)

ＣＡＴＨＯＤＩＣＲＥＤＵＣＴＩＯＮＯＦＭＥＴＡＬ－ＣＨＬＯＲＩＤＥＣＯＯＲＤＩＮＡＴＩＯＮＩＯＮＳＺｅｎ，Ｚｈｅｎｏｕ（ＤｅｐａｒｔｍｅｎｔｏｆＡｐｐｌｉｅｄＣｈｅｍｉｓｔｒｙＣｈｅｍｉｓｔｒｙ，ＳｏｕｔｈＣｈｉｎａ... 详细信息

ＣＡＴＨＯＤＩＣＲＥＤＵＣＴＩＯＮＯＦＭＥＴＡＬ－ＣＨＬＯＲＩＤＥＣＯＯＲＤＩＮＡＴＩＯＮＩＯＮＳＺｅｎ，Ｚｈｅｎｏｕ（ＤｅｐａｒｔｍｅｎｔｏｆＡｐｐｌｉｅｄＣｈｅｍｉｓｔｒｙＣｈｅｍｉｓｔｒｙ，ＳｏｕｔｈＣｈｉｎａＵｎｉｖｅｒｓｉｔｙｏｆＴｅｃｈｎ...

关键词： cathodic reduction metal chloride coordination ions copper chloride zinc chlo-ride lead chloride chronopotential method

Influence of arsenic,antimony and cobalt impurities on the cathodic process in zinc electrowinning

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Science China Chemistry 2010年第3期53卷 676-681页

作者： Yu, Xiao Hua Xie, Gang Li, Rong Xing Li, Yong Gang Lu, Ying Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming 650093 China Technology Center Yunnan Metallurgy Group Co. Kunming 650031 China

By means of an electrochemical study,the influence of arsenic,antimony and cobalt on cathodic polarization in the zinc electrowinning process,the associated kinetic equations and parameters,and the polarization mechanism have been *** results show that the experimental values of the kinetic parameters are in accord with the theoretical values in the ZnSO4/H2SO4 solution with a single impurity is *** contrast,the charge transfer coefficient α is smaller than the theoretical value in the ZnSO4/H2SO4 solution when the three impurities are added together.

关键词： zinc electrowinning arsenic antimony and cobalt cathodic polarization curves kinetic equation and parameters

An MFC capable of regenerating the cathodic electron acceptor under sunlight

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中国科学：技术科学英文版 2010年第9期53卷 2489-2494页

作者： FU Qian,LI Jun,ZHU Xun,LIAO Qiang,YE DingDing & ZHANG Liang Institute of Engineering Thermophysics,Chongqing University,Chongqing 400030,China Institute of Engineering Thermophysics Chongqing University Chongqing China

A renewable MFC (microbial fuel cell) cathode was used in this study because the iodide ion could react with oxygen to generate triiodide under natural *** feasibility of the regeneration of triiodide ion under natural sunlight and the effect of the regenerated triiodide ion concentration on the MFC performance were *** results showed that the power density of the MFC using triiodide ion as cathodic electron acceptor was significantly higher than that of using ferricyanate,and that the iodide ion can be oxidized to triiodide ion by oxygen in air at the expense of natural *** addition,it was obvious from the experimental results that the MFC performance was improved with the increase of the triiodide concentration,indicating that the concentration of triiodide ion had a critical effect on the MFC *** linear sweep voltammetry (LSV) curves for the electro-reduction of triiodide ion on the carbon paper were obtained and the results suggested that the diffusion process of triiodide ions to cathode was the control factor for the MFC performance.

关键词： microbial fuel cell cathodic electron acceptor triiodide ion

Synergy of Anodic Oxidation and cathodic Reduction Leads to Electrochemical C—H Halogenation

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Chinese Journal of Chemistry 2019年第6期37卷 611-615页

作者： Zhilin Zhou Yong Yuan Yangmin Cao Jin Qiao Anjin Yao Jing Zhao Wanqing Zuo Wenjie Chen Aiwen Lei National Research Center for Carbohydrate Synthesis Jiangxi Normal UniversityNanchangJiangxi 330022China College of Chemistry and Molecular Sciences Institute for Advanced Studies (IAS)Wuhan UniversityWuhanHubei 430072China

We herein uncovered an electrochemical C—H halogenation protocol that synergistically combines anodic oxidation and cathodic reduction for C—X bond formation. The reaction was demonstrated under exogenous-oxidant-free conditions. Moreover, this is the first example of activating CBr4, CHBr3, and CCl3Br under electrochemical conditions.

关键词： anodic oxidation cathodic reduction electrochemistry C-H halogenation synthetic methods

The cathodic Corrosion of TiAl and Effect of Hydrogen

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Science China Mathematics 1994年第9期37卷 1144-1152页

作者：褚武杨高克玮乔利杰肖纪美 Department of Materials Physics University of Science and Technology Beijing Beijing 100083 PRC

TiAl can undergo severe corrosion, called cathodic corrosion, when cathodically charged with hydrogen in aqueous solutions or molten salt at 160℃. The mechanism of this phenomenon is experimentally discussed, and the... 详细信息

关键词： cathodic corrosion hydrogen TiAl.

NUMERICAL MODELLING FOR OFFSHORE PLATFORM cathodic PROTECTION-LOCAL SYSTEM

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Chinese Journal of Oceanology and Limnology 1995年第3期13卷 247-252页

作者：曹圣山王庆璋张曼平 Ocean University of Qingdao Qingdao

This paper discusses numerical methods for modelling cathodic protation (CP) using Boundary ElementMethods(BEM) for CP design analysis in comparision with the traditional methods and presentsseveral mathematical model... 详细信息

关键词： offshore cathodic protection numerical model