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pH值和cl浓度对高强Cu-Ni-Al合金耐腐蚀性能的影响

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材料开发与应用 2024年

作者：常延丽张高序车超杰西安工程大学材料工程学院

为了探究Cu-Ni-Al合金在工程中不同服役条件下的耐腐蚀性能，通过X射线衍射仪、扫描电子显微镜、静态全浸腐蚀实验和电化学测试，探究了不同pH值和cl-浓度对Cu-Ni-Al合金的耐腐蚀性能的影响。结果表明，在pH=3时，合金材料表面难以生成... 详细信息

为了探究Cu-Ni-Al合金在工程中不同服役条件下的耐腐蚀性能，通过X射线衍射仪、扫描电子显微镜、静态全浸腐蚀实验和电化学测试，探究了不同pH值和cl-浓度对Cu-Ni-Al合金的耐腐蚀性能的影响。结果表明，在pH=3时，合金材料表面难以生成腐蚀产物膜；且在pH=12时，合金材料表面难以附着生成Cu2（OH）3cl；而在pH=6～10时，合金材料表面则可以形成表面疏松(Cu2（OH）3cl)，内层致密(Cu2O)，对内部金属材料具有保护作用的双层腐蚀产物膜结构。且因腐蚀过程中电化学阴极反应不同，酸性条件下促进阴极反应的进行，而碱性条件下会抑制阴极反应的进行。所以，随着腐蚀介质pH值升高，Cu-Ni-Al合金材料越容易在腐蚀介质中发生钝化，合金材料的平均腐蚀速率也会逐渐降低。随着Nacl腐蚀介质中cl-浓度增大，会抑制Cu-Ni-Al合金材料表面Cu2O腐蚀产物膜的形成，阻碍合金表面致密腐蚀产物膜的生成，削弱Cu2O膜对内部合金材料的保护能力，使平均腐蚀速率也随之加快，合金材料的耐腐蚀性降低。

关键词： Cu-Ni-Al合金 pH值 cl 浓度耐腐蚀性能

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和而不同,春风450cl-C单座版

摩托车 2024年第8期 56-69页

作者：张华李文韬(图) 不详

巡航车热潮持续蔓延,很多新手都选择巡航车作为自己的第一辆车,但国产小排量巡航车中,靠谱的就那么几款,外观还大体相同,如何在有限的风格中寻找更多的个性和差异,成为和众多车友追求的目标,很多有着独特风格的小排量巡航车也应运而生,... 详细信息

巡航车热潮持续蔓延,很多新手都选择巡航车作为自己的第一辆车,但国产小排量巡航车中,靠谱的就那么几款,外观还大体相同,如何在有限的风格中寻找更多的个性和差异,成为和众多车友追求的目标,很多有着独特风格的小排量巡航车也应运而生,春风的cl-C系列就是其中之一。

关键词：小排量 cl 车友和而不同巡航车独特风格春风

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Effects of different alloying elements M(M=Fe,Ni,Mn,Si,Mo,Cu,Y)on Cr_(2)0_(3)with cl:a first-principles study

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Journal of Iron and Steel Research International 2021年第5期28卷 613-620页

作者： Ya-nan Niu Nan Dong Si Liu Jing Yang Pei-de Han Yu-cheng Wu College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024ShanxiChina Shanxi Engineering Technology Research Center for Energy Materials and Analysis and Testing Taiyuan University of TechnologyTaiyuan 030024ShanxiChina

Using the first-principles methods,the effects of different alloying elements M(M=Fe,Ni,Mn,Si,Mo,Cu,Y)on Cr_(2)0_(3)with cl adsorption are *** results show that the layer distance of all doped models has been widened to different degrees with cl *** Mo or Y is doped into the passive film,the difference of layer distance is reduced to a certain *** interaction between alloying elements and cl is studied by calculating the adsorption height,bond population and electron density *** results show that Mo and Y can inhibit cl erosion and improve the corrosion resistance of passive ***,we investigate the CrMoFe and CrMoY co-doped system with cl *** calculations point out that when Mo and Y are doped together in the passive film,the corrosion resistance of the system is more prominent than that of CrMo,CrY and CrMoFe co-doping systems.

关键词： Density functional theory Cr_(2)0_(3) Doping cl Austenitic stainless steel

Evidence for Multiple Underlying Fermi Surface and Isotropic Energy Gap in the Cuprate Parent Compound Ca2CuO2cl2

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Chinese Physics Letters 2018年第6期35卷 84-89页

作者： Cheng Hu Jian-Fa Zhao Ying Ding Jing Liu Qiang Gao Lin Zhao Guo-Oong Liu Li Yu Chang-Qing Jin Chuang-Tian Chen Zu-Yan Xu Xing-Jiang Zhou Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190 University of Chinese Academy of Sciences Beijing 100049 Technical Institute of Physics and Chemistry Chinese Academy of SciencesBeijing 10019 Collaborative Innovation Center of Quantum Matter Beijing 100871

The parent compounds of the high-temperature cuprate superconductors are Mott *** has been generally agreed that understanding the physics of the doped Mott insulators is essential to understanding the mechanism of high temperature superconductivity.A natural starting point is to elucidate the basic electronic structure of the parent *** we report comprehensive high resolution angle-resolved photoemission measurements on Ca_2CuO_2cl_2,a Mott insulator and a prototypical parent compound of the *** *** Fermi surface sheets are revealed for the first *** high energy waterfall-like band dispersions exhibit different behaviors near the nodal and antinodal *** distinct energy scales are identified：a d-wave-like low energy peak dispersion and a nearly isotropic lower Hubbard band *** observations provide new information of the electronic structure of the cuprate parent compound,which is important for understanding the anomalous physical properties and superconductivity mechanism of the high temperature cuprate superconductors.

关键词： CuO Evidence for Multiple Underlying Fermi Surface and Isotropic Energy Gap in the Cuprate Parent Compound Ca2CuO2cl2 Ca cl

Response surface optimization of process parameters for removal of F and cl from zinc oxide fume by microwave roasting

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Transactions of Nonferrous Metals Society of China 2015年第3期25卷 973-980页

作者：李志强李静张利波彭金辉王仕兴马爱元王宝宝昆明理工大学云南省特种冶金重点实验室昆明650093 昆明理工大学微波能工程应用及装备技术国家地方联合工程实验室昆明650093 昆明理工大学非常规冶金教育部重点实验室昆明650093 昆明理工大学超硬材料先进制备技术国际联合研究中心昆明650093 昆明理工大学冶金与能源工程学院昆明650093

Microwave was applied to roasting the zinc oxide fume obtained from fuming furnace for the removal of F and cl. The effects of important parameters, such as roasting temperature, holding time and stirring speed, were investigated and the process conditions were optimized using response surface methodology (RSM). The results show that the effects of roasting temperature and holding time on the removal rate of F and cl are the most significant, and the effect of stirring speed is the second. The defluorination rate reaches 92.6% while the dechlorination rate reaches 90.2%, under the process conditions of roasting temperature of 700 °C, holding time of 80 min and stirring speed of 120 r/min. The results indicate that the removal of F and cl from fuming furnace production of zinc oxide fumes using microwave roasting process is feasible and reliable.

关键词： zinc oxide fume F cl removal rate microwave roasting response surface methodology

Study of Photostimulable Luminescence Materials Sr_9Ca(PO_4)_6cl_2:Eu

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Rare Metals 1989年第4期9卷 49-53页

作者： Song Qingfang China Criminal Police Institute,Shenyang 110035Wang Yanji Zhao Wei Su Mianzeng Department of Chemistry,Peking University,Beijing 100871 China Criminal Police Institute 辽宁沈阳北京大学北京

The polycrystalline Sr_9Ca(PO_4)_6cl_2:Eu has been synthesized by solid state *** reaction condition,the appropriate raw materials and their quantity used,which may affect the photostimulable luminescence (PSL),have been systematically inves- *** properties of this PSL phosphor as a material for storing and reproducing the X-ray image in computer-aided radiography have been reported briefly.

关键词： Eu PO4 Study of Photostimulable Luminescence Materials Sr9Ca Sr cl

Effect of cl^-ion on Anodic Iron Dissolution in H_2S-Containing Sulfuric Acid Solutions

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Chinese Chemical Letters 1998年第10期9卷 945-948页

作者： Li Jing YAN Lin NIU Hat Chao LIN Wei Tao WU Shang Zhang LIU(Institute of Corrosion and Protection of Metals, State Key Laboratory for Corrosion and Protection, Chinese Academy of Sciences, Shenyang 110015Department of Chemistry, Liaoning University, S Inst. Corros. and Protect. of Met. State Key Lab. Corros. and Protect. Chinese Academy of Sciences Shenyang 110015 China Department of Chemistry Liaoning University Shenyang 110036 China

The effect of cl- ion on the anodic iron dissolution in H2SO4 solutions containing H2S has been studied by using electrochemical polarization curve measurements. The competitive adsorption for cl- and HS- ions at an anodic potential has been calculated using the CNDO/2method. The results show that a ceftain concentration of the cl- ion can be adsorbed steadily and inhibit the anodic reaction of iron catalyzed by HS-. However, when the cl- ion reaches the saturation adsorption, it begins to promote the anodic reaction of iron due tO the increased negative charge of iron atoms.

关键词： iron anodic dissolution cl H_2S, CNDO/2

RESEARCH ON TRINUclEAR MOLYBDENUM clUSTER COMPOUNDS——CRYSTAL AND MOLECULAR STRUCTURE OF （Et4N）2[Mo3（μ3-O）（μ3-cl）（μ2-cl）3cl6]·EtOH

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Science in China,Ser.B 1985年第2期28卷 561-568页

作者：商茂虞黄金陵卢嘉锡 Fujian Institute of Research on the Structure of Matter Academia Sinica Fuzhou

The title crystal belongs to the monoclinic system. The space group is P21/c with unit cell parameters: a=11.379（3）, b=20.766（2）, c=14.487（3）, β=91.49（2）°, V=3519（2）3Z=4, Dc=***-3, D0=***-3. The crystal structure was solved by the heavy atom method and difference Fourier synthesis and refined by the full-matrix least-squares to a final R factor of 0.040 based on 3261 unique reflections with intensities I≥3σ（I）. The structure consists of two sots of tetraethylammonium cations and trinuclear Me cluster anions. In the cluster anion the three Mo atoms form an isosceles triangle with Mo-Mo distances of 2.601（1）, 2.608（1）, 2.642（1）, respectively, showing a strong bonding interaction between the metal atoms. One μ3-O atom and one μ3-cl atom are situated above and below the triangle respectively, binding the three Me atoms to form a triangular bipyramidal cluster core. Each pair of Mo atoms is bridged further by a μ2-cl atom situated on the Mo3 triangular plane. In addition, each

关键词： Mo3 RESEARCH ON TRINUclEAR MOLYBDENUM clUSTER COMPOUNDS Et4N CRYSTAL AND MOLECULAR STRUCTURE OF EtOH cl

The CO_2 laser-induced radical-chain reactions between CH_3CF_2H and chlorine-atom donors CF_2clCFcl_2, CF_3Ccl_3 CFcl_3 or CF_2cl_2

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Chinese Journal of Chemistry 1992年第3期10卷 245-252页

作者： LI, Fang-Lin SHI, Ji-Liang BI, Qi-Xiu GU, Jia-Liang JIANG, Xi-Kui Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032 Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032

The CO_2 laser induced room temperature reactions of CH_3CF_2H or another protium-donor CH_3CHclCH_3 with chlorine-atom donors (Z--cl) CFcl_2CF_2cl, CF_3Ccl_3, CFcl_3 or CF_2cl_2, have been investigated. Some of these reactions can yield two important monomers (CF_2=CH_2 and CF_2=CFcl) for fluoropolymers simultaneously. The yield dependence of these two alkenes on experi- mental conditions has been studied. A laser-initiated chain process is supported by identifica- tion of Z--H intermediates in these reactions.

关键词： CI CF The CO2 laser-induced radical-chain reactions between CH3CF2H and chlorine-atom donors CF2clCFcl2 CF3Ccl3 CFcl3 or CF2cl2 CO CH cl