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pH value in simulated occluded corrosion cell for magnesium alloys ZENG Rong-chang(曾荣昌)1, CHEN Jun(陈君)1, KE Wei(柯伟)2, Han En-hou(韩恩厚)2, W. Dietzel3 1. School of Materials Science and Engineering... to solid ratio (L/S ratio), initial pH value and chemical compositions of solutions on pH value in OCC was discussed. The experimental results show that pH value for magnesium alloys increases gradually......
words: magnesium alloy; corrosion; sodium sulphate; pH value 1 Introduction Magnesium alloys have received extensive recognition as a new type of environmentally friendly material because... solution is necessary. In this work, the effects of pH value and SO42- ions on the corrosion behaviour of die-cast AZ91D were systematically studied. 2 Experimental 2.1 Materials The specimens were......
Influence of pH value on chromate-free conversion coating for magnesium alloys WENG Wen-ping(翁文凭), CHEN Qi(陈 琦), ZHANG Hui(张 慧), ZHONG Hao(钟 皓), YAN Yun-qi(闫蕴琪) Suzhou Institute for Nonferrous..., alloy the most important one in producing high quality conversion coatings is found to be the control of the pH value. The influence of pH value on the conversion coating including color, thickness......
,0.1C倍率下首次放电比容量为192.4 mA·h/g；经过40次循环,容量保持率为91.56%. 关键词:锂离子电池；正极材料；LiNi0.8Co0.1Mn0.1O2；共沉淀法；pH值 中图分类号:TM912.9；O646 文献标志码:A Effect of pH value on performance... LiNi0.8Co0.1Mn0.1O2 was prepared by heat-treatment of Ni0.8Co0.1Mn0.1(OH)2 precursors and LiOH·H2O. The effect of pH value on the structure and electrochemical properties of samples was studied. The prepared samples......
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the extracellular polysaccharide secreted by free cells in the solution at bacterial adaptive phase, logarithmic phase and stationary phase whenever pH value is at 1.0, 1.5, 2.0 or 2.5; free cells... an important role in oxidation-reduction reactions in the bioleaching system. Key words: extracellular protein; Acidithiobacillus ferrooxidans; chalcopyrite; bioleaching; pH value 1 Introduction......
poly-acrylate (NH4PAA) content, pH value, volume fraction of solid phase, ball milling time and ionic strength significantly influence the dispersion and stability behavior of Al2O3 suspension. The viscosity and sedimentation height achieve the minimum value at dispersant content of 0.8% (mass fraction), pH value of 9.5, volume fraction of solid phase of 50%, ball milling time of 24 h......
Trans. Nonferrous Met. Soc. China 23(2013) 1395-1402 Influence of pH value and chelating reagent on performance of Li3V2(PO4)3/C cathode material Wei XIANG1, Yan TANG1, Yan-ying WANG1, Ben-he ZHONG1..., salicylic acid and polyacrylic acid) at pH value of 3 or 7. The crystal structure, morphology, specific surface area and electrochemical performance of the prepared samples were investigated by X-ray......
was carried out. The relationships of each substance in solution with pH value, ammonia and oxide acid were revealed. The results show that, Fe in solution exists as [Fe(C2O4)n]2-2n mainly in contrast... acidic and alkaline conditions, respectively. The precipitation rate of Ni is higher than that of Fe at low pH value, and lower than that of Fe at high pH value. Key words: Fe-Ni alloy; solution......
球形Ni(OH)2制备中pH在线检测及控制系统的设计和应用李涛1,陈飞彪1,郭荣贵1,傅钟臻1,于丽敏1,夏雯1,蒋文全1(1.北京市北京有色金属研究总院)摘 要:在球形Ni(OH)2制备过程中高盐度,高碱度,高温和强对流的环境因素导致pH电极稳定性降低,寿命缩短,pH参数检测和控制困难,为此采用反应釜外检测相对pH值的方法,设计pH在线检测装置和基于组态软件和可编程控制器的pH值在线控制系统,实现了pH值在0.02~0.05的微小波动范围测量,现场控制效果良好.关键词:无机非金属材料； 球形Ni(OH)2； pH在线控制； 组态软件； 可编程控制器......
