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纳米结构黑镍薄膜的电沉积机理宋利晓1,张昭1,张鉴清1,曹楚南1(1.浙江省杭州市浙江大学化学系)摘 要:采用直流电沉积技术在改性的Watt镀镍溶液中获得了纳米晶黑镍薄膜,采用SEM和XRD对薄膜的表面形貌和相组成进行了表征,采用循环伏安法和电化学阻抗谱对黑镍薄膜的初始电沉积行为进行了研究.结果表明,黑镍薄膜表面平整光亮,具有纳米晶结构;黑镍薄膜的电沉积过程遵循3D成核/生长机制;随着阴极沉积电势(负偏压)的增大,黄铜电极表面Ni的电沉积反应由UPD沉积,异质成核/生长转化为最终的同质成核/生长,相应的电荷转移......
海泥中硫酸盐还原菌对Zn-Al-Cd牺牲阳极腐蚀的影响张杰1,刘奉令1,李伟华1,段继周1,侯保荣1(1.山东省青岛市科学院海洋研究所)摘 要:采用EIS,PC,SEM和EDS等方法,通过在硫酸盐还原菌(SRB)的一个生长周期内测试Zn-Al-Cd牺牲阳极在不含和含SRB海泥中的腐蚀行为,以对比研究海泥中SRB对其腐蚀行为的影响.EIS和PC测试结果显示,实验初期,试样在2种海泥中的腐蚀速率都快速增大,但由于SRB的大量增长,其对试样的腐蚀作用不断增强,所以在含SRB海泥中的腐蚀速率一直大于在不含SRB海泥的腐......
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measurement, electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM). The results show that the cathodic diffusion current density presents the variation trend of initial increase... that of 104 μm, whereas the corrosion rate after long time corrosion can be ranked as 104 μm﹥402 μm﹥198 μm﹥301 μm﹥bulk solution.Key words:907 steel; atmospheric corrosion; electrochemical impedance......
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,拟合数据和实验结果一致. 关键词:含钪 Al-Cu-Li-Zr 合金；剥落腐蚀；电化学阻抗谱；时效 中图分类号:TG146.2 文献标志码:A Exfoliation corrosion and electrochemical impedance spectroscopy of Al-Cu-Li alloy containing Sc... and electrochemical impedance spectroscopy (EIS). The results show that the exfoliation susceptibility of the alloys in EXCO solution from high to low is as follows: over-aged alloy, peak-aged alloy......
technique while corrosion behavior was evaluated using linear/cyclic potentiodynamic, electrochemical impedance spectroscopy and ASTM–G67 tests. The composite contains sub-micron TiB2 particles.... For Electrochemical impedance spectroscopy (EIS) tests, both samples were diamond polished (3-4 μm) and the spectrum was obtained using a potentiostat coupled to a frequency response analyzer. The amplitude of the AC......
: aluminium; sacrificial anode; electrochemical performance; electrochemical impedance spectroscopy; segregation 1 Introduction Aluminium is a suitable metal as the sacrificial anodic material for cathode... impedance spectroscopy (EIS) was recorded in the frequency range from 10 kHz to 0.1 Hz with a perturbation amplitude of 5 mV after immersing the specimens in 3.5% NaCl solution for 4 000 s......
aging time. Key words: aluminum alloy; heat treatment; precipitation behavior; Al3(Sc, Zr) particles; electrochemical impedance spectroscopy 1 Introduction As a typical age-hardenable alloy, Al-Zn-Mg... were measured under optical microscopy. Electrochemical measurement was carried out with a three-electrode system. Electrochemical impedance spectroscopy (EIS) tests were carried out at the open circuit......
J. Cent. South Univ. Technol. (2009) 16: 0558-0562 DOI: 10.1007/s11771-009-0093-4 Alkaline treatment kinetics of calcium phosphate by piezoelectric quartz crystal impedance ZENG Li-ping(曾丽萍)1...; Abstract: Calcium phosphate film was prepared by electrochemical deposition technology. Subsequently, the alkaline treatment process of calcium......
