Online ISSN : 2186-2451
Print ISSN : 1344-3542
ISSN-L : 1344-3542
Volume 83 , Issue 7
Showing 1-14 articles out of 14 articles from the selected issue
  • Hiroki SHIBATA, Hirokazu HAYASHI, Tadafumi KOYAMA
    2015 Volume 83 Issue 7 Pages 532-536
    Published: July 05, 2015
    Released: July 05, 2015
    Electrochemical properties of curium (Cm-244) dissolved in LiCl-KCl eutectic melt were studied in the temperature range of 718–823 K. A small electrochemical cell used in the present study was designed to measure electrochemical properties of highly radioactive Cm-244, the maximum handling amount of which is 30 mg in our hot cells, dissolved in molten salts. Apparent standard potentials of Cm3+/Cm couple obtained in the present study, E°* (Cm3+/Cm) = (−3.236 ± 0.011) + (4.86 ± 0.14) × 10−4 T, reasonably agree with Osipenko’s data (2011) and are lower than Martinot’s data (1975). The validity of the data obtained in the present study was discussed by comparing with the reported data of other transuranic elements.
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  • Jinglun WANG, Xinyue ZHAO, Hao LUO, Jianwen YANG, Yoshioka MAKOTO, Lin ...
    2015 Volume 83 Issue 7 Pages 537-540
    Published: July 05, 2015
    Released: July 05, 2015
    An aminoalkyldisiloxane compound, (2-(N,N-dimethylamino)ethoxy)propyl pentamethyldisiloxane (DSC3N1), was investigated as a film-forming electrolyte additive for graphite anode. The graphite/Li cells with 1 vol% DSC3N1 addition exhibited superior electrochemical performances compared with those in the base electrolyte (1 M LiPF6 in EC/DEC; v/v = 1/1). The film-forming capability of DSC3N1 on the surface of graphite was investigated by scanning electron microscope, energy dispersive spectroscope, and FT-IR analysis. A comparative hydrolysis experiment of the electrolyte with/without DSC3N1 additive using 19F-NMR technique demonstrates that DSC3N1 exhibited acid scavenging property and inhibited the hydrolysis of LiPF6.
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  • Yu XIUMING, Huang YANLIANG, Amar Prasad YADAV, Qu WENJUAN, Roland DE M ...
    2015 Volume 83 Issue 7 Pages 541-548
    Published: July 05, 2015
    Released: July 05, 2015
    The corrosive condition at marine splash zone is detrimental to steel structures of offshore applications. The corrosion at splash zone is the most serious not only for uniformed corrosion but also localized corrosion. Practically, marine structures experience cyclic seasonal temperature change. Temperature acts as an important factor affecting corrosion process. In this paper, the effects of temperature on pitting behavior of a low alloy high strength steel (AISI 4135) in marine splash zone have been investigated using electrochemical techniques and morphology observations. The area of hysteresis loop was greater under seawater film at lower temperatures than that at high temperatures, indicating that the pitting corrosion sensitivity is high at lower temperature. AISI 4135 steel has the potential danger of pitting corrosion in marine splash zone after long exposure.
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  • Yoshinobu OSHIKIRI, Ryoichi AOGAKI, Makoto MIURA, Atsushi SUGIYAMA, Ry ...
    2015 Volume 83 Issue 7 Pages 549-553
    Published: July 05, 2015
    Released: July 05, 2015
    Ionic vacancies created in copper anodic dissolution has been firstly observed by the conversion to microbubbles using both of cyclotron effect and pinch effect under a vertical magnetic field; in a circulating solution induced by Lorentz force, ionic vacancies collide with each other, changing to nanobubbles. Then, the circulation of the nanobubbles with solution makes further collisions, yielding microbubbles. Based on this result, the lifetimes of ionic vacancy formed in copper electrodeposition were finally determined.
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