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Igarashi, Takahiro; Komatsu, Atsushi; Yamamoto, Yudai*; Fushimi, Koji*; Ueno, Fumiyoshi
no journal, ,
Development and simulation of hydrogen permeation considering solid/solution reaction was conducted. For solid/solution reaction we have considered elementary process of hydrogen evolution reaction, Volmer reaction, Heyrovsky reaction, Tafel reaction and permeation reaction. In the study, we will present results of hydrogen permeation calculation using developed model, and difference of behavior depending on electrode potential and width of specimen.
Igarashi, Takahiro; Komatsu, Atsushi; Yamamoto, Yudai*; Fushimi, Koji*; Ueno, Fumiyoshi
no journal, ,
In order to understand the hydrogen permeation behavior into the steel with solution flow, we developed a simulation model of hydrogen permeation reaction considering solution flow and conducted simulation analyses. We will discuss the effect of frequently controlled (like sine-curve) solution flow velocity on phase difference between cathode current density and permeation current density.
Igarashi, Yudai*; Udaanjargal, U.*; Kokubu, Yoko; Watanabe, Takahiro; Hasegawa, Hitoshi*; Niiden, I.*; Katsuta, Nagayoshi*; Davaadorj, D.*; Hasebe, Noriko*
no journal, ,
Lake Olgoy locates in the "Valley of the Gobi lakes" in southern Mongolia, on the southern slope of Khangai Mountain range. The 10.5 m core was collected from Lake Olgoy in the winter of 2017. This study measured quartz OSL, feldspar IRSL and radiocarbon ages. Quartz OSL ages range in 0.6
0.1 ka to 10.72.5 ka, feldspar IRSL in 1.10.1 ka to 52.95.0 ka and radiocarbon ages in 1.4 ka to 48.6 ka. Based on the comparison of ages by three methods, the age-depth model of the core was proposed. Together with other analytical data from the core, glacier melting events in Khangai Mountains will be discussed.
Igarashi, Yudai*; Udaanjargal, U.*; Kokubu, Yoko; Fujita, Natsuko; Hasegawa, Hitoshi*; Niiden, I.*; Katsuta, Nagayoshi*; Davaadorj, D.*; Hasebe, Noriko*
no journal, ,
Lake Olgoy locates in the "Valley of the Gobi lakes" in southern Mongolia, on the southern slope of Khangai Mountain range. The 10.5m core was collected from Lake Olgoy in the winter of 2017. This study measured quartz OSL, feldspar IRSL and radiocarbon ages. Quartz OSL ages range in 0.60.1 ka to 10.72.5 ka, feldspar IRSL in 1.10.1 ka to 52.95.0 ka and radiocarbon ages in 1.4 ka to 48.6 ka. Based on the comparison of ages by three methods, the age-depth model of the core was proposed. Together with other analytical data from the core, glacier melting events in Khangai Mountains will be discussed.