3503 昇温脱離法によるSUS304ステンレス鋼の水素分析(S20-2 水素チャージ材の強度特性,S20 材料強度特性に及ぼす水素の影響)

概要

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We have investigated the entry of hydrogen into SUS304 stainless steel by cathodic polarization. The specimens of stainless steel sheets of 0.1mm thick were annealed at 800℃ in vacuum, and cathodically polarized at 100A/m^2 in 0.5kmol/m^3 H_2SO_4 solution containing of 5g/m^3 As_2O_3 at 25℃. Immediately after interruption of cathodic current, hydrogen analysis was done by the thermal desorption spectroscopy method. In the thermal spectrum of hydrogen evolution, two hydrogen evolution peaks (peak(1) and peak(2)) were observed near 40℃ and 250℃, irrespective of cathodic polarization time. These peaks became large with increase in cathodic polarization time, while change of a shape was not observed. Cathodic polarization time dependence of peak temperature and peak height of the hydrogen evolution peaks was investigated. The peak temperatures of peak(1) and peak(2) were almost constant, irrespective of cathodic polarization time, while the peak heights of them became large with increase in cathodic polarization time. These experimental results indicate that hydrogen is introduced into SUS304 stainless steel by cathodic polarization, and that there are two kinds of the potential energy of dissolved hydrogen.
一般社団法人日本機械学会の論文
2006-09-15