A new thermal desorption spectroscopy (TDS) apparatus was used to identify the hydrogen trapping peaks, and to measure the hydrogen concentrations in 3.5NiCrMoV steel after hydrogen charging electrochemically, and in gaseous hydrogen. The hydrogen concentration increased with (i) increasingly negative charging potential and (ii) increasing hydrogen gas pressure. The equivalent hydrogen fugacity versus charging overpotential was derived. There was a difference in the diffusible hydrogen traps activated during electrochemical and gas phase charging, attributed to the difference in the hydrogen fugacity. A two-site model for Sieverts' Law explained the positive Y-intercept, as the density of already filled hydrogen traps.

中文翻译：

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3.5NiCrMoV钢电化学充电时等效氢逸度的测定

使用一种新的热解吸光谱 (TDS) 装置来识别氢俘获峰，并测量 3.5NiCrMoV 钢电化学充氢后和气态氢中的氢浓度。氢浓度随着 (i) 负充电电位的增加和 (ii) 氢气压力的增加而增加。推导出等效氢逸度与充电过电位的关系。由于氢逸度的不同，在电化学和气相充电过程中激活的扩散氢陷阱存在差异。Sieverts 定律的双位点模型将正 Y 截距解释为已填充的氢陷阱的密度。