RESEARCH OF DETECTOR FOR HYDROGEN THROUGH STEEL BY USING ION-CONDUCTED CERAMICS

在以炼油厂为代表的化工厂，高压氢气在高温下被处理，氢气溶解到钢中，与碳或碳化物反应形成甲烷泡，有时会导致钢的损坏。因此，研制能够提前发现此类危险的高温型氢气探测器是十分重要的。通过两年的研究，得出以下结论：(1)SrCeO_3陶瓷最适合在高压-高温氢气环境中作为氢探测器的固体电解液。(2)研制了测量氢渗透电流的电子电路，实现了低电子噪声测量。(3)利用研制的探测器进行了长达数月的长期测量，得到了可重复的氢渗透系数和扩散系数。(4)在进一步的研究阶段，将所研制的探测器应用于实际植物等方面是很重要的。

At the chemical plants typified by oil refineries in which high pressure hydrogen gas is treated at high temperature, the hydrogen dissolves into a steel, reacts with carbon or carbide to form the methane bubble and sometimes results in the damage of steel. Therefore, it is very important to develop the high temperature type hydrogen detector which catches such riskness in advance. Through two years'project, the following results were obtained :(1) The SrCeO_3 ceramics was the most suitable forthe solid elextrolyte of the hydrogen detector in a high pressure-high temperature hydrogen environments.(2) The electronic circuit was developed for hydrogen permeation current to be measured with little electronic nise.(3) The long term measurement over several months was successfully performed using the developed detector and was confirmed to get the reproducible hydrogen permeability and the diffusion coefficient.(4) It is important in the furhter research stage that the developed detector will be applied to the actual plants and so on.