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

在以炼油厂为代表的炼油厂中，高压氢气在高温下进行处理，氢溶解到钢中，与碳或碳化物反应形成甲烷气泡，有时会导致钢的损坏。因此，研制能够提前捕捉到这种危险的高温型氢气探测器就显得尤为重要。通过两年的实验，获得了以下结果：(1)在高压高温氢气环境中，SrCeO_3陶瓷最适合作为氢气探测器的固体电解质；(2)研制了电子噪声小的氢气渗透电流测量电路。(3)利用研制的探测器成功地进行了数月的长期测量，得到了可重复性的氢气渗透率和扩散系数。(4)研制的探测器将应用于实际工厂等后续研究阶段具有重要意义。

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.