高温设备中氢渗透速率测量电化学传感器

Electrochemical Sensor for Measuring Hydrogen Permeation Rate in the Metallic Equipment at High Temperature

设计并研制了一种在高温高压的氢环境中运行的金属设备（如加氢反应器及管线）上使用的实用型原子氢电化学传感器，在５～４０℃的温度下，其传感器的背景电流密度低于０．６μＡ／ｃｍ２。传感器测得的渗氢曲线与Ｄｅｖａｎａｔｈａｎ电化学渗氢法得到的渗氢曲线比较和对２．２５Ｃｒ１Ｍｏ钢的扩散系数测定结果表明，传感器检测的渗氢电流信号是正确的。

A practical electrochemical sensor for measuring atomic hydrogen content in the metallic equipment (e.g. shell of hydrogenation reactors) at the hydrogen atmosphere of high temperature and high pressure was designed and developed. The background current density of the developed sensor is less than 0.6 μA/cm 2 among 5～40 ℃. The comparision of the hydrogen permeation curves obtained by the developed sensor with Devanathan-stachurski method and the result of determination of the hydrogen diffusivity in 2.25Cr1Mo steel show that Hydrogen permeation current value by developed sensor is correct.