A Solid-State Potentiometric Sensor for Monitoring Hydrogen in Commercial Pipeline Steel

Abstract

A solid-state potentiometric sensor for monitoring hydrogen in commercial pipeline steel was developed. Performance of the sensor was investigated using five commercial steels into which hydrogen was introduced by gas charging or by corrosion reactions. The equivalent pressure of hydrogen (p H2eq ) in the steel as determined by the sensor was related to the concentration of hydrogen and to the extent of cracking of the steel. A critical p H2eq value in a steel, above which the steel would crack, was defined.

Potentiometric Sensors with Ion-Exchange Donnan Exclusion Membranes

“…Early work reporting on the potentiometric response characteristics of unmodified or “bare” Nafion membranes exhibited a very limited measuring range, and this result has perhaps discouraged progress in this area. Despite the documented benefits of such materials, only a limited number of reports on using IEDEM as potentiometric sensor materials have appeared in the literature. , In contrast, we find here that commercially available ion-exchange membranes are well suited for this purpose, with a wide response range and an attractive selectivity for selected applications.…”

“…Despite the documented benefits of such materials, only a limited number of reports on using IEDEM as potentiometric sensor materials have appeared in the literature. 25,26 In contrast, we find here that commercially available ion-exchange membranes are well suited for this purpose, with a wide response range and an attractive selectivity for selected applications.…”