Bipolar Metal Bridge for Electrochemical Tests in Autoclave

Abstract

The core of any electrochemical measurement lies in the assessment of interfacial potentials. The reference electrode (RE) plays an imperative role in any electrochemical measurement. Most commercially available REs need to be separated from the solution using a porous frit or a Luggin-Haber probe/salt bridge; nonetheless, a certain degree of ionic flow remains necessary. Building upon prior research, this study delves into using an inert metal wire to bridge the RE and the test solution in a physically distinct container. The impact of both physical and electrochemical variables on the efficacy of this metallic bridge was rigorously examined. Remarkably, linear correlations between potential and temperature and potential and pressure were established, while nonlinear correlations were observed with the bridge’s submerged area and the electrolyte’s concentration. Empirical equations were deduced, facilitating the correction of these effects on measurements. Furthermore, the viability of the metallic bridge was assessed as a straightforward alternative for electrochemical potential measurements in challenging environments such as autoclaves and other harsh conditions.