Methodology of the electrochemical hydrogen permeation test: A parametric evaluation

Abstract

In this study, a methodological approach is pursued to gain an elaborated understanding concerning the Devanathan-Stachurski technique. Different experimental test parameters such as the polarization potential at the exit side, the applied charging current density, the electrolyte, the oxygen content, the sample roughness and the electrolyte composition, are modified to evaluate their influence. It is found that the surface roughness and possible contaminations from of the electrolyte are of high importance for realizing a stable entrance surface state. Furthermore, the partial transient procedure can be used for determining a diffusion coefficient which approaches the lattice diffusion coefficient.