Communication—Hydrogen Evolution and Elemental Dissolution by Combined Gravimetric Method and Atomic Emission Spectroelectrochemistry

Abstract

© The Author(s) 2019. A simple system is presented which allows simultaneous real time measurements of gas formation, elemental dissolution and faradaic current using a gravimetric method coupled with the atomic emission spectroelectrochemistry technique. The methodology was demonstrated using the dissolution of Al. For pure Al in alkaline solution, the ratio of evolved hydrogen to dissolved Al showed a close stoichiometric value at open circuit. For the dissolution of AA2024 alloy in the cathodic potential domain in a neutral solution, measured hydrogen was consistent with expected hydrogen evolution based upon a mass balance.