Hydrogen Entry into Metals from Liquid Phase I

—Basic Electrochemical Reactions—

Abstract

Basic electrode reactions for the entry of hydrogen into metals under aqueous environment have been reviewed. Some analytical models that determine the parameters in the kinetics of the entry of hydrogen, including the hydrogen surface coverage and absorbed hydrogen concentration, are presented. On corrosion processes, the significance of surface film for the entry of hydrogen is emphasized from both the structure of the electric double layer at the electrode/electrolyte interface and under-potential deposition of hydrogen.