Enhanced Solubility of Hydrogen in Metals under High Pressure: Thermodynamical Calculation

Abstract

The solubility of hydrogen under high hydrogen pressure was calculated for nine metals, Al, Mo, W, Fe, Ni, Pt, Cu, Ag and Au, by using the equation of state of fluid hydrogen at high pressures and solubility data at normal pressure. It is found that the solubility is enhanced substantially as the dissolution process changes from endothermic to exothermic at high hydrogen pressures.
Effects of the elastic interaction between dissolved hydrogen atoms are also examined briefly.