On phase diagrams of metal-hydrogen systems

The metal-hydrogen system is considered, the isobars of hydrogen solubility in the metal are plotted with due regard for changes in the melting temperature of the metal in relation to the dissolved hydrogen. Analytical equations for the liquidus and solidus lines of the metal-hydrogen system are obtained. The diagrams of state of the iron-hydrogen and aluminium-hydrogen systems are constructed. They were calculated from the equations obtained. The dependence of the position of the lines in the diagrams of state on the external pressure is considered