Calculation of surface tension and adsorption isotherms of binary systems based on $p$ metals

A two-parameter equation used to describe surface tension (ST) isotherms $\sigma(x)$ of binary alloys based on alkali metals was employed to calculate ST isotherms of binary systems of $p$ metals. The calculations results were shown to be consistent with experimental data to within the experimental uncertainty. Using a proposed here expression for $\sigma(x)$ isotherms, the formulas for calculation of adsorption and the ultimate surface activity of the additive component were obtained without use of the graphical differentiation of the curved ST isotherms.