Calculation of surface tension isotherms of multicomponent metal systems in the molten state

A semi-empirical formula is proposed for concentration dependence of the surface tension (ST) $\sigma(x)$ in multicomponent metal systems. A procedure is developed for determination of unknown parameters in the equation for $\sigma(x)$. Calculations of the ST isotherms for binary and ternary systems show satisfactory agreement with the experimental data over the entire range of compositions. With the proposed procedure, plotting of ST isotherms is much simpler, expensive materials are saved, the amount of experimentation is reduced, and the inaccuracy of the surface parameters determined is less.