Critical wetting point in the liquid lead-molten alkali metal halogenide system

Experimental data on the surface tension of liquid lead and molten sodium, potassium, and cesium halogenides at the interface with the gaseous phase along with the values of interfacial tension between them formed the basis for analyzing the phase transition of surface wetting in two-phase high-temperature systems. The dependence of the work of adhesion of the molted salt to the metal on temperature and nature of contacting phases is established. Conditions of transition from partial wetting of the metal surface by molted salt to the film mode are found.