The high temperature surface tension of glass is a crucial parameter for assessing its aggressive behaviour towards the soldier blocks, especially since it determines whether the glass will produce generalised and congruent corrosion, or localised corrosion along the metal line (due to the Marangoni effect at the triple point interface), generating the characteristic “coup de sabre”.

Furthermore, surface tension is a property of paramount importance in the case of glass fibres, as it has a fundamental impact on the operational parameters of the production process, on the possibility and method of drawing the melt into fibres, etc.

The determination of the surface tension at high temperature is carried out following a method specifically optimized internally by SSV. For more information, contact our experts.