Contact angle hysteresis of a drop spreading over metal surfaces

Abstract

Abstract. The paper presents experimental data on the contact angle hysteresis of the distilled water drop spreading over the surfaces of non-ferrous metals. The measurements of the advancing and receding contact angles were carried out by method of sitting drop on the horizontal surface during increasing and decreasing drop volume with a syringe pump. It was found that the contact line speed has a great influence on the hysteresis of the polished nonelastic substrates. The mechanism of spreading was described using the balance of the forces from the physical point of view.