Dynamic Phenomena during Sessile Drop Measurements due to Oxide Layer Disruption

The wetting phenomenon between solids and liquids has an outstanding role in several technological processes [1, 2]. The knowledge of physical and chemical factors acting on the surface tension is needed to ensure the successful processing in casting, brazing and sintering. The surface oxide layer influences the wetting conditions and makes difficult the exact measurement of contact angle [3]. In this paper the effect of oxide layer disruption and recovery was observed using a high speed camera.