Fundamental Analysis of Pure Titanium and Its Alloy Corrosion and Water Wettability in Solution

Wettability of a material surface plays a very important role in solid-liquid interaction phenomena used to analyze material surface treatments, soldering, and for the improvement of material properties with surfactant solutions and lubricants. In this research, the shape of a liquid droplet on a solid surface was studied theoretically following the corrosion of pure titanium and the titanium alloy in NaF solution. In general, the wettability of a material surface is evaluated by the contact angle of the liquid droplet formed on the solid surface. The shape of the liquid droplet was solved with a nonlinear differential equation numerically derived from the Laplace equation. The contact angle of the numerically derived and experimentally measured shape of water droplets was compared. As a result, the variation in the shape of the water droplet due to surface corrosion might greatly influence the contact angle.