2010 Volume 51 Issue 2 Pages 359-365
The wettability of NaCl solutions on SUS304 stainless steel was investigated under cathodic and anodic current. It was found that the contact angle became small when a cathodic current of 1.0 mA was applied, with a tendency of higher wettability for higher concentrations (between 0.01% and 0.1%). However, the decrease in the contact angle is irreversible even if the current is stopped or anodic current is applied. This phenomenon can be attributed to changes in the electric charge and the passive film at the interface.