The Archimedes law and electrocapillarity

For an ideally polarizable electrode it is found that among numerous volume Hansen excesses there exists one which is correlated with the Archimedes law and plays the role of the solution volume displaced due to occurrence of surface layer. This volume excess could be called the Archimedes volume excess or the Archimedes volume of the surface. The Archimedes volume of the surface can be expressed in the form of a partial thermodynamic derivative.