Patent ID: 8080151

Claim:
Process for electrochemical treatment of a construction comprising a porous medium and a corrodible substance disposed in the porous medium, the construction having properties of electrical conductivity, wherein the process comprises putting an external electrode to a surface of the construction, the external electrode being connected to a terminal of a generator, the porous medium being connected to another terminal of the generator, and the application of the following four phases at least once: a) during a first phase lasting between 12 and 360 hours, passing a negative electrical current which makes it possible to cause anions to migrate from the porous medium towards the external electrode and cations to migrate from the external electrode towards the porous medium, then b) during a second phase lasting between 2 minutes and 100 hours, interrupting the circulation of the electric current, then c) during a third phase lasting between two minutes and 24 hours, passing a positive electric current, then d) during a fourth phase lasting between 1 and 120 minutes, interrupting the circulation of the electric current.