The surface protection of the tank against the corrosive action of the chemical and physical components that are typical of the installation site is guaranteed by a protection system against corrosion, created using a layer of epoxy paint > 350 µm (Passive Protection) combined with magnesium anodes (Active Cathode Protection).
This creates an electrochemical protection system, sizes so as to be able to protect the pressurised body against corrosion for years.