ABSTRACT
Bronze surfaces suffer from corrosion processes if they are exposed outdoors. They are affected by the presence of different aggressive species, the alloy composition and surface preparation. Bronze can be exposed outdoors non-protected or can be pretreated in different ways. When exposed to an outdoor environment, bronze sculptures undergo various corrosion processes owing to the influence of humidity, rain and various pollutants such as sulphur dioxide, carbon dioxide. The Electrochemical impedance spectroscopy (EIS) spectra of patinated bronze samples protected by the investigated inhibitors dissolved in ethanol. From the results of the EIS measurements, it can therefore be concluded that both inhibitors exhibit similar efficiency on patinated bronze. The effectiveness of a protection system can be validated by monitoring its stability and the degree of protection which it provides when exposed to corrosive media. EIS is frequently used for the verification of the effectiveness and stability of protective systems.
