In this work, the application of a nanocovering of SiO 2 on artificial sulphate patina exposed to the atmosphere was sprayed with the aim of analyzing the degradation mechanisms and protective capability. The development of the nanocovering was carried out by sol-gel synthesis using Orto Tetraethylsilicate (TEOS) as precursor. The morphological and structural characterization of nanocoating was performed using Scanning Electron Microscopy (SEM) and X-ray Diffraction (DRX), resulting in an amorphous structure of SiO 2 and nanoparticle sizes from 82.7 to 92.4 nm. Polarization Resistance (Rp) and Electrochemical Impedance Spectroscopy (EIS) were the electrochemical techniques used to study the nanocovering. The electrochemical behavior of the coating in the first days showed an increase in the Rtc, after the week of exposure a decrease in the protective properties of the nano coating was observed.
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