In this paper, the possibility of obtaining nanostructured water-based dispersion of TiO2 in order to protect against corrosion was investigated. The tested formulations were prepared with different compounds and additives in order to prevent the tendency toward precipitation of the nanoparticles in the aqueous medium due to attractive forces between the nanoparticles in aqueous solution. Addition of various compounds should improve the stability of the water dispersion and prevent the tendency towards the formation of agglomerates and aggregates of nanoparticles TiO2. Likewise, formulations were prepared at different pH values in order to determine the optimum conditions for the preparation of stable aqueous dispersions of nanoparticles of TiO2. The goal is to get water-dilutable coating that does not contain organic solvents, and is not harmful to human health and the environment. TiO2 dispersions were deposited on AISI 304 stainless steel and air dried. The morphology and structure of the coatings were analysed using FTIR, XRD and SEM / EDX. Electrochemical measurements were done without illumination and under UV illumination, in 3,5% NaCl. TiO2 nanostructured coatings on stainless steel act by forming a protective layer on the metal surface. Both, general and localized corrosion are suppressed, as the current in the passive range decreases, the corrosion and the pitting potential become more noble and the passive range broadens. The UV illumination pushes the open circuit potential of stainless steel to more negative values within the passive range, away from the pitting potential as a result of photogenerated cathodic protection current effect. The different coating formulations showed different degrees of dispersion stability and protective efficacy of different applications upon the stainless steel. The best result showed pH2 S and pH2 S UV formulations. The efficiency of 84.9% and 85.3%, while with respect to the width of the passive zone best result show pH2 K and pH2+D K UV formulation with a shift of potential of 684 mV and 457 mV.