Characterizations of coatings obtained by dip coating from sol-gel suspensions

This research paper shows the conformation of coatings of the SiO2-TiO2-ZrO2 system synthesized by the sol-gel method from Si(OC2H5)(4), Ti(OBu)(4) y Zr(OC3H7)(4), which mean precursors, EtOH and water, and 2,4-pentanodione. They were deposited on stainless steel substrates AISI 304 by dip-coating in mono-layer, bi-layer and tri-layer. They were used as concentrations of the precursors Si 10% Ti 70% Zr 20% and Si 10% Ti 20% Zr 70%, which them conform the system. It was also studied the influence of the coatings on the anticorrosive behavior of the substrate in a solution of HCl to 3% by means of Electrochemical Impedance Spectroscopy (EIS) and power-dynamic curves of polarization. Additionally, it was carried out a study on adhesion of the coatings to the substrate and a study on micro-hardness of the system substrate-coatings. It was also found that the values of the electrochemical parameters changed substantially with the number of layers deposited on the substrate.