(466a) Nanostuctured Inorganic/Organic Coating Obtained From Sol-Gel for the Corrosion Protection of Metals

A new class of materials based on organic an inorganic species combined at a nanoescale level has gained ever more attention during the last decade. This type of materials combines the complementary properties of the inorganic and organic materials which constitute them to obtain composite materials with reinforced properties. Also, there are compounds like tannins which offer properties antioxidants which can be reinforced when tannins are integrated to materials organic-inorganic.

In this work, we have been synthesized a hybrid material combining organic polymer (2-hydroxyethylmethacrylate (PHEMA)), tannins and the sol-gel process which will provide the inorganic fraction (SiO2). The aim of this work is study the chemical interactions between PHEMA, Tannins and SiO2 and his function like protective anticorrosion of metals.

Morphology, structure and properties of the organic-inorganic hybrid have investigated by IR y Raman spectroscopies, MO, SEM, thermals analysis (TGA/DSC). In addition, by GPC it has studied the molecular weight of PHEMA and Tannins.

The results obtained in this study show chemical interactions hope between these three compounds, a low roughness of the film suitable like coating anticorrosive and more thermal resistance. On the other hand, the incorporated of Tannins in the coating provides to the substrate a better protection against corrosion.

Key words: Silicium dioxide, 2-hydroxyethylmethacrylate, tannins, hybrid coatings, sol gel, corrosion.