The Behavior of Galvanized Steel Coated with a Double and Triple Layer of Hybrid Films
The aim of this work is to characterize by electrochemical, physicochemical and morphological analysis the hybrid films applied on galvanized steel by dip-coating process. Preliminaries studies showed that a monolayer of silane is not enough to increase the corrosion resistance protection of the substrate. In this context, the galvanized steel was coated with a double and triple layer of hybrid film obtained from a sol constituted by silane precursors 3 - (trimetoxisililpropil) methacrylate (TMSPMA) and tetraethoxysilane (TEOS) with addition of cerium nitrate at a concentration of 0.01M. The hybrid films were cured for 20 minutes at 60°C in each application of the film. The results showed that a double and triple layer of hybrid film increase the barrier effect contributing to corrosion protection of galvanized steel.
Lucio Salgado and Francisco Ambrozio Filho
S. R. Kunst et al., "The Behavior of Galvanized Steel Coated with a Double and Triple Layer of Hybrid Films", Materials Science Forum, Vols. 727-728, pp. 1604-1609, 2012