Temporary protection of electrogalvanized steel by nanofilms of mercaptopropyltrimethoxysilane (MTMO)

P.R. SERÉ; W. EGLI; C. ELSNER; A. DI SARLI; C. DEYÁ

Turín

Encuentro; Smart and Functional Coatings, European Meeting; 2013

Consorzio Procoat

The -mercaptopropiltrimetoxisilane (MTMO) has proven to be a good temporary corrosion protection on steel, but there are few studies on galvanized steel. In this paper the effectiveness of some specific silane films was studied. They were synthesized from MTMO hydrolyzed with ethanol or methanol, applied by different methods on electrogalvanized steel and cured at different temperatures. The corrosion behavior was evaluated by polarization curves, cyclic voltammetry and humidity chamber. From the results it was concluded that the alcohol used in the hydrolysis and the curing temperature have a marked influence on the protection level afforded by the conversion film.