Corrosion protection of aluminum by vinyltriethoxysilane coatings

Abstract

In this work the influence of the deposition parameters, i.e. silane solution concentration, deposition time and curing time on the corrosion stability of vinyltriethoxysilane (VTES) coatings on aluminum was investigated. The protective properties of vinyltriethoxysilane coatings on aluminum were investigated during exposure to 3 wt. % NaCl solution using electrochemical impedance spectroscopy (EIS), potential-time measurements, gravimetric liquid sorption measurements and adhesion measurements. It was shown that films deposited from 5 vol. % solution exhibited better corrosion stability, while the deposition time and curing time have no influence on corrosion resistance of VTES coatings.

U radu je ispitivan uticaj uslova taloženja prevlake,tj. koncentracije rastvora silana, vremena taloženja i vremena pečenja na korozionu stabilnost prevlaka viniltrietoksisilana (VTES) na aluminijumu. Zaštitna svojstva prevlaka viniltrietoksisilana na aluminijumu su ispitivana u 3 mas. % rastvoru NaCl primenom spektroskopije elektrohemijske impedancije (SEI) metode potencijal - vreme, gravimetrijske metode određivanja sorpcionih karakteristika i određivanjem adhezije. Pokazano je da veću korozionu stabilnost imaju prevlake viniltrietoksisilana taložene iz rastvora koncentracije 5 vol. %, a da vreme taloženja i vreme pečenja prevlaka nemaju uticaja na njihova zaštitna svojstva.