Zn-SiO{sub}2 substrates were prepared after modifying the zinc surface with a developed surface treatment method. The silica coating on the surface modified zinc panel showed further improvement in terms of corrosion protection of the steel substrates. The open circuit potential of the samples immersed in 5% NaCl solution was stable and reached the steel potential after around 60 days. The salt chamber result of bare zinc with SiO{sub}2 showed red rust formation after 31 days. The red rust formation was observed after 35 and 69 days in the case of samples immersed for 1 and 5 minutes respectively in the surface modifier solution followed by silica coating.
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