Author(s)

Th. Skoulikidis & E. Kritikou

Abstract

Protective coating for marble and stones using n-semiconductors as pigments Th. Skoulikidis, E. Kritikou Department of Materials Sciences and Engineering, Faculty of Chemical Engineering, National Technical University of Athens, Athens Greece ABSTRACT In previous works we have proved that the mechanism of sulfation of marble or calcerous stones of ancient monuments is similar to the mechanism of the uniform corrosion of metals (galvanic cell model). Thus we have successfully protected marbles by anticorrosive paints so far for the protection of Steel, such as Coal Tar Epoxy (C.T.E.) and Chlorinated Rubber (C.R.). C.T.E. is black and can be used only to protect black marbles; C.R. changes color by UV light. Therefore we have used our new type of pigments that we have applied for the protection of Steel, i.e. n- semiconductors such as A^Og, Fe2Og (imitates the red patina) with epoxy or acrylic vehicle. In the present work we used the above n-semiconductor (F^Og) do

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