4. Modes of action of sol-gel treatments
Oxide films obtained by the sol-gel process are of potential interest for the protection of metals against corrosion due to:
the chemical and thermal inertia of the mineral oxide network;
the barrier effect of the sol-gel deposit, which limits the access of aggressive environmental species (H 2 O, ions...) to the metal substrate ;
-
strong interactions between the metal oxide layer and the inorganic layer, linked in particular to the formation of covalent bonds of the type during film formation, where M is the metal to be protected (M = Fe, Al...) and
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Modes of action of sol-gel treatments
Hybrid organic/inorganic coatings
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