Article | REF: M1722 V1

Inorganic films and protector hybrids obtained by sol-gel

Author: François-Xavier PERRIN

Publication date: March 10, 2007, Review date: February 1, 2016

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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

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Modes of action of sol-gel treatments