PROCESS FOR THE ANTICORROSION TREATMENT OF A SOLID METAL SUBSTRATE AND METAL SUBSTRATE CAPABLE OF BEING OBTAINED BY SUCH A PROCESS

摘要

The invention relates to an anticorrosion treatment process in which applied to an oxidizable surface of a solid metal substrate is a liquid solution, referred to as treatment solution, comprising at least one alkoxysilane in a liquid aqueous-alcoholic composition, said treatment composition being suitable for being able to form, at the surface of the solid metal substrate, a hybrid matrix by hydrolysis/condensation of the alkoxysilane(s) characterized in that, before applying the treatment solution, said oxidizable surface of the metal substrate is brought into contact with an aqueous liquid solution, referred to as conversion solution, of at least one corrosion inhibitor, said at least one corrosion inhibitor being chosen from the group formed of cations of lanthanides and said oxidizable surface of the metal substrate is kept in contact with the conversion solution under conditions suitable for forming a conversion layer of at least one lanthanide bonded via at least one covalent bond to the oxidizable surface and spreading out at the surface of the metal substrate.