Development of a sol-gel anticorrosion treatment

A treatment process for a metal alloy part comprising the following steps:

• produce a stock formulation by mixing, in equal molar parts of silicon, an alcoholic solution of hydrolyzed epoxysilane and an alcoholic solution of hydrolyzed aminosilane,
• mix the stock formulation with a suspension comprising conductive nanowires in an amount by weight between 0.1% and 10% based on the total weight of the stock formulation to obtain a dilute formulation, and
• deposit the dilute formulation on the part to obtain the coating,
• wherein the stock formulation further comprises fluorosilane, at a molar concentration between 0.5% and 5% based on the silicon derived from the epoxysilane and from the aminosilane and/or from the nanometric silica, at a molar concentration between 1% and 5% based on the silicon derived from the epoxysilane and from the aminosilane.