Patent ID: 8951363
Filing Date: 2015-02-10
Classification: C23C

Abstract:
1. Process for creating a corrosion protection coating layer, comprising: providing one or more alkoxysilanes according to formula (1) with the residues R, identical or different from one another, representing a substituted or non-substituted hydrocarbon group with between 1 and 22 hydrocarbon atoms and x is equal to 1, 2 or 3 and R 1 stands for a substituted or non-substituted hydrocarbon group with between 1 and 8 hydrocarbon atoms; providing an aqueous acid solution; hydrolyzing the one or more alkoxysilanes according to formula (1) with the aqueous acid solution to form a hydrolysate; providing one or more alkoxides according to formula (2) wherein Me stands for Ti, Zr, Hf, Al, Si and n stands for the oxidation level of Me and R combining the hydrolysate with the one or more alkoxides according to formula (2) to form an organosol; combining the organosol with chromium(III) ions and at least one phosphate compound to form an aqueous treatment solution; and contacting a surface to be treated with the aqueous treatment solution to form a corrosion protection layer on the surface; wherein the aqueous treatment solution is free of inorganic or organic peroxides.