MIXED SILANE COATINGS

摘要

A method of treating a metal surface for corrosion-inhibition thereof, by application of a solution containing at least one vinyl silane and at least one bis-silyl aminosilane and an aqueous composition solution having at least one vinyl silane and at least one bis-silyl aminosilane is also provided, along with a silane coated metal surface, wherein said vinyl silane and said bis-silyl aminosilane are partially or completely hydralized. Preferred vinyl silanes include vinyltriacetoxysilane, vinyltrimethoxysilane and vinylthriethoxysilane, used in combination with preferably bis- (trimethoxysilylpropyl)amine or bis- (triethoxysilylpropyl)amine. Said metal surface may comprise steel, aluminium and Al-alloys, zinc and Zn-alloys, magnesium, copper, tin and alloys, in particular hot-dip galvanized steel, zinc sheet, steel sheet and aluminium sheet.