Patent ID: 6132808
Filing Date: 2000-10-17
Classification: C09D,C23C

Abstract:
A method of improving corrosion resistance of a metal substrate, comprising of the steps of:(a) providing a metal substrate, the said metal substrate chosen from the group consisting of:steel;steel coated with a metal chosen from the group consisting of: zinc, zinc alloy, aluminum and aluminum alloy;iron;zinc and zinc alloys;aluminum; andaluminum alloy; and(b) applying a long-term coating on the metal substrate by contacting the metal substrate with a solution containing one or more hydrolyzed or partially hydrolyzed amino silanes, one or more hydrolyzed or partially hydrolyzed multi-silyl-functional silanes and a solvent, the amino silanes and multi-silyl-functional silanes being present in a ratio of between 2:1 to 1:8, and substantially removing the solvent.