METHOD FOR PRODUCING A SILOXANE COATED METAL SUBSTRATE AND A SILOXANE COATED METAL SUBSTRATE PRODUCED THEREBY

摘要

The present invention relates to a method for providing corrosion protection to a metal substrate which comprises the steps of applying a sol gel on the metal substrate and thereafter heating the sol gel to form a corrosion protective coating wherein the sol gel comprises water a first organofunctional siloxane oligomer and a second organofunctional siloxane oligomer and wherein the sol gel is prepared by hydrolysing the first organofunctional siloxane oligomer in a first solution hydrolysing the second organofunctional siloxane oligomer in a second solution and mixing the first solution and the second solution to form the sol gel wherein the pH of the first solution and the second solution is adjusted to an acidic pH.