Corrosion-inhibiting composite material, corrosion-protective material, process for preparing such corrosion-inhibiting composite material a use thereof

摘要

In the present invention, there is disclosed a corrosion-inhibiting composite material comprising a composite of a metal oxide gel and one or more corrosion inhibitors which are homogeneously distributed in a molecular-dispersed manner within the metal oxide gel. A corrosion-protective material comprises a packaging substrate material coated or impregnated with the above-described composite material or a solid filler material containing the above-described composite material. Disclosed is also a process for preparing the corrosion-inhibiting composite material wherein the preparation process comprises the following steps: (a) preparing a metal oxide sol containing SiOi2, Ali2 Oi3, TiOi2, ZrOi2 or ZnO or mixtures of the metal oxides optionally modified by R-SiOin by hydrolysis of the corresponding metal alkoxides in an aqueous, organic or mixed solvent, (b) dissolving one or more corrosion inhibitors in the metal oxide sol, (c) gelling the corrosion inhibitor-containing metal oxide sol by heating and/or neutralizing or by coating on a substrate, wherein the volatile corrosion inhibitor is homogeneously distributed in a molecular-dispersed manner in the metal oxide gel, and (d) removing the solvent. The invented corrosion-inhibiting composite material can be used a corrosion inhibitor acting in gaseous phase, for producing corrosion-protective packaging material, for coating metallic and metallized articles.