Issue 48, 2005

Sol–gel coatings for corrosion protection of metals

Abstract

Sol–gel derived films exhibit a high potential as substitutes for the environmentally unfriendly chromate metal-surface pre-treatment methods. Inorganic sol–gel derived films offer good adhesion between metals and organic paint. However, they cannot provide adequate corrosion protection due to their high crack-forming potential. Introduction of an organic component to an inorganic sol–gel system leads to the formation of thicker, more flexible and functionalized films with enhanced compatibility to different organic top coatings. Incorporation of nanoparticles in the hybrid sol–gel systems increases the corrosion protection properties due to lower porosity and lower cracking potential along with enhancement of the mechanical properties. Furthermore, the incorporation of inorganic nanoparticles can be a way to insert corrosion inhibitors, preparing inhibitor nanoreservoirs for “self-repairing” pre-treatments with controlled release properties.

Graphical abstract: Sol–gel coatings for corrosion protection of metals

Article information

Article type
Feature Article
Submitted
21 Dec 2004
Accepted
21 Jul 2005
First published
18 Aug 2005

J. Mater. Chem., 2005,15, 5099-5111

Sol–gel coatings for corrosion protection of metals

M. L. Zheludkevich, I. M. Salvado and M. G. S. Ferreira, J. Mater. Chem., 2005, 15, 5099 DOI: 10.1039/B419153F

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