%0 Journal Article
%T Use of Silica Tubes as Nanocontainers for Corrosion Inhibitor Storage
%A Cesia ¨˘vila-Gonzalez
%A Rodolfo Cruz-Silva
%A Carmina Menchaca
%A Selene Sepulveda-Guzman
%A Jorge Uruchurtu
%J Journal of Nanotechnology
%D 2011
%I Hindawi Publishing Corporation
%R 10.1155/2011/461313
%X A new alkyd paint anticorrosion smart coating was developed by using silica nanoparticles as corrosion inhibitor nanocontainers. Silica particles were mixed with the paint at different concentrations to study their performance and ensure their free transportation to the damaged metal. The filling up of silica particles was done preparing three solutions: distilled water, acetone, and a mixture of both, with Fe(NO3)3 and silica particles immersed in each of the solutions to adsorb the inhibitor. Acetone solution was the best alternative determined by weight gain analysis made with the inhibitor adsorbed in silica nanocontainers. Steel samples were painted with inhibitor silica nanocontainer coatings and immersed in an aqueous solution of 3% sodium chloride. Polarization curves and electrochemical noise techniques were used to evaluate the corrosion inhibitor system behavior. Good performance was obtained in comparison with samples without inhibitor nanocontainer coating. 1. Introduction Every corrosive protection action effort may be lost or become more costly if the mechanisms are effective but not efficient and/or applied in an area ill prepared or under nonideal conditions. So it is necessary to develop new avant garde design schemes to achieve effective protection. Currently, smart coating applied in nanotechnology promise solutions to this problem and benefits everything from new applications, existing structures under more efficient solution. Storage of the inhibitor is based on the use of particles, which can play the role of nanocontainers for corrosion inhibitors adsorbed inside [1¨C3]. A new generation of anticorrosion coatings that respond to changes in the environment has sparked great interest because corrosion is one of the most important causes of destruction of structures that involve the loss of material, and prevention is paramount. This type of protection is intended to retard corrosion of the metal substrate and/or control it. In this paper, a smart system for corrosion protection was developed based on the synthesis of silica (SiO2) nanotubes and the storage and containment of ferric nitrate (Fe(NO3)3) as an oxidant corrosion inhibitor, mixed in a polymer coating to achieve a ˇ°smart inhibitor coatingˇ± performance. The coating releases the active ions, which act as a local trigger mechanism inhibiting or passivating the active metal surface, when it is required. The direct introduction of components of the protective coating inhibitor often leads to the deactivation of the corrosion inhibitor and polymer matrix degradation. To overcome
%U http://www.hindawi.com/journals/jnt/2011/461313/