Nanoparticle-based corrosion inhibitors and self-assembled monolayers

Nanoparticle-based corrosion inhibitors and self-assembled monolayers 

RAJENDRAN, RVS School of Engineering and Technology, Dindigul, India 

Abstract Nanomaterials such as polyelectrolytes, layered clays, sol-gel encapsulants and surface-modified nanoparticles can function as carriers of corrosion inhibitors. Carried in this way, the inhibitors can be released on demand, triggered by change in pH, ion exchange and change in oxidation state. This chapter gives an outline of such carriers with an emphasis on the surface-modified nanoparticle/nanostructure ofboehmites. Subsequently, the chapter provides a detailed account of self-assembled nanofihns on various surfaces such as nickel oxide, copper oxide and iron oxide and their effect on corrosion resistance. 

Key words corrosion inhibitors, functionalized nanoparticles, self-assembled monolayers, surface-modified nanoparticles, nanofilms, release-on-demand inhibitors. 

CoiTosion is a natural, spontaneous and thermodynamically favoured process. There are several methods by which corrosion can be controlled one such method is the use of corrosion inhibitors. Corrosion inhibitors are chemical compounds which, when added in small quantities, reduce or completely prevent the corrosion process. They may be anodic, cathodic or mixed type depending upon whether they control the anodic reaction, the cathodic reaction or both anodic and cathodic reactions. A good inhibitor is expected to have the following characteristics  

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